US3191382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic system
Assignee: New York Air Brake LLC
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Filing: 1964-06-29
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Granted: 1965-06-29
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Expires: 1984-06-29
Abstract
No abstract record available.
Inventors
- 👤 Charles O Weisenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:21
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/16; B60T13/18; E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; E02F9/2221; F; F04; F04B; F04B49/00; F04B49/002; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/05; F15B11/055; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/2053; F15B2211/20546; F15B2211/20553; F15B2211/25; F15B2211/253; F15B2211/30; F15B2211/31; F15B2211/3105; F15B2211/3111; F15B2211/60; F15B2211/635; F15B2211/80; F15B2211/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN COMBINATION (A) A VARIABLE DELIVERY HYDRAULIC PUMP; (B) A DISCHARGE PRESSURE COMPENSATOR FOR VARYING PUMP DELIVERY RATE IN INVERSE RELATION TO DISCHARGE PRESSURE TO THEREBY LIMIT THAT PRESSURE TO A PREDETERMINED VALUE; (C) A FLUID PRESSURE MOTOR; (D) DISTRIBUTING MEANS, INCLUDING A CLOSED CENTER DISTRIBUTING VALVE CAPABLE OF THROTTLING FLOW, FOR SELECTIVELY DELIVERING FLUID DISCHARGED BY THE PUMP TO THE MOTOR; (E) MEANS EFFECTIVE WHEN THE DISTRIBUTING VALVE IS THROTTLING FLOW TO THE MOTOR AND DISCHARGE PRESSURE IS BELOW SAID PREDETERMINED VALUE TO VARY PUMP DELIVERY RATE IN INVERSE RELATION TO THE PRESSURE DIFFERENTIAL ACROSS THE DISTRIBUTING VALVE TO THEREBY MAINTAIN SAID DIFFERENTIAL CONSTANT AT A PRESELECTED VALUE; AND (F) MEANS EFFECTIVE WHEN THE DISTRIBUTING VALVE IS CLOSED FOR VARYING PUMP DELIVERY RATE IN INVERSE RELATION TO DISCHARGE PRESSURE TO THEREBY MAINTAIN SAID PRESSURE CONSTANT AT A VALUE MATERIALLY LOWER THAN SAID PREDETERMINED VALUE.
Claim 2
Dependent Claim
145 words
IN COMBINATION (A) A VARIABLE DELIVERY HYDRAULIC PUMP; (B) A DISCHARGE PRESSURE COMPENSATOR FOR VARYING PUMP DELIVERY RATE IN INVERSE RELATION TO DISCHARGE PRESSURE TO THEREBY LIMIT THAT PRESSURE TO A PREDETERMINED VALUE; (C) A FLUID PRESSURE MOTOR; (D) DISTRIBUTING MEANS, INCLUDING A CLOSED CENTER DISTRIBUTING VALVE CAPABLE OF THROTTLING FLOW, FOR SELECTIVELY DELIVERING FLUID DISCHARGED BY THE PUMP TO THE MOTOR; (E) MEANS EFFECTIVE WHEN THE DISTRIBUTING VALVE IS THROTTLING FLOW TO THE MOTOR AND DISCHARGE PRESSURE IS BELOW SAID PREDETERMINED VALUE TO VARY PUMP DELIVERY RATE IN INVERSE RELATION TO THE PRESSURE DIFFERENTIAL ACROSS THE DISTRIBUTING VALVE TO THEREBY MAINTAIN SAID DIFFERENTIAL CONSTANT AT A PRESELECTED VALUE; AND (F) MEANS EFFECTIVE WHEN THE DISTRIBUTING VALVE IS CLOSED FOR VARYING PUMP DELIVERY RATE IN INVERSE RELATION TO DISCHARGE PRESSURE TO THEREBY MAINTAIN SAID PRESSURE CONSTANT AT A VALUE MATERIALLY LOWER THAN SAID PREDETERMINED VALUE.
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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |