US3296937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed change device for an hydraulic motor
Assignee: Poclain SA
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Filing: 1965-05-28
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Granted: 1967-01-10
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Expires: 1985-05-28
Abstract
No abstract record available.
Inventors
- 👤 Gabriel L Guinot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:46
CPC Classifications
F; F03; F03C; F03C1/00; F03C1/02; F03C1/04; F03C1/0447; F03C1/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A SPEED CHANGE DEVICE FOR AN HYDRAULIC MOTOR OF THE KIND COMPRISING A CYLINDER BLOCK, AT LEAST TWO GROUPS OF CYLINDERS IN SAID CYLINDER BLOCK, MEANS FOR SUPPLYING PRESSURE FLUID TO EACH OF SAID GROUPS OF CYLINDERS SEPARATELY, SAID MEANS INCLUDING A DISTRIBUTOR MOUNTED COAXIALLY WITHIN SAID CYLINDER BLOCK AND HAVING OPENINGS LEADING TO THE PERIPHERY OF SAID DISTRIBUTOR AND BEING GROUPED IN TRANSVERSE PLANES CORRESPONDING RESPECTIVELY TO PLANES OF THE FLUID SUPPLY CONDUITS OF THE CYLINDERS OF EACH GROUP, SAID DISTRIBUTOR COMPRISING A FIXED SLEEVE PROVIDED WITH RADIAL OPENINGS AND HAVING MOUNTED THEREIN AN AXIALLY MOVABLE SLIDE VALVE HAVING AN INLET CHAMBER AND AN OUTLET CHAMBER COMMUNICATING RESPECTIVELY WITH A PLURALITY OF RADIAL CONDUITS ARRANGED IN TRANSVERSE PLANES AND CAPABLE OF BEING BROUGHT OPPOSITE THE INNER ENDS OF THE RADIAL OPENINGS IN THE FIXED SLEEVE.
Claim 2
Dependent Claim
136 words
A SPEED CHANGE DEVICE FOR AN HYDRAULIC MOTOR OF THE KIND COMPRISING A CYLINDER BLOCK, AT LEAST TWO GROUPS OF CYLINDERS IN SAID CYLINDER BLOCK, MEANS FOR SUPPLYING PRESSURE FLUID TO EACH OF SAID GROUPS OF CYLINDERS SEPARATELY, SAID MEANS INCLUDING A DISTRIBUTOR MOUNTED COAXIALLY WITHIN SAID CYLINDER BLOCK AND HAVING OPENINGS LEADING TO THE PERIPHERY OF SAID DISTRIBUTOR AND BEING GROUPED IN TRANSVERSE PLANES CORRESPONDING RESPECTIVELY TO PLANES OF THE FLUID SUPPLY CONDUITS OF THE CYLINDERS OF EACH GROUP, SAID DISTRIBUTOR COMPRISING A FIXED SLEEVE PROVIDED WITH RADIAL OPENINGS AND HAVING MOUNTED THEREIN AN AXIALLY MOVABLE SLIDE VALVE HAVING AN INLET CHAMBER AND AN OUTLET CHAMBER COMMUNICATING RESPECTIVELY WITH A PLURALITY OF RADIAL CONDUITS ARRANGED IN TRANSVERSE PLANES AND CAPABLE OF BEING BROUGHT OPPOSITE THE INNER ENDS OF THE RADIAL OPENINGS IN THE FIXED SLEEVE.
References Cited (Backward Citations)
US2160612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |