• 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:
    COUPLING WITH AN ACCOMMODATION FOR VARIABLE DEPTH SEALING RING A mechanical coupling for joining pipe elements has segments joined end to end, each segment having a housing of variable depth to receive the sealing ring. The variable depth of the housing is used to control the distortion of the seal ring between a round shape and a non-round shape when the segments are arranged in a spacing relationship around the seal ring, the spacing between the segments being sufficient to allow the insertion of the piping elements without disassembling the coupling.
    公开号:BR112014012280B1
    申请号:R112014012280-6
    申请日:2012-10-26
    公开日:2020-10-27
    发明作者:Douglas R. Dole；Philip W. Bancroft；Frank J. Cygler Iii
    申请人:Victaulic Company；
    IPC主号:
    专利说明:

    Cross-Reference to Correlated Request
    [001] This application is an international application claiming priority to U.S. utility patent application No. 13 / 300,861, filed on November 21, 2011, hereby incorporated herein by reference in its entirety for reference. Field of the Invention
    [002] The present invention relates to mechanical couplings for joining pipe elements in an end-to-end relationship. Background
    [003] Mechanical couplings for joining pipe elements together end to end comprise interconnectable segments that are positionable in circumference surrounding the end portions of coaxially aligned pipe elements. The term "pipe element" is used throughout this document to describe any tube-like item or component having a tube-like shape. Piping elements include the piping itself, piping fittings such as knees, caps and T-joints as well as fluid control components such as valves, reducers, filters, restrictors, pressure regulators and the like.
    [004] Each mechanical coupling segment comprises a housing that has projections that extend radially into the housing and engage, for example, with external surfaces of single-ended pipe elements, pipe elements that have a shoulder and cord, or circumferential grooves extending around each of the pipe elements to be joined. The engagement between the projections and the piping elements provides mechanical containment to the joint and ensures that the piping elements remain coupled even under high internal pressure and high external forces. The housings define an annular channel or housing that typically receives an elastomeric ring from the gasket or seal that engages with the ends of each pipe element and cooperates with the segments and pipe elements to provide a fluid tight seal. The segments have connecting elements typically in the form of projections protruding out of the housings. The projections are adapted to receive fasteners, such as nuts and bolts that can be adjusted in an adjustable way to attract the segments to each other.
    [005] Projections in prior art couplings typically had arched surfaces with a radius of curvature that was substantially corresponding to the radius of curvature of the outer surface of the pipe element with which it should engage. For couplings used with grooved pipe elements, the radii of curvature of the arcuate surfaces are less than the radii of curvature of the outer surfaces of the pipe elements outside the grooves, so that the projections fit into the grooves and engage with they.
    [006] The methods of securing piping elements in an end-to-end relationship comprise a sequence installation process when mechanical couplings according to the prior art are used. Typically, the coupling is received by the technician with the segments fixed to each other with the seal ring captured within the channels of the segments. The technician first disassembles the coupling by removing the bolts, removes the seal ring, lubricates it (if not previously lubricated) and places it around the ends of the pipe elements to be joined. Installing the seal ring often requires it to be lubricated and stretched to accommodate the piping elements. With the gasket in place on the two pipe elements, the segments are then placed one at a time overlapping the ends of the pipe elements and capturing the gasket between them. During placement, the segments engage with the sealing ring, the projections are aligned with the grooves, the pins are inserted through the protrusions, the nuts are screwed on the pins and tightened, pulling the coupling segments together, compressing the seal and then engaging the projections with the grooves.
    [007] As is evident from the description above, the installation of mechanical piping coupling according to the prior art requires that a technician typically manipulate at least seven components of individual parts (and more when the coupling has more than two segments), and you must completely disassemble and reassemble the coupling. A significant amount of time, effort and expense would be saved if the technician could install a mechanical pipe coupling without having to completely disassemble it first and then reassemble it, piece by piece.
    [008] Figure 1 shows a coupling 11 having coupling segments 13 and 15. The segments are joined end to end by connection elements 17 and 19, including threaded fastening connection elements 21. Segments 13 and 15 are shown as being supported in a spaced relationship with each other on the outer surface of the seal ring 23 captured between the segments. This configuration is possible due to the fact that the circumference of the outer surface of a non-deformed seal ring 23 is greater than the sum of the circumferences of the surfaces over the segments with which the outer surface of the seal ring interfaces. When the segments are supported in this way, it is possible to insert piping elements in the central space 25 between the segments without disassembling the coupling. However, there are some drawbacks to this solution to the problem of installing mechanical couplings. It is especially noted that the seal ring 23 is distorted in an oval shape by the geometry of a closely fitting segment disposed on at least a portion of the seal ring before the seal has properly seated in the segment seal housing. If the degree of distortion of the seal ring is not controlled, the oval shape can result in bending and damage to the seal in the region between connecting elements 17 and 19 of segments 13 and 15.
    [009] There is clearly a need for a pipe coupling such that the distortion of the sealing ring can be controlled, in order to avoid damage to the sealing ring with which it is used, but which will also allow the pipe elements are inserted reliably without the need to disassemble the coupling. summary
    [0010] The invention relates to a coupling for joining end-to-end pipe elements. In an exemplary embodiment, the coupling comprises a plurality of segments joined end to end surrounding a central axis and defining a central space for receiving the pipe elements. At least one of the segments comprises a pair of projections positioned in a spaced relation to each other on opposite sides of the segment and extending in the direction of the central axis. At least a portion of each of the projections can be coupled with a respective element of the piping elements. Each of the projections has an arched surface facing the central axis. The arcuate surface has a first radius of curvature measured from a first center of curvature. A rear wall extends between the projections. The rear wall has an arched surface facing the central axis. The arched surface of the rear wall has a second radius of curvature measured from a second center of curvature. The second center of curvature does not coincide with the first center of curvature as measured in a plane perpendicular to the central axis.
    [0011] In one embodiment, the first center of curvature is closer to the arched surface of the rear wall than the second center of curvature when measured to a point on the arched surface of the rear wall which is collinear with the first and the second center curvature. In another embodiment, the first and second center of curvature and the point on the rear wall are collinear along a first line oriented perpendicular to a second line that extends between a first end of a segment and a second end of a segment .
    [0012] The second center of curvature may be offset from the first center of curvature from a distance of approximately 0.01 inch (0.0254 cm) to approximately 0.1 inch (0.254 cm), or from a distance of approximately 0, 02 inches (0.0508 cm) to approximately 0.04 inches (0.1016 cm), or from a distance of approximately 0.03 inches (0.0762 cm).
    [0013] In a special exemplary form of Coupling, according to the invention, only a first and a second of the segments are connected end to end surrounding the central axis. In this example, the coupling further comprises a sealing ring positioned between the first and the second segment. The sealing ring supports the first and second segments in a spacing relationship with each other sufficient for the insertion of the piping elements between the segments and can be shaped that is distorted into an oval, or that is substantially undistorted and has a shape Circular. The degree of distortion of the seal ring is determined by the displacement of the first and second centers of curvature.
    [0014] Another exemplary embodiment of a coupling for joining pipe elements in an end-to-end relationship according to the present invention comprises a plurality of end-to-end segments surrounding a central axis and defining a central space for receiving the pipe elements. In this exemplary embodiment, at least one of the segments comprises a pair of projections positioned in a spaced relation to each other on opposite sides of the segment. The projections extend in the direction of the central axis. At least a portion of each of the projections can be coupled with a respective element of the piping elements. At least one of the projections has an arched surface facing the central axis. A rear wall extends between the projections. The rear wall has an arched surface facing the central axis. The distance between the arcuate surface of the rear wall and the arcuate surface of at least one projection, as measured along a line radiating outward and extending from the central axis, is a first value at a first midpoint between the ends at least one segment, and a second value at a second point in the vicinity of at least one end of the at least one segment. The first value is less than the second value. A sealing ring is positioned in the central space defined by the segments. The sealing ring has an outer circumference that is longer than the sum of the lengths of the arched surfaces of the rear walls of the segments. The sealing ring supports at least two of these segments in a spacing relationship with each other.
    [0015] The distance between the arched surface of the rear wall and the arched surface of at least one projection can reach a minimum at the first midpoint between the ends of at least one segment and reach a maximum at the second point. The second point can be positioned at at least one end of the at least one segment. The distance between the arcuate surface of the rear wall and the arcuate surface of the at least one projection at a third point positioned at another end of the at least one segment can be of a third value approximately equal to the second value.
    [0016] In a special exemplary embodiment, the arched surface of the rear wall comprises a first portion that has a curved surface, and a second portion having a curved surface. The second portion is positioned in proximity to at least one end of the at least one segment. Any point in the second portion is at a greater distance from the central axis than any point in the first portion. The arcuate surface of the rear wall may further comprise a third portion having a curved surface. The third portion is positioned in proximity to another end of the at least one segment. Any point in the third portion is at a greater distance from the central axis than any point in the first portion.
    [0017] The second portion of the arched surface of the rear wall can subtend an angle having approximately 5 ° to approximately 80 °, or from approximately 5 ° to approximately 45 °. The third portion of the arched surface of the side wall may subtend an angle ranging from approximately 5 ° to approximately 80 °, or from approximately 5 ° to approximately 45 °.
    [0018] In another exemplary form of a Coupling, according to the invention, the arched surface of the rear wall comprises a first portion that has a first radius of curvature, and a second portion that has an infinite radius of curvature. The second portion is positioned in the vicinity of at least one end of the at least one segment. Any point in the second portion is at a greater distance from the central axis than any point in the first portion. The arched surface of the rear wall may further comprise a third portion which has an infinite radius of curvature. Any point in the third portion is at a greater distance from the central axis than any point in the first portion. The third portion is positioned in proximity to another end of the at least one segment. The second portion of the arched surface of the rear wall may subtend an angle ranging from approximately 5 ° to approximately 45 °, or from approximately 5 ° to approximately 30 °. The third portion of the arched surface of the rear wall may subtend an angle having approximately 5 ° to approximately 45 ° or approximately 5 ° to approximately 30 °. In another exemplary embodiment, the arcuate surface of the rear wall can further comprise a multiplicity of second portions of the arcuate surface of the rear wall, each of the second portions having infinite radii of curvature. In addition, the arched surface of the rear wall may further comprise a plurality of third portions of the arched surface of the rear wall, each having an infinite radius of curvature. The third portions of the arched surfaces of the rear wall are positioned in proximity to the other end of the at least one segment. The multiplicity of second portions of the arched surface of the rear wall can subtend an angle ranging from approximately 5 ° to approximately 80 °, or from approximately 5 ° to approximately 30 °. The multiplicity of third portions of the arched surface of the rear wall can subtend an angle of approximately 5 ° to approximately 80 °, or from approximately 5 ° to approximately 30 °.
    [0019] In an exemplary embodiment, a Coupling, according to the invention can comprise only a first and a second of the segments joined end to end surrounding the central axis. The coupling may further comprise a sealing ring positioned between the first and the second segment. The sealing ring supports the first and second segments in a spacing relationship with each other that is sufficient for the insertion of the piping elements between the segments. The sealing ring can be oval in shape or the sealing ring can be circular in shape. Short Description of the Drawings
    [0020] Figure 1 is an elevation view of an exemplary mechanical coupling for piping, according to the invention; Figure 2 is an elevation view of an example of an exemplary mechanical coupling for piping according to the invention; Figure 3 is a cross-sectional view of a segment of an exemplary mechanical coupling for piping according to the invention; - Figure 4 is a cross-sectional view of the segment of an exemplary mechanical coupling for piping taken on line 4-4 of Figure 3; Figure 5 is a cross-sectional view of a segment of an exemplary mechanical coupling for piping according to the invention; Figure 6 is a cross-sectional view of a segment of an exemplary mechanical coupling for piping according to the invention; and - Figure 7 shows a partial cross-sectional view of an exemplary segment on an enlarged scale. Detailed Description
    [0021] Figure 2 shows an exemplary embodiment of a coupling 10 according to the invention. The coupling 10 comprises segments 12 and 14 which are joined together end to end surrounding the central axis 16 and defining a central space 18. The central space 18 receives the piping elements to be joined in an end-to-end relationship, aligning the longitudinal axis of the pipe elements substantially as a central axis 16. Each of the segments 12 and 14 has connecting elements 20 and 22 at each end. In this example, the connecting elements comprise a projection 24 that protrudes from the segment and receives a threaded fastener 26. The fasteners 26 can be tightened in an adjustable way to pull the segments 12 and 14 towards each other and towards the central axis. 16 to engage with the piping elements to form the joint. The segments 12 and 14 are previously assembled at the factory in a sufficient spacing ratio to allow the insertion of the pipe elements in the central space 18 without having to disassemble the coupling.
    [0022] As shown in cross section in Figure 4, each segment (segment 12 being shown) has a pair of projections 28 and 30 positioned in a spacing relation to each other on the opposite sides of the segment. The projections extend in the direction of the central axis 16, and at least a portion of each projection is interlockable with a respective pipe element to provide a mechanical engagement and to maintain the pipe elements in an end-to-end relationship. The projections 28 and 30 engage the outer surface of the pipe elements, which may consist of a simple surface, a surface that forms a circumferential groove, or a surface that has a raised shoulder, or a shoulder and a bead, for example. The projections can have one or more notches 31 (see Figure 2) positioned adjacent to the connection elements 20 and 22 to facilitate the insertion of the pipe elements in the central space 18. As shown in Figures 3 and 4, each projection has an arcuate surface 32 facing the central axis 16. The arcuate surface 32 of each projection has a radius of curvature 34 measured from a center of curvature 35 of the arcuate surface.
    [0023] The segments 12 and 14 also have side walls 36 and 38 from which the projections 28 and 30 extend. The side walls 36 and 38 are fixed to a rear wall 40 and together the side walls and the rear wall define a housing 42. Housing 42 receives a seal ring 43 (Figure 4) positioned between segments 12 and 14 (see Figure 2) to ensure a fluid tight seal. In this exemplary coupling, it is the sealing ring that supports segments 12 and 14 in a spacing relationship with each other when assembled. The rear wall 40 extends between the projections 28 and 30 and, as shown in Figures 3 and 4, has an arcuate surface 44 that faces the central axis 16. The arcuate surface of the rear wall 44 has a measured radius of curvature 46 from a center of curvature 48 of the arched surface of the rear wall. When observed or measured in the plane 50 oriented perpendicularly to the central axis 16 of the coupling 10, the center of curvature 35 of the arched surfaces 32 in the projections 28 and 30 does not coincide with the center of curvature 48 of the arched surface 44 of the rear wall 40. In the example shown in Figure 3, the centers of curvature 35 are closer to the arched surface of the rear wall 40 than the center of curvature 48 of the arched surface 44 of the rear wall when measured to point 52 on the arched surface 48 of the rear wall, which is collinear with the centers of curvature 35 and 48, as shown by linear segment 54. As shown in more detail in Figure 3, the centers of curvature 35 and 48 and point 52 on the arched surface 44 of the rear wall are collinear along the line 54 which is oriented perpendicularly to a second line 55 which extends between ends 56 and 58 of segments 12 and 14 (only segment 12 is shown).
    [0024] The displacement distance 60 between the center of curvature 35 and the center of curvature 48 results in an eccentric shaped seal housing 42 with variable depth, extending the arcuate surface 44 of the rear wall a greater distance outward from a true circle as you proceed along the rear wall from the middle of segment 12 and towards either end 56 or 58. If depth 62 of housing 42, measured from the arcuate surface 32 of the projection and until the arched surface 44 of the rear wall has the value "h" in the middle of the segment, then the depth 62a at each end 56, 58 of the segment 12 is approximately "h" (62) + the travel distance 60. Depth 62 can be defined as the distance between the arcuate surface 32 of the projection 30 and the arcuate surface 44 of the rear wall 40 measured along a radially protruding line extending from the central axis 16. Ne In this exemplary embodiment, this distance, depth 62 varies from a value of h at a point between the ends 56 and 58 of the segment 12, and a greater value, h miss displacement, at the points at each end of the segment. This increased depth, located at the ends of the segments, provides an outer radial space for the seal at the ends of the segments, which, due to the geometric shape of the seal 43 and the housing for the seal 42, would normally come into contact with the seal and the would distort the circular shape, as shown in Figure 1. However, as the seal housing 42 is eccentric, with its eccentricity of distance h + displacement at most at the ends 56 and 58 of segments 12 and 14 (being at least " h "halfway between the ends), the contact between the arched surface 44 of the rear wall 40 and the outer surface 65 of the sealing ring 43 can be controlled, thus controlling the degree of distortion of the sealing ring of the circular shape when the coupling 10 is assembled at the factory with segments 12 and 14 supported in a spacing relationship on the outer surface 64 of the sealing ring 43, so that the pipe elements can m be inserted into the central space 18 without the need to disassemble the coupling. It is possible to support segments 12 and 14 in spacing, as the circumference of the outer surface 64 of a seal ring 43 without having been deformed is greater than the sum of the circumferences of the arched surfaces 44 of segments 12 and 14 with the the outer surface of the sealing ring 64 interfaces. The degree of distortion of seal ring 43 can be varied from substantially no distortion, resulting in the circular shape shown in Figure 2, to an oval shape as shown for seal ring 23 in Figure 1. As the travel distance 6 0 increases. The degree of ovalness of the seal ring decreases. Although it is possible to substantially eliminate all distortion of the seal ring, for practical projects it is sometimes advantageous to provide a controlled degree of distortion. An advantage is obtained when the degree of distortion is such that the sealing ring is not bent while maintaining sufficient eccentricity, so that the sealing ring grabs one end of the pipe and holds it in the element of piping as it is inserted into the central space. This allows for convenient assembly of the pipe joint, as the technician does not need to clamp the coupling and the first pipe element together while he handles the second pipe element to engage with the coupling. Displacement distances 60 of approximately 0.01 inch (0.0254 cm) to approximately 0.1 inch (0.254 cm) have been found to be practical for suitable couplings for pipe elements having a nominal outside diameter of ten inches (25.4 cm) or less. The travel distance can also vary from approximately 0.02 inch (0.0508 cm) to approximately 0.04 inch (0.1016 cm), with a travel distance of approximately 0.03 inch (0.0762 cm).
    [0025] Figures 5 and 6 illustrate the respective segments 66 and 68 where the distance 62 between the arcuate surface 32 of the projection 30 and the arcuate surface 44 of the rear wall 40, as measured along a line 70 projecting radially and extends from the central axis 16, it is smaller at a point 72 in the middle between the ends 56 and 58 of segments 6 6 and 6 8 than at a point 74 in the vicinity of one end.
    [0026] For segment 66, shown in Figure 5, the arcuate surface 44 of the rear wall 40 comprises a first portion of surface 76 that has a first radius of curvature 78 and a second portion of surface 80 positioned near the end 56 of the segment 66, which has a second radius of curvature 82. Any point on the second surface portion 80 is at a greater distance from the central axis 16 than any point on the first portion 78. Thus the distance 62 between the arcuate surface 32 of the projection 30 and the arcuate surface 44 of the rear wall 40 is smaller on angle 84 subtended by the first surface portion 76 than on angle 86 subtended by the second surface portion 80. The second surface portion 80 can subtend an angle 86 of approximately 5o at approximately 80 °. An subtended angle of approximately 5 ° to approximately 45 ° is also practical.
    [0027] In this example, the arcuate surface 44 further comprises a third portion of surface 88 located at the opposite end 58 of segment 66. The third portion of surface 88 has a radius of curvature 90. (The respective radii of curvature 82 and 89 of second surface portion 80 and third surface portion 88 may be the same). Any point on the third surface portion 88 is at a greater distance from the central axis 16 than any point on the first portion 78. Thus the distance 62 between the arcuate surface 32 of the projection 30 and the arcuate surface 44 of the rear wall 40 is less about the angle 84 subtended by the first surface portion 76 than the angle 92 subtended by the third surface portion 88. The third surface portion 88 can subtend an angle 92 that ranges from approximately 5 ° to approximately 80 °. An subtended angle of approximately 5 ° to approximately 45 ° is also practical.
    [0028] Note that the distances 62 and the differences between the radii of curvature are exaggerated for the sake of clarity. Although the geometric relationships between the arcuate surfaces 32 and 44 are described for a projection 30 on a segment 66, it should be understood that each segment comprising a coupling can have two such projections on opposite sides of the segment, as shown in Figure 4 and that the geometric relationship between the arched surfaces in the two projections and the arched surface of the rear wall can be the same.
    [0029] For segment 68 shown in Figure 6, the arcuate surface 44 of the rear wall 40 comprises a first portion of surface 94 that has a first radius of curvature 96, and a second portion of surface 98 positioned near the end 56 of the segment 66. The second surface portion 98 has an infinite radius of curvature, meaning that the second surface portion is a flat facet 100. Facet 100 is arranged in such a way that the distance 62 between the arcuate surface 32 of the projection 30 and the arcuate surface 44 of the rear wall 40 is smaller on the angle 102 subtended by the first surface portion 94 than on the angle 104 subtended by the second surface portion 98, this being facet 100. The second surface portion 98 may subtend an angle 104 ranging from approximately 5 ° to approximately 45 °. A subtended angle ranging from approximately 5 ° to approximately 30 ° is also practical.
    [0030] In this example, the arcuate surface 44 further comprises a third portion of surface 106 located at the opposite end 58 of segment 68. In this example, the third portion of surface 106 also has an infinite radius of curvature, thus forming a facet 108. Facet 108 is arranged in such a way that the distance 62 between the arcuate surface 32 of the projection 30 and the arcuate surface 44 of the rear wall 40 is less on angle 102 subtended by the first portion of surface 94 than on angle 110 subtended by the third surface portion 106. The third surface portion 88 can subtend an angle 110 ranging from approximately 5 ° to approximately 45 °. A subtended angle ranging from approximately 5 ° to approximately 30 ° is also practical. Although each of the portions, the second and third surface portion 98 and 106 of segment 68, is formed by single facets 100 and 108, it is advantageous to form a multiplicity of facets close to each end of segment 68. An example of this structure multifaceted is shown in an enlarged scale in Figure 7, where the surface 44 of segment 68 consists of a multiplicity of second surface portions 98a, 98b, 98c, each having an infinite radius of curvature and forming the respective facets 100a, 100b, 100c. The multiplicity of surface portions 98a, 98b, 98c can subtend an angle 112 having approximately 5 ° to approximately 80 °. A subtended angle of approximately 5 ° to approximately 30 ° is also practical.
    [0031] Note that distances 62 are exaggerated for the sake of clarity. Although the geometric relationships between the arcuate surfaces 32 and 44 are described for a projection 30 on a segment 68, it should be understood that each segment comprising a coupling can have two such projections on opposite sides of the segment, as shown in Figure 4, and that the geometric relationship between the arched surfaces in the two projections and the arched surface of the rear wall can be the same.
    [0032] The housing of the variable depth seal, which allows the distortion of the seal ring to be controlled, provides several advantages over the prior art coupling segments that have housings in which the depth is constant. When the coupling is assembled at the factory, the seal can have a controlled shape between oval and circular. Choosing the configuration in which the sealing ring has less distortion means that when the pipe element is inserted in the central space, it will engage the pipe stop inside the seal more evenly, thus promoting a proper seating of the pipe elements on the coupling. In addition, for a seal ring with less distortion, there is less likelihood of the seal bending between the ends of the coupling segments. However, the induction of a reasonable degree of distortion in the shape of the seal ring allows it to grip and stick to the piping element during assembly, which is an advantage for the technician.
    [0033] The variable depth seal housing described above and claimed by this document is applicable to both rigid and flexible couplings. Rigid couplings are used to advantage with piping elements with circumferential grooves. The rigid coupling segments have interface surfaces that have angular orientations opposite one another. When the fasteners that join these segments together are fastened to the interface surfaces on a segment they come into contact with their corresponding surfaces on the complementary segment and the segments are forced to rotate around a vertical axis in opposite directions from one another. This forces the projections to engage the side walls of the circumferential groove of the pipe elements and lock them in place, in order to provide significant resistance to external bending forces and the torque applied to the joint, thus limiting the relative deflections of the elements of piping. Examples of rigid couplings are shown in the present document in Figures 1, 2, 5 and 6. Rigid couplings are disclosed in US Patent No. 4,611,839 and in US Patent No. 4,639,020, both of which are incorporated herein by way of reference.
    [0034] In a flexible coupling, the surfaces that interface between the segments are not inclined and when they engage with each other they do not produce any relative rotation of the segments. Thus the projections do not engage the side walls of the circumferential groove due to the twisting action of the segments which results in a more flexible joint in which the relative deflections of the pipe elements when flexing, with twist or axially, are greater than for the joint rigid (described above) for the same applied loads. Figure 3 shows an exemplary flexible coupling.
    [0035] The variable depth seal housing described above and claimed in this document is also applicable to couplings with adapters that allow piping elements of different nominal sizes to be coupled in an end-to-end relationship. In couplings with adapters each segment has projections of different radii of curvature paired to fit and engage a differently sized pipe element. Examples of couplings with adapters used to couple grooved tubing elements are described in U.S. Patent No. 3,680,894 and U.S. Patent No. 4,896,902, both of which are incorporated herein by reference.
    [0036] The pipe couplings according to the present invention allow non-deforming couplings to be used as couplings ready for installation and that require less energy to be installed, as there is no significant energy expended to deform the couplings when the pipe joint is made. This corresponds to less fatigue when forming joints manually with hand tools, as well as less frequent battery changes when using cordless power tools.
    权利要求:
    Claims (41)
    [0001]
    1. Coupling (10) for joining piping elements in an end-to-end relationship, characterized by the fact that at least one comprises: - a plurality of segments (12, 14) joined end to end surrounding a central axis (16) and defining a central space (18) to receive the piping elements, at least one of the segments (12, 14) defining an eccentrically molded seal housing (42), said at least one segment comprising: - a pair of projections ( 28, 30) positioned in a spacing relation to each other on opposite sides of said segment and extending in the direction of said central axis, at least a portion of each of the projections being coupled with a respective pipe element of said elements piping, with at least one of these projections having an arcuate surface (32) facing the central axis; - a rear wall (40) extending between the projections and eccentric to said at least one projection as manifested by said rear wall having an arched surface (44) facing the central axis, a distance (66) between said arched surface of the rear wall and the arcuate surface of the at least one projection, as measured along a line (54) projecting radially from the central axis, with a first value at a first medium point (52) between the ends (56, 58) of said at least one segment, said distance between the arcuate surface of the rear wall and the arcuate surface of at least one projection being a second value (62a) at a second point proximal to at least one of the ends (56) of the said at least one segment, and said distance between the arcuate surface of the rear wall and the arcuate surface of at least one projection being a third value (62a) at a third point proximal to at least another end of the d its ends (58) of the at least one segment, the first value being less than the second value and the third value; and a sealing ring (43) positioned in the central space, this sealing ring having an outer circumference (64) that is longer than the sum of the lengths of the arched surfaces of the rear walls of the segments, the sealing ring that supports the minus two of said segments in a spacing relationship with each other; the eccentrically shaped seal housing controlling a degree of distortion of the circular shape of said seal ring.
    [0002]
    2. Coupling (10), according to claim 1, characterized by the fact that said distance is a minimum in said first midpoint between said ends of said at least one segment.
    [0003]
    Coupling (10) according to claim 2, characterized by the fact that said distance is a maximum at said second point, said second point being positioned at least on said at least one end of said at least one segment.
    [0004]
    4. Coupling (10), according to claim 3, characterized by the fact that said third value is approximately equal to said second value.
    [0005]
    5. Coupling (10) according to claim 1, characterized by the fact that it comprises only a first and a second of said segments joined end to end surrounding said central axis (16).
    [0006]
    Coupling (10) according to claim 5, characterized by the fact that said sealing ring (43) has an oval shape.
    [0007]
    Coupling (10) according to claim 5, characterized by the fact that said sealing ring (43) has a circular shape.
    [0008]
    Coupling (10) according to claim 1, characterized by the fact that: - said arcuate surface (32) of said at least one projection has a first radius of curvature measured from the first center of curvature; - said arched surface (44) of said rear wall having a second radius of curvature measured from a second center of curvature, the second center of curvature not coinciding with said first center of curvature, as measured in a perpendicular plane to said central axis (16).
    [0009]
    Coupling (10) according to claim 8, characterized by the fact that the first center of curvature is closer to the arcuate surface (44) of the rear wall than the second center of curvature when measured to a point on the arcuate surface of said rear wall which is collinear with the first and the second center of curvature.
    [0010]
    Coupling (10) according to claim 9, characterized by the fact that the first and second center of curvature and the point on the rear wall are collinear along a first line oriented perpendicularly to a second line extending between a first end of said a segment and a second end of said a segment.
    [0011]
    Coupling (10) according to claim 10, characterized by the fact that the second center of curvature is offset from the first center of curvature by a distance of approximately 0.01 inch (0.0254 cm) to approximately 0.1 inch (0.254 cm).
    [0012]
    Coupling (10) according to claim 10, characterized by the fact that the second center of curvature is offset from the first center of curvature by a distance of approximately 0.02 inch (0.0508 cm) to approximately 0.04 inch (0.1016 cm).
    [0013]
    Coupling (10) according to claim 10, characterized by the fact that the second center of curvature is offset from the first center of curvature by a distance of approximately 0.03 inches (0.0762 cm).
    [0014]
    Coupling (10), according to claim 10, characterized by the fact that it comprises only a first and a second of the segments joined end to end surrounding the central axis (16).
    [0015]
    15. Coupling (10) according to claim 14, characterized by the fact that the sealing ring (43) has an oval shape.
    [0016]
    16. Coupling (10) according to claim 14, characterized by the fact that the sealing ring (43) has a circular shape.
    [0017]
    17. Coupling (10) for joining pipe elements in an end-to-end relationship, characterized by the fact that it comprises: a plurality of segments (68) joined end to end surrounding a central axis (16) and defining a central space ( 18) to receive said tubing elements, at least one of said segments comprising: - a pair of projections (28, 30) positioned in a spacing relation with each other on opposite sides of said one segment and extending towards the central axis, at least a portion of each of said projections being coupled with a respective pipe element of said pipe elements, with at least one of these projections having an arched surface (32) facing the central axis; - a rear wall (40) extending between the projections, the rear wall having a surface (44) facing the central axis, the surface of said rear wall comprising a first portion of the surface (94) having a first radius of curvature ( 96), and a second portion of the surface (98) having an infinite radius of curvature, said second portion of the surface being positioned proximal to an end (56) of said at least one segment (68), any point on said second portion from the surface being further from the central axis than any point on said first portion of the surface, a distance (62) between said surface of said rear wall and said arcuate surface of said at least one projection, as measured over a line (70) projecting radially extending from the central axis, with a first value (72) at a first midpoint between the ends (56, 58) of said at least one segment, and a second value in a second pont the proximal of at said end of said at least one segment, said first value being less than said second value; and a sealing ring (43) positioned in the central space, said sealing ring having an outer circumference (64) having a length greater than the sum of the lengths of said surfaces of said rear walls of said segments, said ring of seal supporting at least two segments in a spacing relationship.
    [0018]
    18. Coupling (10) according to claim 17, characterized by the fact that the distance between the surface of the rear wall and the arched surface of at least one projection at a third point positioned close to another of said ends of said at least a segment is a third value equal to the second value.
    [0019]
    19. Coupling (10) according to claim 18, characterized by the fact that said surface of said rear wall further comprises a third portion of surface having an infinite radius curvature, said third portion of surface being positioned proximal to said another end of said ends of said at least one segment.
    [0020]
    20. Coupling (10) according to claim 17, characterized by the fact that the second surface portion subtends an angle of approximately 5 ° to approximately 45 °.
    [0021]
    21. Coupling (10) according to claim 17, characterized by the fact that the second portion of this surface subtends an angle of approximately 5 ° to approximately 30 °.
    [0022]
    22. Coupling (10) according to claim 19, characterized by the fact that said third surface portion subtends an angle of approximately 5 ° to approximately 45 °.
    [0023]
    23. Coupling (10) according to claim 19, characterized by the fact that said third surface portion subtends an angle of approximately 5 ° to approximately 30 °.
    [0024]
    24. Coupling (10) according to claim 17, characterized by the fact that it further comprises a plurality of second portions of this surface, each of the second portions having infinite radii of curvature.
    [0025]
    25. Coupling (10) according to claim 24, characterized by the fact that said surface of said rear wall further comprises a plurality of third portions of surface having infinite radius of curvature, said third portions of surface being positioned proximal to another end of said ends of said at least one segment.
    [0026]
    26. Coupling (10) according to claim 24, characterized by the fact that said plurality of said second surface portions subtends an angle of approximately 5 ° to approximately 45 °.
    [0027]
    27. Coupling (10) according to claim 24, characterized by the fact that said plurality of said second surface portions subtends an angle of approximately 5 ° to approximately 30 °.
    [0028]
    28. Coupling (10) according to claim 25, characterized by the fact that said plurality of said third surface portions subtends an angle of approximately 5 ° to approximately 45 °.
    [0029]
    29. Coupling (10) according to claim 25, characterized by the fact that said plurality of said third surface portions subtends an angle of approximately 5 ° to approximately 30 °.
    [0030]
    30. Coupling (10) according to claim 17, characterized by the fact that it comprises only a first and a second of said segments joined end to end surrounding the central axis (16).
    [0031]
    31. Coupling (10) according to claim 30, characterized by the fact that the sealing ring has an oval shape.
    [0032]
    32. Coupling (10) according to claim 30, characterized by the fact that the sealing ring has a circular shape.
    [0033]
    33. Coupling (10) for joining piping elements in an end-to-end relationship, characterized by the fact that it comprises: a plurality of segments (12, 14) joined end to end surrounding a central axis (16) and defining a space central (18) to receive the piping elements, at least one of said segments comprising: a pair of projections (30) positioned in a spacing relation with each other on opposite sides of said segment and extending in the direction of the central axis at least a portion of each of said projections being coupled with a respective pipe element of said pipe elements, each of these projections having an arcuate surface (32) facing the central axis, the arcuate surface having a first radius of curvature (34) measured from a first center of curvature (35); - a rear wall (40) extending between the projections, the rear wall having an arcuate surface (44) facing the central axis, the arcuate surface of the rear wall having a second radius of curvature (46) measured from one second center of curvature (48), said second center of curvature being not coincident with said first center of curvature as measured in a plane perpendicular to the central axis.
    [0034]
    34. Coupling (10) according to claim 33, characterized by the fact that the first center of curvature is closer to the arched surface of the rear wall than the second center of curvature when measured to a point on the arched surface of the rear wall which is to collinear with the first and the second center of curvature.
    [0035]
    35. Coupling (10) according to claim 34, characterized by the fact that the first and second center of curvature and the point on the rear wall are collinear along a first line oriented perpendicular to a second line extending between a first end of said a segment and a second end of said a segment.
    [0036]
    36. Coupling (10) according to claim 35, characterized by the fact that the second center of curvature is offset from the first center of curvature by a distance of approximately 0.01 inch (0.0254 cm) to approximately 0.1 inch (0.254 cm).
    [0037]
    37. Coupling (10) according to claim 35, characterized by the fact that the second center of curvature is offset from the first center of curvature by a distance of approximately 0.02 inch (0.0508 cm) to approximately 0.04 inch (0.1016 cm).
    [0038]
    38. Coupling (10) according to claim 35, characterized by the fact that the second center of curvature is offset from the first center of curvature by a distance of approximately 0.03 inches (0.0762 cm).
    [0039]
    39. Coupling (10) according to claim 35, characterized in that it comprises only a first and a second of said segments joined end to end surrounding the central axis (16), the coupling further comprising a sealing ring positioned between said first and second segment, said sealing ring having an outer circumference having a length greater than the sum of the lengths of said arched surfaces of said rear walls of said first and second segments, said sealing ring supporting said first and second segment in a spaced relation.
    [0040]
    40. Coupling (10) according to claim 39, characterized by the fact that the sealing ring has an oval shape.
    [0041]
    41. Coupling (10) according to claim 39, characterized by the fact that the sealing ring has a circular shape.
    类似技术:
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    BR112014012280B1|2020-10-27|coupling for joining pipe elements in an end-to-end relationship
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    同族专利:
    公开号 | 公开日
    EP2783145A4|2015-03-25|
    TW201335522A|2013-09-01|
    KR20140101736A|2014-08-20|
    EP3051197B1|2019-12-18|
    IL244217A|2020-08-31|
    US9395024B2|2016-07-19|
    TR201802742T4|2018-03-21|
    EP3051197A1|2016-08-03|
    EP2851599B1|2017-12-27|
    PL3051197T3|2020-06-15|
    IL232643D0|2014-06-30|
    IL260522A|2020-08-31|
    ES2664100T3|2018-04-18|
    EP2783145B1|2017-04-12|
    TW201636530A|2016-10-16|
    CN104204640B|2017-03-22|
    AU2017201945A1|2017-04-13|
    IL232643A|2017-09-28|
    AU2012340977B2|2017-05-04|
    TWI558938B|2016-11-21|
    AU2012340977A1|2014-05-29|
    EP2783145A1|2014-10-01|
    PL2851599T3|2018-06-29|
    SG11201402496RA|2014-10-30|
    BR112014012280A2|2017-05-30|
    CN104204640A|2014-12-10|
    JP2018021679A|2018-02-08|
    IL244217D0|2016-04-21|
    MX2014006097A|2014-06-23|
    JP6243981B2|2017-12-06|
    JP6422556B2|2018-11-14|
    IL260519A|2020-08-31|
    TWI583883B|2017-05-21|
    ES2791331T3|2020-11-03|
    MX348080B|2017-05-25|
    JP6027623B2|2016-11-16|
    US20130127160A1|2013-05-23|
    AU2017201945B2|2018-02-01|
    WO2013077966A1|2013-05-30|
    IN2014CN03752A|2015-07-03|
    ES2632422T3|2017-09-13|
    KR101955924B1|2019-03-08|
    EP2851599A1|2015-03-25|
    US20160319968A1|2016-11-03|
    CA2855983A1|2013-05-30|
    JP2015501908A|2015-01-19|
    HK1205231A1|2015-12-11|
    JP2016205628A|2016-12-08|
    DK3051197T3|2020-02-17|
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    法律状态:
    2017-08-22| B08F| Application fees: dismissal - article 86 of industrial property law|
    2017-09-26| B08G| Application fees: restoration|
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-07-02| B06T| Formal requirements before examination|
    2020-03-24| B07A| Technical examination (opinion): publication of technical examination (opinion)|
    2020-07-14| B09A| Decision: intention to grant|
    2020-10-27| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 26/10/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/300,861|2011-11-21|
    US13/300,861|US9395024B2|2011-11-21|2011-11-21|Coupling having gasket pocket of varying depth|
    PCT/US2012/062148|WO2013077966A1|2011-11-21|2012-10-26|Coupling having gasket pocket of varying depth|
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