Patent US3186170A successfully refreshed from Google Patents.
US3186170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable ratio hydraulic transmissions
Assignee: Sigma
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Filing: 1963-06-24
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Granted: 1965-06-01
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Gauthier Robert
- 👤 Dumas Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:34
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/472
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN A SYSTEM COMPRISING AN INTERNAL COMBUSTION ENGINE AND AN PART TO BE DRIVEN BY SAID ENGINE, THE COMBINATION OF A HYDRAULIC TRANSMISSION COMPRISING TWO HYDRAULIC MACHINES, ONE MECHANICALLY COUPLED WITH SAID ENGINE AND THE OTHER WITH SAID PART, RESPECTIVELY, TWO PIPES EACH CONNECTING THE OUTPUT OF ONE OF SAID MACHINES WITH THE INPUT OF THE OTHER, RESPECTIVELY, SO AS TO FORM A CLOSED CIRCUIT WHEREIN ONE OF SAID MACHINES WORKS AS A PUMP AND THE OTHER AS A HYDRAULIC MOTOR, MOVABLE MEANS FOR CONTINUOUSLY VARYING THE FLOW RATE PER REVOLUTION OF AT LEAST ONE OF SAID MACHINES, TWO CONTINUOUSLY MOVABLE MEMBERS EACH OPERATIVELY CONNECTED IN A UNIDIRECTIONAL MANNER
Claim 2
Dependent Claim
109 words
IN A SYSTEM COMPRISING AN INTERNAL COMBUSTION ENGINE AND AN PART TO BE DRIVEN BY SAID ENGINE, THE COMBINATION OF A HYDRAULIC TRANSMISSION COMPRISING TWO HYDRAULIC MACHINES, ONE MECHANICALLY COUPLED WITH SAID ENGINE AND THE OTHER WITH SAID PART, RESPECTIVELY, TWO PIPES EACH CONNECTING THE OUTPUT OF ONE OF SAID MACHINES WITH THE INPUT OF THE OTHER, RESPECTIVELY, SO AS TO FORM A CLOSED CIRCUIT WHEREIN ONE OF SAID MACHINES WORKS AS A PUMP AND THE OTHER AS A HYDRAULIC MOTOR, MOVABLE MEANS FOR CONTINUOUSLY VARYING THE FLOW RATE PER REVOLUTION OF AT LEAST ONE OF SAID MACHINES, TWO CONTINUOUSLY MOVABLE MEMBERS EACH OPERATIVELY CONNECTED IN A UNIDIRECTIONAL MANNER
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) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |