US3339573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control valve
Assignee: Weatherhead Co
•
Filing: 1965-03-15
•
Granted: 1967-09-05
•
Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Bahniuk Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:34
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0436; H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/14; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A FLUID-OPERATED FLOW CONTROL VALVE HAVING AN OUTPUT FLOW WHOSE DIRECTION AND MAGNITUDE ARE RESPONSIVE TO ONE OR MORE OF A PLURALITY OF INPUT SIGNALS, SAID VALVE COMPRISING A VALVE BODY HAVING AN INTERNAL BORE PROVIDED WITH AN INLET PORT ADAPTED TO RECEIVE A FLUID UNDER PRESSURE, A DRAIN PORT, AND A PAIR OF COOPERATING PORTS THROUGH EACH OF WHICH A FLUID MAY REVERSIBLY FLOW, A SPOOL MEMBER ADAPTED FOR REVERSIBLE AXIAL MOVEMENT IN THE CHAMBER, SAID SPOOL HAVING A PLURALITY OF AXIALLY SPACED ANNULAR LANDS AND GROOVES ADAPTED UPON AXIAL MOVEMENT OF THE SPOOL MEMBER TO SELECTIVELY CONNECT SAID INLET PORT TO ONE OF SAID COOPERATING PORTS AND THE OTHER OF SAID COOPERATING PORTS TO SAID DRAIN PORT, A PILOT VALVE SPOOL CARRIED BY THE VALVE BODY OPERABLE TO POSITION SAID SPOOL
Claim 2
Dependent Claim
133 words
A FLUID-OPERATED FLOW CONTROL VALVE HAVING AN OUTPUT FLOW WHOSE DIRECTION AND MAGNITUDE ARE RESPONSIVE TO ONE OR MORE OF A PLURALITY OF INPUT SIGNALS, SAID VALVE COMPRISING A VALVE BODY HAVING AN INTERNAL BORE PROVIDED WITH AN INLET PORT ADAPTED TO RECEIVE A FLUID UNDER PRESSURE, A DRAIN PORT, AND A PAIR OF COOPERATING PORTS THROUGH EACH OF WHICH A FLUID MAY REVERSIBLY FLOW, A SPOOL MEMBER ADAPTED FOR REVERSIBLE AXIAL MOVEMENT IN THE CHAMBER, SAID SPOOL HAVING A PLURALITY OF AXIALLY SPACED ANNULAR LANDS AND GROOVES ADAPTED UPON AXIAL MOVEMENT OF THE SPOOL MEMBER TO SELECTIVELY CONNECT SAID INLET PORT TO ONE OF SAID COOPERATING PORTS AND THE OTHER OF SAID COOPERATING PORTS TO SAID DRAIN PORT, A PILOT VALVE SPOOL CARRIED BY THE VALVE BODY OPERABLE TO POSITION SAID SPOOL
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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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |