US3246572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid control apparatus
Assignee: Parker Hannifin Corp
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Filing: 1964-11-23
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Granted: 1966-04-19
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Expires: 1984-11-23
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Ogilvie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:00
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B11/12; F15B11/121; F15B11/126; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638; Y10T137/86646; Y10T137/86662
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A FLUID ACTUATED SERVO VALVE COMPRISING: A VALVE BODY HAVING A ROW OF CLOSELY SPACED PORTS AT ONE END OF THE BODY; A MOVABLE CONTROL MEMBER WITHIN SAID VALVE BODY AND INCLUDING AN ACTUATING ROD MEMBER PROJECTING THROUGH AN END OF THE VALVE BODY AND HAVING SPACED PISTONS, A FIRST ONE OF SAID PISTONS BEING DISPOSED AT ONE END OF THE ROD WITHIN THE VALVE BODY AND A SECOND PISTON BEING LOCATED ON THE ROD AWAY FROM THE FIRST PISTON AND MOVABLE ALONG A SUBSTANTIAL LENGTH OF THE ROW OF CLOSELY SPACED PORTS; AN EXHAUST PORT LOCATED IN THE VALVE BODY BETWEEN THE TWO PISTONS THROUGHOUT THE LENGTH OF TRAVEL OF SAID TWO PISTONS; A PRESSURE PORT LOCATED IN THE VALVE BODY BETWEEN THE ROW OF CLOSELY SPACED PORTS AND SAID ONE END OF THE VALVE BODY; AND A HYDRAULIC SUPPLY PORT LOCATED IN THE VALVE BODY BETWEEN THE FIRST PISTON AND THE OTHER END OF SAID VALVE BODY.
Claim 2
Dependent Claim
159 words
A FLUID ACTUATED SERVO VALVE COMPRISING: A VALVE BODY HAVING A ROW OF CLOSELY SPACED PORTS AT ONE END OF THE BODY; A MOVABLE CONTROL MEMBER WITHIN SAID VALVE BODY AND INCLUDING AN ACTUATING ROD MEMBER PROJECTING THROUGH AN END OF THE VALVE BODY AND HAVING SPACED PISTONS, A FIRST ONE OF SAID PISTONS BEING DISPOSED AT ONE END OF THE ROD WITHIN THE VALVE BODY AND A SECOND PISTON BEING LOCATED ON THE ROD AWAY FROM THE FIRST PISTON AND MOVABLE ALONG A SUBSTANTIAL LENGTH OF THE ROW OF CLOSELY SPACED PORTS; AN EXHAUST PORT LOCATED IN THE VALVE BODY BETWEEN THE TWO PISTONS THROUGHOUT THE LENGTH OF TRAVEL OF SAID TWO PISTONS; A PRESSURE PORT LOCATED IN THE VALVE BODY BETWEEN THE ROW OF CLOSELY SPACED PORTS AND SAID ONE END OF THE VALVE BODY; AND A HYDRAULIC SUPPLY PORT LOCATED IN THE VALVE BODY BETWEEN THE FIRST PISTON AND THE OTHER END OF SAID VALVE BODY.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |