Hybrid contoured load-spreading washer

• US 8,528,874 B2
• Filed: 05/17/2007
• Issued: 09/10/2013
• Est. Priority Date: 05/17/2007
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Gregg, Paul S., Esposito, Jack, Firth, Lee C., Hunziker, Kenneth J.
• Primary Examiner(s): Wendell, Mark
• Assistant Examiner(s): Smith, Matthew J
• Application Number:
  US11/749,895
• Publication Number:
  US 20080286073A1
• Time in Patent Office: 2,308 Days
• Field of Search: 248/429, 244/118.6, 296/65.13, D83/99
• US Class Current: 248/429
• CPC Class Codes: F16B 31/04 for maintaining a tensile load
• CPC Class Codes: F16B 43/00 Washers or equivalent devices; Other devices for supporting bolt-heads or nuts circlips F16B21/18; for indicating tensile load F16B31/02; forming a whole with the bolt or nut F16B33/00; locking bolts or nuts by means of a fixed plate or ring, or washer-like resilient plates F16B39/10, F16B39/24

Abstract

A hybrid contoured load-spreading washer is disclosed. An illustrative embodiment of the washer includes a washer body having a composite layer and a metal layer bonded to the composite layer and a fastener opening extending through the washer body. A floor beam seat track attachment assembly and a method of transmitting a load from a seat track to a floor beam web in a seat track attachment assembly are also disclosed.

Claims

1. An apparatus, comprising:

a body comprising a fiber and polymer composite layer and a metal layer laminated to said fiber and polymer composite layer;

a fastener opening extending through said body,

said body defined by at least three sides, wherein one of said three sides comprises a contour to matingly engage and correspond to a corresponding contour of a structure to substantially fill a gap between a fastener and the structure to enable a load applied to the fastener to be at least partially distributed from the fastener, through the body, to the structure, the one of said three sides is substantially non-perpendicular relative to an axis of the fastener opening.

2. The apparatus of claim 1 wherein said fiber and polymer composite layer comprises graphite and epoxy.

3. The apparatus of claim 1 wherein said metal layer comprises a titanium alloy.

4. The apparatus of claim 1, wherein the load applied to the fastener is to be at least partially distributed from the fastener, through the body relative to an axis thereof, to the structure.

5. An assembly, comprising:

a first beam;

a beam cap having at least one fastener opening provided on said first beam;

a second beam having at least one fastener opening provided on said second beam;

at least one fastener extending through said at least one fastener opening of said second beam and said at least one fastener opening of said first beam;

at least one washer including a washer body having a composite layer and a metal layer bonded to said composite layer and a fastener opening extending through said composite layer and said metal layer;

wherein said at least one fastener extends through said fastener opening of said washer body and said composite layer of said washer body engages said beam cap; and

wherein a surface of said washer body is to engage a beam web of said first beam to enable a load applied to said fastener to be at least partially distributed from said fastener, through said washer body, to said first beam.

6. The assembly of claim 5 wherein said at least one washer comprises a pair of washers and said at least one fastener comprises a pair of fasteners.

7. The assembly of claim 5 wherein said composite layer of said washer body comprises graphite and epoxy.

8. The assembly of claim 5 wherein said metal layer of said washer body comprises a titanium alloy.

9. The assembly of claim 5 wherein said composite layer of said washer body is biased along an axis disposed in a generally parallel relationship with respect to a plane of said washer body.

10. The assembly of claim 5 wherein said washer body has a generally triangular shape.

11. The seat track attachment assembly of claim 5 wherein said washer body has a generally triangular shape defined by three sides wherein one of said three sides comprises a concave notch shape.

12. The assembly of claim 5, wherein the first beam comprises a floor beam and the second beam comprises a seat track.

13. A method of transmitting a load from a first beam to a beam web of a second beam, comprising:

providing at least one washer including a washer body having a composite layer in engagement with a beam web, a metal layer bonded to said composite layer and a fastener opening extending through said washer body;

extending a fastener through at least one fastener opening in a first beam, at least one fastener opening in a beam cap and said fastener opening in said washer body to enable a primary fastener load to be transmitted from said first beam to said beam web through said fastener and said washer body, respectively.

14. The method of claim 13 wherein said composite layer of said washer body comprises graphite and epoxy and said metal layer of said washer body comprises a titanium alloy.

15. The method of claim 13 wherein said composite layer of said washer body is biased along an axis disposed in a generally parallel relationship with respect to a plane of said washer body.

16. The method of claim 13 further comprising a plurality of web ridges provided in said beam web and a washer notch provided in said washer body and receiving one of said plurality of web ridges.

17. The method of claim 13 wherein said washer body has a generally triangular shape defined by three sides wherein one of said three sides comprises a concave notch shape.

18. The method of claim 13 wherein said first beam comprises a seat track and said second beam comprises a seat track attachment assembly having the beam cap between said seat track and said beam web.

19. An apparatus, comprising:

a body including a metallic layer coupled to a composite layer, the body comprising;

an aperture to receive a fastener;

a first side comprising a first planar surface;

a second side comprising a second planar surface; and

a third side comprising a contoured surface to correspond to a portion of a beam web, the contoured surface substantially non-perpendicular relative to an axis of the aperture.

20. The apparatus of claim 19, wherein the first side is coupled to the second side by a first curved surface, the first side is coupled to the third side by a second curved surface, and the second side is coupled to the third side by a third curved surface.