US3323549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic valves
Assignee: Short Brothers PLC
•
Filing: 1964-05-14
•
Granted: 1967-06-06
•
Expires: 1984-05-14
Abstract
No abstract record available.
Inventors
- 👤 Carrington James Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:28
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
221 words
A THREE-WAY HYDRAULIC CONTROL VALVE INCLUDING A VALVE BODY AND A SPOOL LONGITUDINALLY SLIDABLE WITHIN A BORE IN THE VALVE BODY, SAID VALVE BODY HAVING AN ACTUATOR PORT, A FLUID OUTLET PORT AND A FLUID INLET PORT SPACED ALONG THE VALVE BODY WITH THE ACTUATOR PORT POSITIONED BETWEEN THE INLET AND OUTLET PORTS, SAID SPOOL HAVING A WAISTED PORTION WHICH INCREASES IN CROSS SECTION FROM THE REGION OF THE ACTUATOR PORT TO THE OUTLET PORT TO PARTIALLY COMPENSATE, COMPENSATE OR OVER COMPENSATE FOR THE FLOW REACTION FORCE RESULTING FROM THE FLOW OF FLUID FROM THE ACTUATOR PORT TO THE OUTLET PORT THROUGH SAID WAISTED PORTION IN A FIRST POSITION OF THE SPOOL, SAID FLUID SUPPLY INLET PORT BEING INCLINED TOWARD THE TRANSLATIONAL SPOOL AXIS IN THE DIRECTION OF THE ACTUATOR PORT, AND SAID SPOOL HAVING A FURTHER WAISTED PORTION SO DISPOSED THAT FLUID FROM THE FLUID INLET PORT IMPINGES ON A SHOULDER OF THE SPOOL FORMED BY THE TERMINATION OF SAID FURTHER WAISTED PORTION TO APPLY AN AXIAL IMPULSIVE FORCE ON SAID SPOOL IN THE DIRECTION OF THE ACTUATOR PORT TO PARTIALLY COMPENSATE, COMPENSATE OR OVER COMPENSATE FOR THE REACTION FORCE DEVELOPED AS A RESULT OF THE FLOW OF FLUID FROM THE SUPPLY INLET PORT TO THE ACTUATOR PORT TJROUGH SAID FURTHER WAISTED PORTION IN A SECOND POSITION OF THE SPOOL.
Claim 2
Dependent Claim
221 words
A THREE-WAY HYDRAULIC CONTROL VALVE INCLUDING A VALVE BODY AND A SPOOL LONGITUDINALLY SLIDABLE WITHIN A BORE IN THE VALVE BODY, SAID VALVE BODY HAVING AN ACTUATOR PORT, A FLUID OUTLET PORT AND A FLUID INLET PORT SPACED ALONG THE VALVE BODY WITH THE ACTUATOR PORT POSITIONED BETWEEN THE INLET AND OUTLET PORTS, SAID SPOOL HAVING A WAISTED PORTION WHICH INCREASES IN CROSS SECTION FROM THE REGION OF THE ACTUATOR PORT TO THE OUTLET PORT TO PARTIALLY COMPENSATE, COMPENSATE OR OVER COMPENSATE FOR THE FLOW REACTION FORCE RESULTING FROM THE FLOW OF FLUID FROM THE ACTUATOR PORT TO THE OUTLET PORT THROUGH SAID WAISTED PORTION IN A FIRST POSITION OF THE SPOOL, SAID FLUID SUPPLY INLET PORT BEING INCLINED TOWARD THE TRANSLATIONAL SPOOL AXIS IN THE DIRECTION OF THE ACTUATOR PORT, AND SAID SPOOL HAVING A FURTHER WAISTED PORTION SO DISPOSED THAT FLUID FROM THE FLUID INLET PORT IMPINGES ON A SHOULDER OF THE SPOOL FORMED BY THE TERMINATION OF SAID FURTHER WAISTED PORTION TO APPLY AN AXIAL IMPULSIVE FORCE ON SAID SPOOL IN THE DIRECTION OF THE ACTUATOR PORT TO PARTIALLY COMPENSATE, COMPENSATE OR OVER COMPENSATE FOR THE REACTION FORCE DEVELOPED AS A RESULT OF THE FLOW OF FLUID FROM THE SUPPLY INLET PORT TO THE ACTUATOR PORT TJROUGH SAID FURTHER WAISTED PORTION IN A SECOND POSITION OF THE SPOOL.
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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |