US3160102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable volume pump
Assignee: Weatherhead Co
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Filing: 1962-09-28
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Granted: 1964-12-08
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Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
- 👤 Budzich Tadeusz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:20
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/14; F04B1/141; F04B1/143; F04B49/00; F04B49/08; F04B49/10; F04B49/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN A VARIABLE DISPLACEMENT PUMP HAVING AN INLET CONNECTED TO A RESERVOIR, AN OUTLET AND DISPLACEMENT CONTROL MEANS OPERABLE BY A FLUID MOTOR TO VARY THE EFFECTIVE OUTPUT DISPLACEMENT OF THE PUMP, A FLOW RESPONSIVE CONTROL COMPRISING AN ORIFICE CONNECTED TO SAID OUTLET, AN UPSTREAM LINE CONNECTED TO SAID OUTLET AT THE UPSTREAM SIDE OF SAID ORIFICE, A DOWNSTREAM LINE CONNECTED TO SAID OUTLET AT THE DOWNSTREAM SIDE OF SAID ORIFICE, AND A CONTROL VALVE CONNECTED TO SAID UPSTREAM AND SAID DOWNSTREAM LINES, TO SAID RESERVOIR AND TO SAID FLUID MOTOR, SAID CONTROL VALVE INCLUDING A MOVABLE VALVE MEMBER ADAPTED TO SELECTIVELY CONNECT SAID FLUID MOTOR TO SAID PUMP OUTLET AND TO SAID RESERVOIR, FIRST PISTON MEANS BIASING SAID VALVE MEMBER IN ONE DIRECTION RESPONSIVE TO THE PRESSURE DIFFERENTIAL ACROSS SAID ORIFICE, AND SECOND PISTON MEANS BIASING SAID VALVE MEMBER IN OPPOSITION TO SAID FIRST PISTON MEANS RESPON-
Claim 2
Dependent Claim
148 words
IN A VARIABLE DISPLACEMENT PUMP HAVING AN INLET CONNECTED TO A RESERVOIR, AN OUTLET AND DISPLACEMENT CONTROL MEANS OPERABLE BY A FLUID MOTOR TO VARY THE EFFECTIVE OUTPUT DISPLACEMENT OF THE PUMP, A FLOW RESPONSIVE CONTROL COMPRISING AN ORIFICE CONNECTED TO SAID OUTLET, AN UPSTREAM LINE CONNECTED TO SAID OUTLET AT THE UPSTREAM SIDE OF SAID ORIFICE, A DOWNSTREAM LINE CONNECTED TO SAID OUTLET AT THE DOWNSTREAM SIDE OF SAID ORIFICE, AND A CONTROL VALVE CONNECTED TO SAID UPSTREAM AND SAID DOWNSTREAM LINES, TO SAID RESERVOIR AND TO SAID FLUID MOTOR, SAID CONTROL VALVE INCLUDING A MOVABLE VALVE MEMBER ADAPTED TO SELECTIVELY CONNECT SAID FLUID MOTOR TO SAID PUMP OUTLET AND TO SAID RESERVOIR, FIRST PISTON MEANS BIASING SAID VALVE MEMBER IN ONE DIRECTION RESPONSIVE TO THE PRESSURE DIFFERENTIAL ACROSS SAID ORIFICE, AND SECOND PISTON MEANS BIASING SAID VALVE MEMBER IN OPPOSITION TO SAID FIRST PISTON MEANS RESPON-
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) | 1967-12-08 | 1968-06-08 | 1968-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-08 | 1972-06-08 | 1972-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-08 | 1976-06-08 | 1976-12-08 | $7700.00 | Window Closed / Lapsed |