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US 2010/0117446 A1Published application
Two-stage master brake cylinder
OwnerEric Siegristinventor
Life of this patent
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Abstract
A two stage master brake cylinder uses a primary and secondary piston to displace an initial large volume of hydraulic fluid during a first stage and a second stage that continues brake actuation by displacing a reduced volume of hydraulic fluid determined by the secondary piston. A by-pass control valve is adjustable to vary transition from the first stage to the second stage.
Claims12
A two stage master cylinder comprising a primary piston, a secondary piston, a push actuator for moving said pistons to create a hydraulic fluid flow and pressure at an outlet of said master cylinder;
- and a by-pass control valve for opening a venting outlet associated with said primary piston upon actuation of said master cylinder and the pressure of the hydraulic fluid at said outlet reaching a predetermined pressure.
Dependencies are inferred from the claim text.