US3304953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid power system and valve mechanisms therefor
Assignee: Ohio Brass Co
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Filing: 1964-01-02
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Granted: 1967-02-21
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Expires: 1984-01-02
Abstract
No abstract record available.
Inventors
- 👤 William A Wickline
- 👤 Nevulis Anthony
- 👤 Evans John Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:49
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/0422; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/87169; Y10T137/87177
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A CONTROL VALVE FOR USE IN A PRESSURIZED FLUID POWER SYSTEM FOR CONTROLLING THE ACTUATION OF AN ASSOCIATED FLUID POWERED DOUBLE-ACTING MOTOR UNIT COMPRISING, A BODY, AN INLET PORT IN SAID BODY, SAID PORT BEING ADAPTED FOR ATTACHMENT TO A SOURCE OF PRESSURIZED FLUID, A PAIR OF DISTRIBUTING PORTS IN SAID BODY, EACH OF SAID DISTRIBUTING PORTS BEING ADAPTED FOR ATTACHMENT TO A RESPECTIVE END OF THE MOTOR UNIT, AN AXIALLY MOVABLE SPOOL FOR CONTROLLING THE APPLICATION OF PRESSURIZED FLUID FROM SAID INLET PORT TO A SELECTED ONE OF SAID DISTRIBUTING PORTS, AND THE RETURN OF PRESSURIZED FLUID FROM THE MOTOR UNIT THROUGH THE OTHER OF THE DISTRIBUTING PORTS, FLUID PRESSURE MEANS FOR APPLYING SAID PRESSURIZED FLUID AT A PREDETERMINED RELATIVELY LOW PRESSURE EQUALLY TO OPPOSITE ENDS OF SAID SPOOL FOR MAINTAINING SAID SPOOL IN NEUTRAL POSITION WHEREIN SAID DISTRIBUTING PORTS ARE CUT OFF FROM SAID INLET PORT, AND MEANS FOR SELECTIVELY CHANGING THE FLUID PRESSURE AT SAID
Claim 2
Dependent Claim
158 words
A CONTROL VALVE FOR USE IN A PRESSURIZED FLUID POWER SYSTEM FOR CONTROLLING THE ACTUATION OF AN ASSOCIATED FLUID POWERED DOUBLE-ACTING MOTOR UNIT COMPRISING, A BODY, AN INLET PORT IN SAID BODY, SAID PORT BEING ADAPTED FOR ATTACHMENT TO A SOURCE OF PRESSURIZED FLUID, A PAIR OF DISTRIBUTING PORTS IN SAID BODY, EACH OF SAID DISTRIBUTING PORTS BEING ADAPTED FOR ATTACHMENT TO A RESPECTIVE END OF THE MOTOR UNIT, AN AXIALLY MOVABLE SPOOL FOR CONTROLLING THE APPLICATION OF PRESSURIZED FLUID FROM SAID INLET PORT TO A SELECTED ONE OF SAID DISTRIBUTING PORTS, AND THE RETURN OF PRESSURIZED FLUID FROM THE MOTOR UNIT THROUGH THE OTHER OF THE DISTRIBUTING PORTS, FLUID PRESSURE MEANS FOR APPLYING SAID PRESSURIZED FLUID AT A PREDETERMINED RELATIVELY LOW PRESSURE EQUALLY TO OPPOSITE ENDS OF SAID SPOOL FOR MAINTAINING SAID SPOOL IN NEUTRAL POSITION WHEREIN SAID DISTRIBUTING PORTS ARE CUT OFF FROM SAID INLET PORT, AND MEANS FOR SELECTIVELY CHANGING THE FLUID PRESSURE AT SAID
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |