Valve for automatic brake system

Details Valve for automatic brake system Valve for automatic brake system

1992-02-18

1993-08-10

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

3031192, B60T 864

Patent

active

052342654

ABSTRACT:
A brake valve for an automatic brake system includes an actuator responsive to feedback pressure from a brake for regulating pressure in the brake proportional to an electrical signal applied to the actuator. The actuator exerts a force that is opposed by feedback pressure acting against a predetermined area of the actuator. Valves operated by the actuator provide for alternately communicating a supply of pressurized air to the brake cylinders or discharging air pressure from the cylinders. A low-flow vent valve provides for discharging small quantities of air from my valve. However, a pilot operated high-flow dump valve supersedes the low-flow vent valve for discharging larger quantities of air and permits my valve to be controlled by smaller actuating forces.

REFERENCES:
patent: 2194762 (1940-03-01), Maliphant
patent: 2527883 (1956-10-01), Ingres et al.
patent: 2919162 (1959-12-01), Roberts
patent: 3525555 (1970-08-01), Meyer et al.
patent: 3924902 (1975-12-01), Engle
patent: 4539542 (1985-09-01), Clark
patent: 4557527 (1985-12-01), Stumpe
patent: 4604600 (1986-08-01), Clark
patent: 4605197 (1986-08-01), Casey et al.
patent: 4860794 (1989-08-01), Parrott et al.
patent: 5015046 (1991-05-01), Bissell
patent: 5100208 (1992-03-01), Angermair

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