Patent US3266426A successfully refreshed from Google Patents.
US3266426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump control
Assignee: Dover Corp
•
Filing: 1964-02-20
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Granted: 1966-08-16
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Expires: 1984-02-20
Abstract
No abstract record available.
Inventors
- 👤 Virgil A Brunson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:50
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2622; Y10T137/2625; Y10T137/7722; Y10T137/7837; Y10T137/7876
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
A SYSTEM FOR SUPPLYING LIQUID SELECTIVELY AT EITHER OF TWO CONTROLLED PRESSURE COMPRISING IN COMBINATION, A POSITIVE DISPLACEMENT PUMP, A RELIEF VALVE WHICH IS BIASED TOWARD CLOSED POSITION AND IS CONNECTED BETWEEN THE OUTLET AND INLET SIDE OF THE PUMP TO DIVERT LIQUID FROM THE THROUGH FLOW PRODUCED BY THE PUMP UPON ATTAINMENT OF A PRESSURE ON THE OUTLET SIDE THAT IS SUFFICIENT TO OPEN THE VALVE, A CHAMBER HAVING AN EXPANSIBLE WALL THAT IS OPERATIVELY CONNECTED TO THE RELIEF VALVE TO CONTROL THE CLOSING BIAS OF THE VALVE, A BLEED CONNECTED FOR SUPPLYING TO THE CHAMBER LIQUID DISCHARGED FROM THE PUMP, TO ESTABLISH AN ELEVATED PRESSURE IN THE CHAMBER AND THEREBY ESTABLISH AN INCREASED VALVE-CLOSING BIAS, A DISCHARGE VALVE WHICH IS CONNECTED TO THE CHAMBER AND WHICH HAS A CAPACITY FOR DISCHARGE LIQUID FROM THE CHAMBER THAT IS SUBSTANTIALLY GREATER THAN THE CAPACITY OF THE BLEED CONNECTION, AND FLOW-SENSING MEMBER LOCATED IN THE PATH OF THE THROUGH FLOW OF LIQUID PRODUCED BY THE PUMP, WHICH IS OPERATIVELY CONNECTED TO THE DISCHARGE VALVE AND IS MOVABLE BETWEEN A NORMAL FLOW-SENSING POSITION IN WHICH IT HOLDS THE DISCHARGE VALVE CLOSED AND A NON-FLOW-SENSING POSITION IN WHICH IT HOLDS THE DISCHARGE VALVE OPEN.
Claim 2
Independent Claim
201 words
A SYSTEM FOR SUPPLYING LIQUID SELECTIVELY AT EITHER OF TWO CONTROLLED PRESSURE COMPRISING IN COMBINATION, A POSITIVE DISPLACEMENT PUMP, A RELIEF VALVE WHICH IS BIASED TOWARD CLOSED POSITION AND IS CONNECTED BETWEEN THE OUTLET AND INLET SIDE OF THE PUMP TO DIVERT LIQUID FROM THE THROUGH FLOW PRODUCED BY THE PUMP UPON ATTAINMENT OF A PRESSURE ON THE OUTLET SIDE THAT IS SUFFICIENT TO OPEN THE VALVE, A CHAMBER HAVING AN EXPANSIBLE WALL THAT IS OPERATIVELY CONNECTED TO THE RELIEF VALVE TO CONTROL THE CLOSING BIAS OF THE VALVE, A BLEED CONNECTED FOR SUPPLYING TO THE CHAMBER LIQUID DISCHARGED FROM THE PUMP, TO ESTABLISH AN ELEVATED PRESSURE IN THE CHAMBER AND THEREBY ESTABLISH AN INCREASED VALVE-CLOSING BIAS, A DISCHARGE VALVE WHICH IS CONNECTED TO THE CHAMBER AND WHICH HAS A CAPACITY FOR DISCHARGE LIQUID FROM THE CHAMBER THAT IS SUBSTANTIALLY GREATER THAN THE CAPACITY OF THE BLEED CONNECTION, AND FLOW-SENSING MEMBER LOCATED IN THE PATH OF THE THROUGH FLOW OF LIQUID PRODUCED BY THE PUMP, WHICH IS OPERATIVELY CONNECTED TO THE DISCHARGE VALVE AND IS MOVABLE BETWEEN A NORMAL FLOW-SENSING POSITION IN WHICH IT HOLDS THE DISCHARGE VALVE CLOSED AND A NON-FLOW-SENSING POSITION IN WHICH IT HOLDS THE DISCHARGE VALVE OPEN.
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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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |