US3358796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction clutch having centrifugally operated ball valve means
Assignee: Twin Disc Inc
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Filing: 1966-05-05
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Granted: 1967-12-19
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Expires: 1986-05-05
Abstract
No abstract record available.
Inventors
- 👤 Conrad R Hilpert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:47
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/28; F16D43/284; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/108; Y10T137/1153
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
CENTRIFUGALLY CONTROLLED, FRICTION CLUTCH MECHANISM COMPRISING: A ROTATABLE DRIVING MEMBER AND A ROTATABLE DRIVEN MEMBER; SLIPPINGLY ENGAGEABLE FRICTION CLUTCH MEANS BETWEEN SAID MEMBERS FOR ESTABLISHING A SLIPPABLE DRIVE CONNECTION THEREBETWEEN; HYDRAULICALLY OPERATED MEANS FOR CAUSING VARIABLE ENGAGEMENT OF SAID FRICTION CLUTCH MEANS; PRESSURE FLUID, CENTRIFUGALLY OPERATED, CONTROL VALVE MEANS IN ONE OF SAID MEMBERS AND RESPONSIVE TO SPEED CHANGES THEREOF, SAID CONTROL VALVE MEANS INCLUDING A VALVE SEAT AND A FIRST RADIALLY SHIFTABLE BALL ADAPTED TO SEALINGLY ENGAGE SAID SEAT TO PREVENT FLOW OF FLUID AND CONTROLLING THE AMOUNT OF FLUID IN SAID HYDRAULICALLY OPERATED MEANS, AND A SECOND BALL FOR ACTING ON SAID FIRST BALL AND RADIALLY SHIFTABLE THEREWITH; EXTERNALLY ACTUATED, FLUID PRESSURE CONTROL MEANS FOR SUPPLYING PRESSURE FLUID TO SAID
Claim 2
Dependent Claim
122 words
CENTRIFUGALLY CONTROLLED, FRICTION CLUTCH MECHANISM COMPRISING: A ROTATABLE DRIVING MEMBER AND A ROTATABLE DRIVEN MEMBER; SLIPPINGLY ENGAGEABLE FRICTION CLUTCH MEANS BETWEEN SAID MEMBERS FOR ESTABLISHING A SLIPPABLE DRIVE CONNECTION THEREBETWEEN; HYDRAULICALLY OPERATED MEANS FOR CAUSING VARIABLE ENGAGEMENT OF SAID FRICTION CLUTCH MEANS; PRESSURE FLUID, CENTRIFUGALLY OPERATED, CONTROL VALVE MEANS IN ONE OF SAID MEMBERS AND RESPONSIVE TO SPEED CHANGES THEREOF, SAID CONTROL VALVE MEANS INCLUDING A VALVE SEAT AND A FIRST RADIALLY SHIFTABLE BALL ADAPTED TO SEALINGLY ENGAGE SAID SEAT TO PREVENT FLOW OF FLUID AND CONTROLLING THE AMOUNT OF FLUID IN SAID HYDRAULICALLY OPERATED MEANS, AND A SECOND BALL FOR ACTING ON SAID FIRST BALL AND RADIALLY SHIFTABLE THEREWITH; EXTERNALLY ACTUATED, FLUID PRESSURE CONTROL MEANS FOR SUPPLYING PRESSURE FLUID TO SAID
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |