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US 3,944,286 AGranted
Brake system including means for ensuring parking brake release
AssigneeGeneral Signal Corporation
InventorsThomas H. Engle, Thomas M. Bogenschutz
Life of this patent
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Abstract
A brake system for a wheeled carrier having manually operable apparatus for actuating and locking parking brakes at the wheels, the system including automatically operable apparatus for ensuring release of the manually operable parking brakes when it is desired to move the vehicle.
Claims7
A brake apparatus for a vehicle, comprising:
- a first normally pressurized fluid line for transmitting fluid pressure corresponding to a desired brake application force;
- means responsive to reductions in the pressure in said first line for effecting service and emergency application of the brakes of said vehicle;
- means for locking said brakes to retain them in the applied condition and for unlocking said brakes to allow them to return to the released condition;
- independently operably parking brake actuating means for applying said brakes and actuating said locking means and for releasing said brakes and actuating said unlocking means;
- and
- means responsive to increases in the pressure in said first line means for automatically actuating said unlocking means as said first fluid line is repressurized following service or emergency brake application.
3 more elements
Dependencies are inferred from the claim text.