Tractor protection valve

Details Tractor protection valve Tractor protection valve

1976-01-22

1977-04-26

Cline, William R.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

137 87, 137512, 303 28, G05D 700

Patent

active

040195252

ABSTRACT:
A tractor protection valve for use in the air brake system of a tractor-trailer vehicle combination to protect and maintain the braking system of the tractor includes a housing having tractor supply and control ports, trailer supply and control ports, and a pair of exhaust ports. The housing has a chamber with the exhaust ports being positioned at opposite ends of the chamber. First and second spring-biased pistons are axially movable in the chamber to control communication between the ports.

REFERENCES:
patent: 2634743 (1953-04-01), Audemar
patent: 2859763 (1958-11-01), Fites
patent: 2979069 (1961-04-01), Valentine
patent: 3104133 (1963-09-01), Valentine
patent: 3109442 (1963-11-01), Horowitz
patent: 3183919 (1965-05-01), Herring
patent: 3397925 (1968-08-01), Dobrikin
patent: 3413040 (1968-11-01), Horowitz
patent: 3862782 (1975-01-01), Horowitz
patent: 3866623 (1975-02-01), Klimek

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