Park mechanism for vehicle transmission

Details Park mechanism for vehicle transmission Park mechanism for vehicle transmission

1995-11-02

1997-05-20

Luong, Vinh T.

Machine element or mechanism

Elements

Pawls and ratchets

74575, 74577M, 192 4A, 192 4C, G05G 100

Patent

active

056303394

ABSTRACT:
A park pawl in a transmission is rotatably supported on a manually rotatable control rod and resiliently biased toward engagement with a toothed output gear by a spring acting between the control rod and the pawl. A lost-motion driving connection provided between the control rod and the pawl function to permit movement of the pawl toward and away from engagement with the toothed output gear under influence of the spring and independent of the control rod position when the control rod is rotated to a Park position. However, when the control rod is rotated to a non-Park position, the driving connection is established to forcibly move the pawl out of engagement with the toothed output gear.

REFERENCES:
patent: 3601230 (1971-08-01), Platz
patent: 3703941 (1972-11-01), Ohie et al.
patent: 3815713 (1974-06-01), Dietrich
patent: 4369867 (1983-01-01), Lemieux
patent: 4421214 (1983-12-01), Sellmeyer
patent: 4518066 (1985-05-01), Barr
patent: 4576261 (1986-03-01), Barr
patent: 4671133 (1987-06-01), Yamada
patent: 5131288 (1992-07-01), Barlas
patent: 5170869 (1992-12-01), Svab et al.
patent: 5269195 (1993-12-01), Kitagawara
patent: 5295412 (1994-03-01), Donato et al.

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