Patent US3335836A successfully refreshed from Google Patents.
US3335836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accumulator for clutch actuating pistons
Assignee: Caterpillar Inc
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Filing: 1966-03-07
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Granted: 1967-08-15
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Expires: 1986-03-07
Abstract
No abstract record available.
Inventors
- 👤 Lawrence B Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:08
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN A DISC-TYPE CLUTCH IN WHICH ENGAGEMENT IS CAUSED BY A PISTON COMPRISING A STACK OF DISCS, CYLINDER IN WHICH SAID PISTON IS SLIDABLY RECEIVED, MEANS TO DIRECT FLUID UNDER PRESSURE TO THE CYLINDER TO CAUSE COMPRESSION OF THE STACK OF DISCS, AND ACCUMULATOR MEANS TO REDUCE SHOCK
Claim 2
Dependent Claim
48 words
IN A DISC-TYPE CLUTCH IN WHICH ENGAGEMENT IS CAUSED BY A PISTON COMPRISING A STACK OF DISCS, CYLINDER IN WHICH SAID PISTON IS SLIDABLY RECEIVED, MEANS TO DIRECT FLUID UNDER PRESSURE TO THE CYLINDER TO CAUSE COMPRESSION OF THE STACK OF DISCS, AND ACCUMULATOR MEANS TO REDUCE SHOCK
References Cited (Backward Citations)
US2588724A
Cited
US2755903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |