Patent US3263906A successfully refreshed from Google Patents.
US3263906A
Expired / Lapsed
US
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Stator vane check valve
Assignee: Task Corp
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Filing: 1963-07-22
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Granted: 1966-08-02
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Expires: 1983-07-22
Abstract
No abstract record available.
Inventors
- 👤 Elmer F Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:43
CPC Classifications
F; F04; F04D; F04D19/00; F04D19/002; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/56; F04D29/563; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A CHECK VALVE, A FLOW CONDUIT HAVING AN AXIS, A SERIES OF FLOW CONTROL VANES ARRANGED WITHIN AN ANNULAR ZONE IN THE CONDUIT, THE VANES HAVING (A) FORWARD FLOW CONTROLLING OPEN POSITIONS IN WHICH THE VANES ARE DISPOSED IN GENERALLY FORWARDLY AND AXIALLY EXTENDING PLANES SPACED ABOUT SAID AXIS. (B) REVERSE FLOW BLOCKING CLOSED POSITIONS IN WHICH THE VANES ARE DISPOSED IN A TRANSVERSE PLANE EXTENDING GENERALLY NORMAL TO SAID AXIS, AND (C) INTERMEDIATE POSITIONS BETWEEN SAID OPEN AND CLOSED POSITIONS, THE VANES BEING SIMULTANEOUSLY ROTATABLE BETWEEN SAID POSITIONS, AND MEANS FOR CONTROLLING SAID VANE ROTATION SO THAT THE VANES MUST ROTATE AS A GROUP BETWEEN SAID POSITIONS IN RESPONSE TO CHANGE IN SAID FLOW AND SO THAT THE VANES SEEK SAID INTERMEDIATE POSITIONS UNDER NO-FLOW CONDITIONS.
Claim 2
Dependent Claim
128 words
IN A CHECK VALVE, A FLOW CONDUIT HAVING AN AXIS, A SERIES OF FLOW CONTROL VANES ARRANGED WITHIN AN ANNULAR ZONE IN THE CONDUIT, THE VANES HAVING (A) FORWARD FLOW CONTROLLING OPEN POSITIONS IN WHICH THE VANES ARE DISPOSED IN GENERALLY FORWARDLY AND AXIALLY EXTENDING PLANES SPACED ABOUT SAID AXIS. (B) REVERSE FLOW BLOCKING CLOSED POSITIONS IN WHICH THE VANES ARE DISPOSED IN A TRANSVERSE PLANE EXTENDING GENERALLY NORMAL TO SAID AXIS, AND (C) INTERMEDIATE POSITIONS BETWEEN SAID OPEN AND CLOSED POSITIONS, THE VANES BEING SIMULTANEOUSLY ROTATABLE BETWEEN SAID POSITIONS, AND MEANS FOR CONTROLLING SAID VANE ROTATION SO THAT THE VANES MUST ROTATE AS A GROUP BETWEEN SAID POSITIONS IN RESPONSE TO CHANGE IN SAID FLOW AND SO THAT THE VANES SEEK SAID INTERMEDIATE POSITIONS UNDER NO-FLOW CONDITIONS.
References Cited (Backward Citations)
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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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |