US3610100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescopic actuator
Assignee: Bank of New England NA
•
Filing: 1969-06-12
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Granted: 1971-10-05
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Expires: 1989-06-12
Abstract
Abstract A HYDRAULIC ACTUATOR OF THE TYPE HAVING MULTIPLE PISTON AND CYLINDERS WITH PORTING AND PASSAGES BEING PROVIDED SO THAT EACH TELESCOPIC SECTION MAY BE INDEPENDENTLY EXTENDED WITH RESPECT TO THE OTHER, WITH A PILOT OPERATED CHECK VALVE IN ONE OF THE PISTIONS PROVIDING SELECTIVE COM- MUNICATION BETWEEN THE FLUID CHAMBERS AND AN EXTERNAL PILOT OPERATED CHECK VALVE FOR RECIRCULATING FLUID UNDER LOW PRESSURE TO AN EXTENDING PORTION OF THE ACTUATOR ASSEMBLY.
Inventors
- 👤 Robert L Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:39
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/16
Claims Analysis
Total Claims: 0
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References 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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |