Tractor air pressure braking system

Details Tractor air pressure braking system Tractor air pressure braking system

B - Operations, Transporting

60

T

303/86

B60T 13/38 (2006.01) B60T 13/26 (2006.01)

Patent

CA 1305987

ABSTRACT OF THE DISCLOSURE A fluid pressure braking system for a heavy vehicle is provided with a supply reservoir and a pair of service reservoirs which are charged from the supply reservoir through a corresponding pair of pressure protection valves. The emergency/parking braking system is charged directly from the supply reservoir through a pressure protection valve which is set to open at a pressure level greater than that at which the pressure protection valves protecting the service reservoirs open. Accordingly, it is not possible to release the emergency spring brakes until the service reservoirs are charged to a safe operating level, and it is not possible to bleed down both of the service reservoirs and to thereby effect an emergency brake application due to a single failure in the systems.

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