US3606487A
Expired / Lapsed
US
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Control valve
Assignee: Wagner Electric Corp
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Filing: 1969-11-04
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Granted: 1971-09-20
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Expires: 1989-11-04
Abstract
Abstract A CONTROL VALVE FOR USE IN A DUAL OR SPLIT BRAKE SYSTEM HAVING A SWITCH OPERATING PISTON MOVABLE FROM A CENTERED POSITION TOWARD OPPOSED TRANSLATED POSITIONS IN RESPONSE TO A PREDETERMINED DIFFERENTIAL BETWEEN SEPARATELY SUPPLIED FLUID PRESSURES ACTING THEREON. THE SWITCH OPERATING PISTON ALSO INCLUDES DRIVING MEANS SUBJECTED TO THE SEPARATELY SUPPLIED FLUID PRESSURES AND DRIVINGLY ENGAGED WITH A METERING PISTON, SAID DRIVING MEANS BEING RESPONSIVE TO THE SUPPLIED FLUID PRESSURES IN EXCESS OF A PREDETERMINED VALUE TO DRIVE SAID METERING PISTON TOWARD A POSITION EFFECTING A METERED APPLICATION THROUGH SAID CONTROL VALVE OF ONE OF THE SUPPLIED FLUID PRESSURES.
Inventors
- 👤 Raymond J Kersting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:11
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/26; B60T17/00; B60T17/18; B60T17/22; B60T17/226; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2703; Y10T137/2705
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |