Fluid force applying device
Abstract
Abstract A FORCE APPLYING DEVICE HAVING A PISTON AND CYLINDER ASSEMBLY, A GUIDE MEMBER POSITIONED IN THE CYLINDER AND SLIDABLY ENGAGEABLE WITH A BORE PROVIDED IN THE PISTON. A PAIR OF NON-INTERSECTING CAM SLOTS PROVIDED IN ONE OF SAID GUIDE MEMBER AND PISTON ASSEMBLY AND A CAM FOLLOWER PROVIDED IN THE OTHER OF SAID GUIDE MEMBER AND PISTON ASSEMBLY, THE CAM FOLLOWER BEING SELECTIVELY ENGAGEABLE WITH ONE OF SAID CAM SLOTS TO GUIDE SAID PISTON ASSEMBLY IN ITS MOVEMENT IN SAID CYLINDER, AND A FIRST RETURN SPRING PROVIDED BETWEEN SAID CYLINDER AND PISTON ASSEMBLY AND A SECOND RETURN SPRING PROVIDED BETWEEN SAID GUIDE MEMBER AND SAID PISTON ASSEMBLY. THE FIRST AND SECOND SPRINGS ARE SEATED ON THRUST BEARINGS PROVIDED AT ONE END OF EACH SPRING.
Inventors
- 👤 Donald W Sessody
Bibliographic Details
Claims Analysis
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |