US3370423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable flow hydraulic system with reserve fluid eductor
Assignee: Woodland Manufacturing Co
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Filing: 1966-05-27
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Granted: 1968-02-27
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Expires: 1986-05-27
Abstract
No abstract record available.
Inventors
- 👤 Donald R Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:03
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/04; F15B7/00; F15B7/06; F15B7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN A HYDRAULIC FLUID FLOW SYSTEM: A HYDRAULIC PUMP HAVING A FLUID INLET; A FIRST CONDUIT COUPLED TO SAID INLET AND EXTENDING OUTWARDLY FROM SAID PUMP FOR DIRECTING A RETURN FLOW OF HYDRAULIC FLUID THERETO; A TANK ADAPTED TO CONTAIN A SUPPLY OF SAID FLUID; A SECOND CONDUIT PLACING SAID TANK IN FLUID COMMUNICATION WITH SAID FIRST CONDUIT AT A LOCAION THEREON SPACED FROM SAID INLET, WHEREBY A PORTION OF SAID RETURN FLOW WILL BE DIRECTED INTO AND RETAINED WITHIN SAID TANK; AND FLUID PASSAGE MEANS INTERCONNECTING SAID TANK AND SAID FIRST CONDUIT AT A SECOND LOCATION ON THE LATER BETWEEN THE PUMP AND SAID FIRST LOCATION AND BEING DISPOSED FOR DRAWING SAID FLUID INTO SAID FIRST CONDUIT FROM SAID TANK IN RESPONSE TO THE FLUID PRESSURE AT SAID INLET, WHEREBY VARIATIONS IN THE VOLUME RATE OF FLOW OF SAID FLUID TO SAID INLET CAN BE EFFECTED TO PERMIT SAID PUMP TO SATISFY CHANGING LOAD CONDITIONS TO SAID SYSTEM.
Claim 2
Dependent Claim
159 words
IN A HYDRAULIC FLUID FLOW SYSTEM: A HYDRAULIC PUMP HAVING A FLUID INLET; A FIRST CONDUIT COUPLED TO SAID INLET AND EXTENDING OUTWARDLY FROM SAID PUMP FOR DIRECTING A RETURN FLOW OF HYDRAULIC FLUID THERETO; A TANK ADAPTED TO CONTAIN A SUPPLY OF SAID FLUID; A SECOND CONDUIT PLACING SAID TANK IN FLUID COMMUNICATION WITH SAID FIRST CONDUIT AT A LOCAION THEREON SPACED FROM SAID INLET, WHEREBY A PORTION OF SAID RETURN FLOW WILL BE DIRECTED INTO AND RETAINED WITHIN SAID TANK; AND FLUID PASSAGE MEANS INTERCONNECTING SAID TANK AND SAID FIRST CONDUIT AT A SECOND LOCATION ON THE LATER BETWEEN THE PUMP AND SAID FIRST LOCATION AND BEING DISPOSED FOR DRAWING SAID FLUID INTO SAID FIRST CONDUIT FROM SAID TANK IN RESPONSE TO THE FLUID PRESSURE AT SAID INLET, WHEREBY VARIATIONS IN THE VOLUME RATE OF FLOW OF SAID FLUID TO SAID INLET CAN BE EFFECTED TO PERMIT SAID PUMP TO SATISFY CHANGING LOAD CONDITIONS TO SAID SYSTEM.
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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |