US3270845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Band clutch
Assignee: Individual
•
Filing: 1964-07-09
•
Granted: 1966-09-06
•
Expires: 1984-07-09
Abstract
No abstract record available.
Inventors
- 👤 Dodwell John Major
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:06
CPC Classifications
F; F16; F16D; F16D41/00; F16D41/20; F16D41/203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A BAND FOR ONE-WAY V-PULLEY FRICTION DEVICES COMPRISING AN ELONGATED THIN SPRING METAL STRIP, PRECURVED INTO A GENERALLY FLAT RADIAL SPIRAL SHAPE TAPERED IN WIDTH ALONG ITS LENGTH FROM ADJACENT ITS OUTER END TO ITS INNER END TO PROVIDE A PAIR OF PROGRESSIVELY CLOSER SIDE EDGES FOR PROGRESSIVELY DEEPER CO-OPERATION WITH THE SIDEWALLS OF A V-PULLEY, SECURING MEANS ON THE STRIP ADJACENT ITS OUTER END, SAID SIDE EDGES BEING BEVELED AT THEIR RADIALLY INNERMOST CORNERS TO CONFORM TO SAID V-PULLEY AND BEING RELIEVED AT THEIR OUTERMOST CORNERS.
Claim 2
Dependent Claim
87 words
A BAND FOR ONE-WAY V-PULLEY FRICTION DEVICES COMPRISING AN ELONGATED THIN SPRING METAL STRIP, PRECURVED INTO A GENERALLY FLAT RADIAL SPIRAL SHAPE TAPERED IN WIDTH ALONG ITS LENGTH FROM ADJACENT ITS OUTER END TO ITS INNER END TO PROVIDE A PAIR OF PROGRESSIVELY CLOSER SIDE EDGES FOR PROGRESSIVELY DEEPER CO-OPERATION WITH THE SIDEWALLS OF A V-PULLEY, SECURING MEANS ON THE STRIP ADJACENT ITS OUTER END, SAID SIDE EDGES BEING BEVELED AT THEIR RADIALLY INNERMOST CORNERS TO CONFORM TO SAID V-PULLEY AND BEING RELIEVED AT THEIR OUTERMOST CORNERS.
References Cited (Backward Citations)
US3012637A
Cited
US3117660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |