Fluid control cylinder assembly for automobile brake system

Abstract

A brake fluid control cylinder assembly for use in a brake system of an automobile comprises a cylindrical housing, two coaxially-spaced chambers therein and an internal flange wall therebetween, a coaxial opening in the flange wall, front and rear pistons slidable in the respective chambers, each having respective piston rods extending therefrom, brake fluid inlets and outlets for each chamber, check valves in the outlets to allow flow of pressurized brake fluid to the wheel cylinders, a bracket for mounting the housing on the vehicle body, a lever arm pivotally mounted on the bracket and engageable by a member extending from the clutch pedal, a push rod on the lever arm engageable with the rear piston so that operation of the clutch pedal moves both pistons in the direction to pressurize brake fluid in the chambers and cause flow through the check valves to actuate the brakes, and a sliding pin spring-urged into the rear of the rear cylinder chamber to engage the rear end of the rear piston upon return thereof when the clutch pedal is operated, so that the clutch pedal functions as an auxiliary brake to maintain the brakes in the actuated position when the automobile is stopped on an incline and the brake pedal is released. During normal use, the brake system acts in a conventional manner, the brake fluid passing through the inlets, cylinder chambers, and outlets of the control cylinder.