Patent US3253516A successfully refreshed from Google Patents.
US3253516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Ross Operating Valve Co
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Filing: 1963-09-12
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Granted: 1966-05-31
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Expires: 1983-09-12
Abstract
No abstract record available.
Inventors
- 👤 Andrew B Huntington
- 👤 Daniel B Abbott
- 👤 Edwin P Brinkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:06
CPC Classifications
F; F15; F15B; F15B20/00; F15B20/004; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614; Y10T137/86622; Y10T137/8663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
IN A SYSTEM FOR CONTROLLING THE FLOW OF FLUID TO A FLUID MOTOR, A FLUID SUPPLY PORT, A LOCKOUT VALVE HAVING AN INLET PORT CONNECTED TO SAID SUPPLY PORT, AN OUTLET PORT CONNECTED TO SAID FLUID MOTOR AND AN EXHAUST PORT, SAID LOCKOUT VALVE BEING MOVABLE BETWEEN AN OPEN POSITION IN WHICH SAID INLET AND OUTLET PORTS ARE CONNECTED AND A CLOSED POSITION IN WHICH SAID OUTLET AND EXHAUST PORTS ARE CONNECTED, A FIRST PRESSURE AREA ON SAID LOCKOUT VALVE CONNECTED TO SAID SUPPLY PORT AND EFFECTIVE WHEN THE LOCKOUT VALVE IS IN ITS CLOSED POSITION TO MAINTAIN THE LOCKOUT VALVE IN SAID CLOSED POSITION, SAID FIRST PRESSURE AREA BEING INEFFECTIVE WHEN THE LOCKOUT VALVE IS IN ITS OPEN POSITION; A SECOND PRESSURE AREA SMALLER THAN SAID FIRST PRESSURE AREA AND CONNECTED TO SAID SUPPLY PORT SO AS TO BE EFFECTIVE WHEN THE LOCKOUT VALVE IS IN ITS OPEN POSITION TO URGE THE LOCKOUT VALVE TO ITS CLOSED POSITION BUT INEFFECTIVE WHEN THE LOCKOUT VALVE IS IN ITS CLOSED POSITION, A SPRING URGING SAID LOCKOUT VALVE TO ITS CLOSED POSITION, A SIGNAL CHAMBER
Claim 2
Dependent Claim
183 words
IN A SYSTEM FOR CONTROLLING THE FLOW OF FLUID TO A FLUID MOTOR, A FLUID SUPPLY PORT, A LOCKOUT VALVE HAVING AN INLET PORT CONNECTED TO SAID SUPPLY PORT, AN OUTLET PORT CONNECTED TO SAID FLUID MOTOR AND AN EXHAUST PORT, SAID LOCKOUT VALVE BEING MOVABLE BETWEEN AN OPEN POSITION IN WHICH SAID INLET AND OUTLET PORTS ARE CONNECTED AND A CLOSED POSITION IN WHICH SAID OUTLET AND EXHAUST PORTS ARE CONNECTED, A FIRST PRESSURE AREA ON SAID LOCKOUT VALVE CONNECTED TO SAID SUPPLY PORT AND EFFECTIVE WHEN THE LOCKOUT VALVE IS IN ITS CLOSED POSITION TO MAINTAIN THE LOCKOUT VALVE IN SAID CLOSED POSITION, SAID FIRST PRESSURE AREA BEING INEFFECTIVE WHEN THE LOCKOUT VALVE IS IN ITS OPEN POSITION; A SECOND PRESSURE AREA SMALLER THAN SAID FIRST PRESSURE AREA AND CONNECTED TO SAID SUPPLY PORT SO AS TO BE EFFECTIVE WHEN THE LOCKOUT VALVE IS IN ITS OPEN POSITION TO URGE THE LOCKOUT VALVE TO ITS CLOSED POSITION BUT INEFFECTIVE WHEN THE LOCKOUT VALVE IS IN ITS CLOSED POSITION, A SPRING URGING SAID LOCKOUT VALVE TO ITS CLOSED POSITION, A SIGNAL CHAMBER
References Cited (Backward Citations)
US2900960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |