US3381624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fail-safe control for hydraulic cross-center pump
Assignee: PepsiAmericas Inc
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Filing: 1966-09-09
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Granted: 1968-05-07
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Expires: 1986-09-09
Abstract
No abstract record available.
Inventors
- 👤 Ellis H Born
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:33
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/42; F16H61/431; F04; F04B; F04B49/00; F04B49/002; F04B49/06; F16H61/4192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A SYSTEM FOR CHANGING THE DISPLACEMENT OF A CROSSCENTER HYDRAULIC PUMP OPERATED IN ASSOCIATION WITH ELECTRICAL CONTROL CIRCUITRY, SAID PUMP HAVING DISPLACEMENT CHANGING MEANS POSITIONED BY HYDRAULIC PISTON MEANS, SAID SYSTEM COMPRISING: AN ELECTRICALLY CONTROLLED SERVOVALVE AND A MANUALLY CONTROLLED SERVOVALVE EACH FOR REGULATING THE APPLICATION OF PRESSURE FLUID FROM A SOURCE TO SAID PISTON MEANS, A REVERSING VALVE CONTROLLED BY A SOLENOID, SAID REVERSING VALVE BEING CONNECTED THROUGH NO-RETURN VALVE MEANS ORIENTED TO DIRECT PRESSURE FLUID FROM SAID SOURCE TO SAID PISTON MEANS THROUGH SAID ELECTRICALLY CONTROLLED SERVOVALVE WHEN SAID SOLENOID IS ENERGIZED
Claim 2
Independent Claim
94 words
A SYSTEM FOR CHANGING THE DISPLACEMENT OF A CROSSCENTER HYDRAULIC PUMP OPERATED IN ASSOCIATION WITH ELECTRICAL CONTROL CIRCUITRY, SAID PUMP HAVING DISPLACEMENT CHANGING MEANS POSITIONED BY HYDRAULIC PISTON MEANS, SAID SYSTEM COMPRISING: AN ELECTRICALLY CONTROLLED SERVOVALVE AND A MANUALLY CONTROLLED SERVOVALVE EACH FOR REGULATING THE APPLICATION OF PRESSURE FLUID FROM A SOURCE TO SAID PISTON MEANS, A REVERSING VALVE CONTROLLED BY A SOLENOID, SAID REVERSING VALVE BEING CONNECTED THROUGH NO-RETURN VALVE MEANS ORIENTED TO DIRECT PRESSURE FLUID FROM SAID SOURCE TO SAID PISTON MEANS THROUGH SAID ELECTRICALLY CONTROLLED SERVOVALVE WHEN SAID SOLENOID IS ENERGIZED
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) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |