Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1989-11-01
1990-11-27
Reger, Duane A.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
188170, 303 2, B60T 1344
Patent
active
049731076
ABSTRACT:
A dual pressure vehicle air brake system (60, 61, 100, 101) made according to the invention includes first and second sources (62, 64) of pressurized air at, for example, 175 psi and 100 psi, respectively. A combination brake actuator (6) includes a conventional service brake chamber (8) adapted to accommodate the lower, second air pressure while the spring brake chamber (10) is made to accommodate the higher, first pressure. The use of the higher first pressure allows a stiffer actuator spring to be used and be fully deflected by the first pressure without substantially changing actuator piston areas and other elements of conventional combination brake actuators. A conventional modulated spring brake control valve (78) is used to supply air at the first pressure to the spring brake chamber. The service brake chamber is supplied with air at the second pressure through the outlet of a conventional service brake application valve (68). Compounding of brake forces, which could occur if both the service and spring brakes were applied simultaneously, may be reduced or eliminated using a conventional two-way check valve (50 ) or a novel shut off valve (102).
REFERENCES:
patent: 3456988 (1969-07-01), Gibbons et al.
patent: 4003605 (1977-01-01), Fannin
patent: 4191428 (1980-03-01), Durling
patent: 4407548 (1983-10-01), Graham
patent: 4589704 (1986-05-01), Graham
LandOfFree
Dual pressure air brake system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dual pressure air brake system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual pressure air brake system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1028122