Patent US2653156A successfully refreshed from Google Patents.
Patent US3264942A successfully refreshed from Google Patents.
US3264942A
Expired / Lapsed
US
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Hydraulic cushion assembly
Assignee: WITT MACHINE CO Inc
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Filing: 1964-05-18
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Granted: 1966-08-09
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Expires: 1984-05-18
Abstract
No abstract record available.
Inventors
- 👤 Kenneth F Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:35
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/046; F15B11/048; F15B2211/00; F15B2211/40; F15B2211/405; F15B2211/41; F15B2211/413; F15B2211/415; F15B2211/41527; F15B2211/41536; F15B2211/42; F15B2211/428; F15B2211/60; F15B2211/625; F15B2211/70; F15B2211/755
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A HYDRAULIC SYSTEM OF THE TYPE COMPRISING A HYDRAULIC PUMP FOR GENERATING FORCE; A DOUBLE ACTING WORK CYLINDER HAVING A PISTON FOR PERFORMING MECHANICAL WORK, HYDRAULIC CONDUITS CONNECTING EACH OPPOSITE END OF SAID CYLINDER WITH SAID PUMP AND CONTROL MECHANISM, ASSOCIATED WITH SAID PUMP, FOR SELECTIVELY STOPPING, OR REVERSING, THE FLOW OF INCOMPRESSIBLE HYDRAULIC FLUID FILLING SAID SYSTEM, THE COMBINATION OF: A REMOTE, HYDRAULIC CUSHION ASSEMBLY FOR REDUCING SHOCK TO SAID SYSTEM CAUSED BY STOPPAGE, OR DIRECTION CHANGE, OF A LOADED PISTON AT ANY LOCATION ALONG SAID CYLINDER, SAID ASSEMBLY COMPRISING: A DOUBLE ACTING, CUSHION CYLINDER HAVING A CENTRALLY DISPOSED PISTON CHAMBER THEREWITHIN, AND HAVING A PAIR OF VALVE BORES, EACH BORE OPENING INTO SAID CHAMBER AT AN OPPOSITE END OF SAID CYLINDER;
Claim 2
Dependent Claim
124 words
IN A HYDRAULIC SYSTEM OF THE TYPE COMPRISING A HYDRAULIC PUMP FOR GENERATING FORCE; A DOUBLE ACTING WORK CYLINDER HAVING A PISTON FOR PERFORMING MECHANICAL WORK, HYDRAULIC CONDUITS CONNECTING EACH OPPOSITE END OF SAID CYLINDER WITH SAID PUMP AND CONTROL MECHANISM, ASSOCIATED WITH SAID PUMP, FOR SELECTIVELY STOPPING, OR REVERSING, THE FLOW OF INCOMPRESSIBLE HYDRAULIC FLUID FILLING SAID SYSTEM, THE COMBINATION OF: A REMOTE, HYDRAULIC CUSHION ASSEMBLY FOR REDUCING SHOCK TO SAID SYSTEM CAUSED BY STOPPAGE, OR DIRECTION CHANGE, OF A LOADED PISTON AT ANY LOCATION ALONG SAID CYLINDER, SAID ASSEMBLY COMPRISING: A DOUBLE ACTING, CUSHION CYLINDER HAVING A CENTRALLY DISPOSED PISTON CHAMBER THEREWITHIN, AND HAVING A PAIR OF VALVE BORES, EACH BORE OPENING INTO SAID CHAMBER AT AN OPPOSITE END OF SAID CYLINDER;
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |