Double-ended dual attached fastener

Patent metadata

Field	Value
Publication number	US-2019293100-A1
Application number	US-201815935767-A
Country	US
Kind code	A1
Filing date	Mar 26, 2018
Priority date	Mar 26, 2018
Publication date	Sep 26, 2019
Grant date	—

Abstract

A double ended dual attached fastener includes a first portion having a stud bolt, a second portion configured to anchor to a panel member, and a flange nut partitioning the first end and the second end. The flange nut includes a flat interior annular surface facing the second portion. The flange nut includes a plurality of radially spaced weld projections extending toward the second portion. The weld projection includes a material that amendable to form a weld joining the flange nut to a panel member through which the second portion is inserted. The second portion defines a fastener selected from a group consisting of a self-tapping friction screw, a self-piercing rivet, and a swage bolt.

First claim

What is claimed is:

1 . A fastener comprising,
a central shank extending along a longitudinal axis; a flange partitioning the central shank into a first shank portion and a second shank portion, wherein the flange includes an interior surface facing the second shank portion; and at least one weld projection extending from the interior surface of the flange.

2 . The fastener of claim 1 , wherein the at least one weld projection is an annular projection.

3 . The fastener of claim 1 , wherein the at least one weld projection includes a semi-spherical portion.

4 . The fastener of claim 3 , wherein the at least one weld projection includes a cylindrical portion having a first end integral with the interior surface of the flange and an opposite second end integral with the semi-spherical portion.

5 . The fastener of claim 4 , wherein the at least one weld projection includes at least three weld projections evenly radially spaced on a flat annular surface.

6 . The fastener of claim 1 , wherein the at least one weld projection is an annular ring concentric with the axis.

7 . The fastener of claim 3 , wherein the first shank portion defines a stud bolt.

8 . The fastener of claim 7 , wherein the second shank portion defines a friction screw.

9 . The fastener of claim 7 , wherein the second shank portion defines a self-piercing rivet.

10 . The fastener of claim 7 , wherein the second shank portion defines a swage bolt.

11 . A dual attached fastener, comprising:
a first portion comprising a stud bolt; a second portion configured to anchor to a member panel, wherein the second portion extends in a direction opposite the first portion; a flange member partitioning the first portion and the second portion, wherein the flange member includes a flat interior surface facing the second portion; and at least one weld projection extending from the flat interior surface of the flange member toward the second portion.

12 . The double-ended fastener of claim 11 , wherein the flat interior surface of the flange member is an annular flat surface, and wherein the at least one weld projection is an annular ring concentrically disposed on the annular flat surface.

13 . The dual attached fastener of claim 11 , wherein the at least one weld projection includes at least three projections radially spaced on the flat interior surface.

14 . The dual attached fastener of claim 13 , wherein the second portion comprises a fastener selected from a group of fasteners consisting of a friction screw, a self-piercing rivet, and a swage bolt.

15 . The dual attached fastener of claim 12 , wherein the flange member includes an exterior surface defining a torque receiving member, and wherein the second portion comprises a self-tapping friction screw.

16 . A doubled-ended dual attached fastener, comprising:
a central shank extending along a longitudinal axis; a flange nut partitioning the central shank into a first portion defining a stud bolt and a second portion configured to be insertable through a front surface of a panel member, wherein the stud bolt, flange nut, and second portion is a single integral unit, wherein the flange nut includes an interior annular surface facing the second portion and perpendicular to the longitudinal axis, and an exterior surface defining a torque receiving member, and wherein the interior annular surface includes at least one weld projection extending parallel to the longitudinal axis toward the second portion.

17 . The double-ended dual attached fastener of claim 16 , wherein the at least one weld projection includes a material that is amendable to form a solid-state weld joining the flange nut to a panel member through which the second portion is inserted.

18 . The double-ended dual attached fastener of claim 17 , wherein the second portion defines a fastener selected from a group consisting of a self-tapping friction screw, a self-piercing rivet, and a swage bolt.

19 . The double-ended dual attached fastener of claim 17 , wherein the second portion defines a self-tapping friction screw comprising of a convolution of sharp crested male threads and a sharpened tip terminating at distal end of the second portion.

20 . The double-ended dual attached fastener of claim 19 , wherein the at least one weld projection includes a semi-circular cross-section.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Cipriano Steven
• Blaski Bradley J
• Janis Richard C
• Wang Pei-Chung

Classifications

• F16B25/0094

  the screw being assembled or manufactured from several components, e.g. a tip out of a first material welded to shaft of a second material · CPC title

• F16B35/00

  Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws ({F16B33/008 takes precedence; joining sheets or plates using screws with two separate threads F16B5/0275; using screws with adjustment sleeves F16B5/0283}; thread cutting screws F16B25/00) · CPC title

• F16B25/0036

  characterised by geometric details of the screw · CPC title

• F16B35/041

  Specially-shaped shafts (shape of thread F16B33/02) · CPC title

• F16B35/002

  onto which threads are cut during screwing (F16B37/002 takes precedence) · CPC title