Automatic transmission shift control device

Details Automatic transmission shift control device Automatic transmission shift control device

1988-10-14

1991-07-09

Herrmann, Allan D.

Conveyors, chutes, skids, guides, and ways

Chutes

Unloading

74475, B60K 4128

Patent

active

050296809

ABSTRACT:
An automatic transmission shift control device which prevents shifting from the "Park" position to any other position unless the ignition key is at the "on" position and the brake pedal is fully depressed. A safety feature is incorporated so as to insure against accidental gear shifting. To shift the control from the "Park" position a control button located on the shift handle is manually pressed. The control button mechanically depresses a linkage rod which in turn moves the shift position pin out of its "Park" locking position. However, the linkage rod cannot move downward unless a bushing which has clearance slots for the position pin is rotated by a solenoid, which is acuated only when the ignition is "on" and the brake pedal is pressed. Also, the bushing surface in proximity to the bushing slots is shaped so as to prevent accidental engagement of the positioning pins.

REFERENCES:
patent: 4304112 (1981-12-01), Osborn
patent: 4365522 (1982-12-01), Kubota et al.
patent: 4473141 (1984-09-01), Mochida
patent: 4474085 (1984-10-01), De Vogelaere et al.
patent: 4610179 (1986-09-01), Parker
patent: 4660443 (1987-04-01), Simancik
patent: 4768610 (1988-09-01), Pagel et al.
patent: 4884668 (1989-12-01), Kobayashi et al.

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