Patent US3082746A successfully refreshed from Google Patents.
US3082746A
Expired / Lapsed
US
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Fluid operated ram
Assignee: Stothert and Pitt Ltd
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Filing: 1960-06-30
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Granted: 1963-03-26
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Expires: 1980-06-30
Abstract
No abstract record available.
Inventors
- 👤 Kerridge Norman Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:32
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/82; F; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B15/224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A FLUID OPERATED DOUBLE ACTING RAM COMPRISING A RAM CYLINDER HAVING FLUID INLET AND OUTLET PORTS COMMUNICATING WITH THE ENDS THEREOF, PILOT OPERATED VALVES CONTROLLING SAID PORTS, A RAM PISTON MOUNTED FOR AXIAL MOVEMENT WITHIN SAID CYLINDER, A PISTON ROD CARRYING SAID PISTON AND HAVING AN END EXTENDING THROUGH AND BEYOND ONE END OF SAID CYLINDER, AND VALVE MEANS CARRIED BY SAID PROJECTING END OF SAID PISTON ROD AND CONTROLLING COMMUNICATION BETWEEN SAID ENDS OF SAID CYLINDER TO LIMIT MAXIMUM DIFFERENTIAL PRESSURES ON OPPOSITE SIDES OF SAID PISTON FOR CONTROLLING THE MAXIMUM ACCELERATION THEREOF.
Claim 2
Dependent Claim
94 words
A FLUID OPERATED DOUBLE ACTING RAM COMPRISING A RAM CYLINDER HAVING FLUID INLET AND OUTLET PORTS COMMUNICATING WITH THE ENDS THEREOF, PILOT OPERATED VALVES CONTROLLING SAID PORTS, A RAM PISTON MOUNTED FOR AXIAL MOVEMENT WITHIN SAID CYLINDER, A PISTON ROD CARRYING SAID PISTON AND HAVING AN END EXTENDING THROUGH AND BEYOND ONE END OF SAID CYLINDER, AND VALVE MEANS CARRIED BY SAID PROJECTING END OF SAID PISTON ROD AND CONTROLLING COMMUNICATION BETWEEN SAID ENDS OF SAID CYLINDER TO LIMIT MAXIMUM DIFFERENTIAL PRESSURES ON OPPOSITE SIDES OF SAID PISTON FOR CONTROLLING THE MAXIMUM ACCELERATION THEREOF.
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) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |