US3182912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic transmission control system
Assignee: New York Air Brake LLC
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Filing: 1963-05-02
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Granted: 1965-05-11
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Expires: 1983-05-02
Abstract
No abstract record available.
Inventors
- 👤 Charles O Weisenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:36
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/465; F02; F02D; F02D29/00; F02D2700/00; F02D2700/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN COMBINATION (A) A HYDROSTATIC TRANSMISSION INCLUDING A MOTOR AND A VARIABLE DISPLACEMENT PUMP, CONNECTED IN A CLOSED CIRCUIT, BOTH THE PUMP AND THE MOTOR BEING OF THE ROTARY CYLINDER BARREL, LONGITUDINALLY RECIPROCATING PISTON TYPE; (B) A FAN CONNECTED WITH THE MOTOR; (C) A VARIABLE SPEED PRIME MOVER CONNECTED WITH THE PUMP; (D) FIRST MEANS RESPONSIVE TO CHANGES IN A CONDITION FOR VARYING THE DISPLACEMENT OF THE PUMP TO THEREBY INCREASE AND DECREASE FAN SPEED; AND (E) OVERRIDE MEANS RESPONSIVE TO FAN SPEED FOR OVERRIDING THE FIRST MEANS AND LIMITING THE DISPLACEMENT OF THE PUMP TO A PREDETERMINED MAXIMUM VALUE.
Claim 2
Dependent Claim
100 words
IN COMBINATION (A) A HYDROSTATIC TRANSMISSION INCLUDING A MOTOR AND A VARIABLE DISPLACEMENT PUMP, CONNECTED IN A CLOSED CIRCUIT, BOTH THE PUMP AND THE MOTOR BEING OF THE ROTARY CYLINDER BARREL, LONGITUDINALLY RECIPROCATING PISTON TYPE; (B) A FAN CONNECTED WITH THE MOTOR; (C) A VARIABLE SPEED PRIME MOVER CONNECTED WITH THE PUMP; (D) FIRST MEANS RESPONSIVE TO CHANGES IN A CONDITION FOR VARYING THE DISPLACEMENT OF THE PUMP TO THEREBY INCREASE AND DECREASE FAN SPEED; AND (E) OVERRIDE MEANS RESPONSIVE TO FAN SPEED FOR OVERRIDING THE FIRST MEANS AND LIMITING THE DISPLACEMENT OF THE PUMP TO A PREDETERMINED MAXIMUM VALUE.
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) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |