US3299634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure operable device and control device
Assignee: Individual
•
Filing: 1965-05-05
•
Granted: 1967-01-24
•
Expires: 1985-05-05
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Roemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:23
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/08; B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A FLUID PRESSURE OPERABLE DRIVE DEVICE FOR DRIVING A PAIR OF MEMBERS RELATIVE TO EACH OTHER AND COMPRISING A CYLINDER ADAPTED FOR CONNECTION TO ONE MEMBER; A PISTON RECIPROCABLE IN THE CYLINDER AND ADAPTED FOR CONNECTION TO THE OTHER MEMBER, A CONTINUOUSLY DRIVEN PUMP; A HYDRAULIC FLUID PRESSURE CONDUCTING CIRCUIT CONNECTED TO THE CYLINDER AT ONE SIDE OF THE PISTON AND CONNECTED TO THE DISCHARGE SIDE OF THE PUMP FOR TRANSMITTING TO SAID SIDE OF THE PISTON FLUID AT OPERATING PRESSURE FOR DRIVING THE PISTON IN ONE DIRECTION RELATIVE TO THE CYLINDER ON ITS POWER DRIVING STROKE; A CONTROL VALVE CONNECTED IN SAID CIRCUIT AND OPERABLE WHEN OPEN TO DISCHARGE PRESSURE FLUID THEREFROM AND THEREBY CAUSE THE PRESSURE IN SAID ONE END OF THE CYLINDER TO FALL BELOW OPERATING PRESSURE, AND OPERABLE WHEN DRIVEN A PREDETERMINED DISTANCE IN THE CLOSING DIRECTION TO CAUSE THE PRESSURE IN SAID ONE END TO INCREASE TO OPERATING PRESSURE; CONTROL MEANS OPERATIVELY CONNECTED TO THE PISTON AND DRIVEN THEREBY WHEN THE PISTON MOVES IN SAID ONE DIRECTION; VALVE OPERATING MEANS RENDER OPERATIVE BY OPERATION OF SAID CONTROL MEANS WHEN THE PISTON HAS MOVED TO
Claim 2
Dependent Claim
189 words
A FLUID PRESSURE OPERABLE DRIVE DEVICE FOR DRIVING A PAIR OF MEMBERS RELATIVE TO EACH OTHER AND COMPRISING A CYLINDER ADAPTED FOR CONNECTION TO ONE MEMBER; A PISTON RECIPROCABLE IN THE CYLINDER AND ADAPTED FOR CONNECTION TO THE OTHER MEMBER, A CONTINUOUSLY DRIVEN PUMP; A HYDRAULIC FLUID PRESSURE CONDUCTING CIRCUIT CONNECTED TO THE CYLINDER AT ONE SIDE OF THE PISTON AND CONNECTED TO THE DISCHARGE SIDE OF THE PUMP FOR TRANSMITTING TO SAID SIDE OF THE PISTON FLUID AT OPERATING PRESSURE FOR DRIVING THE PISTON IN ONE DIRECTION RELATIVE TO THE CYLINDER ON ITS POWER DRIVING STROKE; A CONTROL VALVE CONNECTED IN SAID CIRCUIT AND OPERABLE WHEN OPEN TO DISCHARGE PRESSURE FLUID THEREFROM AND THEREBY CAUSE THE PRESSURE IN SAID ONE END OF THE CYLINDER TO FALL BELOW OPERATING PRESSURE, AND OPERABLE WHEN DRIVEN A PREDETERMINED DISTANCE IN THE CLOSING DIRECTION TO CAUSE THE PRESSURE IN SAID ONE END TO INCREASE TO OPERATING PRESSURE; CONTROL MEANS OPERATIVELY CONNECTED TO THE PISTON AND DRIVEN THEREBY WHEN THE PISTON MOVES IN SAID ONE DIRECTION; VALVE OPERATING MEANS RENDER OPERATIVE BY OPERATION OF SAID CONTROL MEANS WHEN THE PISTON HAS MOVED TO
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |