Control system for the ram of vertically disposed fluid pressure cylinders
Abstract
Abstract A SYSTEM FOR OPERATING FLUID PRESSURE CYLINDERS, PARTICULARLY CYLINDERS POWERED BY COMPRESSIBLE GASES IN WHICH THE CYLINDER IS ARRANGED VERTICALLY SO THAT ON ITS WORKING STROKE THE RAM OF THE CYLINDER MOVES DOWNWARDLY. A CONTROL SYSTEM FOR THE CYLINDER INTERCONNECTS THE ENDS OF THE CYLINDER ON TE DOWNWARD STROKE OF THE RAM SO THAT THE FLUID UNDER PRESSURE IN THE LOWER END AND WHICH HAS BEEN USED TO RAISE THE RAM FLOWS INTO THE UPPER END SO THAT THE RAM FALLS DOWNWARDLY BY GRAVITY. BY THUS INTERCONNECTING THE ENDS OF THE CYLINDER AT THE TIME INDICATED THE RAM MOVES DOWN, ON ITS WORKING STROKE, WITHOUT BEING CONNECTED TO THE SOURCE OF GAS UNDER PRESSURE. FURTHER DETAILS INCLUDE MEANS TO ADMIT GAS UNDER PRESSURE TO THE UPPER END OF THE CYLINDER WHEN THE INTERCONNECTING PROCEDURE IS INSUFFICIENT TO CAUSE THE RAM TO COMPLETE ITS WORKING STROKE.
Inventors
- 👤 William C Pease
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |