Spring-loaded parking brake and service-brake system for trailer

Details Spring-loaded parking brake and service-brake system for trailer Spring-loaded parking brake and service-brake system for trailer

1986-02-21

1987-10-06

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

188106R, 188170, 303 601, 303 20, 303 9, 303 15, 303 71, B60T 1338, B60T 1368

Patent

active

046978526

ABSTRACT:
A spring-loaded parking-brake and service-brake system for trailers of motor-vehicle combinations is provided which increases safety. The system does this by allowing the service brake of the trailer to respond at the same time as the service brake of the towing motor vehicle, and the spring-loaded parking brake of the trailer to respond at the same time as the parking brake of the motor vehicle. To guarantee safe parking and maneuvering of the uncoupled trailer, the control system of the spring-loaded trailer parking brake is electrical, and furthermore the service brake is also controlled by an additional electrical signal. For this purpose two electrical coupling parts, a pneumatic control-line coupling and a pneumatic supply coupling are attached to the trailer.

REFERENCES:
patent: 2985489 (1961-05-01), Stelzer
patent: 3497267 (1970-02-01), Dobrikin
patent: 3507542 (1970-04-01), Cannella
patent: 3907071 (1975-09-01), Wells
patent: 3973805 (1976-08-01), Stevenson et al.
patent: 3984149 (1976-10-01), Reinecke et al.
patent: 4057297 (1977-11-01), Beck et al.
patent: 4400039 (1983-08-01), Ogata
patent: 4522450 (1985-06-01), Heilhecker et al.
patent: 4568129 (1986-02-01), Stumpe
patent: 4585278 (1986-04-01), Grauel et al.
patent: 4593954 (1986-06-01), Campanini

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