Motor vehicles – With means for promoting safety of vehicle – its occupant or... – By preventing unauthorized or unintended access or use
Patent
1988-11-28
1989-11-21
Rice, Kenneth R.
Motor vehicles
With means for promoting safety of vehicle, its occupant or...
By preventing unauthorized or unintended access or use
188353, B60K 2700
Patent
active
048816159
ABSTRACT:
An anti-theft device for a motor vehicle having an hydraulically-operated braking system comprises a plunger engagable with a flexible sealing ring, to close the fluid path between the pressure fluid supply and the brake cylinders. The plunger is inserted into the ring to seal with generally axially extending portion of the ring projecting freely in the direction of flow towards the vehicle's brakes. Application of pressure from the supply flexes said portion to away from sealing contact with the plunger to permit flow of fluid from the pressure fluid supply to the brake cylinders. Return flow of fluid from the brake cylinders to the supply is however prevented, whereby the brakes can be applied but cannot thereafter be removed until the plunger is withdrawn. The device further comprises means for locking the plunger in its operative position.
REFERENCES:
patent: 3973805 (1976-08-01), Stevenson et al.
patent: 4446950 (1984-05-01), Wise et al.
patent: 4579202 (1986-04-01), McIntosh
patent: 4721192 (1988-01-01), Cano et al.
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