US3266424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid system including variable displacement pump
Assignee: Massey Ferguson Inc
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Filing: 1964-10-27
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Granted: 1966-08-16
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Expires: 1984-10-27
Abstract
No abstract record available.
Inventors
- 👤 Ernest V Bunting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:14
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; F04B1/00; F04B1/04; F04B1/053; F04B23/00; F04B23/04; F04B23/08; F04B23/10; F04B23/103; F04B49/007; F04B49/225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A SYSTEM FOR SUPPLYING VARIABLE VOLUMES OF FLUID IN ACCORDANCE WITH DEMAND COMPRISING A PLURALITY OF VARIABLE VOLUME PUMPING CHAMBERS EACH INCLUDING FIRST AND SECOND RELATIVELY MOVABLE PUMPING MEMBERS, DRIVE MEANS FOR MOVING SAID MEMBERS IN ONE DIRECTION RELATIVE TO EACH OTHER ON A PUMPING STROKE AND PERMITTING REALTIVE MOVEMENT THEREOF IN ANOTHER DIRECTION ON AN INTAKE STROKE, DISCHARGE MEANS FOR RECEIVING FLUID AT DISCHARGE PRESSURE FROM SAID PUMPING CHAMBERS ON PUMPING STROKES THEREOF, A SOURCE OF CHARGING FLUID UNDER A SUBSTANTIALLY CONSTANT CHARGING PRESSURE, AND MEANS INCLUDING PRESSURE RESPONSIVE METERING VALVE MEANS HAVING A PLURALITY OF INLET PORTS RESPECTIVELY COMMUNICATING SAID SOURCE WITH RESPECTIVE ONES OF SAID PUMPING CHAMBERS AND A METERING VALVE MEMBER VARIABLY MOVABLE BETWEEN FIRST AND SECOND POSITIONS RESPECTIVELY CLOSING AND OPENING SAID PORTS TO A SUBSTANTIALLY UNIFORM EXTENT TO METER EQUAL AMOUNTS OF CHARGING FLUID TO SAID RESPECTIVE PUMPING CHAMBERS ON INTAKE STROKES THEREOF, SAID VALVE MEMBER BEING VARIABLY MOVABLE BETWEEN SAID POSITIONS IN RESPONSE TO CHANGES IN SAID DISCHARGE PRESSURE.
Claim 2
Independent Claim
166 words
A SYSTEM FOR SUPPLYING VARIABLE VOLUMES OF FLUID IN ACCORDANCE WITH DEMAND COMPRISING A PLURALITY OF VARIABLE VOLUME PUMPING CHAMBERS EACH INCLUDING FIRST AND SECOND RELATIVELY MOVABLE PUMPING MEMBERS, DRIVE MEANS FOR MOVING SAID MEMBERS IN ONE DIRECTION RELATIVE TO EACH OTHER ON A PUMPING STROKE AND PERMITTING REALTIVE MOVEMENT THEREOF IN ANOTHER DIRECTION ON AN INTAKE STROKE, DISCHARGE MEANS FOR RECEIVING FLUID AT DISCHARGE PRESSURE FROM SAID PUMPING CHAMBERS ON PUMPING STROKES THEREOF, A SOURCE OF CHARGING FLUID UNDER A SUBSTANTIALLY CONSTANT CHARGING PRESSURE, AND MEANS INCLUDING PRESSURE RESPONSIVE METERING VALVE MEANS HAVING A PLURALITY OF INLET PORTS RESPECTIVELY COMMUNICATING SAID SOURCE WITH RESPECTIVE ONES OF SAID PUMPING CHAMBERS AND A METERING VALVE MEMBER VARIABLY MOVABLE BETWEEN FIRST AND SECOND POSITIONS RESPECTIVELY CLOSING AND OPENING SAID PORTS TO A SUBSTANTIALLY UNIFORM EXTENT TO METER EQUAL AMOUNTS OF CHARGING FLUID TO SAID RESPECTIVE PUMPING CHAMBERS ON INTAKE STROKES THEREOF, SAID VALVE MEMBER BEING VARIABLY MOVABLE BETWEEN SAID POSITIONS IN RESPONSE TO CHANGES IN SAID DISCHARGE PRESSURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |