US3361235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bidirectional no-back spring clutch
Assignee: Curtiss Wright Corp
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Filing: 1966-06-22
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Granted: 1968-01-02
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Expires: 1986-06-22
Abstract
No abstract record available.
Inventors
- 👤 Columbus R Sacchini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:10
CPC Classifications
F; F16; F16B; F16B1/00; F16B1/02; F16B1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN A SPRING CLUTCH THE COMBINATION COMPRISING AN INPUT SHAFT; AN OUTPUT SHAFT; FIXED STRUCTURE; A HELICAL SPRING SECURED AT ONE END FOR ROTATION WITH THE OUTPUT SHAFT AND FREE AT THE OTHER END, THE SPRING HAVING AN INTERFERENCE FIT WITH THE FIXED STRUCTURE TO THEREBY LOCK THE OUTPUT SHAFT AGAINST ROTATION IN ONE DIRECTION; AN ARM PIVOTALLY MOUNTED ON THE OUTPUT SHAFT; MEANS ON THE INPUT SHAFT TO PIVOT THE ARM UPON ROTATION IN SAID ONE DIRECTION OF THE INPUT SHAFT AND THEREBY CAUSE THE ARM TO ENGAGE THE FREE END OF THE SPRING AT A LOCATION WHICH IS A GREATER DISTANCE FROM THE PIVOTAL AXIS OF THE ARM THAN THE PIVOTING MEANS WHEREBY THE SPRING IS ACTUATED TO UNLOCK THE OUTPUT SHAFT FROM THE FIXED STRUCTURE; AND MEANS ROTATABLE BY THE INPUT SHAFT TO ENGAGE THE OUTPUT SHAFT AND PRODUCE ROTATION OF THE OUTPUT SHAFT WHEN UNLOCKED FROM THE FIXED STRUCTURE.
Claim 2
Dependent Claim
153 words
IN A SPRING CLUTCH THE COMBINATION COMPRISING AN INPUT SHAFT; AN OUTPUT SHAFT; FIXED STRUCTURE; A HELICAL SPRING SECURED AT ONE END FOR ROTATION WITH THE OUTPUT SHAFT AND FREE AT THE OTHER END, THE SPRING HAVING AN INTERFERENCE FIT WITH THE FIXED STRUCTURE TO THEREBY LOCK THE OUTPUT SHAFT AGAINST ROTATION IN ONE DIRECTION; AN ARM PIVOTALLY MOUNTED ON THE OUTPUT SHAFT; MEANS ON THE INPUT SHAFT TO PIVOT THE ARM UPON ROTATION IN SAID ONE DIRECTION OF THE INPUT SHAFT AND THEREBY CAUSE THE ARM TO ENGAGE THE FREE END OF THE SPRING AT A LOCATION WHICH IS A GREATER DISTANCE FROM THE PIVOTAL AXIS OF THE ARM THAN THE PIVOTING MEANS WHEREBY THE SPRING IS ACTUATED TO UNLOCK THE OUTPUT SHAFT FROM THE FIXED STRUCTURE; AND MEANS ROTATABLE BY THE INPUT SHAFT TO ENGAGE THE OUTPUT SHAFT AND PRODUCE ROTATION OF THE OUTPUT SHAFT WHEN UNLOCKED FROM THE FIXED STRUCTURE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |