US3564842A
Expired / Lapsed
US
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Control system for fluid-operated positioning mechanism
Assignee: Aviolanda Maalschappij voor Vliegtuigbouw NV
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Filing: 1968-07-09
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Granted: 1971-02-23
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Expires: 1988-07-09
Abstract
Abstract A FLUID POWER OPERATED CONTROL SYSTEM FOR OPERATING A MECHANISM INCLUDING AN ELEMENT ADAPTED TO BE SUBJECTED TO AN AUTOMATICALLY PROCEEDING MOVEMENT UNDER THE CONTROL OF SAID CONTROL SYSTEM, CHARACTERIZED BY A METERING CYLINDER INCLUDED IN THE POWER FLUID CIRCUIT WHICH CONTROLS THE MOVEMENT OF SAID ELEMENT, SAID METERING CYLINDER BEING ARRANGED, AFTER THE ADJUSTMENT OF AN ENERGIZING COMMAND CIRCUIT, TO ALLOW A LIMITED QUANTITY OF POWER FLUID TO FLOW THROUGH SAID POWER FLUID CIRCUIT, AND TO ALLOW THE THROUGHFLOW OF A FURTHER LIKE LIMITED QUANTITY OF POWER FLUID ONLY AFTER A MUTATION IN SAID COMMAND CIRCUIT.
Inventors
- 👤 Nicolaas G J W Van Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:42
CPC Classifications
F; F15; F15B; F15B20/00; F15B11/00; F15B11/08; F15B2211/00; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/40576; F15B2211/415; F15B2211/41527; F15B2211/42; F15B2211/421; F15B2211/422; F15B2211/426; F15B2211/428; F15B2211/455; F15B2211/46; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7052; F15B2211/765; F15B2211/7656; F15B2211/80; F15B2211/86; F15B2211/863
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |