HYDRAULIC BRAKE BOOSTER WITH BALL VALVES

摘要

A hydraulic brake booster is disclosed which includes a pair of ball valves which control fluid communication between the booster pressure chamber and the fluid pressure source and between the booster pressure chamber and a fluid reservoir. Each of the ball valves is provided with a valve stem. Each of the valve stems engage opposite sides of an operator-operated lever which extends between stems. The lever is normally urged toward a position opening one of the valves to communicate the chamber with the reservoir and closing the other valve. However, when a brake application is effected, the lever is shifted to close fluid communication between the pressure chamber and the reservoir and initiate fluid communication between the pressure source and the pressure chamber.