US3187871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal clutch
Assignee: Ohlsson and Rice Inc
•
Filing: 1961-05-26
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Granted: 1965-06-08
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Expires: 1981-05-26
Abstract
No abstract record available.
Inventors
- 👤 Henry T M Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:24
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/02; F16D43/04; F16D43/14; F16D43/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN A CLUTCH: A DRIVING MEMBER; A DRIVEN MEMBER HAVING AN INTERNAL SURFACE; OPPOSED CLUTCH SHOES HAVING OUTER CLUTCH SURFACES CONFORMING TO THE CURVATURE OF SAID INTERNAL SURFACE AND MOVABLE OUTWARDLY BY CENTRIFUGAL FORCE INTO ENGAGEMENT WITH SAID DRIVEN MEMBER SURFACE; SAID DRIVING MEMBER HAVING SURFACES FOR EACH SHOE CONVERGING TOWARD EACH OTHER IN AN OUTWARD TRANSVERSE DIRECTION AND ENGAGEABLE WITH COMPANION CONVERGING SURFACES ON SAID SHOE; SAID DRIVING MEMBER CONVERGING SURFACES ENGAGING COMPANION SURFACES ON SAID SHOES TO DRIVABLY ENGAGE THE OUTER SURFACES OF SAID SHOES WITH SAID DRIVE MEMBER INTERNAL SURFACE; AND SPRING MEANS SECURED TO SAID SHOES AND PASSING THROUGH SAID DRIVING MEMBER IN THE PLANE OF ENGAGEMENT OF SAID DRIVING MEMBER WITH SAID SHOES NORMAL TO THE AXIS OF SAID DRIVING MEMBER FOR RESISTING CENTRIFUGAL FORCE ACTING ON SAID SHOES AND FOR SHIFTING SAID SHOES INWARDLY TO ENGAGE SAID CONVERGING SHOE SURFACES WITH COMPANION DRIVING MEMBER SURFACES AND CENTER SAID SHOES ON SAID DRIVING MEMBER OUT OF ENGAGEMENT WITH SAID DRIVEN MEMBER.
Claim 2
Dependent Claim
166 words
IN A CLUTCH: A DRIVING MEMBER; A DRIVEN MEMBER HAVING AN INTERNAL SURFACE; OPPOSED CLUTCH SHOES HAVING OUTER CLUTCH SURFACES CONFORMING TO THE CURVATURE OF SAID INTERNAL SURFACE AND MOVABLE OUTWARDLY BY CENTRIFUGAL FORCE INTO ENGAGEMENT WITH SAID DRIVEN MEMBER SURFACE; SAID DRIVING MEMBER HAVING SURFACES FOR EACH SHOE CONVERGING TOWARD EACH OTHER IN AN OUTWARD TRANSVERSE DIRECTION AND ENGAGEABLE WITH COMPANION CONVERGING SURFACES ON SAID SHOE; SAID DRIVING MEMBER CONVERGING SURFACES ENGAGING COMPANION SURFACES ON SAID SHOES TO DRIVABLY ENGAGE THE OUTER SURFACES OF SAID SHOES WITH SAID DRIVE MEMBER INTERNAL SURFACE; AND SPRING MEANS SECURED TO SAID SHOES AND PASSING THROUGH SAID DRIVING MEMBER IN THE PLANE OF ENGAGEMENT OF SAID DRIVING MEMBER WITH SAID SHOES NORMAL TO THE AXIS OF SAID DRIVING MEMBER FOR RESISTING CENTRIFUGAL FORCE ACTING ON SAID SHOES AND FOR SHIFTING SAID SHOES INWARDLY TO ENGAGE SAID CONVERGING SHOE SURFACES WITH COMPANION DRIVING MEMBER SURFACES AND CENTER SAID SHOES ON SAID DRIVING MEMBER OUT OF ENGAGEMENT WITH SAID DRIVEN MEMBER.
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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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |