• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    tube clamp. a tube clamp including a strip having an inner surface defined a first channel segment located into the first and second axial ends of the strip, a clamping mechanism for drawing the first and second circumferential ends of the strip towards each other to tighten the strip, and a bridge that contacts the inner surface and circumferentially spanning a gap in the first channel segment that is located in the clamping mechanism. the bridge has a second channel segment aligned with the first channel segment so that the first and second channel segments together define a substantially continuous circular channel located in an inner portion of the clamp. the tube clamp also includes a gasket that is at least partially seated within the channel. the bridge can be connected to a reaction block used in the clamping mechanism to maintain proper position when tightening the strip.
    公开号:BR112012018121B1
    申请号:R112012018121-1
    申请日:2011-01-20
    公开日:2020-10-06
    发明作者:Brian T. Geese；Brian T. Ignaczak
    申请人:Norma U.S. Holding Llc；
    IPC主号:
    专利说明:

    TECHNICAL FIELD
    [0001] This invention relates to pipe clamps, and pipe clamps having gaskets. BACKGROUND OF THE INVENTION
    [0002] Tube clamps are commonly used to join tubular components together; for example, tubes or tubular housings. These clamps can be used in a variety of applications with some clamps specifically designed for specific components or for use in specific applications, and others of a design intended to make them more generally or universally applicable. One such application of the clamps for everything is in the connection of pipes or other components in automotive discharge systems. Usually, these discharge system applications require or at least desirably provide a joint between pipe ends that seal against leakage of exhaust gas and that have good resistance against axial separation. One type of pipe clamp is a strip clamp that is used with telescoping overlapping pipe ends, and another type is a pipe coupler that is used with adjacent pipe ends from end to end. Both types usually include a metal strip to be placed and tightened on the pipe ends, and both types can include a sealing sleeve and / or a gasket to be sandwiched between the strip and the pipe ends. SUMMARY OF THE INVENTION
    [0003] In accordance with an embodiment of the invention, a tube clamp is provided which includes a strip having an internal surface defined a first channel segment located into the first and second axial ends of the strip, a clamping mechanism for extracting first and second circumferential ends of the strip towards each other to tighten the strip, and a bridge that contacts the inner surface and circumferentially spanning a gap in the first channel segment that is located in the clamping mechanism. The bridge has a second channel segment aligned with the first channel segment so that the first and second channel segments together define a substantially continuous circular channel located in an inner portion of the clamp. The tube clamp also includes a gasket that is at least partially seated within the channel.
    [0004] According to another embodiment of the invention, a clamp is provided which includes a strip having an internal surface defining a first channel segment located into the first and second axial ends of the strip, a clamping mechanism for extracting the first and second circumferential ends of the strip towards each other to tighten the strip, a bridge that contacts the inner surface and circumferentially spanning a gap in the first channel segment that is located in the clamping mechanism, and a gasket seated at least partially within the first segment of channel. The clamping mechanism includes a reaction block, with the bridge being connected to a surface facing radially into the reaction block. Under tightening of the clamping mechanism, the bridge maintains the reaction block when the first and second circumferential ends of said strip are together and close to the reaction block.
    [0005] In other embodiments of the invention, a tube clamp having a strip, clamping mechanism, bridge, and gasket located at least partially within a channel extending circumferentially around a strip and across the bridge is provided. In some of these embodiments, the bridge may have circumferential ends that are chamfered at a selected angle (for example, within the Io range at 10 °) to then provide a substantially uninterrupted internal surface of the channel against which said gasket is seated. In either of these or those modalities, the clamping mechanism may include a reaction block that connects one or more reliefs protruding radially from the bridge to then exert a force radially inward on the bridge during the tightening of the strip. Also in these or other modalities, each of the bridge and the strip may have cooperative guide characteristics that act to guide the positioning of the bridge under the strip during use and tightening of the clamp. The guide features can be implemented in any suitable manner, but in some embodiments it includes a cutout located on the strip and an extension extending radially from the bridge that fits within the cutout. In some embodiments that use the cutout and elongation guide characteristics, a separate cutout and elongation can be located at each axial end of the strip and bridge so that the bridge is prevented from moving axially in relation to the strip in either axial direction by engagement. extensions with their respective cutouts. BRIEF DESCRIPTION OF THE DRAWINGS
    [0006] Preferred exemplary embodiments of the invention will be described herein in conjunction with the accompanying drawings, in which similar designations denote similar elements, and in which: FIG. 1 is a perspective view of a set of multitubes; FIG. 2 is an enlarged view of an exemplary embodiment of a tube clamp; FIG. 3 is an exploded view of the pipe clamp of FIG. 2; FIG. 4 is an enlarged view of an exemplary embodiment of a bridge used with the clamp of FIG. 2; FIG. 5 is a sectional view of the pipe clamp of FIG. 2 taken along line 5-5 of FIG. 4; FIG. 6 is an enlarged view of exemplary embodiments of guide features used with the pipe clamp of FIG. 2; FIG. 7 is a side view of the pipe clamp of FIG. 2; FIG. 8 is an enlarged view of an exemplary embodiment of a probe relief used with the tube clamp of FIG. 2; FIG. 9 is an enlarged view of an exemplary embodiment of a bridge and gasket assembly shown in a loose state; FIG. 10 is a partially exploded view of the bridge and gasket assembly of FIG. 9; FIG. 11 is an enlarged view of the bridge and gasket assembly of FIG. 9 shown in a tight state; FIG. 12 is a sectional view taken along line 12-12 in FIG. 11; FIG. 13 is a sectional view taken along line 13-13 in FIG. 11, showing the bridge and gasket assembly interacting with a pipe end; and FIG. 14 is an enlarged view of an exemplary embodiment of a bridge and gasket assembly showing in a tight state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
    [0007] Referring to the drawings, an exemplary embodiment of a pipe clamp 10 is used to join pipe ends together in an automotive discharge system to provide a fluid tight seal with good resistance against axial separation. As shown and described, tube clamp 10 is suitable for use as a tube coupler to secure contact tube ends, but can be adapted for telescopically overlapping tube ends. In general, tube clamp 10 has a more circular and cylindrical shape that defines an axial direction extending along or generally parallel to a center axis of the shape, a radial direction extending along the radius of the shape, and a direction circumferential extending along the circumference of the shape.
    [0008] Referring to FIG. 1, multiple clamps 10 can be used in a set of multitubes 12 commonly equipped on large trucks such as semi-trailer trucks, and commonly associated with diesel particulate filters (DPFs). In these high temperature applications, a heat shield 14 (phantom) is usually placed around the set of multitubes 12 to insulate them from their vicinity, and the multiple pipe clamps 10 are oriented so that their structures do not interfere with the heat shield. Despite the application of the DOF shown in FIG. 1, the pipe clamp 10 can be used with other exhaust system components, as well as with a single exhaust pipe assembly, and small cars without heating shields. Thus, the pipe clamps disclosed and claimed here can be used not only to ensure regular straight pipe sections, but also for such things as DPF containers, catalytic converters, and other tubular components in automotive systems, as well as in non-automotive applications. .
    [0009] Referring to FIGS. 2 and 3, clamp 10 joins a first end of contact tube or closely contact 18 of a first tube 16 with a second end of tube 22 of a second tube 20. In the illustrated embodiment, tube clamp 10 includes a strip 24, a clamping mechanism 26, a bridge 28, and a gasket 30.
    [00010] Strip 24 circumferentially surrounds the first and second ends of tube 18, 22. Strip 24 can be made of steel steel, such as grade 409 stainless steel, or other suitable material, i.e. metal worked in an open link . In different examples, strip 24 has an axial width between about 55-68 mm and has a radial thickness of about 1.22 mm; of course other dimensions are possible and will depend on the order. Still referring to FIGS. 2 and 3, strip 24 extends circumferentially from a first circumferential end 32 to a second circumferential end 34, and extends radially from a first axial end 36 to a second axial end 38. On one side facing radially inward the strip 24 has a inner surface 40, and on one side facing radially outwardly the strip has an outer surface 42.
    [00011] In the embodiment shown, strip 24 has a first and second flange 44, 46, a first channel segment 48, a first and second guide feature 50, 52, and a probe relief 54. As best shown in FIG . 4, the first and second flanges 44, 46 respectively comprise unitary portions of the first and second circumferential ends 32, 34, and are formed by portions of the strip 24 folded away from each other and back on themselves to provide a pair of protruding links radially, each link having an inner and an outer leg. The first segment channel 48 receives the gasket 30 and is located approximately midway on the strip 24 into the first and second axial ends 36, 38, and extends circumferentially at least midway between the first and second ends 32, 34. The first channel segment 48 is located on the inner surface 40 and produces a rib protruding radially on the outer surface 42. In one example, the radial depth of the first channel segment 48 as measured from the immediate vicinity and the inner fluted surface 40 is about 0.4 mm; the exact radial depth of the first channel segment may vary for different applications and may depend, among other factors, on the radial thickness of the gasket 30. The first channel segment 48 is limited by tilting the first and second transitional sections 56, 58, which lead to the first and second side walls extending axially 60, 62. In some embodiments, the first channel segment 48 extends circumferentially on the first and second flanges 44, 46 so that each flange has a radially protruding rib or a relieved or notched section located at a lower portion thereof and combining the rib protruding radially from the outer surface 42 so that the flanges can accommodate the first channel segment.
    [00012] The first and second guide features 50, 52 interact with complementary guide features of the bridge 28 to guide positioning of the bridge with respect to strip 24. When initially assembled, the pilot features help axially and circumferentially locate the bridge 28 with the strip 24. Also, when pressed down, the guide features help maintain the circumferential and axial positions of the bridge 28 with strip 24. Referring to FIGS. 2 and 6, in the illustrated embodiment, the first and second guide features 50, 52 are first and second rectangular cutouts respectively located at the first and second axial ends 36, 38. In other embodiments the first and second guide features 50,52 can have different projects and locations. For example, the guide features can be openings located on the strip 24 and positioned axially into the axial ends 36, 38, the guide features can be projections radially inward, a single guide feature or more than two guide features can provided, or a combination thereof. In addition, the first and second guide characteristics do not need to be provided on the strip 24.
    [00013] Referring to FIGS. 2 and 8, probe protrusion 54 receives a temperature and / or pressure probe so that the temperature and / or pressure of the exhaust gases passing through the first and second tubes 16, 20 can be taken. The probe protrusion 54 is mounted on the strip 24 through a peripheral sole 64 at an interface between the probe protrusion and the strip. Probe protrusion 54 is located in the first channel segment 48 so that the associated probe can be inserted through a gap 65 located between the first and second ends of everything 18, 22 (FIG. 5). The probe can be inserted through a passage 66 located on the probe protrusion 54 and through a passage 68 located on the strip 24. In other embodiments, the probe protrusion 54 does not need to be provided.
    [00014] The clamping mechanism 26 is connected to the strip 24 and can be tightened and released to bring the first and second circumferential ends 32, 34 towards and away from each other. Referring to FIG. 3, in the illustrated embodiment the clamping mechanism 26 includes a combination of double screw and nut, a reaction block 70, and a backing plate 72. The fastener combination includes a first and second T 74, 76, and a first screw and second nut 78, 80. Each nut has a half-turn head to eventually distribute clamping forces, and has a partially threaded rod. Reaction block 70 has a double convex shape and has a pair of passages to receive the first and second T screws 74, 76. Reaction block 70 has a radially internal facing surface 82 (FIG. 5), which can be a flat or it can be an arched surface. The backing plate 72 has a half-turn shape and has a pair of passages for receiving first and second screws T 74, 76. When assembled, the first and second screws T 74, 76 are inserted through the respective passages and through passages located on the first and second flanges 44, 46. When tightened, the first and second nuts 78, 80 are screwed down on the first and second screws T 74, 76, and the half-turn heads, reaction block 70, and plate support 72 act together to pull the first and second circumferential ends 32, 34 towards each other to cause a radially inward force that is evenly distributed across the circumference of the strip 24. In other embodiments, the clamping mechanism 26 can have different constructions and configurations. For example, the clamping mechanism 26 may have a combination of bolt clamp and single nut, reaction block 70 and backing plate 72 may have a cutout provided on their surfaces facing radially inward to accommodate a rib radially protruding, the reaction block and / or backing plate do not need to be provided, and the clamping mechanism can be of the quick coupling type as shown by an example in US Patent No. 7,441,311 to Lovgren et al, to name a few examples.
    [00015] When assembled, the bridge 28 covers a gap 84 (FIG. 3) otherwise the circumferentially continuous strip 24 and protects against leakage of exhaust gas there. In the cross-sectional profile, bridge 28 generally matches strip 24 and in one sense bridge 28 is a cut segment of strip 24. In some cases, bridge 28 replaces a circumferentially continuous inner seal sleeve or a circumferentially discontinuous split internal seal provided on other pipe clamps, although not required. The bridge 28 can be made of steel such as grade 409 stainless steel, or of another suitable material. In different examples, the bridge 28 can have an axial width varying between about 55-68 mm and can have a radial thickness of about 1.22 mm, about 0.74 mm or about 0.38 mm; of course, other dimensions are possible and may depend on the applications. For example, the exact radial thickness of the bridge 28 may depend on, among other factors, the desired or required structural integrity of the strip and the radial thickness of the gasket 30.
    [00016] Referring to FIGS. 3 and 4, the bridge 28 covers the axial extension of the strip 24 and has a first axial end 86 which is axially aligned with the first axial end 36 of the strip, and has a second axial end 88 which is axially aligned with the second axial end 38 of the strip. The bridge 28 has a circumferential length that is at least coextensive with the circumferential extension of the gap 84 and can be more or less than shown. The bridge 28 extends circumferentially from a first circumferential end 90 to a second circumferential end 92. The first circumferential end 90 can have a first chamfer or bevel cut 94 (FIG. 7), and the second circumferential end 92 can have a second chamfer or bevel cut 96. The first and second bevel cuts 94, 96 provide a smooth and more uninterrupted progression between the bridge 28 and the strip 24 to accommodate the seated gasket 30, as compared to the uncut bevel end that would produce a vertical step in it and in some cases it can deform the gasket and thus be a source of fluid leakage. In some cases, a minimal transitional structure (eg beveled edge) between the bridge 28 and the strip 24 facilitates the use of a thinner gasket that would otherwise be the case (eg vertical step). In one example, the first and second beveled surfaces create an angle of 1-10 °, preferably 2nd, with respect to an outer surface 100 of the bridge 28. The first and second bevel cuts 94, 96 are located continuously along the edge from the respective first and second circumferential ends 90, 92. On one side facing radially inward the tip 28 has an internal surface 98k and on one side facing radially outward the bridge has an external surface 100.
    [00017] Referring to FIGS. 3-5, in the illustrated embodiment the bridge 28 has a second channel segment 102, a first and second reliefs 104, 106, and a first and second guide feature 108, 110. The second channel segment 102 is similar in shape and size to the first channel segment 48 of strip 24. When assembled, the first and second channel segments 48, 102 together define a circumferentially continuous cir4cular channel 112 that is located on the inner portion of the tube clamp 10 or on the inner surface facing radially to inside the tube clamp. The second channel segment 102 receives a gasket section 30 and is located approximately axially midway on the bridge 28 into the first and second axial ends 86, 88, and extends circumferentially between the first and second circumferential ends 90, 92. The axial extension of the second channel segment 102 may be substantially the same as the first channel segment 48, or it may be slightly less than the first channel segment. The second channel segment 102 is located on the inner surface 98 and produces a rib radially protruding on the outer surface 100. In one example, the radial depth of the second channel segment 102 as measured from the immediate vicinity and inner channeled surface 98 is about 0 , 4 mm, the exact radial depth of the second channel segment may vary for different applications and may depend, among other factors, on the radial thickness of the gasket 30. The second channel segment 102 is limited by the first and second inclined transitional sections 114, 116 leading to the first and second axially extending side walls 118, 120.
    [00018] The first and second reliefs 104, 106 are respectively located on the first and second side walls 118, 120, and, when assembled, are located radially below the clamping mechanism 26. Each relief 104, 106 can produce a rectangular structure protruding radially on the outer surface 100, or it may produce a structure in another way. Axially, each relief 104, 106 covers a majority of the axial extension of the respective side wall 118, 120, and circumferentially, each relief covers the circumferential extension of reaction block 70. When mounted and in a loose state (eg not tightened) ), a first and second space 122, 124 are located between the first and second reliefs 104, 106 and the first and second tubes 16, 20.
    [00019] The first and second guide features 108, 110 complement and interact with the first and second guide features 50, 52 on strip 24. Referring to FIGS. 3, 4, and 6, in the illustrated embodiment the first and second guide features 108, 110 are first and second extensions respectively extending radially outwardly from the first and second axial ends 86, 88. The first and second extensions are received at the first and second cutouts of strip 24. Like the first and second guide features 50, 52 of strip 24, the first and second guide features 108, 110 can have different designs and locations and can largely depend on the design and location of the guide features the strip, or vice versa. For example, the guide features could be located into the axial ends, the guide features can be cutouts or openings, a single guide feature or more than two guide features can be provided, or a combination thereof. In addition, the guide features do not need to be provided on the bridge.
    [00020] In some embodiments, the bridge 28 can be pre-assembled for other components of the pipe clamp 10, although not required. For example, bridge 28 can be connected to strip 24 by one or more weld points as one side of the bridge and strip opposite the guide features such as near the second circumferential end 92, in this case, the first circumferential end 90 and the the first and second guide characteristics 108, 110 would be slidable in the circumferential direction with respect to the first circumferential end 32 under assembly and tightening for appropriate circumferential adjustment. Also, bridge 28 can be connected to reaction block 70 by one or more welding points. These weld points can be located away from the second channel segment 102 to avoid deformation of the channel segment and possible interference with the gasket 30 under assembly. In addition, the bridge 28 can be connected to the strip 24 through a mechanical interlock such as by folded flaps which are wrapped around the first and second axial ends 36, 38 of the strip.
    [00021] Gasket 30 is seated in channel 112 and forms a metal gasket seal at the first and second ends of tube 18, 22. Gasket 30 can be made of any material suitable for independent application. For example, a relatively soft material that is compressed when strip clamp 10 is tightened; for automotive applications such materials may include a graphite-based material, a mica-based material, a ceramic fiber, and a glass fiber. In some cases, and depending on the material used for the gasket 30, a stainless steel blade can be located on an internal surface 126 to protect the gasket against direct contact with exhaust gas which could cause oxidation. Referring to FIGS. 3 and 5, gasket 30 has an outer surface 128, and has an axial width approximately equal to that of channel 112. Gasket 30 may have a radial thickness approximately equal to or greater than the radial depth of channel 112. In the case of a thickness radial greater than the radial depth, the gasket can radially compress under tightening of the clamping mechanism 26 to allow a metal-to-metal engagement between the side walls 60, 62 and the outer surfaces of the tubes 16, 20. In some cases, a gasket radially thinner 30 can facilitate such metal-to-metal engagement. Exemplary radial thicknesses of the gasket 30 include 0.5 mm, 0.76 mm, and 1.5 mm; of course other thicknesses are possible. A pressure sensitive adhesive can be located on the outer surface 128 to pre-assemble the gasket 30 to the strip 24 and / or the bridge 28, or a stainless steel structure can be incorporated in the gasket in order to transmit a resiliently elastic force radially to outside that pre-assembles the gasket to the strip through pressure adjustment. And then not shown, a passage may be located in the gasket 30 to receive the temperature and / or pressure probe. In other embodiments, the gasket 30 may have different constructions. For example, the gasket 30 does not need to be circumferentially continuous as shown and instead it could be circumferentially discontinuous like an open link with circumferential ends meeting, or the gasket may have an axial width greater or less than channel 112.
    [00022] In use, the bridge 28 is positioned inside the strip 24 and radially below the clamping mechanism 26. The outer surface 100 of the bridge 28 abuts against the inner surface 40 of the strip 24, and the outer surface of the rib protruding radially formed by the second channel segment 102 and the outer surfaces of the first and second reliefs 104, 106 touching against the inner surface 82 of the reaction block 70. The gasket 30 can be seated in the channel 112 before the tube clamp 10 is placed around of the pipe ends 18, 22. Then the gasket 30 remains seated in channel 112 by an outward elastic force exerted by the gasket against the channel because of its intrinsic resilience, or it can be more positively maintained in the channel through an adhesive, retainer or other mechanical interconnection.
    [00023] Under tightening, the reaction block 70 exerts an inward radial force against the rib, radially protruding from the second channel segment 102 and the first and second reliefs 104, 106, which in turn exert an inward radial force against the gasket 30 and the first and second ends of tube 18, 22. Thus, together the rib radially protruding and the first and second reliefs 104, 106 distribute the inward radial force exerted across the axial width of the bridge 28 and to the underlying gasket 30 and tube ends 18, 22, as opposed to superimpose distribution of the radial force exerted on the rib, radially protruding on the bridge which can itself deform and over-compress the gasket. The first and second reliefs 104, 106 transmit rigidity and strength to the bridge 28 at a location below the reaction block 70 which prevents overcompression of the gasket 30 therein and the resulting leakage may otherwise occur. Also, the distributed radial force prevents deformation to the reaction block 70 as it can otherwise occur against the rib, radially protruding and without the first and second reliefs 104, 106. In the illustrated embodiment, the circumferential extension of the strip cutouts allows the strip to be contract circumferentially under tightening while avoiding interference that might otherwise occur from the first and second bridge extensions 28.
    [00024] Referring to FIGS. 9-13, an illustrated embodiment of a bridge and gasket assembly includes a bridge 228, a first gasket 230, and a second gasket 231. The bridge and gasket assembly may be a part of the tube clamp 10 with the strip and mechanism tightening points described with reference to FIGS. 1-8.
    [00025] Bridge 228 is similar in some ways to bridge 28 of FIGS. 1-8, and some of those similarities will not be described here. When assembled, the bridge 228 covers a gap 284 on the otherwise continuous strip 224 and protects against leakage of the exhaust gas therein. In the illustrated embodiment, the bridge 228 is generally rectangular in shape and covers the axial extension of the strip 224, and has a first axial end 286 and a second axial end 288. The bridge 228 also has a first circumferential end 290 and a second circumferential end 292; the first and second circumferential ends do not, although they may have, a beveled or beveled edge. On one side facing radially inward the bridge 228 has an inner surface 298, and on one side facing radially inward the bridge has an outer surface 300. The inner surface 298 is a generally level surface and does not have, although it may have, a channel segment located on it.
    [00026] In the side profile and in a non-tightened state, as shown in FIGS. 10, the bridge 228 has a more pronounced and sharper bend than strip 224, in other words, the bridge has a bend radius smaller than that of the strip. This structural relationship produces a radial gap between the first and second ends near the bridge 228 and the strip 224 when the bridge is connected to the clamping mechanism 226. During the tightening of the pipe clamp 210, interference is avoided between the respective first and second circumferential ends 228 and strip 224, as may occur in some cases with no radial span. The radial span also delays the contact and engagement between the bridge 228 and the strip 224, between the bridge and the first gasket 230, and between the first gasket and the second gasket 231 until greater stages of the tightening action when the first and second circumferential ends 232, 234 of the strip are pulled together. This can help to avoid wrong positions of the bridge 228 with respect to strip 224, and can help to avoid wrong positions of the first and second gaskets 230, 231 with respect to each other such as grouping or welding the gasket material, especially grouping the material of the first gasket on the first and second circumferential ends 290, 292 of the bridge.
    [00027] Referring to FIGS. 9-11, in the illustrated embodiment, bridge 228 has a first flange 301, a second flange (not shown), a first cutout 303, and a second cutout 305. The first and second flanges 301 help locate the bridge 228 on strip 224 and they help to strengthen the structure of the 228 bridge to help prevent warping and other deformation that may occur during assembly, tightening, and use. The first and second flanges 301 are respectively located at axial ends 286, 288 and are bent at angled sides perpendicular to the outer surface 300. The first and second flanges 301 do not need to be provided for certain applications, such as where no structural strengthening features is required or where different structural strengthening characteristics are provided as circumferentially directed ribs.
    [00028] The first and second cutouts 303, 305 facilitate the transition between the first and second gaskets 230, 231 when engaging and confronting the gaskets. The cutouts 303, 305 limit direct engagement between point 228 and the first gasket 230 during the tightening action, and can help to avoid wrong positions such as grouping or welding the gasket material, especially by grouping the material of the first gasket at the first and second ends circumferential lines 290, 292 of the bridge. The first and second cutouts 303, 305 are respectively located at the circumferential ends 290, 292 and are generally U-shaped voids at the ends, of course, other forms of void are possible such as half circle shapes. The first and second cutouts 303, 305 have an axial extension that can be equal to or greater than the axial extension of the second gasket 231, and have a circumferential extension sufficient to span the gap 284 in the strip 224 when the strip is tightened. Each cutout has a first side edge 307, a second side edge 309, and a bottom edge 311. Cutouts 303, 305 do not necessarily need to be provided on bridge 228.
    [00029] In assembly, the bridge 228 is connected to the reaction block 270 so that the bridge is in the reaction block during tightening action in order to properly locate the position of the bridge in relation to the strip 224; for example, to position properly circumferentially with respect to the circumferential ends 232, 234 of the strip. The bridge 228 can be pre-assembled and connected to the reaction block 270 before the tube clamp 210 is placed around the tube ends. Referring to FIG. 10, during tightening, the bridge 228 moves with the reaction block 270 as the first and second flanges 244, 246 of the strip 224 move towards each other, as one of the first and second flanges moves towards the other, and / or as the reaction block moves towards one of the first and second flanges of the strip (movement of the reaction block represented by arrows A, B). This can also help to avoid wrong positions such as grouping or welding gasket material, especially grouping material from the first gasket 230 at the first and second circumferential ends 290, 292 and / or the bottom edge 311 of the bridge 228. Referring to FIGS. 9 and 11, the bridge 228 can be connected to the reaction block 270 through weld points 313 which bring the outer surface 300 in direct contact with the surface facing radially into the reaction block. The bridge 228 can also be connected in other ways such as by folded flaps extending from the bridge and compressing both sides of the reaction block 270 or connecting a retaining structure.
    [00030] The first gasket 230 is seated on the first channel segment 248 of strip 224 and forms a metal gasket seal against the first and second tube ends. The first gasket 230 can be made of any suitable material as described above in connection with the gasket 30. In this regard, the first gasket 230 is similar in some ways to the gasket 30 of FIGS. 1-8, and some of these similarities will not be described here. Referring to FIGS. 9-11, the first gasket 230 has an inner surface 326 and an outer surface 328. A stainless acid blade can be located on the inner surface 326 as previously described for the embodiment of FIGS. 1-8, and a pressure sensitive adhesive, a modalized stainless steel structure or some other adhesion characteristic can be used and / or located on the outer surface 328 in order to pre-assemble and connect the first gasket 230 to the strip 224. The first gasket 230 has a split, open link structure, and has a first and second circumferential ends 315, 317. Referring to FIGS. 10 and 12, when the first gasket 230 following the inner surface 240 of the strip 224, and the first and second circumferential ends 315, 317 surround at least part of the path of the first and second flanges 244, 246 of the strip. The first and second circumferential ends 315, 317 confront the inner surface 240 on the first and second flanges 244, 246, and can maintain direct contact with the inner surface on the flanges (FIG. 12) or can oppose the inner surface on the flanges through a interval (not shown).
    [00031] The second gasket 231 is located against the inner surface 298 of the bridge 228 and forms a metal gasket seal against the first and second pipe ends (although not shown in the phantom in FIG. 9, which sometimes indicates that a part is hidden behind or under another part). The second gasket 231 is similar in some ways to the gasket 30 of FIGS. 1-8, and some of these similarities such as material will not be described here. Referring to FIGS. 9-11, the second gasket 231 has an inner surface 319 and an outer surface 231. A stainless steel blade may be located on the inner surface 319 as previously described for the embodiment in FIGS. 1-8, and a pressure sensitive adhesive, or some other adhesion feature can be used and / or located on the outer surface 231 in order to pre-assemble and connect the second gasket 231 to the bridge 228. The second gasket 231 has a arcuate structure, and has first and second circumferential ends 323, 324. Referring to FIGS. 9 and 11, the circumferential ends of the second gasket 231 at least partially overlap the cutouts 303, 305 and extend in the circumferential direction beyond the lower edges 211 of the cutouts.
    [00032] The bridge and gasket assembly of FIGS. 9-13 is designed to provide a smooth and mostly uninterrupted transition and progression between the first and second gaskets 230, 231, and between the bridge 228 and the first gasket. In other words, the assembly is designed to minimize or otherwise eliminate a vertical step or other form of uneven surface, which in some cases may deform the second gasket 231 and / or cause uneven surface-to-surface contact between the clamp. tube 210 and the tube, and consequently be a source of exhaust gas leakage. One way to facilitate a mostly uninterrupted transition is to maintain certain radius-thickness ratios between the bridge 228, the first gasket 230, and the second gasket 231. For example, the first gasket 230 may have a radial thickness value that is greater than the radial thickness of the bridge 228, and greater than the radial thickness of the second gasket 231. Also, the radial thickness of the first gasket 230 can be greater than or equal to the sum of the radial thicknesses of the bridge 228 and the second gasket 231. In one example , the radial thickness of the bridge 228 is about 0.38 mm, the radial thickness of the first gasket 230 is about 1.0 mm, and the radial thickness of the second gasket 231 is about 0.45 mm. Of course, the bridge 228 and the first and second gaskets 230, 231 do not need to satisfy these ratios, and may have different radial thickness values for each of the bridge and the first and second gaskets; for example, the first gasket and / or the second gasket can have a radial thickness of about 0.6 mm.
    [00033] Referring to FIGS. 12 and 13, when the tube clamp 210 is in a tight state, the first and second gaskets 230, 231 become compressed together against the outer surface of the tubes (second tube 220 shown), and the bridge 228 becomes embedded in the material of the first gasket. This is partially facilitated by satisfying at least some of the radius-thickness ratios described above, although it may exist in some cases without satisfying the ratios. Referring to FIG. 13, the first circumferential end 232 of the second gasket 231 and the facing portion of the first gasket 230 are compressed together, and the lower edge portion 311 of the bridge 228 is modeled on the facing portion of the first gasket to create a transition T section substantially uninterrupted in it and a substantially level interface between them. This occurs on the other side of the gaskets and bridge as well, although not shown.
    [00034] Referring to FIG. 14, another illustrated embodiment of a bridge and gasket assembly is shown that is similar in several ways to the bridge and gasket assembly of FIGS. 9-13, and some of these similarities will not be described here; for example, a first gasket 430 is similar to the first gasket 230, and a second gasket 431 is similar to the second gasket 231.
    [00035] A bridge 428 covers a gap in the opposite of continuous strip 424 and protects against leakage of exhaust gas in it. The bridge 428 has a first axial end 486 and a second axial end 488, and has a first circumferential end 490 and a second circumferential end 492. Like bridge 228, bridge 428 has a sharper and more pronounced fold than strip 424 .
    [00036] In the illustrated embodiment, the bridge 428 includes first and second triangular arms 527, 529 extending in circumferential directions opposite to each other. A first and second axial side 531, 533 on each of the arms 527, 529 converge in the direction of each other and in the direction of the axial centerline C of the second gasket 431. The sides 531, 533 can meet at one point as shown, but not they need and can create a rounded or blunt circumferential end. In use, leakage of potential exhaust gas is taken out and migrates along the sides 531, 533 towards the axial centerline C and is consequently kept from escaping together.
    [00037] Like bridge 228, bridge 428 is connected to reaction block 470 through, for example, welding points 513. The second gasket 431 is shown in the phantom and is located on the internal surface of the bridge 428. The second gasket 431 has circumferential ends that extend in the circumferential direction behind the first and second arms 527, 529. And the bridge 428 can have the radius-thickness ratios described above for the bridge 228, and in a tight state the gaskets 430, 431 are compressed and the bridge 428 is embedded in the material of the first gasket.
    [00038] It is to be understood that the above description is not a definition of the invention, but is a description of one or more preferred exemplary embodiments of the invention. The invention is not limited to the particular modalities (s) disclosed herein, but instead is defined solely by the claims below. In addition, the statements contained in the previous description relate to particular modalities and are not to be construed as limiting the scope of the invention or the definition of terms used in the claims, except where a term or phrase is expressly defined above. Various other modalities and several changes and modifications to the disclosed modality (s) will become apparent to those skilled in the art. All such other modalities, changes, and modifications are intended and fall within the scope of the appended claims.
    [00039] As used in this specification and claims, the terms "for example", "by instance" and "such as", and the verbs "comprising", "having", "including", and their other verb forms, 1 when used in conjunction with a list of one or more components or other items, they are each to be constructed as open, meaning that the list is not to be considered as excluding another, additional components or items. Other terms are to be constructed using their broadest reasonable meaning unless they are used in a context that requires a different interpretation.
    权利要求:
    Claims (12)
    [0001]
    1. A tube clamp (10) comprising: a strip (24) extending circumferentially from a first circumferential end (32) to a second circumferential end (34), and extending axially from a first axial end (36) to a second axial end (38), the strip having an inner surface (40) defining a first channel segment (48) located into the first and second axial ends and extending at least halfway between the first and second circumferential ends; a clamping mechanism (26) connected to the strip and including at least one fastener (74, 76, 78, 80) to bring the first and second circumferential ends towards each other to clamp the strip, the clamping mechanism having a block reaction (70) with a radially inward surface (82); a bridge (28) contacting the inner surface and circumferentially spanning a gap in the first channel segment in the clamping mechanism, the bridge having a second channel segment (102) aligned with the first channel segment so that the first and second segments together define a continuous circular channel (112) located in an inner portion of the clamp; and a gasket (30) seated at least partially within the channel; characterized by the fact that the bridge has a first side wall extending from one side of the second channel segment to a first axial end, and has a second side wall extending from an opposite side of the second channel segment to a second axial end , the bridge has a first relief (104) located on the first side wall and radially below the clamping mechanism, and has a second relief (106) located on the second side wall and radially below the clamping mechanism, the first and second reliefs are project radially outward so that, during tightening, the radially inward surface of the reaction block engages the first and second reliefs and engages an external surface of the bridge in the second channel segment to exert a radially inward force on the reliefs and the second channel segment.
    [0002]
    2. Pipe clamp according to claim 1, characterized by the fact that the bridge has first and second circumferential ends (90, 92), the first circumferential end having a first bevel cut (94) located in it and the second circumferential end having a second bevel cut (96) located therein, the first and second bevel cuts providing an uninterrupted internal surface of the continuous channel against which the gasket is seated.
    [0003]
    Tube clamp according to claim 2, characterized by the fact that each of the first and second bevel cuts create an angle in the range of 1 ° to 10 ° with respect to an external surface of the bridge.
    [0004]
    Tube clamp according to claim 1, characterized in that the strip has a first guide feature (108) located therein, and the bridge has a second guide feature (110) that interacts with the first feature guide to guide positioning of the bridge against the inner surface of the strip.
    [0005]
    5. Tube clamp according to claim 4, characterized in that the first guide feature is a cutout located at the first axial end of the strip, and the second guide feature is an extension extending radially from the first axial end of the bridge, the extension being received in the cutout to then allow relative circumferential movement of a first circumferential end of the bridge in relation to the first circumferential end of the strip while maintaining axial alignment of the bridge and the strip.
    [0006]
    6. Pipe clamp according to claim 1, characterized by the fact that the gasket is pre-assembled within the channel before the pipe clamp is used to join pipe ends.
    [0007]
    7. Tube clamp according to claim 1, characterized by the fact that the bridge is connected to the reaction block on the surface radially facing inwards, where, under tightening of the clamping mechanism, the bridge maintains with the reaction block when the first and second circumferential ends of the strip are together and closer to the reaction block; and the gasket is at least partially seated within the first channel segment.
    [0008]
    Pipe clamp according to claim 7, characterized by the fact that the bridge is connected to the reaction block through one or more welds (313, 513) directly connecting an external surface of the bridge to the surface radially facing into the block reaction.
    [0009]
    A pipe clamp according to claim 7, characterized by the fact that the bridge has a first cutout located at a first circumferential end (90) thereof and has a second cutout located at a second circumferential end (92) thereof, the first and second cutouts having the same axial extension as the first channel segment.
    [0010]
    A pipe clamp according to claim 9, characterized by the fact that: the strip has a first and second flanges (44, 46, 244, 246) respectively extending from the first and second circumferential ends of the strip, the first and second flanges opposing each other; the clamping mechanism is connected to the first and second flanges; the gasket has an open link structure with a first circumferential end (315) and a second circumferential end (317), the first circumferential end located on the first flange and facing the first flange, and the second circumferential end located on the second flange and facing the second flange; and the tube clamp further comprises a second gasket (231) located on the bridge and having a first circumferential end (323) at least partially overlapping the first cutout and having a second circumferential end (325) at least partially overlapping the first cutout.
    [0011]
    11. Tube clamp according to claim 10, characterized in that the radial thickness of the gasket is greater than the radial thickness of the second gasket in order to facilitate an uninterrupted transition between the gasket and the second gasket with respect to a surface internal transition when the tube clamp is in a tight state and the gaskets are compressed against an outer surface of a tube.
    [0012]
    Pipe clamp according to claim 7, characterized in that the bridge has a first axial side (531) and a second axial side (533), the first and second axial sides converge in the direction of the other and in the direction of an axial center line (C) of the gasket at a first circumferential end (490) and at a second circumferential end (492) of the bridge, the converging first and second circumferential sides facilitate extraction of the exhaust gas leak in the direction of the line gasket.
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    同族专利:
    公开号 | 公开日
    KR101835601B1|2018-03-08|
    WO2011091135A3|2011-10-27|
    US20120018999A1|2012-01-26|
    KR20120123454A|2012-11-08|
    BR112012018121A2|2017-06-27|
    EP3557107B1|2020-12-16|
    MX2012008526A|2012-08-31|
    EP2526330A2|2012-11-28|
    WO2011091135A2|2011-07-28|
    EP3557107A1|2019-10-23|
    CN102713396B|2015-12-16|
    CN102713396A|2012-10-03|
    EP2526330A4|2014-05-07|
    JP2013518221A|2013-05-20|
    US9103476B2|2015-08-11|
    MX338366B|2016-04-13|
    RU2012135703A|2014-02-27|
    JP5722348B2|2015-05-20|
    CA2787036C|2017-11-28|
    CA2787036A1|2011-07-28|
    EP2526330B1|2019-07-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US356083A|1887-01-11|Geoege scheadeb |
    US896333A|1904-06-18|1908-08-18|Anthony P Smith|Connecting branch sleeve.|
    US982028A|1910-02-08|1911-01-17|Josiah Boone Austin|Pipe-union.|
    US1903029A|1930-05-07|1933-03-28|Victaulic Co Of America|Pipe coupling|
    US1942600A|1932-09-06|1934-01-09|Elias J Hornung|Clamp|
    US2650115A|1950-04-04|1953-08-25|Taylor Forge & Pipe Works|Pipe coupling|
    US3086270A|1960-05-11|1963-04-23|Wittek Mfg Co|Hose clamp and method of assembly|
    US3355193A|1966-03-23|1967-11-28|Mueller Co|Service connection clamp|
    US3472537A|1967-08-01|1969-10-14|Dresser Ind|Pipe clamp having side outlet|
    US3471176A|1968-06-10|1969-10-07|Vega Manuf|Tapping saddle|
    US3700008A|1971-05-28|1972-10-24|Mueller Co|Pipe clamp with improved gap bridge|
    US3905623A|1974-04-05|1975-09-16|Cassel Thomas Richard|Pipe coupling with deformable outer sleeve|
    US4056273A|1976-12-08|1977-11-01|Cassel Thomas Richard|Coupling for pipe lap joints|
    US4155574A|1978-04-21|1979-05-22|Plessey Incorporated|Simplified pipe coupling|
    US4315348A|1979-05-08|1982-02-16|Hans Oetiker|Mechanical lock for clamps|
    JPS5647989U|1979-09-19|1981-04-28|
    US4364588A|1980-11-10|1982-12-21|Garlock, Inc.|Band seal clamp|
    JPS58167389U|1982-04-30|1983-11-08|
    US5339496A|1984-06-20|1994-08-23|Hans Oetiker Ag Maschinen- Und Apparate-Fabrik|Self-aligning clamp structure|
    US4664428A|1986-04-01|1987-05-12|Brico Industries, Inc.|Sealing assembly for pipe joint|
    US5315742A|1993-01-13|1994-05-31|Murray Corporation|Hose clamp with open diameter lock|
    US5410781A|1993-12-13|1995-05-02|Tridon Limited|Constant tension clamp|
    US5769467A|1995-10-10|1998-06-23|Bridges; Donald Y.|Pipe couplings for misaligned or out-of-round pipes and expanding/contracting pipes|
    US5765876A|1995-11-24|1998-06-16|Bridges; Donald Y.|Pipe coupling requiring low closing force|
    DK9500486U3|1995-12-18|1997-04-11|Lindab As|Device for connecting pipe pieces|
    US5669113A|1996-08-05|1997-09-23|Murray Corporation|Hose clamp|
    US6269524B1|1998-06-11|2001-08-07|Thomas R. Cassel|Band clamp|
    US6519815B2|1998-06-11|2003-02-18|Bks Company, Llc|Band clamp|
    US6305054B1|1999-07-02|2001-10-23|Donaldson Company, Inc.|Exhaust system clamp|
    US6758501B2|2000-06-23|2004-07-06|Breeze-Torca Products, Llc|Pipe coupler|
    US6877780B2|2000-06-23|2005-04-12|Breeze-Torca Products, Llc|Clamp for joining tubular bodies|
    CA2428617C|2000-11-22|2009-07-21|Cooper Technology Services, Llc|Bracket for attaching a clamp to a hose|
    AU2002313651A1|2001-06-29|2003-03-03|Breeze-Torca Products, Llc|Clamp for joining tubular bodies|
    US6634607B2|2001-09-14|2003-10-21|Donaldson Company, Inc.|Pipe clamp|
    US6877191B2|2001-09-17|2005-04-12|Dwws, Llc|Band clamp|
    US6588070B2|2001-11-08|2003-07-08|Hai Tran|Pipe leak repair clamp|
    JP2004044394A|2002-07-08|2004-02-12|Yamaha Motor Co Ltd|Mounting structure of coupling member|
    US7052052B2|2003-03-13|2006-05-30|Donaldson Company, Inc.|Sealing gasket for a clamp|
    WO2005046937A2|2003-11-07|2005-05-26|Breeze-Torca Products, Llc|Pipe clamp with integral latch|
    US7490871B2|2004-02-26|2009-02-17|Breeze-Torca Products, Llc|Pipe clamp with button engagement hole|
    US20050066480A1|2004-03-26|2005-03-31|Aba Of Sweden Ab|Band clamp|
    AU2006213730B2|2005-02-10|2012-04-05|Norma U.S. Holding Llc|Pipe clamp with gasketed center rib|
    CN100552274C|2005-02-10|2009-10-21|布雷兹-托卡产品有限责任公司|The pipe collar that comprises center rib with pad|
    US7441311B2|2005-03-04|2008-10-28|Breeze-Torca Products, Llc|T-bolt clamp quick attach latch|
    JP4699150B2|2005-09-16|2011-06-08|日本ヴィクトリック株式会社|Housing type pipe fitting|
    JP4701073B2|2005-11-14|2011-06-15|ショーボンドカップリング株式会社|Structure of slide plate in pipe joint|
    KR100716062B1|2006-09-11|2007-05-08|벽진산업 주식회사|Pipe Coupling|
    CN101939581B|2008-01-30|2013-03-06|诺玛美国控股有限责任公司|Single-bolt band clamp with gasketed center rib and pipe lap joint using the same|
    US9032592B2|2009-04-14|2015-05-19|Voss Industries, Inc.|Band clamp|US20110031704A1|2009-05-15|2011-02-10|Lehr Brian C|Segmented Gaskets|
    US20110095520A1|2009-10-28|2011-04-28|Eliezer Krausz|Pipe coupling with seal pressing device|
    DE102011112633B4|2011-09-05|2015-06-11|Faurecia Emissions Control Technologies, Germany Gmbh|Exhaust pipe assembly and method for attaching a mounting plate to an exhaust pipe|
    US8960729B2|2011-12-15|2015-02-24|Eliezer Krausz Industrial Development Ltd.|Clamp assembly with annular clamps and bridge|
    DE102012002196A1|2012-01-24|2013-07-25|Winfried Felber|Device for connecting two different outer diameter roundings|
    GB201209696D0|2012-05-31|2012-07-18|Teconnex Ltd|Clamping means and method of use thereof|
    CN103134102A|2013-03-08|2013-06-05|河南乾丰暖通科技股份有限公司|Sliding plate type sealing pipe joint|
    FR3004505B1|2013-04-11|2015-05-08|Caillau Ets|CLAMPING DEVICE FOR THE SEALED COUPLING OF SMOOTH TUBES|
    US10279247B2|2013-12-13|2019-05-07|Masimo Corporation|Avatar-incentive healthcare therapy|
    BR102015019177A2|2014-08-14|2016-06-28|Cnh Ind America Llc|mounting set for a silencer of an off-road vehicle and its mounting method|
    TWI555664B|2015-09-17|2016-11-01|陳金柱|Fixture|
    JP6576822B2|2015-09-18|2019-09-18|Ntn株式会社|Boots band|
    WO2017047377A1|2015-09-18|2017-03-23|Ntn株式会社|Boot band|
    US9850925B2|2015-09-28|2017-12-26|Emadeddin Zahri Muntasser|Tube marking clamp|
    US10180154B2|2015-09-28|2019-01-15|Emadeddin Zahri Muntasser|Marker holder|
    FR3042016B1|2015-10-01|2017-11-24|Caillau Ets|TIGHTENING CLAMP WITH SPACER|
    FR3061246B1|2016-12-27|2019-07-26|Thales|CERCLAGE DEVICE|
    US10072787B2|2017-02-02|2018-09-11|Honda Motor Co., Ltd.|Clamping system|
    GB2559412B|2017-02-06|2019-05-15|Ford Global Tech Llc|Heatshield for a band clamp|
    CN110506179B|2017-03-07|2021-07-23|诺玛美国控股有限责任公司|Pipe clamp and pipe joint with sensor accommodating part|
    GB201704520D0|2017-03-22|2017-05-03|Teconnex Ltd|Clamping apparatus and method of use thereof|
    US10837344B2|2017-09-13|2020-11-17|GM Global Technology Operations LLC|Converter V-band clamp anti-rotation and assembly aid|
    US10974783B2|2018-08-17|2021-04-13|Harley-Davidson Motor Company Group, LLC|Exhaust shield assembly|
    KR20200031751A|2018-09-14|2020-03-25|현대자동차주식회사|Hose clamp|
    CN109058324B|2018-09-18|2020-05-01|广德县辉达电器有限公司|Thin brake|
    GB2584267B|2018-10-02|2021-08-04|Taylor Kerr Couplings Ltd|Pipe clamp|
    US11255473B2|2018-11-06|2022-02-22|Mueller International, Llc|Gasket bridge|
    CN109595409B|2018-12-14|2020-12-11|徐州华显凯星信息科技有限公司|Mould connects explosion-proof leak protection structure of high pressure fuel pipe joint|
    法律状态:
    2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-03-19| B06T| Formal requirements before examination|
    2020-05-12| B09A| Decision: intention to grant|
    2020-10-06| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 20/01/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US29693910P| true| 2010-01-21|2010-01-21|
    US61/296939|2010-01-21|
    PCT/US2011/021857|WO2011091135A2|2010-01-21|2011-01-20|Gasketed pipe clamp|
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