Patent US1328104A successfully refreshed from Google Patents.
Patent US3098549A successfully refreshed from Google Patents.
US3098549A
Expired / Lapsed
US
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Double acting hydraulic actuator
Assignee: Allis Chalmers Corp
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Filing: 1961-09-26
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Granted: 1963-07-23
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Expires: 1981-09-26
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Schick
- 👤 Charles L Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:58
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/10; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A DOUBLE ACTING HYDRAULIC ACTUATOR FOR SELECTIVELY ENGAGING A PAIR OF CLUTCH PACKS OPERATIVELY INTERPOSED BETWEEN A SHAFT MEMBER AND GEARING ROTATABLY MOUNTED ON SAID SHAFT MEMBER, COMPRISING: A CYLINDRICAL PISTON HAVING OPPOSITE ENDS IN AXIALLY CONFRONTING RELATION TO SAID CLUTCH PACKS, RESPECTIVELY, AND MOUNTED COAXIALLY ON SAID SHAFT MEMBER FOR AXIAL MOVEMENT RELATIVE THERETO BETWEEN POSTIONS OF ENGAGEMENT WITH SAID CLUTCH PACKS; A REACTION MEMBER WITHIN SAID CYLINDRICAL PISTON DIVIDING EACH END OF THE LATTER INTO RADIALLY INNER AND OUTER CHAMBERS; FLUID PASSAGE MEANS BETWEEN ONE OF THE PAIRS OF INNER AND OUTER CHAMBERS INCLUDING A PASSAGEWAY IN SAID REACTION MEMBER; MEANS FOR CONTROLLING FLUID FLOW THROUGH SAID PASSAGEWAY INCLUDING A PAIR OF AXIALLY
Claim 2
Dependent Claim
115 words
A DOUBLE ACTING HYDRAULIC ACTUATOR FOR SELECTIVELY ENGAGING A PAIR OF CLUTCH PACKS OPERATIVELY INTERPOSED BETWEEN A SHAFT MEMBER AND GEARING ROTATABLY MOUNTED ON SAID SHAFT MEMBER, COMPRISING: A CYLINDRICAL PISTON HAVING OPPOSITE ENDS IN AXIALLY CONFRONTING RELATION TO SAID CLUTCH PACKS, RESPECTIVELY, AND MOUNTED COAXIALLY ON SAID SHAFT MEMBER FOR AXIAL MOVEMENT RELATIVE THERETO BETWEEN POSTIONS OF ENGAGEMENT WITH SAID CLUTCH PACKS; A REACTION MEMBER WITHIN SAID CYLINDRICAL PISTON DIVIDING EACH END OF THE LATTER INTO RADIALLY INNER AND OUTER CHAMBERS; FLUID PASSAGE MEANS BETWEEN ONE OF THE PAIRS OF INNER AND OUTER CHAMBERS INCLUDING A PASSAGEWAY IN SAID REACTION MEMBER; MEANS FOR CONTROLLING FLUID FLOW THROUGH SAID PASSAGEWAY INCLUDING A PAIR OF AXIALLY
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) | 1966-07-22 | 1967-01-21 | 1967-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-22 | 1971-01-21 | 1971-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-22 | 1975-01-21 | 1975-07-23 | $7700.00 | Window Closed / Lapsed |