US3123335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized piston valve
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
•
Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:35
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; F16K11/0708; Y; Y10; Y10T; Y10T137/00; Y10T137/0318
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN A SPOOL TYPE CONTROL VALVE, A FLOW CONTROL SPOOL HAVING TWO AXIALLY SPACED GENERALLY CYLINDRICAL LANDS CONNECTED BY AN INTEGRAL CONCENTRIC SHANK AND SEPARATED BY AN ANNULAR GROOVE THE BOTTOM OF WHICH IS DEFINED BY THE SHANK, THE ADJACENT ENDS OF THE RESPECTIVE LANDS CONSTITUTING FLOW CONTROL FACES WHICH LIE IN PLANES PARALLEL TO EACH OTHER AND PERPENDICULAR TO THE LONGITUDINAL AXIS OF THE SPOOL; AT LEAST TWO INTERNAL FLOW PASSAGES DEFINED WITHIN AT LEAST ONE OF SAID LANDS, EACH SAID FLOW PASSAGE COMPRISING A FIRST PORTION COMMUNICATING WITH SAID GROOVE AND EXTENDING AWAY FROM THE LAND CONTROL FACE ALONGSIDE AND PARALLEL TO THE SPOOL AXIS, AND A SECOND COMMUNICATING LINEAR PORTION EXTENDING FROM THE CYLINDRICAL SURFACE OF THE LAND INWARD TOWARD THE SPOOL AXIS AND AWAY FROM THE LAND CONTROL FACE AT AN ACUTE INCLUDED ANGLE WITH RESPECT THERETO.
Claim 2
Dependent Claim
141 words
IN A SPOOL TYPE CONTROL VALVE, A FLOW CONTROL SPOOL HAVING TWO AXIALLY SPACED GENERALLY CYLINDRICAL LANDS CONNECTED BY AN INTEGRAL CONCENTRIC SHANK AND SEPARATED BY AN ANNULAR GROOVE THE BOTTOM OF WHICH IS DEFINED BY THE SHANK, THE ADJACENT ENDS OF THE RESPECTIVE LANDS CONSTITUTING FLOW CONTROL FACES WHICH LIE IN PLANES PARALLEL TO EACH OTHER AND PERPENDICULAR TO THE LONGITUDINAL AXIS OF THE SPOOL; AT LEAST TWO INTERNAL FLOW PASSAGES DEFINED WITHIN AT LEAST ONE OF SAID LANDS, EACH SAID FLOW PASSAGE COMPRISING A FIRST PORTION COMMUNICATING WITH SAID GROOVE AND EXTENDING AWAY FROM THE LAND CONTROL FACE ALONGSIDE AND PARALLEL TO THE SPOOL AXIS, AND A SECOND COMMUNICATING LINEAR PORTION EXTENDING FROM THE CYLINDRICAL SURFACE OF THE LAND INWARD TOWARD THE SPOOL AXIS AND AWAY FROM THE LAND CONTROL FACE AT AN ACUTE INCLUDED ANGLE WITH RESPECT THERETO.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |