US3301367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double hydraulic operated clutch having low pressure fluid plate cooling means
Assignee: Twin Disc Inc
•
Filing: 1965-02-11
•
Granted: 1967-01-31
•
Expires: 1985-02-11
Abstract
No abstract record available.
Inventors
- 👤 Edward C Yokel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:33
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/12; F16D25/123; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638; F16D25/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A HYDRAULICALLY OPERATED CLUTCH MECHANISM COMPRISING A PAIR OF AXIALLY SPACED CLUTCHES HAVING A COMMON SHAFT; A MAIN FORCE PISTON AXIALLY SHIFTABLE ON THE SHAFT BETWEEN SAID CLUTCHES FOR SELECTIVE ACTUATION THEREOF; AN ANNULAR REACTION MEMBER WITHIN SAID FORCE PISTON AND FIXED ON SAID SHAFT TO DEFINE A PAIR OF LARGE, VARIABLE VOLUME, PRESSURE FLUID CHAMBERS, ONE ADJACENT EACH CLUTCH WHEREBY EXPANSION OF A CHAMBER ACTUATES THE ADJACENT CLUTCH; A RELATIVELY HIGH PRESSURE FLUID SUPPLY PASSAGE FOR EACH OF SAID CHAMBERS; A RELATIVELY LOW PRESSURE FLUID EXHAUST PORT BETWEEN EACH OF SAID CHAMBERS AND THE CLUTCH PLATES OF THE CLUTCH AXIALLY REMOTE
Claim 2
Dependent Claim
102 words
A HYDRAULICALLY OPERATED CLUTCH MECHANISM COMPRISING A PAIR OF AXIALLY SPACED CLUTCHES HAVING A COMMON SHAFT; A MAIN FORCE PISTON AXIALLY SHIFTABLE ON THE SHAFT BETWEEN SAID CLUTCHES FOR SELECTIVE ACTUATION THEREOF; AN ANNULAR REACTION MEMBER WITHIN SAID FORCE PISTON AND FIXED ON SAID SHAFT TO DEFINE A PAIR OF LARGE, VARIABLE VOLUME, PRESSURE FLUID CHAMBERS, ONE ADJACENT EACH CLUTCH WHEREBY EXPANSION OF A CHAMBER ACTUATES THE ADJACENT CLUTCH; A RELATIVELY HIGH PRESSURE FLUID SUPPLY PASSAGE FOR EACH OF SAID CHAMBERS; A RELATIVELY LOW PRESSURE FLUID EXHAUST PORT BETWEEN EACH OF SAID CHAMBERS AND THE CLUTCH PLATES OF THE CLUTCH AXIALLY REMOTE
References Cited (Backward Citations)
US2386220A
Cited
US3017006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |