Patent US3159256A successfully refreshed from Google Patents.
US3159256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrap spring clutch
Assignee: Unisys Corp
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Filing: 1961-06-20
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Granted: 1964-12-01
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Expires: 1981-06-20
Abstract
No abstract record available.
Inventors
- 👤 Welsh Herbert Frazer
- 👤 Norman J Appleton
- 👤 Silverberg Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:42
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/10; F16D27/105; F16D13/00; F16D13/02; F16D13/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A WRAP SPRING COMPRISING A HOLLOW CYLINDRICAL INPUT SHAFT, A HOLLOW CYLINDRICAL OUTPUT SHAFT SUBSTANTIALLY COAXIAL WITH SAID INPUT SHAFT AND SPACED AXIALLY THEREFROM, A RATCHET ROTATABLY MOUNTED RELATIVE TO ONE OF SAID SHAFTS, A FIRST SPRING DISPOSED ADJACENT THE EXTERIOR SURFACES OF BOTH SAID INPUT AND OUTPUT SHAFTS AND CONNECTED AT ONE OF ITS ENDS TO SAID RATCHET, A SECOND SPRING DISPOSED TO ENGAGE THE INTERIOR SURFACAE OF BOTH SAID INPUT AND OUTPUT SHAFTS WHEN SAID OUTPUT SHAFT OVERRUNS SAID INPUT SHAFT, SAID SECOND SPRING BEING ATTACHED AT ONE OF ITS ENDS TO ONE OF SAID SHAFTS, DRIVE MEANS COUPLED TO SAID INPUT SHAFT FOR ROTATING SAID INPUT SHAFT AND SIGNAL RESPONSIVE MEANS COUPLED TO SAID RATCHET FOR SELECTIVELY CAUSING SAID FIRST SPRING TO ENGAGE THE EXTERIOR SURFACES OF SAID INPUT AND OUTPUT SHAFTS THEREBY TO TRANSFER THE ROTATION OF SAID INPUT TO SAID OUTPUT SHAFT.
Claim 2
Dependent Claim
147 words
A WRAP SPRING COMPRISING A HOLLOW CYLINDRICAL INPUT SHAFT, A HOLLOW CYLINDRICAL OUTPUT SHAFT SUBSTANTIALLY COAXIAL WITH SAID INPUT SHAFT AND SPACED AXIALLY THEREFROM, A RATCHET ROTATABLY MOUNTED RELATIVE TO ONE OF SAID SHAFTS, A FIRST SPRING DISPOSED ADJACENT THE EXTERIOR SURFACES OF BOTH SAID INPUT AND OUTPUT SHAFTS AND CONNECTED AT ONE OF ITS ENDS TO SAID RATCHET, A SECOND SPRING DISPOSED TO ENGAGE THE INTERIOR SURFACAE OF BOTH SAID INPUT AND OUTPUT SHAFTS WHEN SAID OUTPUT SHAFT OVERRUNS SAID INPUT SHAFT, SAID SECOND SPRING BEING ATTACHED AT ONE OF ITS ENDS TO ONE OF SAID SHAFTS, DRIVE MEANS COUPLED TO SAID INPUT SHAFT FOR ROTATING SAID INPUT SHAFT AND SIGNAL RESPONSIVE MEANS COUPLED TO SAID RATCHET FOR SELECTIVELY CAUSING SAID FIRST SPRING TO ENGAGE THE EXTERIOR SURFACES OF SAID INPUT AND OUTPUT SHAFTS THEREBY TO TRANSFER THE ROTATION OF SAID INPUT TO SAID OUTPUT SHAFT.
References Cited (Backward Citations)
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US2161941A
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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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |