US3298174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for infinitely variable automatic transmission
Assignee: Fairchild Hiller Corp
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Filing: 1965-06-11
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Granted: 1967-01-17
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Expires: 1985-06-11
Abstract
No abstract record available.
Inventors
- 👤 Ludwig T Stoyke
- 👤 Kenneth W Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:01
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/462; F16H47/00; F16H47/02; F16H47/04; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0833; F16H37/084; F16H2037/0866; F16H2047/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN A CONTROL SYSTEM FOR AN INFINITELY VARIABLE HYDROSTATIC TRANSMISSION OF THE TYPE HAVING PUMP AND MOTOR UNITS WITH INTERCONNECTING FLUID PRESSURE AND RETURN CONDUITS AND AN ASSOCIATED PRIME MOVER THE COMBINATION COMPRISING: A SPEED GOVERNOR DRIVEN BY THE PRIME MOVER AT A SPEED SUBSTANTIALLY PROPORTIONAL TO THE PRIME MOVER SPEED FOR PRODUCING OUTPUT SIGNALS REPRESENTATIVE OF THE PRIME MOVER SPEED, SAID GOVERNOR INCLUDING: (A) VALVE WITH OUTPUT PORTS, (B) A SPOOL POSITIONABLE IN RESPONSE TO THE PRIME MOVER SPEED TO VARY THE PRESSURE OUTPUT SIGPUT SIGNALS FROM THE PORTS, AND (C) MEANS OPERATING WITH SAID SPOOL TO PRODUCE A SUBSTANTIALLY LINEAR RELATIONSHIP BETWEEN THE PRESSURE OUTPUT SIGNALS FROM THE PORTS AND THE PRIME MOVER SPEED,
Claim 2
Dependent Claim
116 words
IN A CONTROL SYSTEM FOR AN INFINITELY VARIABLE HYDROSTATIC TRANSMISSION OF THE TYPE HAVING PUMP AND MOTOR UNITS WITH INTERCONNECTING FLUID PRESSURE AND RETURN CONDUITS AND AN ASSOCIATED PRIME MOVER THE COMBINATION COMPRISING: A SPEED GOVERNOR DRIVEN BY THE PRIME MOVER AT A SPEED SUBSTANTIALLY PROPORTIONAL TO THE PRIME MOVER SPEED FOR PRODUCING OUTPUT SIGNALS REPRESENTATIVE OF THE PRIME MOVER SPEED, SAID GOVERNOR INCLUDING: (A) VALVE WITH OUTPUT PORTS, (B) A SPOOL POSITIONABLE IN RESPONSE TO THE PRIME MOVER SPEED TO VARY THE PRESSURE OUTPUT SIGPUT SIGNALS FROM THE PORTS, AND (C) MEANS OPERATING WITH SAID SPOOL TO PRODUCE A SUBSTANTIALLY LINEAR RELATIONSHIP BETWEEN THE PRESSURE OUTPUT SIGNALS FROM THE PORTS AND THE PRIME MOVER SPEED,
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) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |