Patent JPS5848302A successfully refreshed from Google Patents.
US3203185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic transmission
Assignee: New York Air Brake LLC
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Filing: 1963-10-24
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Granted: 1965-08-31
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Expires: 1983-10-24
Abstract
No abstract record available.
Inventors
- 👤 Samuel G Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:12
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/4008; F16H61/4017; F16H61/46; F16H61/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A HYDROSTATIC TRANSMISSION COMPRISING (A) A REVERSIBLE PUMP HAVING INLET AND DISCHARGE PORTS; (B) A REVERSIBLE MOTOR HAVING INLET AND DISCHARGE PORTS; (C) A FIRST CONDUIT CONNECTING THE INLET PORT OF THE PUMP WITH THE DISCHARGE PORT OF THE MOTOR; (D) A SECOND CONDUIT CONNECTING THE DISCHARGE PORT OF THE PUMP WITH THE INLET PORT OF THE MOTOR; (E) A RELIEF VALVE LOCATED IN THE FIRST CONDUIT AND ARRANGED TO PERMIT FLOW FROM THE MOTOR TO THE PUMP UPON THE OCCURANCE OF A PREDETERMINED PRESSURE DIFFERENTIAL ACROSS THE RELIEF VALVE; (F) A SECOND RELIEF VALVE LOCATED IN THE SECOND CONDUIT AND ARRANGED TO PERMIT FLOW FROM THE MOTOR TO THE PUMP UPON THE OCCURANCE OF A PREDETERMINED PRESSURE DIFFERENTIAL ACROSS THE RELIEF VALVE; (G) A FIRST ONE-WAY FLOW MEANS FOR PERMITTING FLOW FROM ONE PORT OF THE PUMP TO ONE PORT OF THE MOTOR BUT BLOCKING FLOW IN THE REVERSE DIRECTION; AND (H) SECOND ONE-WAY FLOW MEANS FOR PERMITTING FLOW FROM THE OTHER PORT OF THER PUMP TO THE OTHER PORT OF THE MOTOR BUT BLOCKING FLOW IN THE REVERSE DIRECTION.
Claim 2
Dependent Claim
181 words
A HYDROSTATIC TRANSMISSION COMPRISING (A) A REVERSIBLE PUMP HAVING INLET AND DISCHARGE PORTS; (B) A REVERSIBLE MOTOR HAVING INLET AND DISCHARGE PORTS; (C) A FIRST CONDUIT CONNECTING THE INLET PORT OF THE PUMP WITH THE DISCHARGE PORT OF THE MOTOR; (D) A SECOND CONDUIT CONNECTING THE DISCHARGE PORT OF THE PUMP WITH THE INLET PORT OF THE MOTOR; (E) A RELIEF VALVE LOCATED IN THE FIRST CONDUIT AND ARRANGED TO PERMIT FLOW FROM THE MOTOR TO THE PUMP UPON THE OCCURANCE OF A PREDETERMINED PRESSURE DIFFERENTIAL ACROSS THE RELIEF VALVE; (F) A SECOND RELIEF VALVE LOCATED IN THE SECOND CONDUIT AND ARRANGED TO PERMIT FLOW FROM THE MOTOR TO THE PUMP UPON THE OCCURANCE OF A PREDETERMINED PRESSURE DIFFERENTIAL ACROSS THE RELIEF VALVE; (G) A FIRST ONE-WAY FLOW MEANS FOR PERMITTING FLOW FROM ONE PORT OF THE PUMP TO ONE PORT OF THE MOTOR BUT BLOCKING FLOW IN THE REVERSE DIRECTION; AND (H) SECOND ONE-WAY FLOW MEANS FOR PERMITTING FLOW FROM THE OTHER PORT OF THER PUMP TO THE OTHER PORT OF THE MOTOR BUT BLOCKING FLOW IN THE REVERSE DIRECTION.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |