Patent US3340920A successfully refreshed from Google Patents.
US3340920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevailing torque locknut
Assignee: RBS INDUSTRIES Inc A CORP OF
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Filing: 1964-11-06
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Granted: 1967-09-12
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Expires: 1984-11-06
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:34
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/284
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A PREVAILING TORQUE FASTENER COMPRISING A BODY HAVING SIX SIDE FACES THAT DEFINE A SUBSTANTIALLY HEXAGONAL PERIPHERY, A CENTRAL THREADED BORE, AND A UNIFORMLYUPWARDLY-FACING TOP FACE THAT INTERSECTS THE SIDE FACES AND TERMINATES RADIALLY INWARDLY THEREOF ADJACENT THE THREADED BORE, THE TOP FACE, SIDE FACES, AND THREADED BORE DEFINING, IN THE BODY, A SIDE WALL EXTENDING SUBSTANTIALLY THE ENTIRE AXIAL LENGTH OF THE THREADED BORE AND HAVING A PERIPHERALLY VARYING EFFECTIVE WALL THICKNESS INCLUDING PERIPHERALLY SPACED ZONES OF MINIMUM WALL THICKNESS; A RESILIENT LOCKING CONSTRUCTION COMPRISING: AT LEAST AN AXIAL PORTION OF THE THREADED BORE ADJACENT ONE END THEREOF BEING SUBSTANTIALLY ELLIPTICAL IN PERIPHERAL CONFIGURATION AND DEFINING MAJOR AND MINOR AXES, SAID
Claim 2
Dependent Claim
113 words
IN A PREVAILING TORQUE FASTENER COMPRISING A BODY HAVING SIX SIDE FACES THAT DEFINE A SUBSTANTIALLY HEXAGONAL PERIPHERY, A CENTRAL THREADED BORE, AND A UNIFORMLYUPWARDLY-FACING TOP FACE THAT INTERSECTS THE SIDE FACES AND TERMINATES RADIALLY INWARDLY THEREOF ADJACENT THE THREADED BORE, THE TOP FACE, SIDE FACES, AND THREADED BORE DEFINING, IN THE BODY, A SIDE WALL EXTENDING SUBSTANTIALLY THE ENTIRE AXIAL LENGTH OF THE THREADED BORE AND HAVING A PERIPHERALLY VARYING EFFECTIVE WALL THICKNESS INCLUDING PERIPHERALLY SPACED ZONES OF MINIMUM WALL THICKNESS; A RESILIENT LOCKING CONSTRUCTION COMPRISING: AT LEAST AN AXIAL PORTION OF THE THREADED BORE ADJACENT ONE END THEREOF BEING SUBSTANTIALLY ELLIPTICAL IN PERIPHERAL CONFIGURATION AND DEFINING MAJOR AND MINOR AXES, SAID
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |