Parking mechanism for a power transmission

Details Parking mechanism for a power transmission Parking mechanism for a power transmission

1993-06-02

1994-11-22

Luong, Vinh T.

Machine element or mechanism

Control lever and linkage systems

Elements

74575, 74577M, 74577R, 192 4A, 188 31, 188 69, G05G 506, G05G 100

Patent

active

053658043

ABSTRACT:
A countershaft type power transmission has a plurality of selectively engageable friction clutches for establishing a plurality of forward drive ratios and a reverse drive ratio between meshing gear members on an input shaft, a countershaft and an output shaft. One of the power paths established by the meshing gears includes a gear member rotationally fast on the output shaft. A parking pawl member is selectively engageable with this gear member to prevent output shaft rotation when parking is desired. The pawl has teeth formed thereon having a profile which permit continuous simultaneous engagement between two teeth on the pawl and two teeth on the gear member regardless of the rotational bias imposed on the output shaft during parking.

REFERENCES:
patent: 3601231 (1969-03-01), Kolacz
patent: 3990541 (1976-11-01), Dobrinska et al.
patent: 4029267 (1977-06-01), Slipper
patent: 4089394 (1978-05-01), Haupt et al.
patent: 4157745 (1979-06-01), Nelson
patent: 4310081 (1982-01-01), Kolacz
patent: 4413712 (1983-11-01), Richard
patent: 5170869 (1992-12-01), Svab et al.
patent: 5182959 (1993-02-01), Chern et al.
patent: 5269195 (1993-12-01), Kitagawara

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