Fluid-pressure and analogous brake systems – Flow retarder – Isolation valve
Patent
1994-07-08
1997-07-22
Graham, Matthew C.
Fluid-pressure and analogous brake systems
Flow retarder
Isolation valve
188351, 188 716, B60T 1500
Patent
active
056497466
ABSTRACT:
A self-purging vehicle braking system and method of purging gas from same are provided by the present invention. The braking system preferably includes a disk brake and a master cylinder in fluid communication with the disk brake. The master cylinder preferably has a piston chamber, a piston disposed within the piston chamber and moveable between an extended and a retracted position which defines a working volume of fluid moved by the piston, and a fluid reservoir in fluid communication with the piston chamber and adapted to supply fluid thereto. A manifold connects in fluid communication with the piston chamber and the disk brake. An inlet brake line interconnects the manifold to the disk brake for supplying brake fluid to the disk brake, and an outlet brake line interconnects the disk brake to the manifold for returning fluid from the disk brake. A flow controller connects in fluid communication with the inlet and outlet brake lines to control fluid flow during operation of the braking system. The manifold has a predetermined volume less than the working volume of the piston so that the master cylinder withdraws the working volume of hydraulic fluid from the manifold and the outlet brake line when the piston moves from the extended to the retracted position so as to collect a portion of the fluid from the outlet brake line in the piston chamber and thereby permit gas contained therein to vent through the fluid reservoir.
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patent: 4373333 (1983-02-01), Coleman
patent: 4799575 (1989-01-01), Kroniger
patent: 5350223 (1994-09-01), Stewart, Jr.
"Wildwood Self Bleeding Brake Fluid System," Brochure dated Mar. 23, 1993.
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