US3221791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nut-type fastener incorporating frustoconical lock and method of fabricating same
Assignee: Rosan Engineering Corp
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Filing: 1963-05-02
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Granted: 1965-12-07
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Expires: 1983-05-02
Abstract
No abstract record available.
Inventors
- 👤 Rosan Jose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:08
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/64; B21K1/70; B21K1/707; F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/30; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/968
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A FASTENER INCLUDING AN ELONGATED BODY HAVING A BORE THEREIN AND EXTENDING AXIALLY OF SAID BODY, THE WALL OF SAID BORE INCORPORATING A THREAD AND SAID BODY HAVING CIRCUMFERENTIALLY CONTINUOUS EXTERNAL WALL WHICH IS TAPERED FROM A POINT INTERMEDIATE THE EXTREMITIES OF SAID BODY TO A POINT ADJACENT ONE OF SAID EXTREMITIES, THE WALL OF SAID BORE BEING CORRESPONDINGLY TAPERED AND ELONGATED TO IMPART A CORRESPONDING UNIFORM RADIALLY INWARD TAPER AND AN ELONGATION TO THE OUTERMOST FOUR THREAD CONVOLUTIONS OF THE TAPERED PORTION, SAID THREAD IN SAID TAPERED PORTION HAVING PROGRESSIVELY SMALLER CREST AND ROOT DIAMETERS FROM SAID INTERMEDIATE POINT TO SAID ONE EXTREMITY, SAID THREAD IN SAID TAPERED PORTION HAVING A GREATER PITCH THAN THE THREAD IN THE UNTAPERED PORTION SO AS TO CREATE A LOCKING AREA UPON SAID THREAD ENGAGEABLE WITH A CORRESPONDING FASTENER.
Claim 2
Dependent Claim
136 words
A FASTENER INCLUDING AN ELONGATED BODY HAVING A BORE THEREIN AND EXTENDING AXIALLY OF SAID BODY, THE WALL OF SAID BORE INCORPORATING A THREAD AND SAID BODY HAVING CIRCUMFERENTIALLY CONTINUOUS EXTERNAL WALL WHICH IS TAPERED FROM A POINT INTERMEDIATE THE EXTREMITIES OF SAID BODY TO A POINT ADJACENT ONE OF SAID EXTREMITIES, THE WALL OF SAID BORE BEING CORRESPONDINGLY TAPERED AND ELONGATED TO IMPART A CORRESPONDING UNIFORM RADIALLY INWARD TAPER AND AN ELONGATION TO THE OUTERMOST FOUR THREAD CONVOLUTIONS OF THE TAPERED PORTION, SAID THREAD IN SAID TAPERED PORTION HAVING PROGRESSIVELY SMALLER CREST AND ROOT DIAMETERS FROM SAID INTERMEDIATE POINT TO SAID ONE EXTREMITY, SAID THREAD IN SAID TAPERED PORTION HAVING A GREATER PITCH THAN THE THREAD IN THE UNTAPERED PORTION SO AS TO CREATE A LOCKING AREA UPON SAID THREAD ENGAGEABLE WITH A CORRESPONDING FASTENER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |