Automatic transmission

Details Automatic transmission Automatic transmission

2007-07-24

2007-07-24

Le, David D. (Department: 3681)

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

C475S146000, C192S03000R, C192S085060, C192S083000, C192S051000

Reexamination Certificate

active

11079379

ABSTRACT:
A forward/reverse change-over mechanism (3) of an automatic transmission comprises a forward clutch (5) inside a drum (7) with the base (7c) which rotates together with an input shaft (1). The forward clutch (5) engages by driving a piston (9) housed in the drum (7) by the oil pressure of an oil chamber (10) between a base (7c) and the piston (9). Projecting bearings (16) which seat the piston (9) are formed by press-forming at equal angular intervals concentrically with the axial center of the drum (7) in the base (7c). By installing a sensor body (18) which responds to the passage of depressions (17) formed underneath the bearings (16), the forward/reverse change-over mechanism (3) can be made compact and manufactured with a small number of parts and machining steps.

REFERENCES:
patent: 5069657 (1991-12-01), Taniguchi et al.
patent: 5388474 (1995-02-01), Tanaka et al.
patent: 5865289 (1999-02-01), Ishimaru
patent: 2004/0094383 (2004-05-01), Kinoshita et al.
patent: 59-009356 (1984-01-01), None
patent: 04-272563 (1992-09-01), None
patent: 09-032918 (1997-02-01), None
patent: 10-339368 (1998-12-01), None
patent: 2001-090817 (2001-04-01), None

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