Patent US3246572A successfully refreshed from Google Patents.
US3246572A
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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
2026-10-27 12:07
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)
US1326228A
Cited
US2917027A
Cited
US3031869A
Cited
US3110228A
Cited
US3174406A
Cited
US3103853A
Cited
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 |