Tractor-trailer fluid pressure brake monitoring system

Details Tractor-trailer fluid pressure brake monitoring system Tractor-trailer fluid pressure brake monitoring system

1987-09-28

1988-12-27

Reger, Duane A.

Fluid-pressure and analogous brake systems

Locks

180287, 188353, B60T 1716

Patent

active

047936614

ABSTRACT:
In a vehicle such as a tractor or a trailer having fluid-operated spring brakes to which fluid is supplied under pressure for releasing the brakes from a locked condition, security means are provided to prevent unauthorized release of the brakes. The security means comprises a bistable solenoid valve for controlling the supply of fluid to the brakes, energizing circuit means for operating the valve, and limited access switching means operable to set the solenoid valve selectively in an open or a closed condition.

REFERENCES:
patent: 3559755 (1971-02-01), Pond
patent: 3998495 (1976-12-01), Maxwell et al.
patent: 4014579 (1977-03-01), DuBois
patent: 4519653 (1985-05-01), Smith
patent: 4721192 (1988-01-01), Cano et al.

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