Patent US3302389A successfully refreshed from Google Patents.
US3302389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulating devices of barrel-type hydraulic transmission systems
Assignee: Automobiles Citroen SA
•
Filing: 1965-07-19
•
Granted: 1967-02-07
•
Expires: 1985-07-19
Abstract
No abstract record available.
Inventors
- 👤 Cadiou Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:09
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/42; F16H61/423; F16H61/433; F16H61/46; F16H61/468
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
A DEVICE FOR AUTOMATICALLY ENSURING, FOR A GIVEN POWER OUTPUT, THE CONSTANCY OF THE INPUT TORQUE OF A HYDRAULIC TRANSMISSION COMPRISING A GENERATOR AND A RECEIVER BOTH OF THE ROTARY-BARREL TYPE, APPLICABLE NOTABLY TO AUTOMOTIVE VEHICLES, WHICH INCORPORATES A COMPENSATOR BEAM, A FIRST CYLINDER EXERTING ON SAID BEAM A THRUST OF A VALUE SUBORDINATE TO THE ENGINE SPEED, A SECOND CYLINDER EXERTING ON SAID BEAM A THRUST PROPORTIONAL TO THE HIGH PRESSURE OF SAID TRANSMISSION, A MOVABLE ABUTMENT CONNECTED TO AN IMPELLER PLATE AND EXERTING ON SAID BEAM A REACTION BALANCING THE AFORESAID TWO THRUSTS, A THIRD CYLINDER FOR INCREASING THE CUBIC CAPACITY OF SAID GENERATOR IN OPPOSITION TO A FOURTH RETURN CYLINDER HAVING A SMALLER CROSS-SECTIONAL AREA, A FIFTH CYLINDER FOR DECREASING THE CUBIC CAPACITY OF SAID RECEIVER IN OPPOSITION TO A SIXTH RETURN CYLINDER OF SMALLER CROSS-SECTIONAL AREA, SAID FOURTH AND SIXTH CYLINDERS BEING PERMANENTLY FED FROM THE LOW-PRESSURE SIDE OF THE TRANSMISSION, A FIRST DISTRIBUTOR CONTROLLED BY SAID FIRST CYLINDER AND FED FROM SAID LOW-PRESSURE SIDE, THE OUTLET OF SAID DISTRIBUTOR BEING EITHER CONNECTED TO SAID LOW-PRESSURE SIDE, OR CUT OFF, OR CONNECTED TO THE EXHAUST ACCORDING AS TO WHETHER THE MOMENT DUE TO SAID FIRST CYLINDER IS HIGHER, EQUAL OR INFERIOR TO THAT OF SAID SECOND CYLINDER, A SECOND SLIDEVALVE DISTRIBUTOR CONTROLLED BY PURELY HYDRAULIC MEANS
Claim 2
Independent Claim
220 words
A DEVICE FOR AUTOMATICALLY ENSURING, FOR A GIVEN POWER OUTPUT, THE CONSTANCY OF THE INPUT TORQUE OF A HYDRAULIC TRANSMISSION COMPRISING A GENERATOR AND A RECEIVER BOTH OF THE ROTARY-BARREL TYPE, APPLICABLE NOTABLY TO AUTOMOTIVE VEHICLES, WHICH INCORPORATES A COMPENSATOR BEAM, A FIRST CYLINDER EXERTING ON SAID BEAM A THRUST OF A VALUE SUBORDINATE TO THE ENGINE SPEED, A SECOND CYLINDER EXERTING ON SAID BEAM A THRUST PROPORTIONAL TO THE HIGH PRESSURE OF SAID TRANSMISSION, A MOVABLE ABUTMENT CONNECTED TO AN IMPELLER PLATE AND EXERTING ON SAID BEAM A REACTION BALANCING THE AFORESAID TWO THRUSTS, A THIRD CYLINDER FOR INCREASING THE CUBIC CAPACITY OF SAID GENERATOR IN OPPOSITION TO A FOURTH RETURN CYLINDER HAVING A SMALLER CROSS-SECTIONAL AREA, A FIFTH CYLINDER FOR DECREASING THE CUBIC CAPACITY OF SAID RECEIVER IN OPPOSITION TO A SIXTH RETURN CYLINDER OF SMALLER CROSS-SECTIONAL AREA, SAID FOURTH AND SIXTH CYLINDERS BEING PERMANENTLY FED FROM THE LOW-PRESSURE SIDE OF THE TRANSMISSION, A FIRST DISTRIBUTOR CONTROLLED BY SAID FIRST CYLINDER AND FED FROM SAID LOW-PRESSURE SIDE, THE OUTLET OF SAID DISTRIBUTOR BEING EITHER CONNECTED TO SAID LOW-PRESSURE SIDE, OR CUT OFF, OR CONNECTED TO THE EXHAUST ACCORDING AS TO WHETHER THE MOMENT DUE TO SAID FIRST CYLINDER IS HIGHER, EQUAL OR INFERIOR TO THAT OF SAID SECOND CYLINDER, A SECOND SLIDEVALVE DISTRIBUTOR CONTROLLED BY PURELY HYDRAULIC MEANS
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |