Combination push-pull valve assembly

Details Combination push-pull valve assembly Combination push-pull valve assembly

1978-02-07

1980-11-11

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

303 13, 303 71, B60T 1300

Patent

active

042329086

ABSTRACT:
A two knob control for tractor and trailer parking brakes providing single knob application of both tractor and trailer parking brakes. It also provides for maintaining the tractor parking brakes in the applied condition while charging the trailer brake air system and for applying the trailer brakes independently of the tractor brakes. Automatic application of trailer parking brakes is provided upon trailer breakaway or a significant reduction in tractor reservoir air pressure.

REFERENCES:
patent: 3166358 (1965-01-01), Valentine
patent: 3519312 (1970-07-01), Cruse
patent: 3690733 (1972-09-01), Gachot
patent: 3747992 (1973-07-01), Schnipke
patent: 3953079 (1976-04-01), Sebo et al.
patent: 4076325 (1978-02-01), Bray
patent: 4088374 (1978-05-01), Gute
patent: 4121873 (1978-10-01), Durling

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