Parking brake valve

Details Parking brake valve Parking brake valve

1994-03-14

1995-05-09

Oberleitner, Robert J.

Brakes

Operators

Fluid pressure

188 111, 180287, B60T 1100, B60R 2500

Patent

active

054131979

ABSTRACT:
A parking brake valve includes a magnetically attractable sled containing fluid stoppers and fluid passers that moves along a track, a fluid exchange unit, solenoids at either end of the track and a remote actuator. The parking brake valve is added to an existing hydraulic vehicle braking system. When the existing braking system is actuated, braking fluid is forced through the parking brake valve. Activating a locking solenoid attracts the sled into a fluid interrupting or locking position, thereby locking the brake system in a braking state. Activating an unlocking solenoid moves the sled such that brake fluid can again flow through the parking brake valve, thereby allowing the braking system to function normally. Integral fluid pressure valves allow the monitoring of fluid pressure within the parking brake valve allowing operation to be monitored. Frequency matching and security identification prevent unauthorized use while a safety switch ensures that fluid interrupting is possible only when the vehicle is shifted into park.

REFERENCES:
patent: 4546846 (1985-10-01), Myers

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