Method of covering a portion of a fastener protruding from a surface

Patent metadata

Field	Value
Publication number	US-11149780-B2
Application number	US-201916659895-A
Country	US
Kind code	B2
Filing date	Oct 22, 2019
Priority date	Sep 23, 2013
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A method of covering a portion of a fastener, protruding from a surface, that comprises providing a cap comprising a wall, a base, an interior, at least partially delimited by the wall and the base, and pawls, located in the interior of the cap. The method further comprises coupling a tooth to the fastener, covering the portion of the fastener with the cap, and positively engaging the pawls with the tooth, such that the pawls are loaded in tension against the tooth.

First claim

What is claimed is:

1. A method of covering a portion of a fastener, protruding from a surface, with a cap that comprises a wall, a base, an interior, at least partially delimited by the wall and the base, a seal, coupled to the base, and pawls, located in the interior of the cap, the fastener comprising a spacer, positioned between a tooth, extending from the portion of the fastener, and the surface, so that a space, sized to enable engagement of the pawls with the tooth, is defined between the tooth and the surface, the method comprising
covering the portion of the fastener with the cap so that the cap is biased against the surface and the pawls positively engage the tooth such that the pawls are loaded in tension against the tooth by compressing the seal between the surface and the base of the cap.

2. The method in accordance with claim 1 , wherein covering the portion of the fastener with the cap comprises locating the tooth proximal to the surface.

3. The method in accordance with claim 1 , wherein:
the wall comprises an interior surface;
each of the pawls has a first end, proximal to the interior surface, and a second end, distal from the interior surface; and
the second end of each of the pawls is located closer to the base than the first end.

4. The method in accordance with claim 1 , wherein:
the fastener protrudes from the surface along a longitudinal axis; and
covering the portion of the fastener with the cap comprises orienting the tooth relative to the fastener such that an engagement surface on the tooth is oblique relative to the longitudinal axis.

5. The method in accordance with claim 4 , wherein covering the portion of the fastener with the cap comprises sliding the pawls across the engagement surface into positive engagement with the tooth.

6. The method in accordance with claim 1 , wherein covering the portion of the fastener with the cap comprises elastically deforming the pawls relative to the tooth prior to positively engaging the pawls with the tooth.

7. The method in accordance with claim 1 , wherein covering the portion of the fastener with the cap comprises biasing the pawls against the tooth.

8. The method in accordance with claim 1 , wherein the cap comprises at least one port extending through the wall.

9. The method in accordance with claim 8 , wherein the at least one port is a single port.

10. The method in accordance with claim 9 , further comprising:
sealing the base of the cap against the surface;
creating a vacuum in the interior of the cap; and
injecting a sealant into the interior of the cap.

11. The method in accordance with claim 10 , wherein creating the vacuum in the interior comprises withdrawing air from the interior through the single port.

12. The method in accordance with claim 10 , wherein injecting the sealant comprises injecting a predetermined amount of the sealant into the interior of the cap through the single port.

13. The method in accordance with claim 12 , wherein injecting the predetermined amount of the sealant comprises determining the predetermined amount of the sealant based on a vacant volume of the interior of the cap.

14. The method in accordance with claim 10 , further comprising discontinuing to inject the sealant upon detecting a predetermined back pressure at the single port.

15. The method in accordance with claim 8 , further comprising:
sealing the base of the cap against the surface;
injecting a sealant into the interior of the cap through the at least one port; and
enabling air to escape from the interior of the cap through the at least one port.

16. The method in accordance with claim 15 , wherein the at least one port comprises an injection port and a bleed port.

17. The method in accordance with claim 16 , wherein:
the sealant is injected into the interior of the cap through the injection port; and
the air escapes from the interior of the cap through the bleed port.

18. The method in accordance with claim 1 , wherein the tooth comprises a tapered surface, facing away from the fastener.

19. The method in accordance with claim 18 , wherein covering the portion of the fastener with the cap comprises sliding the pawls over the tapered surface into positive engagement with the tooth.

20. The method in accordance with claim 14 , further comprising:
sealing the base of the cap against the surface;
injecting a sealant into the interior of the cap through the at least one port; and
enabling air to escape from the interior of the cap through the at least one port.

Assignees

• Boeing Co

Inventors

• Rawdon Blaine Knight
• Cameron Michael Scott

Classifications

• F16B37/14 Primary

  Cap nuts; Nut caps or bolt caps · CPC title

• Y10T29/49764

  with testing or indicating · CPC title

• F16B41/00

  Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins ({locking of screws, bolts or nuts F16B39/00;} seals G09F3/00) · CPC title

• B64D37/32

  Safety measures not otherwise provided for, e.g. preventing explosive conditions · CPC title

• Y10T29/4998

  Combined manufacture including applying or shaping of fluent material · CPC title