Fastening system including removable stud and retaining plate

Patent metadata

Field	Value
Publication number	US-9328764-B2
Application number	US-201313932462-A
Country	US
Kind code	B2
Filing date	Jul 1, 2013
Priority date	Jul 1, 2013
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

A fastening system includes a removable stud and a retaining plate. The removable stud includes a threaded portion configured to be removably threaded into a threaded bore of a housing, a shank portion arranged coaxially with the threaded portion and configured to be inserted through a bore of a housing of a line replaceable component, and an anti-rotation portion disposed between the threaded portion and the shank portion. The retaining plate is configured to be mounted between the housing and the line replaceable component. The retaining plate includes a mating hole configured to mate with the anti-rotation portion of the removable stud.

First claim

The invention claimed is:

1. A fastening system comprising:
a first housing of a line replaceable component, the first housing of the line replaceable component comprising a bore having a depth;
a removable stud comprising:
a threaded portion configured to be removably threaded into a threaded bore of a second housing;
a shank portion arranged coaxially with the threaded portion and configured to be inserted through the bore of the first housing of the line replaceable component; and
an anti-rotation portion disposed between the threaded portion and the shank portion and abutting threads of the threaded portion, the anti-rotation portion having a first thickness,
wherein the shank portion further comprises an unthreaded portion coaxially arranged with the anti-rotation portion and a threaded portion coaxially arranged with the unthreaded portion; and

a retaining plate configured to be mounted between the second housing and the first housing of the line replaceable component, the retaining plate having a second thickness that is greater than the first thickness of the anti-rotation portion and comprising a mating hole configured to mate with the anti-rotation portion of the removable stud,
wherein the unthreaded portion of the shank portion of the removable stud has a length that is greater than or equal to a sum of the second thickness and the depth of the bore of the first housing of the line replaceable component less the first thickness.

2. The fastening system of claim 1 ,
wherein the anti-rotation portion of the removable stud comprises a plurality of protrusions circumferentially arranged around the removable stud,
wherein the mating hole of the retaining plate comprises a plurality of voids circumferentially arranged around the mating hole, and
wherein the mating hole of the retaining plate is configured to mate with the anti-rotation portion of the removable stud by receiving at least one of the plurality of protrusions of the anti-rotation portion of the removable stud in a respective one of the plurality of voids of the mating hole.

3. The fastening system of claim 2 ,
wherein each protrusion of the plurality of protrusions of the anti-rotation portion of the removable stud comprises a triangular-shaped protrusion, and
wherein each void of the plurality of voids of the mating hole comprises a triangular-shaped void that is complementary to each of the triangular-shaped protrusions of the anti-rotation portion of the removable stud.

4. The fastening system of claim 2 , wherein each protrusion of the plurality of protrusions is symmetrical.

5. The fastening system of claim 2 , wherein the plurality of protrusions of the anti-rotation portion are symmetrically arranged around the removable stud.

6. The fastening system of claim 1 , further comprising:
a self-locking washer; and
a self-locking nut,
wherein the self-locking washer is configured to be mounted between the first housing of the line replaceable component and the self-locking nut, and
wherein the self-locking nut is configured to be threaded onto the threaded portion of the shank portion of the removable stud.

7. A fastening system comprising:
a first housing of a line replaceable component, the first housing of the line replaceable component comprising a plurality of bores, each having a respective depth;
a plurality of removable studs, each removable stud of the plurality of removable studs comprising:
a threaded portion configured to be removably threaded into a respective one of a plurality of threaded bores of a second housing;
a shank portion arranged coaxially with the threaded portion and configured to be inserted through a respective one of the plurality of bores of the first housing of the line replaceable component; and
an anti-rotation portion disposed between the threaded portion and the shank portion and abutting threads of the threaded portion, the anti-rotation portion having a first thickness;
wherein the shank portion further comprises an unthreaded portion coaxially arranged with the anti-rotation portion and a threaded portion coaxially arranged with the unthreaded portion; and

a retaining plate configured to be mounted between the second housing and the first housing of the line replaceable component, the retaining plate having a second thickness that is greater than the first thickness of the anti-rotation portion and comprising a plurality of mating holes, each of the plurality of mating holes configured to mate with an anti-rotation portion of a respective one of the plurality of removable studs,
wherein the unthreaded portion of the shank portion of each of the plurality of removable studs has a length that is greater than or equal to a sum of the second thickness and the depth of the respective one of the plurality of bores of the first housing of the line replaceable component less the first thickness.

8. The fastening system of claim 7 ,
wherein the plurality of mating holes of the retaining plate are arranged within the retaining plate to form a pattern of mating holes,
wherein the plurality of bores of the first housing are arranged within the first housing to form a pattern of bores, and
wherein the pattern of mating holes is configured to match the pattern of bores.

9. The fastening system of claim 7 ,
wherein the anti-rotation portion of each removable stud of the plurality of removable studs comprises a plurality of protrusions circumferentially arranged around the respective removable stud,
wherein each mating hole of the plurality of mating holes of the retaining plate comprises a plurality of voids circumferentially arranged around the respective mating hole, and
wherein each mating hole of the plurality of mating holes of the retaining plate is configured to mate with the anti-rotation portion of a respective one of the plurality of removable studs by receiving at least one of the plurality of protrusions of the anti-rotation portion of the respective one of the plurality of removable studs in a respective one of the plurality of voids of the respective mating hole.

10. The fastening system of claim 9 ,
wherein each protrusion of the plurality of protrusions of the anti-rotation portion of each of the plurality of removable studs comprises a triangular-shaped protrusion, and
wherein each void of the plurality of voids of each of the plurality of mating holes of the retaining plate comprises a triangular-shaped void that is complementary to each of the triangular-shaped protrusions of the plurality of triangular-shaped protrusions of the anti-rotation portion of each of the plurality of removable studs.

11. The fastening system of claim 9 , wherein each protrusion of the plurality of protrusions of each of the plurality of removable studs is symmetrical.

12. The fastening system of claim 9 , wherein the plurality of protrusions of each the anti-rotation portion of each of the plurality of removable studs are symmetrically arranged around a respective one of the plurality of removable studs.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Plickys Mark R

Classifications

• F16B33/002

  Means for preventing rotation of screw-threaded elements (F16B39/00 takes precedence) · CPC title

• F16B39/282 Primary

  Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts · CPC title

• F16B5/0275 Primary

  the screw-threaded element having at least two axially separated threaded portions (F16B5/0283 takes precedence) · CPC title