US3137238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump or motor
Assignee: Doosan Bobcat North America Inc
•
Filing: 1961-12-11
•
Granted: 1964-06-16
•
Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Richard O Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:15
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0023; F04C15/0026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN A PRESSURE GENERATING PUMP OF THE TYPE INCLUDING A HOUSING CONTAINING INTERMESHING GEARS AND HAVING AN INLET LEADING TO AND AN OUTLET LEADING FROM SAID HOUSING, AN AXIALLY MOVABLE THRUST PLATE HAVING A SEALING SURFACE FOR SEALING THE SIDE FACE OF ONE OF ASID GEARS, THE SIDE OF SAID THRUST PLATE REMOTE FROM SAID SEALING SURFACE FORMING A PORTION OF A MOTIVE PRESSURE CHAMBER, PASSAGE MEANS CONDUCTING PUMP GENERATED PRESSURE FLUID TO SAID PRESSURE CHAMBER FOR MOVING SAID THRUST PLATE AXIALLY INTO SEALING ENGAGEMENT WITH SAID ONE GEAR, AND AT LEAST ONE OPENING IN SAID THRUST PLATE HAVING A SMALLER FLOW AREA THAN SAID PASSAGE MEANS SPACED FROM SAID PASSAGE MEANS AND COMMUNICATING SAID PASSAGE MEANS AND PRESSURE CHAMBER WITH GEAR POCKETS ON THE SEALING SIDE OF SAID THRUST PLATE NORMALLY CONTAINING A PUMP GENERATED PRESSURE FLUID.
Claim 2
Dependent Claim
138 words
IN A PRESSURE GENERATING PUMP OF THE TYPE INCLUDING A HOUSING CONTAINING INTERMESHING GEARS AND HAVING AN INLET LEADING TO AND AN OUTLET LEADING FROM SAID HOUSING, AN AXIALLY MOVABLE THRUST PLATE HAVING A SEALING SURFACE FOR SEALING THE SIDE FACE OF ONE OF ASID GEARS, THE SIDE OF SAID THRUST PLATE REMOTE FROM SAID SEALING SURFACE FORMING A PORTION OF A MOTIVE PRESSURE CHAMBER, PASSAGE MEANS CONDUCTING PUMP GENERATED PRESSURE FLUID TO SAID PRESSURE CHAMBER FOR MOVING SAID THRUST PLATE AXIALLY INTO SEALING ENGAGEMENT WITH SAID ONE GEAR, AND AT LEAST ONE OPENING IN SAID THRUST PLATE HAVING A SMALLER FLOW AREA THAN SAID PASSAGE MEANS SPACED FROM SAID PASSAGE MEANS AND COMMUNICATING SAID PASSAGE MEANS AND PRESSURE CHAMBER WITH GEAR POCKETS ON THE SEALING SIDE OF SAID THRUST PLATE NORMALLY CONTAINING A PUMP GENERATED PRESSURE FLUID.
References Cited (Backward Citations)
US2513984A
Cited
US2714856A
Cited
US2816512A
Cited
US2876705A
Cited
US2809592A
Cited
GB769763A
Cited
FR1121180A
Cited
US2870719A
Cited
US2853952A
Cited
US2870720A
Cited
US3011448A
Cited
US3076414A
Cited
US3012511A
Cited
US3046902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |