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US3916727A Expired / Lapsed US ⏱️ 0.0 years remaining

Vehicle transmissions

Assignee: Renault SA
•
Filing: 1974-06-10
•
Granted: 1975-11-04
•
Expires: 1994-06-10
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Abstract

Abstract This invention relates to automatic transmissions for vehicles, and particularly to transmissions which consist of a planetary gear train, a hydrodynamic torque-converter and a differential, the mechanism being housed in a main housing and the converter being housed in a second housing, these housings being separable along a plane perpendicular to the axis of rotation of the gear train: such transmissions also incorporate braking and clutch members including friction discs which are controlled by rams which co-operate with the components of the planetary gear train, and a pump is provided to supply said ram for controlling the braking and clutch methods. In accordance with the invention, the said main housing of the mechanism contains a detachable partition and bearing support having a front face which is directed towards the converter housing, and a rear face which forms a contact surface for friction discs included in the braking member and for return members of a piston of a ram means which controls said braking member.

Inventors

  • 👤 Jean Piret

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 22:24
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; F16H47/08; F16H2200/00; F16H2200/20; F16H2200/202; F16H2200/2023

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 135 words
In an automatic vehicle transmission of the kind comprising of a planetary gear train transmission mechanism, a hydrodynamic torque-converter, a differential, a main housing for said mechanism and a main housing for said converter these latter being separable along a plane perpendicular to the axis of rotation of said gear train, braking and clutch members including friction discs which are controlled by ram means which co-operate with the components of said planetary gear train, and a pump to supply said ram means, the improvement wherein said main housing contains a detachable partition and bearing support having a front face which is directed towards said converter housing, and a rear face which forms a contact surface for said friction discs included in said braking member and for return members of a piston of said ram means.
Claim 2
Dependent Claim 135 words
In an automatic vehicle transmission of the kind comprising of a planetary gear train transmission mechanism, a hydrodynamic torque-converter, a differential, a main housing for said mechanism and a main housing for said converter these latter being separable along a plane perpendicular to the axis of rotation of said gear train, braking and clutch members including friction discs which are controlled by ram means which co-operate with the components of said planetary gear train, and a pump to supply said ram means, the improvement wherein said main housing contains a detachable partition and bearing support having a front face which is directed towards said converter housing, and a rear face which forms a contact surface for said friction discs included in said braking member and for return members of a piston of said ram means.
Claim 3
Dependent Claim 38 words
A transmission according to claim 1, wherein said detachable partition is recessed, and in said recess are arranged co-axial components of said transmission mechanism, said components being situated at increasing distances from the longitudinal axis of said mechansim.
Claim 4
Dependent Claim 79 words
A transmission according to claim 2, wherein said planetary gear train includes a ring gear arranged in said recess in said partition, said ring gear being carried by an output pinion of said mechanism which turns on a sleeve which latter forms a bearing for the forward-sun-gear of said planetary gear train, said forward-sun-gear meshing with a set of planetary gears, said sleeve being mounted directly in a cover of a pump which is fixed to said converter housing.
Claim 5
Dependent Claim 25 words
A transmission according to claim 1, wherein said partition contains a bearing in which a shaft of an intermediate transmission pinion is mounted to rotate.
Claim 6
Dependent Claim 31 words
A transmission according to claim 1, wherein said main housing has a single assembly and sealing joint lying in the junction plane between said housings for said converter and said mechanism.

References Cited (Backward Citations)

US3107553A Cited
US3482469A Cited
US3554057A Cited
US3648544A Cited
US3741037A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-11-03 1979-05-05 1979-11-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-11-03 1983-05-05 1983-11-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-11-03 1987-05-05 1987-11-04 $7700.00 Window Closed / Lapsed

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