• 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:
    BLIND FIXER. A blind fastener (10) including a core screw (12) having a shank (16) with a head (30) and a threaded portion (28), and a sleeve (14) having an elongated body (38) with a head (46), an inner threaded portion (50), and a tapered notch (56) formed within an outer surface (44) thereof and defined by a tapered portion (57) having a slope and an improved frictional surface. The core screw (12) is installed within the sleeve (14) so that the threaded portion (28) threadedly engages the inner threaded portion (50) of the sleeve (14). During installation of the fastener (10) within the various work pieces (24a, 24b), a bulb (55) is formed in the elongated body (38) of the sleeve (14), the bulb (55) defining a part of a part. domed (61). When a selected axial force is reached, the domed portion (61) separates from the elongated body (38) and axially engages the tapered portion (57) of the sleeve (14), increasing the diameter of the bulb (55) that engages a blind side ( 27) of one of the work pieces (24b).
    公开号:BR112014025738B1
    申请号:R112014025738-8
    申请日:2013-04-11
    公开日:2021-05-04
    发明作者:Gerhart Hufnagl；Douglas DeSalvo
    申请人:Arconic Inc；
    IPC主号:
    专利说明:

    CROSS REFERENCE WITH RELATED ORDER
    [001] This application refers to and claims the benefit of co-pending, co-pending U.S. Patent Application No. Serial 61/625,235 entitled "BLIND FASTENER", filed April 17, 2012, the entirety of which is incorporated herein by reference. TECHNICAL FIELD OF THE INVENTION
    [002] The present invention relates to a fastener and more particularly a blind fastener for clamping workpieces together. TECHNICAL BACKGROUND
    [003] Blind fasteners are commonly used to secure multiple work pieces together when it is difficult or impossible to access the blind side of one of the work pieces. In certain applications, it is desirable for domed gloves used in conjunction with such fasteners to have relatively large impressions that engage the blind side of one of the workpieces. DESCRIPTION OF THE INVENTION
    [004] In one embodiment, a blind fastener including a core screw having an elongated shank with a first end and a second end opposite the first end, a head located at the first end and a threaded portion located at the second end; and a glove having an elongate body with a first end, a second end opposite the first end of the elongate body, an outer surface extending from the first end of the elongate body to the second end of the elongate body, a head located at the first end of the body. elongated, an inner threaded portion located at the second end of the elongated body and a tapered notch formed within the outer surface between the first and second ends of the elongated body and defined by a tapered portion, wherein the core screw is adapted to be installed within. of the sleeve such that the threaded portion of the core screw threadedly engages the inner threaded portion of the sleeve, wherein the fastener is adapted to be installed within the openings of a plurality of workpieces, so that the head of the sleeve engages an accessible side of one of the several workpieces, the head of the pin engages the head of the sleeve and the second end The length of the elongated glove body extends from a blind side of another of the workpieces, whereby during installation of the fastener within the various workpieces, a bulb is formed in the elongated glove body, the bulb defining a part of a domed part extending from the bulb to the second end of the elongated body of the sleeve, wherein when a selected axial force applied to the fastener is reached, the domed part separates from the elongated body and thereafter engages the tapered part axially and in a direction of first end of the elongated body, thereby increasing the diameter of the bulb and that when the fastener is in an installed position, the bulb engages the blind side of the other of the workpieces.
    [005] In one embodiment, the core screw includes a second head extending axially from the first head of the core screw and a "breakneck" groove formed between the first and second heads of the core screw and in which when the fastener is in its installed position, the second head is fractured from the first head in the "breakneck" groove.
    [006] In one embodiment, the bulb is formed prior to separating the domed portion from the elongated body. In one embodiment, the sleeve includes an annealed portion to facilitate bulb formation. In one embodiment, the domed portion is adapted to separate from the elongated body near the tapered notch. In one embodiment, the tapered portion includes a frictional enhanced surface that is adapted to inhibit rotation of the dished portion with respect to the elongated body after the dished portion separates from the elongated body. In one embodiment, the improved frictional surface includes serrations. In one embodiment, the improved frictional surface includes wear. In one embodiment, the frictional enhanced surface includes multiple notches.
    [007] In one embodiment, the tapered portion has a slope in a range of about 5 degrees to about 30 degrees. In one modality, the tapered portion has a slope of about 5 degrees. In one modality, the tapered portion has an inclination of about 10 degrees. In one modality, the tapered portion has a slope of about 15 degrees. In one modality, the tapered part has an inclination of about 20 degrees. In one modality, the tapered portion has an inclination of about 25 degrees. In one modality, the tapered part has an inclination of about 30 degrees. In one embodiment, the bulb includes a diameter that is at least one and a half times the diameter of the fastener. In one embodiment, the bulb includes a diameter that is at least twice the diameter of the fastener. BRIEF DESCRIPTION OF THE DRAWINGS
    [008] Figure 1 is a side elevation view, partially in cross-section of a blind fastener constructed in accordance with an embodiment, the fastener being shown in an uninstalled position within a plurality of workpieces and at a length of maximum grip;
    [009] Figure 2 is a side elevation view, partially in cross-section, of a blind fastener shown in Figure 1, the fastener being shown in a position not installed within workpieces, but in a minimum grip length;
    [0010] Figure 3 is a side elevation view, partially in cross-section, of a blind fastener shown in Figure 1 being installed within workpieces during the bulb formation step of a fastener installation sequence;
    [0011] Figure 4 is a side elevation, partially cross-sectional view of a blind fastener shown in Figure 3 being installed within the workpiece during a bulb cutting step of a fastener installation sequence;
    [0012] Figure 5 is a side elevation view, partially in cross section of a blind fastener shown in Figure 4, the fastener being shown in an installed position and a maximum grip length; and
    [0013] Figure 6 is a side elevation view, partially in cross-section, of a blind fastener shown in Figure 2, the fastener being shown in an installed position but with a minimum grip length. BEST WAY TO CARRY OUT THE INVENTION
    [0014] Figure 1 illustrates an embodiment of a blind fastener 10. In one embodiment, the fastener 10 includes a core screw 12 and a cylindrical sleeve 14 that is sized and shaped to receive the core screw 12. In one embodiment, sleeve 14 is of a one piece construction when fastener 10 is at an early stage of an uninstalled position. In one embodiment, the sleeve 14 is adapted to be separated into two parts or segments, which will be described in more detail below. In one embodiment, the core screw 12 includes an elongated shank 16, having a first end 18 and a second end 20 opposite the first end 18 and which is sized and shaped to extend through the sleeve 14. In one embodiment, the sleeve 14 is sized and shaped to be inserted into openings 22a, 22b of a plurality of workpieces 24a and 24b, respectively. In one embodiment, the workpiece 24a includes an accessible side 25, while the workpiece 24b includes a blind side 27 opposite the accessible side 25. In certain embodiments, the workpieces 24a, 24b are made of aluminum, an alloy. aluminum, other metal alloys, compounds or combinations thereof.
    [0015] In one embodiment, the shank 16 includes a smooth cylindrical portion 26 and a threaded portion 28 located at the second end 20 of the shank 16. In one embodiment, the threaded portion 28 of the shank 16 includes a diameter that is less than a diameter of the flat portion 26 of the shank 16. In one embodiment, the core screw 12 includes a first head 30 located at the first end 18 of the shank 16 and adjacent to the flat portion 26. In one embodiment, the first head 30 is of a trunk shape of cone. In one embodiment, adjacent to the first head 30 and also forming a part of the core screw 12 is a frangible second head 32. In one embodiment, the second head 32 includes splines or threads 34 that are engageable by a suitable driver attached to a installation tool (not shown in figures). In one embodiment, the first and second heads 30, 32 are integrally formed. In one embodiment, between the first and second heads 30, 32 is a "breakneck" groove 36 which defines the weakest point of the core screw 12. In one embodiment, the second head 32 is adapted to fracture torsionally or rotationally and separating from the first head 30 in the breakneck groove 36 in twist/rotation cut in response to the rotational force applied to the second head 32 after the fastener 10 has been installed on the workpieces 24a, 24b, thereby providing a core screw 12 with a flush configuration with respect to sleeve 14 after fastener 10 has been adjusted. In certain embodiments, the core screw 12 can have a structure and function such as any of the pin elements described in U.S. Patent No. 6,868,757 (the '757) Patent and U.S. Patent No. 7,308,842 (the '842 Patent), both of which are incorporated herein by reference in their entirety.
    [0016] Still referring to Figure 1, in one embodiment, the sleeve 14 includes an elongated body 38 having a first end 40 and a second end 42 opposite the first end 40. In one embodiment, the body 38 is cylindrical in shape and a smooth outer surface 44. In certain embodiments, the body 38 has a diameter that provides a slight loose fit or a snap fit through the openings 22a, 22b of the workpieces 24a, 24b. In one embodiment, the glove 14 includes a head 46 at the first end 40 of the body 38. In one embodiment, the glove head 46 is lowered and flush with an outer surface 48 of the accessible side 25 of the workpiece 24a. In another embodiment, the head 46 projects from the outer surface 48 of the accessible side 25 of the workpiece 24a. In one embodiment, the head 46 may include a round head, a helical head, or other suitable shape that is well known in the fastener art. In one embodiment, the head 30 of the core screw 12 is adapted to seat in an annular, outwardly facing seat 49 on the head 46 of the sleeve 14. In one embodiment, the seat 49 is frusto-conical and tapered in a manner. complementary with that of the head 30 of the core screw 12 so that the core screw 12 is embedded in the sleeve 14.
    [0017] With continued reference to Figure 1, in one embodiment, the sleeve 14 has an inner threaded portion 50 located at the second end 42 of the sleeve 14 and a smooth inner portion 54 juxtaposed with the threaded portion 50 and extending between the first and second ends 40, 42. In one embodiment, the inner threaded portion 50 is adapted to threadedly engage the threaded portion 28 of the core screw 12. In one embodiment, the inner threaded portion 50 of the sleeve 14 has a thickness that is greater. that a thickness of the inner smooth portion 52 of the glove 14. In one embodiment, an annealed portion 54 on the body 38 of the glove 14 is locally induction annealed to facilitate the formation of a bulb 55, which will be described in further detail below. In one embodiment, the annealed portion 54 further facilitates the formation of the bulb 55 against the blind side surface 27 of the workpiece 24b in all clamping bands of the fastener 10.
    [0018] Still referring to Figure 1, in one embodiment, the outer surface 44 of the glove 14 includes a tapered notch 56 formed therein and located between the first and second ends 40, 42 of the glove 14. In one embodiment, the notch 56 forms a conically tapered portion 57. In one embodiment, sleeve 14 is machined to form notch 56 and tapered portion 57. In one embodiment, as measured from a longitudinal axis AA of fastener 10, the tapered portion has a tilt over a range of about 5° to about 30°. In one embodiment, the tapered portion 57 has a 10° slope. In one embodiment, the tapered portion 57 has a 15° slope. In one embodiment, the tapered portion 57 has a 20° slope. In one embodiment, the tapered portion 57 has a 25° slope. In one embodiment, the tapered portion 57 has a 30° inclination. In one embodiment, the tapered portion 57 is serrated, abraded, notched, or provided within any number of alternative improved friction surfaces. The purpose and function of the tapered part 57 should be described hereafter.
    [0019] With continuous reference to Figure 1, in one embodiment, the head 46 of the sleeve 14 includes a number of recesses 58 disposed therein, which are adapted to receive a plurality of ribs projecting from a tip of an installation tool, as shown in the Patent 1757 and '842 Patent. In one embodiment, the plurality of recesses 58 are disposed in the head 46 of the sleeve 14 in a generally circular orientation. In another embodiment, the recesses 58 can be formed in any configuration that allows the head 46 of the sleeve 14 to be engaged with the ribs of the installation tool, such as in the orientation of a hexagon, a square, a transverse slot configuration, or a single slit configuration.
    [0020] In one embodiment, prior to installing the fastener 10 on the workpieces 24a, 24b, the fastener 10 is assembled. Referring to Figures 1 and 2, in one embodiment, fastener 10 is assembled by inserting core screw 12 into sleeve 14 and threading threaded portion 28 of core screw 12 with threaded portion 50 of sleeve 14. In one embodiment , the holder 10 is inserted through the openings 22a, 22b of the workpieces 24a, 24b and the first head 46 of the sleeve 14 is received against the outer surface 48 of the accessible side 25 of the workpiece 24a and at least a portion of the body. 38 of sleeve 14 protrudes outward from workpiece 24b and is adjacent to the outer surface of blind side 27 of workpiece 24b. In one embodiment, the annealed portion 54 and the notch 56 and the tapered portion 57 extend beyond the outer surface of the blind side 27 of the workpiece 24b. In one embodiment, Figure 1 shows the maximum tightening of fastener 10, while Figure 2 shows the minimum tightening of fastener 10 for workpieces 124a, 124b, which have less overall thickness than that shown in Figure 1.
    [0021] In one embodiment, the rotary installation tool having a nose assembly (not shown in the figures) is provided to adjust the fastener 10. In one embodiment, the splines or threads 34 of the second head 32 of the core screw 12 are engaged with splines or threads from a tool driver (not shown in figures). In one embodiment, on tool actuation by the end user, the splined engagement between the core screw 12 and the nose assembly simultaneously pulls the nose assembly into the fastener 10 during tool actuation to ensure proper engagement of the splines with the recesses 58 and rotationally twisting the core screw 12 to effectively form the bulb 55, as shown in Figure 3. In one embodiment, the formation of the bulb 55 begins at the diameter of the sleeve 14. In one embodiment, the formation of the bulb 55 occurs near to notch 56. In one embodiment, the formation of bulb 55 begins at the same location in sleeve 14, independent of structural tightness (e.g., maximum tightness, minimum tightness or between them), and therefore allowing the annealed portion 54 ( as shown in Figures 1 and 2) has a shorter width and is applied to a target area on the sleeve 14. In one embodiment, the formation of the bulb 55 defines the body 38 as two segments: a domed portion 61, which extends from thebulb 55 to the second end 42 of the body 38 and a body portion 39, which extends from the bulb 55 to the first end 40 of the body 38. In one embodiment, the rotation of the domed portion 61 and thus the inner threaded portion 50 of the sleeve 14 is impeded because the domed portion 61 and the body portion 39 remain integral during this stage of installation of the fastener 10.
    [0022] Referring to Figure 4, when a selected axial force applied to fastener 10 is reached, the domed portion 61 (and thus bulb 55 and threaded portion 50) of sleeve 14 is cut from body 38 at a nearby location to the notch 56 and the tapered part 57, thus forming the separate and distinct domed part 61 and the body part 39 (which is now the remaining part of the body 38 after the domed part 61 is cut). In one embodiment, when the domed portion 61 is cut, it is forced to the tapered portion 57. In one embodiment, as described above, the tapered portion 57 is provided with improved serrated, abraded, notched or friction surfaces to promote engagement of the domed portion 61 with body portion 39 and ensure that domed portion 61 and core screw 12 will not rotate together in rotation of core screw 12. Furthermore, in one embodiment, after cupped portion 61 is cut from the body 38, rotation of the domed portion 61 with respect to the body portion 39 is prevented by friction due to the existence of serrated, abraded, notched or friction-enhanced surfaces on the tapered portion 57. In one embodiment, the threaded portion 28 of the screw is core 12 continues to threadably engage the threaded portion 50 of the sleeve 14, dragging the domed portion 61 along the body portion 39 and closer to the blind side surface 27 of the workpiece 24b. The diameter of the bulb 55 increases when the domed portion 61 is forced upward into the tapered portion 57. Referring to Figure 5, in one embodiment, the bulb 55 is then forced against the blind side 27 of the workpiece 24b and flattens out. , growing in diameter to its final shape which develops a footprint or bearing surface 60 against the blind side 27. In one embodiment, the footprint 60 has an outside diameter D1 that is at least 1.5 times the diameter of fastener 10 (by example, the nominal rod diameter of the fastener 10). In one embodiment, the footprint 60 has a diameter D1 that is at least 2 times the diameter of fastener 10. When bulb 55 is formed, further rotation of core screw 12 ceases. At this point, a torsional load builds up in the core screw 12 and the breakneck groove 36 will fracture in a torsional or rotational cut and the second head 32 will snap off at the breakneck groove 36 (shown in figures 1, 5 and 6 ). In one embodiment, the head 30 of the core screw will be flush with the head 46 of the sleeve 14. In one embodiment, the work pieces 24a, 24b are not exposed to high peak strain loads during installation of the fastener 10. In In one embodiment, since the formation of the bulb 55 is initiated prior to the separation of the domed portion 61 from the body portion 38, the compressive load on the work pieces 24a, 24b is substantially reduced and the indentations in the contact surface created by the forces of bulb formation, are reduced. Figure 6 shows the fastener 10 installed within the workpieces 124a, 124b, but a minimum grip length.
    [0023] It should be understood that the embodiments described herein are merely exemplary and that a person skilled in the art can make many modifications without departing from the spirit and scope of the invention. In one embodiment, the fastener 10 may be a blind traction-type fastener or a blind threaded-type fastener. In another embodiment, fastener 10 is used in aerospace applications. In another embodiment, fastener 10 is used in industrial applications. Accordingly, all such variations and modifications are intended to be included within the scope of the modalities described and claimed herein.
    权利要求:
    Claims (13)
    [0001]
    1. Blind fastener (10), comprising: a core screw (12) having an elongated shank (16) with a first end (18) and a second end (20) opposite the first end (18), a head ( 30) located at the first end (18), and a threaded portion (28) located at the second end (20); and a sleeve (14) having an elongated body (38) with a first end (40), a second end (42) opposite the first end (40) of the elongated body (38), an outer surface (44) extending therefrom. first end (40) of the elongate body (38) to the second end (42) of the elongate body (38), a head (46) located at the first end (40) of the elongate body (38), an internal threaded portion (50 ) located at the second end (42) of the elongate body (38) and a tapered notch (56) formed within the outer surface (44) between the first and second ends (40, 42) of the elongate body (38) and defined by a tapered portion (57), wherein the core screw (12) is adapted to be installed within the sleeve (14) so that the threaded portion (28) of the core screw (12) threadedly engages the threaded portion. inner (50) of the sleeve (14), wherein the fastener (10) is adapted to be installed within the openings (22a, 22b) of two or more workpieces. garlic (24a, 24b), such that the head (46) of the sleeve (14) engages an accessible side of one of the work pieces (24a, 24b), the head of the pin engages the head (46) of the sleeve (14) and the second end (42) of the elongated body (38) of the sleeve (14) extends from a blind side (27) of another of the workpieces (24a, 24b), characterized in that during installation of the fastener ( 10) within the workpieces (24a, 24b), a bulb (55) is formed in the elongated body (38) of the sleeve (14), the bulb (55) defining a portion of an extending domed portion (61) from the bulb (55) to the second end (42) of the elongated body (38) of the sleeve (14), wherein when a selected axial force applied to the fastener (10) is reached, the domed portion (61) separates from the elongated body. (38) and thereafter engages the tapered portion (57) axially and in a direction of the first end (40) of the elongated body (38), thereby increasing the diameter of the bulb (55), and in which when the fastener (10 ) is in an installed position. In addition, the bulb (55) engages the blind side (27) of the other of the work pieces (24a, 24b).
    [0002]
    2. Blind fastener (10), according to claim 1, characterized in that the bulb (55) is formed before separating the domed part (61) from the elongated body (38).
    [0003]
    3. Blind fastener (10), according to claim 1 or 2, characterized in that the sleeve (14) includes an annealed part (54) to facilitate the formation of the bulb (55).
    [0004]
    4. Blind fastener (10), according to any one of claims 1 to 3, characterized in that the domed part (61) is adapted to separate from the elongated body (38) next to the tapered notch (56).
    [0005]
    5. Blind fastener (10) according to any one of claims 1 to 4, characterized in that the tapered part (57) includes an improved frictional surface, which is adapted to inhibit rotation of the domed part (61) with relative to the elongated body (38) after the domed portion (61) separates from the elongated body (38).
    [0006]
    6. Blind fastener (10), according to claim 5, characterized in that the improved frictional surface includes serrations; or where the improved frictional surface includes wear; or wherein the improved frictional surface includes two or more notches (56).
    [0007]
    7. Blind fastener according to any one of claims 1 to 5, characterized in that the tapered part (57) has an inclination in a range of about 5 degrees to about 30 degrees.
    [0008]
    8. Blind fastener (10), according to any one of claims 1 to 5, characterized in that the tapered part (57) has an inclination of about 5 degrees; or wherein the tapered portion (57) has an inclination of about 10 degrees; or wherein the tapered portion (57) has an inclination of about 15 degrees; or wherein the tapered portion (57) has an inclination of about 20 degrees; or wherein the tapered portion (57) has an inclination of about 25 degrees; or wherein the tapered portion (57) has an inclination of about 30 degrees.
    [0009]
    9. Blind fastener according to any one of claims 1 to 8, characterized in that the bulb (55) includes a diameter that is at least one and a half times a diameter of the fastener (10).
    [0010]
    10. Blind fastener (10) according to any one of claims 1 to 9, characterized in that the bulb (55) includes a diameter that is at least twice the diameter of the fastener (10).
    [0011]
    11. Blind fastener (10) according to any one of claims 1 to 10, characterized in that the core screw (12) includes a second head (32) extending axially from the first head (30) of the screw. core (12) and a "breakneck" groove (36) formed between the first and second heads (30, 32) of the core screw (12), and wherein when the fastener (10) is in its installed position, the second head (32) is fractured from the first head (30) in the breakneck groove (36).
    [0012]
    12. Blind fastener (10) according to any one of claims 1 to 11, characterized in that the elongated body (38) of the sleeve (14) is adapted to absorb a peak deformation load during fastener installation blind (10), thereby minimizing indentations in at least one of the work pieces (24a, 24b).
    [0013]
    13. Blind fastener (10) according to any one of claims 7, 9 or 11, characterized in that an annealed part (54) is located intermediate between the first and second ends (40, 42) of the elongated body (38).
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    法律状态:
    2017-08-15| B25D| Requested change of name of applicant approved|Owner name: ARCONIC INC. (US) |
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-12-10| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-01-26| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2021-03-30| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-05-04| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 11/04/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    2021-10-26| B25D| Requested change of name of applicant approved|Owner name: HOWMET AEROSPACE INC. (US) |
    2021-11-16| B25G| Requested change of headquarter approved|Owner name: HOWMET AEROSPACE INC. (US) |
    优先权:
    申请号 | 申请日 | 专利标题
    US201261625235P| true| 2012-04-17|2012-04-17|
    US61/625,235|2012-04-17|
    PCT/US2013/036129|WO2013158457A1|2012-04-17|2013-04-11|Blind fastener|
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