Solenoid parking brake release

Details Solenoid parking brake release Solenoid parking brake release

1989-12-04

1991-07-09

Herrmann, Allan D.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 4C, 74531, F16D 6528

Patent

active

050296817

ABSTRACT:
A solenoid parking brake release assembly (10) for setting a parking brake (12) and automatically releasing the parking brake (12) includes a lever (26) connected to the foot pedal (28) for rotating a rack portion (30) upon depression thereof. The rack portion (30) coacts to rotate a gear (46) about which is a torsion spring (54) which frictionally grips the gear (46) to maintain same in a rotated position. The torsion spring (54) includes a first end connected to the core element (66) of a solenoid (64) such that upon energization of the solenoid (64), the core element (66) is drawn into the solenoid (64) which releases the frictionaly grip on the gear (46) allowing the parking brake (12) to be released. The solenoid (64) is energized by the gear voltage from the gear selector (14) of a vehicle transmission when the ignition is on, the parking brake (12) is depressed, and one of the forward or reverse gears are selected.

REFERENCES:
patent: 2821275 (1958-01-01), Martin
patent: 3236120 (1966-02-01), Fender
patent: 3236121 (1966-02-01), Gdowik et al.
patent: 3315538 (1967-04-01), Fender
patent: 3509505 (1970-04-01), Zagrzjewski
patent: 3509506 (1970-04-01), Bird
patent: 3800774 (1989-01-01), Hogiwara et al.
patent: 3822469 (1974-07-01), Lazenby
patent: 3952774 (1976-04-01), Loveless
patent: 4421214 (1983-12-01), Sellmeyer
patent: 4450423 (1984-05-01), Morishita
patent: 4462487 (1984-07-01), Warwick et al.
patent: 4553650 (1985-11-01), Warwick et al.

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