US3332295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ratchet mechanism
Assignee: Lowell Wrench Co
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Filing: 1965-03-01
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Granted: 1967-07-25
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Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry S Cummings
- 👤 Campanile Dominic
- 👤 Philip H Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:25
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/46; B25B13/461; B25B13/468; B25B13/462; B25B13/463; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1558; Y10T74/1577; Y10T74/1579
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A RATCHET MECHANISM, COMPRISING (A) A RATCHET WHEEL HAVING RELATIVELY COARSE TEETH FORMED ON ITS OUTER PERIPHERY, AND (B) A PAWL CONSISTING OF A PLURALITY OF PAWL ELEMENTS MOUNTED ON A COMMON PIVOT HAVING DIFFERENT LENGTHS WHEREBY, DURING MOTION IN ONE DIRECTION, THE PAWL ELEMENTS MOVE UP THE FORWARD SURFCE OF A GIVEN TOOTH UNTIL THE SHORTEST PAWL ELEMENT PASSES OVER THE TOP OF THE TOOTH INTO THE VALLEY BEYOND AND, UPON REVERSE RELATIVE ROTATION, THE SAID SHORTEST PAWL, ELEMENT PRESSES AGAINST THE BACK SURFACE OF THE SAID GIVEN TOOTH AND MOVES THE RATCHET WHEEL FORWARD BY AN INCREMENT, AND WHEREBY, DURING THE NEXT RELATIVE ROTATION IN THE FIRST DIRECTION A SECOND PAWL ELEMENT PASSES OVER THE TOP OF THE TOOTH TO ENGAGE THE BACK SURFACE OF THE TOOTH DURING A SUBSEQUENT RELATIVE ROTATION IN THE OTHER DIRECTION, SO THAT THE RACKET WHEEL IS MOVED IN A PLURALITY OF SMALL INCREMENTS SUBSTANTIALLY SMALLER THAN THE DISTANCE BETWEEN SUCCESSIVE TEETH ON THE PERIPHERY OF THE RATCHET WHEEL.
Claim 2
Dependent Claim
166 words
A RATCHET MECHANISM, COMPRISING (A) A RATCHET WHEEL HAVING RELATIVELY COARSE TEETH FORMED ON ITS OUTER PERIPHERY, AND (B) A PAWL CONSISTING OF A PLURALITY OF PAWL ELEMENTS MOUNTED ON A COMMON PIVOT HAVING DIFFERENT LENGTHS WHEREBY, DURING MOTION IN ONE DIRECTION, THE PAWL ELEMENTS MOVE UP THE FORWARD SURFCE OF A GIVEN TOOTH UNTIL THE SHORTEST PAWL ELEMENT PASSES OVER THE TOP OF THE TOOTH INTO THE VALLEY BEYOND AND, UPON REVERSE RELATIVE ROTATION, THE SAID SHORTEST PAWL, ELEMENT PRESSES AGAINST THE BACK SURFACE OF THE SAID GIVEN TOOTH AND MOVES THE RATCHET WHEEL FORWARD BY AN INCREMENT, AND WHEREBY, DURING THE NEXT RELATIVE ROTATION IN THE FIRST DIRECTION A SECOND PAWL ELEMENT PASSES OVER THE TOP OF THE TOOTH TO ENGAGE THE BACK SURFACE OF THE TOOTH DURING A SUBSEQUENT RELATIVE ROTATION IN THE OTHER DIRECTION, SO THAT THE RACKET WHEEL IS MOVED IN A PLURALITY OF SMALL INCREMENTS SUBSTANTIALLY SMALLER THAN THE DISTANCE BETWEEN SUCCESSIVE TEETH ON THE PERIPHERY OF THE RATCHET WHEEL.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |