Patent US3217745A successfully refreshed from Google Patents.
US3217745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic fluid control operating valve
Assignee: Individual
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Filing: 1963-06-10
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Granted: 1965-11-16
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Expires: 1983-06-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Fred W Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:40
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/10; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0402; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/86702; Y10T137/87169; Y10T137/87217; Y10T137/87225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A VALVE CONSTRUCTION COMPRISING A VALVE BODY DEFINING AN ELONGATED VALVE CHAMBER, A VALVE SPINDLE ASSEMBLY RECIPROCABLY DISPOSED WITHIN SAID CHAMBER, SAID ASSEMBLY INCLUDING A PISTON VALVE MEMBER AND A SLEEVE VALVE MEMBER, SAID PISTON VALVE MEMBER AND SLEEVE VALVE MEMBER HAVING SLIDABLY INTERLATED COMPONENTS FOR MOVEMENT IN RELATION TO EACH OTHER, AND A PUSHER PISTON ASSEMBLY SLIDABLY INTERRELATED WITH SAID SLEEVE VALVE MEMBER AND ENGAGEABLE THEREWITH FOR MOVING THE SLEEVE VALVE MEMBER IN RELATION TO THE PISTON VALVE MEMBER, SAID VALVE CHAMBER INCLUDING AN INLET PORT ADJACENT ONE END, IN EXHAUST PORT ADJACENT THE OTHER END AND A CENTRALLY DISPOSED POWER OUTLET PORT, SAID PISTON VALVE MEMBER SELECTIVELY OPENING AND CLOSING THE INLET PORT, SAID SLEEVE VALVE MEMBER SELECTIVELY OPENING AND CLOSING THE EXHAUST PORT, SAID VALVE SPINDLE ASSEMBLY BEING MOVABLE TO AN EXHAUST POSITION, A POWER POSITION AND A HOLD MID-POSITION, SAID PUSHER PISTON ASSEMBLY INCLUDING MEANS FOR VENTING PRESSURE BUILD-UP WHEN THE VALVE SPINDLE ASSEMBLY IS MOVED TO A HOLD MID-POSITION THEREBY ENABLING ELIMINATION OF THE BUILT-UP PRESSURE WITHOUT DRIFT OF THE SPINDLE ASSEMBLY.
Claim 2
Dependent Claim
177 words
A VALVE CONSTRUCTION COMPRISING A VALVE BODY DEFINING AN ELONGATED VALVE CHAMBER, A VALVE SPINDLE ASSEMBLY RECIPROCABLY DISPOSED WITHIN SAID CHAMBER, SAID ASSEMBLY INCLUDING A PISTON VALVE MEMBER AND A SLEEVE VALVE MEMBER, SAID PISTON VALVE MEMBER AND SLEEVE VALVE MEMBER HAVING SLIDABLY INTERLATED COMPONENTS FOR MOVEMENT IN RELATION TO EACH OTHER, AND A PUSHER PISTON ASSEMBLY SLIDABLY INTERRELATED WITH SAID SLEEVE VALVE MEMBER AND ENGAGEABLE THEREWITH FOR MOVING THE SLEEVE VALVE MEMBER IN RELATION TO THE PISTON VALVE MEMBER, SAID VALVE CHAMBER INCLUDING AN INLET PORT ADJACENT ONE END, IN EXHAUST PORT ADJACENT THE OTHER END AND A CENTRALLY DISPOSED POWER OUTLET PORT, SAID PISTON VALVE MEMBER SELECTIVELY OPENING AND CLOSING THE INLET PORT, SAID SLEEVE VALVE MEMBER SELECTIVELY OPENING AND CLOSING THE EXHAUST PORT, SAID VALVE SPINDLE ASSEMBLY BEING MOVABLE TO AN EXHAUST POSITION, A POWER POSITION AND A HOLD MID-POSITION, SAID PUSHER PISTON ASSEMBLY INCLUDING MEANS FOR VENTING PRESSURE BUILD-UP WHEN THE VALVE SPINDLE ASSEMBLY IS MOVED TO A HOLD MID-POSITION THEREBY ENABLING ELIMINATION OF THE BUILT-UP PRESSURE WITHOUT DRIFT OF THE SPINDLE ASSEMBLY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |