US4806054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Male threaded fastener capable of use with a swaged collar
Assignee: Fairchild Holding Corp
•
Filing: 1988-05-31
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Granted: 1989-02-21
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Expires: 2008-05-31
Abstract
Abstract A male threaded fastener has a plurality of impressions on the nonload-bearing flank of the thread that receives material swaged from a collar to lock the collar and pin together and increase the breakaway torque of the collar. The impressions have a depth of about 0.1 to about 0.3 of the depth of the thread from root to crest. The thread is free of impressions at least 1.5 pitch lengths from its ends.
Inventors
- 👤 Jack Rath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:49
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/02; F16B19/00; F16B19/04; F16B19/05; F16B33/00; F16B33/02; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/938
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
In a male fastener used with a cooperating threaded female fastener or a swaged collar, the male fastener having a thread extending from one end of the fastener to an interior end of the thread, the thread having root, a major diameter, a load bearing flank, a nonload-bearing flank, and no projections on either flank, an improvement comprising; a plurality of spaced apart impressions only on the thread major diameter and on the nonload-bearing flank, the nonload-bearing flank being smooth and continuous except for the impressions, the load-bearing flank being smooth and continuous and free of the impressions, whereby, when used with a swaged collar, collar material enters the impressions to lock the collar and the male fastener together, but when used with a threaded female fastener the impressions do not increase the friction between the male and female fasteners during installation.
Claim 2
Dependent Claim
142 words
In a male fastener used with a cooperating threaded female fastener or a swaged collar, the male fastener having a thread extending from one end of the fastener to an interior end of the thread, the thread having root, a major diameter, a load bearing flank, a nonload-bearing flank, and no projections on either flank, an improvement comprising; a plurality of spaced apart impressions only on the thread major diameter and on the nonload-bearing flank, the nonload-bearing flank being smooth and continuous except for the impressions, the load-bearing flank being smooth and continuous and free of the impressions, whereby, when used with a swaged collar, collar material enters the impressions to lock the collar and the male fastener together, but when used with a threaded female fastener the impressions do not increase the friction between the male and female fasteners during installation.
Claim 3
Dependent Claim
32 words
The improvement claimed in claim 1 wherein the impressions are from about 0.1 to about 0.3 times the height of the thread measured from the thread root to the thread major diameter.
Claim 4
Dependent Claim
24 words
The improvement claimed in claim 1 wherein the impressions are spaced axially at least 1.5 thread convolutions from the interior end of the thread.
Claim 5
Dependent Claim
32 words
The improvement claimed in claim 3 where the impressions are from about 0.1 to about 0.3 times the height of the thread measured from the thread root to the thread major diameter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |