US3653294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blind fastener
Assignee: Individual
•
Filing: 1969-06-27
•
Granted: 1972-04-04
•
Expires: 1989-06-27
Abstract
Abstract A blind fastener of two piece construction to be placed through a workpiece which is accessable only from one side which may be clamped up by conventional tooling. At installation the blind end of the core of the male core member is drawn into an annealed threaded section of the female nut member forming a bulb in the back of the work area and at the same time providing a deformed thread locking means to resist loosening under vibrations.
Inventors
- 👤 Edgar F Nason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:57
CPC Classifications
F; F16; F16B; F16B19/00; F16B19/04; F16B19/08; F16B19/10; F16B19/1027; F16B19/1036; F16B19/1045; F16B19/1054; F16B13/00; F16B13/04; F16B13/06; F16B13/063; F16B19/1072; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/954
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
264 words
A blind fastener assembly for securing a plurality of workpieces together comprising: a central male core member threadably engageable by an outer female nut member completely surrounding said central male core member; said blind fastener having a head portion at one end of said female nut member and a blind portion at the other end which is inserted into the workpiece into the unaccessable blind area of said workpiece; means on the head end of said female nut member of said blind fastener for holding the female nut member; means forming a head portion on said male core member, said means being engageable by a tool whereby said male core member can be rotatably driven into threaded engagement with said female nut member; means on the blind end of said male core member and said female nut member for resisting said driving, said means being comprised of a portion of the blind end of said male core member having an external diameter greater than the internal diameter of said female nut member, said portion having a first plurality of threads therein and a portion of the blind end of said female nut member having a second plurality of threads therein, said second plurality being adaptable to being threadably engaged with said second plurality, whereby upon threaded engagement said first and second pluralities of threads extend from the blind end of said fastener to a point below the interface Of said workpieces; the combination of driving and resisting forming a bulbous member on the blind end of said fastener thereby securing said plurality of workpieces.
Claim 2
Dependent Claim
264 words
A blind fastener assembly for securing a plurality of workpieces together comprising: a central male core member threadably engageable by an outer female nut member completely surrounding said central male core member; said blind fastener having a head portion at one end of said female nut member and a blind portion at the other end which is inserted into the workpiece into the unaccessable blind area of said workpiece; means on the head end of said female nut member of said blind fastener for holding the female nut member; means forming a head portion on said male core member, said means being engageable by a tool whereby said male core member can be rotatably driven into threaded engagement with said female nut member; means on the blind end of said male core member and said female nut member for resisting said driving, said means being comprised of a portion of the blind end of said male core member having an external diameter greater than the internal diameter of said female nut member, said portion having a first plurality of threads therein and a portion of the blind end of said female nut member having a second plurality of threads therein, said second plurality being adaptable to being threadably engaged with said second plurality, whereby upon threaded engagement said first and second pluralities of threads extend from the blind end of said fastener to a point below the interface Of said workpieces; the combination of driving and resisting forming a bulbous member on the blind end of said fastener thereby securing said plurality of workpieces.
Claim 3
Dependent Claim
26 words
The combination of claim 1 including a collapsing groove in said female nut member thereby decreasing resistance to formation of the bulbous member at said groove.
Claim 4
Dependent Claim
249 words
A blind fastener assembly for securing a plurality of workpieces together comprising: a central male core member threadably engageable by an outer female nut member completely surrounding said central male core member; said blind fastener having a head portion at one end of said female nut member and a blind portion at the other end which is inserted into the workpiece into the unaccessable blind area of said workpiece; means on the head end of said female nut member of said blind fastener for holding the female nut member; means forming a head portion on said male core member, said means being engageable by a tool whereby said male core member can be rotatably driven into threaded engagement with said female nut member; means on the blind end of said male core member and said female nut member for resisting said driving, said means comprising a portion of the blind end of said male core member having a first plurality of unfinished threads therein and a portion of the blind end of said female nut member having a second plurality of unfinished threads therein, said second plurality being adaptable to being threadably engaged with said first plurality whereby upon threaded engagement said first and second pluralities of unfinished threads extend from the blind end of said fastener to a point below the interface of said workpiece; the combination of driving and resisting forming a bulbous member on the blind end of said fastener thereby securing said plurality of workpieces.
Claim 5
Dependent Claim
249 words
A blind fastener assembly for securing a plurality of workpieces together comprising: a central male core member threadably engageable by an outer female nut member completely surrounding said central male core member; said blind fastener having a head portion at one end of said female nut member and a blind portion at the other end which is inserted into the workpiece into the unaccessable blind area of said workpiece; means on the head end of said female nut member of said blind fastener for holding the female nut member; means forming a head portion on said male core member, said means being engageable by a tool whereby said male core member can be rotatably driven into threaded engagement with said female nut member; means on the blind end of said male core member and said female nut member for resisting said driving, said means comprising a portion of the blind end of said male core member having a first plurality of unfinished threads therein and a portion of the blind end of said female nut member having a second plurality of unfinished threads therein, said second plurality being adaptable to being threadably engaged with said first plurality whereby upon threaded engagement said first and second pluralities of unfinished threads extend from the blind end of said fastener to a point below the interface of said workpiece; the combination of driving and resisting forming a bulbous member on the blind end of said fastener thereby securing said plurality of workpieces.
Claim 6
Dependent Claim
26 words
The combination of claim 3 including a collapsing groove in said female nut member thereby decreasing resistance to formation of the bulbous member at said groove.
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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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |