SWAGE LOCK FASTENERS
A fastener includes a pin member, a swage collar, and a nut. The pin member includes a shank portion having first and second ends and a threaded portion including an external thread. The swage collar has first and second ends and is adapted to be installed on the pin member and swaged onto the external thread of the pin member. The second end of the swage collar is positioned distal from the first end of the pin member when the swage collar is installed on the pin member. The nut is adapted to be installed on the pin member and has first and second ends and an internal thread adapted to engage the external thread of the pin member. When the nut is installed on the pin member, the nut is adapted to engage the swage collar such that the swage collar is retained on the pin member before swaging.
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This application is a continuation of U.S. patent application Ser. No. 14/697,857, entitled “SWAGE LOCK FASTENERS’, filed Apr. 28, 2015, which is a Section 111(a) application relating to and claiming the benefit of commonly-owned, U.S. Provisional Patent Application Ser. No. 61/985,641, entitled “SWAGE LOCK FASTENERS,” filed Apr. 29, 2014, the contents of both of which are incorporated herein by reference in their entirety.
FIELD OF THE INVENTIONThe present invention relates to fasteners and, more particularly, swage lock fasteners.
BACKGROUND OF THE INVENTIONSwage lock fasteners are used to secure a plurality of work pieces to one another. Typically, swage lock fasteners include a pin member having lock grooves and a lock bolt collar adapted to be swaged into the lock grooves of the pin member by a fastener installation tool. It is desired that a swage lock fastener include a fit-up capability in order to pre-assemble it on a work piece and adjust it as required.
SUMMARY OF THE INVENTIONIn an embodiment, a fastener includes a pin member, a swage collar, and a nut, the pin member including an elongated shank portion having a first end, a second end opposite the first end, and a threaded portion intermediate the first and second ends end and including an external thread, the swage collar having a first end and a second end opposite the first end of the swage collar, the swage collar being adapted to be installed on the pin member and swaged onto the external thread of the pin member, the second end of the swage collar being positioned distal from the first end of the pin member when the swage collar is installed on the pin member, the nut adapted to be installed on the pin member and having a first end, a second end opposite the first end of the nut, and an internal thread adapted to engage threadedly the external thread of the pin member, wherein when the nut is installed on the pin member, the first end of the nut is adapted to engage the second end of the swage collar such that the swage collar is retained on the pin member prior to the swage collar being swaged onto the pin member.
In an embodiment, the external thread includes a helical thread. In an embodiment, the threaded portion also includes an annular groove positioned intermediate the first and second ends of the pin member. In an embodiment, a width of the annular groove is in the range of one times a pitch of the helical thread to two times a pitch of the helical thread.
In an embodiment, the pin member includes a pull portion having at least one pull groove. In an embodiment, the swage collar includes an internal fit-up tab. In an embodiment, the nut is hexagonal in shape or square in shape. In an embodiment, the swage collar includes a flange. In an embodiment, the flange of the swage collar is cylindrical in shape or hexagonal in shape. In an embodiment, the internal thread of the nut extends from the first end of the nut to the second end of the nut.
In an embodiment, the pin member includes carbon steel. In an embodiment, the pin member includes a bolt selected from the group consisting of a Grade 9 strength level bolt, a Class 12.9 strength level bolt, a Grade 2 strength level bolt, a Grade 5 strength level bolt, a Grade 8 strength level bolt, a Class 8.8 strength level bolt, and a Class 10.9 strength level bolt. In an embodiment, the swage collar includes a material selected from the group consisting of low carbon steel, unannealed low carbon steel, annealed low carbon steel, medium carbon boron steel, 10B22 steel, medium carbon steel, and 1038 steel. In an embodiment, the nut includes medium carbon alloy steel. In an embodiment, the pin member includes a head located at the first end of the elongated shank portion of the pin member.
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In an embodiment, the collar 14 includes an internal fit-up tab extending from the first inner wall 52 (not shown in the Figures). In an embodiment, the fit-up tab includes a single thread, such as that shown in U.S. Pat. No. 4,867,625 to Dixon, which is incorporated by reference herein in its entirety. In an embodiment, the fit-up tab is positioned proximate to the first end 36 of the shank 34 of the collar 14. In another embodiment, the collar 14 need not include the fit-up tab.
In an embodiment, the collar 14 is made of low carbon steel. In another embodiment, the collar 14 is made from unannealed low carbon steel. In another embodiment, the collar 14 is made from annealed low carbon steel. In another embodiment, the collar 14 is made from medium carbon boron steel, such as, for example, 10B22 steel. In another embodiment, the collar 14 is made from medium carbon steel, such as, for example, 1038 steel. In another embodiment, the collar 14 is “as-headed” and does not require thermal processing, as disclosed and described in aforesaid U.S. Pat. No. 7,293,339 to Mercer et al. As employed herein, the term “as-headed” refers to a collar which is strain hardened, for example, from cold working, rather than changing hardness using a thermal process (e.g., quench and tempering; stress relieving; etc.).
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The pull grooves 30 of the pull portion 28 of the pin member 12 are adapted to be gripped by matching teeth of chuck jaws (not shown) of a fastener installation tool having a swage anvil 72 (see
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It should be understood that the embodiments described herein are merely exemplary and that a person skilled in the art may make many variations and modifications without departing from the spirit and scope of the invention. All such variations and modifications are intended to be included within the scope of the invention.
Claims
1. A fastener, comprising:
- a pin member including an elongated shank portion having a first end, a second end opposite the first end, and a threaded portion intermediate the first and second ends end and including an external thread;
- a swage collar having a first end and a second end opposite the first end of the swage collar, the swage collar being adapted to be installed on the pin member and swaged onto the external thread of the pin member, the second end of the swage collar being positioned distal from the first end of the pin member when the swage collar is installed on the pin member; and
- a nut adapted to be installed on the pin member and having a first end, a second end opposite the first end of the nut, and an internal thread adapted to engage threadedly the external thread of the pin member,
- wherein when the nut is installed on the pin member, the first end of the nut is adapted to engage the second end of the swage collar such that the swage collar is retained on the pin member prior to the swage collar being swaged onto the pin member.
2. The fastener of claim 1, wherein the external thread comprises a helical thread.
3. The fastener of claim 2, wherein the threaded portion further comprises an annular groove positioned intermediate the first and second ends of the pin member.
4. The fastener of claim 3, wherein a width of the annular groove is in the range of one times a pitch of the helical thread to two times a pitch of the helical thread.
5. The fastener of claim 1, wherein the pin member includes a pull portion having at least one pull groove.
6. The fastener of claim 1, wherein the swage collar further comprises an internal fit-up tab.
7. The fastener of claim 1, wherein the nut is hexagonal in shape or square in shape.
8. The fastener of claim 1, wherein the swage collar includes a flange.
9. The fastener of claim 8, wherein the flange of the swage collar is cylindrical in shape or hexagonal in shape.
10. The fastener of claim 1, wherein the internal thread of the nut extends from the first end of the nut to the second end of the nut.
11. The fastener of claim 1, wherein the pin member comprises carbon steel.
12. The fastener of claim 11, wherein the pin member comprises a bolt selected from the group consisting of a Grade 9 strength level bolt, a Class 12.9 strength level bolt, a Grade 2 strength level bolt, a Grade 5 strength level bolt, a Grade 8 strength level bolt, a Class 8.8 strength level bolt, and a Class 10.9 strength level bolt.
13. The fastener of claim 1, wherein the swage collar comprises a material selected from the group consisting of low carbon steel, unannealed low carbon steel, annealed low carbon steel, medium carbon boron steel, 10B22 steel, medium carbon steel, and 1038 steel.
14. The fastener of claim 1, wherein the nut comprises medium carbon alloy steel.
15. The fastener of claim 1, wherein the pin member includes a head located at the first end of the elongated shank portion of the pin member.
Type: Application
Filed: Dec 28, 2017
Publication Date: May 3, 2018
Applicant: Arconic Inc. (Pittsburgh, PA)
Inventor: Robert Brown (Melbourne)
Application Number: 15/856,723