US3145661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump
Assignee: New York Air Brake LLC
•
Filing: 1962-12-19
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Granted: 1964-08-25
•
Expires: 1982-12-19
Abstract
No abstract record available.
Inventors
- 👤 Walter E Marietta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:10
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/082; F04C2/088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN A HYDRAULIC PUMP OF THE GEAR TYPE INCLUDING A HOUSING FORMED WITH INLET AND DISCHARGE PORTS AND WITH A WORKING CHAMBER CONTAINING A PAIR OF MESHING GEARS, THE MESHING TEETH OF THE TWO GEARS FORMING A CLOSED POCKET ALTERNATELY IN ONE GEAR AND THEN IN THE OTHER AS THE TWO GEARS ROTATE, SHAFTS FOR THE GEARS JOURNALLED IN BEARINGS SUPPORTED IN THE HOUSING, AND MEANS DEFINING A RESTRICTED BEARING FEED PASSAGE WHICH REGISTERS WITH SAID CLOSED POCKETS BUT OTHERWISE IS ISOLATED FROM FREE COMMUNICATION WITH THE INTERTOOTH SPACES OF THE GEARS FOR LEADING FLUID FROM THE CLOSED POCKETS TO AND THROUGH AT LEAST ONE OF THE BEARINGS, THE IMPROVEMENT WHICH COMPRISES MEANS DEFINING A NOISE REDUCTION CHAMBER THAT IS ISOLATED FROM FREE COMMUNICATION WITH THE INLET AND DISCHARGE PORTS AND COMMUNICATES WITH SAID CLOSED POCKETS AS THEY APPROACH, MOVE THROUGH, AND LEAVE THE FULL MESH POSITION OF THE GEARS.
Claim 2
Dependent Claim
150 words
IN A HYDRAULIC PUMP OF THE GEAR TYPE INCLUDING A HOUSING FORMED WITH INLET AND DISCHARGE PORTS AND WITH A WORKING CHAMBER CONTAINING A PAIR OF MESHING GEARS, THE MESHING TEETH OF THE TWO GEARS FORMING A CLOSED POCKET ALTERNATELY IN ONE GEAR AND THEN IN THE OTHER AS THE TWO GEARS ROTATE, SHAFTS FOR THE GEARS JOURNALLED IN BEARINGS SUPPORTED IN THE HOUSING, AND MEANS DEFINING A RESTRICTED BEARING FEED PASSAGE WHICH REGISTERS WITH SAID CLOSED POCKETS BUT OTHERWISE IS ISOLATED FROM FREE COMMUNICATION WITH THE INTERTOOTH SPACES OF THE GEARS FOR LEADING FLUID FROM THE CLOSED POCKETS TO AND THROUGH AT LEAST ONE OF THE BEARINGS, THE IMPROVEMENT WHICH COMPRISES MEANS DEFINING A NOISE REDUCTION CHAMBER THAT IS ISOLATED FROM FREE COMMUNICATION WITH THE INLET AND DISCHARGE PORTS AND COMMUNICATES WITH SAID CLOSED POCKETS AS THEY APPROACH, MOVE THROUGH, AND LEAVE THE FULL MESH POSITION OF THE GEARS.
References Cited (Backward Citations)
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Cited
US1644817A
Cited
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Cited
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Cited
FR977730A
Cited
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Cited
US2718758A
Cited
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Cited
US2885965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |