Proportioning relay valve disabled by failed front braking circu

Details Proportioning relay valve disabled by failed front braking circu Proportioning relay valve disabled by failed front braking circu

1993-03-24

1994-08-23

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

188349, 303 963, 303 966, 303 971, 303 975, 303 40, B60T 1112

Patent

active

053402120

ABSTRACT:
A fluid pressure braking system for a tractor-trailer combination vehicle includes a proportioning relay valve which controls communication to the rear wheel brakes of the tractor. When the tractor pulls a trailer, the proportioning control within the relay valve is disabled, but when the vehicle is operated in the "bobtail" mode without pulling a trailer a proportioned brake application is effected in which the braking pressure communicated to the rear brake actuator is a predetermined percentage of that in the front wheel braking circuit. The proportioning mechanism is also disabled when the front axle braking circuit malfunctions, so that upon loss of pressure of the front axle system, the driver effects a non-proportioned rear brake application.

REFERENCES:
patent: 3190700 (1965-06-01), Fites
patent: 3259439 (1966-07-01), Bueler
patent: 4050746 (1977-09-01), Durling
patent: 4230373 (1980-10-01), Plantan
patent: 4368926 (1983-01-01), Bartholomew
patent: 4383717 (1983-05-01), Bueler
patent: 4410218 (1983-10-01), Bueler
patent: 4455052 (1984-06-01), Beuler
patent: 4553789 (1985-11-01), Pugh et al.
patent: 4571007 (1986-02-01), Carmichael et al.
patent: 4725101 (1988-02-01), Szudy et al.
patent: 4758051 (1988-07-01), Szudy et al.
patent: 4850651 (1989-07-01), Latvala

Affiliated with

Also associated with

Rating

Proportioning relay valve disabled by failed front braking circu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Proportioning relay valve disabled by failed front braking circu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Proportioning relay valve disabled by failed front braking circu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-498663