US3205832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pump
Assignee: Individual
•
Filing: 1962-08-28
•
Granted: 1965-09-14
•
Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 Daub Rudolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:28
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/08; F04B1/00; F04B1/12; F04B1/14; F04B1/141; F04B1/143; F04B53/00; F04B53/16; F04B53/162; F04B53/164; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18336
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
AN AXIAL TYPE HYDRAULIC PUMP COMPRISING AN INTERMEDIATE PARTITION MEMBER EXTENDING NORMAL TO THE AXIS OF THE PUMP AND HAVING A CENTRAL AXIAL PROJECTION, A CYLINDER BLOCK SLIDEABLY SUPPORT BY SAID PROJECTION, A VALVE HOUSING MOUNTED ON SAID PARTITION MEMBER ON THE SAME SIDE AS SAID PROJECTION AND FORMING A FLUID SUPPLY COMPARTMENT CONTAINING SAID CYLINDER BLOCK, SAID CYLINDER BLOCK HAVING LONGITUDINALLY EXTENDING BORES WITH RECIPROCATING PUMP PISTONS AND VALVE PISTONS, SWIVEL JOINT MEANS ADJUSTABLY COUPLING SAID VALVE PISTONS AND SAID VALVE HOUSING FOR TRANSFERENCE OF FLUID FROM SAID BORES TO SAID VALVE HOUSINGS, SAID VALVE PISTONS AND SAID VALVE HOUSING HAVING SEATS FOR RECEIVING AXIAL FORCES AND SAID SWIVEL JOINT MEANS HAVING ROUNDED ENDS FITTING IN SAID SEATS TO SEAL THE TRANSFERRED FLUID BY AXIAL PRESSURES OF SAID VALVE PISTONS WITH MINIMAL SIDE LOADS ON SAID CYLINDER BLOCK, SAID CYLINDER BLOCK AND SAID PROJECTION FORMING A CHAMBER TO ADJUST THE POSITION OF SAID CYLINDER BLOCK UNDER HYDRAULIC PRESSURE SUPPLIED TO SAID CHAMBER, AND SAID PARTITION MEMBER HAVING PASSAGES FOR SUPPLYING FLUID TO SAID CHAMBER TO VARY THE POSITION OF SAID CYLINDER BLOCK WITH MINIMAL FRICTIONAL RESISTANCE WITH SAID VALVE PISTONS.
Claim 2
Dependent Claim
191 words
AN AXIAL TYPE HYDRAULIC PUMP COMPRISING AN INTERMEDIATE PARTITION MEMBER EXTENDING NORMAL TO THE AXIS OF THE PUMP AND HAVING A CENTRAL AXIAL PROJECTION, A CYLINDER BLOCK SLIDEABLY SUPPORT BY SAID PROJECTION, A VALVE HOUSING MOUNTED ON SAID PARTITION MEMBER ON THE SAME SIDE AS SAID PROJECTION AND FORMING A FLUID SUPPLY COMPARTMENT CONTAINING SAID CYLINDER BLOCK, SAID CYLINDER BLOCK HAVING LONGITUDINALLY EXTENDING BORES WITH RECIPROCATING PUMP PISTONS AND VALVE PISTONS, SWIVEL JOINT MEANS ADJUSTABLY COUPLING SAID VALVE PISTONS AND SAID VALVE HOUSING FOR TRANSFERENCE OF FLUID FROM SAID BORES TO SAID VALVE HOUSINGS, SAID VALVE PISTONS AND SAID VALVE HOUSING HAVING SEATS FOR RECEIVING AXIAL FORCES AND SAID SWIVEL JOINT MEANS HAVING ROUNDED ENDS FITTING IN SAID SEATS TO SEAL THE TRANSFERRED FLUID BY AXIAL PRESSURES OF SAID VALVE PISTONS WITH MINIMAL SIDE LOADS ON SAID CYLINDER BLOCK, SAID CYLINDER BLOCK AND SAID PROJECTION FORMING A CHAMBER TO ADJUST THE POSITION OF SAID CYLINDER BLOCK UNDER HYDRAULIC PRESSURE SUPPLIED TO SAID CHAMBER, AND SAID PARTITION MEMBER HAVING PASSAGES FOR SUPPLYING FLUID TO SAID CHAMBER TO VARY THE POSITION OF SAID CYLINDER BLOCK WITH MINIMAL FRICTIONAL RESISTANCE WITH SAID VALVE PISTONS.
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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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |