Patent US3105790A successfully refreshed from Google Patents.
Patent US3145734A successfully refreshed from Google Patents.
US3145734A
Expired / Lapsed
US
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Pressure compensated flow control valve
Assignee: Borg Warner Corp
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Filing: 1961-10-06
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Granted: 1964-08-25
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Expires: 1981-10-06
Abstract
No abstract record available.
Inventors
- 👤 John C Lee
- 👤 Yuns E Moochhala
- 👤 Herbert N Underwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:45
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/05; F15B13/00; F15B13/01; F15B13/015; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/3051; F15B2211/30515; F15B2211/30525; F15B2211/3053; F15B2211/3055; F15B2211/30555; F15B2211/315; F15B2211/31523; F15B2211/31529; F15B2211/3157; F15B2211/31576; F15B2211/32; F15B2211/329; F15B2211/35; F15B2211/353; F15B2211/80; F15B2211/85; F15B2211/851; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/8593; Y10T137/87169; Y10T137/87177; Y10T137/87185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A FLOW CONTROL VALVE COMPRISING A BODY HAVING A SPOOL BORE FORMED THEREIN A FLUID INLET PASSAGE, A FLUID SUMP PASSAGE, A FIRST PORT BRANCH AND A SECOND PORT BRANCH IN COMMUNICATION WITH SAID SPOOL BORE; A VALVE SPOOL SLIDABLY POSITIONED WITHIN SAID SPOOL BORE; A BYPASS VALVE HAVING AN INLET CHAMBER IN COMMUNICATION WITH SAID FLUID INLET PASSAGE, A SUMP CHAMBER IN COMMUNICATION WITH SAID FLUID SUMP PASSAGE AND A CONTROL CHAMBER; AND AN EQUALIZING LINE ADAPTED TO COMMUNICATE FLUID FROM SAID FIRST PORT BRANCH AND FROM SAID SECOND PORT BRANCH TO SAID CONTROL CHAMBER; AND THROTTLING MEANS RESPONSIVE TO THE PRESSURE DIFFERENTIAL BETWEEN FLUID IN SAID FIRST PORT BRANCH AND FLUID IN SAID SECOND PORT BRANCH TO GOVERN THE FLOW OF FLUID THROUGH SAID FIRST PORT BRANCH AND THROUGH SAID SECOND PORT BRANCH.
Claim 2
Dependent Claim
135 words
A FLOW CONTROL VALVE COMPRISING A BODY HAVING A SPOOL BORE FORMED THEREIN A FLUID INLET PASSAGE, A FLUID SUMP PASSAGE, A FIRST PORT BRANCH AND A SECOND PORT BRANCH IN COMMUNICATION WITH SAID SPOOL BORE; A VALVE SPOOL SLIDABLY POSITIONED WITHIN SAID SPOOL BORE; A BYPASS VALVE HAVING AN INLET CHAMBER IN COMMUNICATION WITH SAID FLUID INLET PASSAGE, A SUMP CHAMBER IN COMMUNICATION WITH SAID FLUID SUMP PASSAGE AND A CONTROL CHAMBER; AND AN EQUALIZING LINE ADAPTED TO COMMUNICATE FLUID FROM SAID FIRST PORT BRANCH AND FROM SAID SECOND PORT BRANCH TO SAID CONTROL CHAMBER; AND THROTTLING MEANS RESPONSIVE TO THE PRESSURE DIFFERENTIAL BETWEEN FLUID IN SAID FIRST PORT BRANCH AND FLUID IN SAID SECOND PORT BRANCH TO GOVERN THE FLOW OF FLUID THROUGH SAID FIRST PORT BRANCH AND THROUGH SAID SECOND PORT BRANCH.
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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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |