Patent ID: 8561402
Filing Date: 2013-10-22
Classification: B60T

Abstract:
1. A master cylinder assembly for a hydraulic actuation system for a handlebar-steered vehicle, the master cylinder assembly comprising: a housing mountable to a frame member of the handlebar-steered vehicle and having a chamber including a fluid cavity with first and second fluid cavity regions, the first fluid cavity region being in fluid communication with the hydraulic actuation system, the housing including discrete first and second housing portions, the first housing portion having first and second end portions, the first end portion of the first housing portion extending axially into the second fluid cavity region creating an annular gap radially outboard of the first end portion extending into the second fluid cavity region, the second end portion of the first housing portion connected to the hydraulic actuation system; a piston assembly including a piston slidably disposed within the fluid cavity; and an actuator operatively connected to the housing and operatively connected to the piston to slidably displace the piston between an open fluid circuit position permitting fluid flow between the first and second fluid cavity regions and a closed fluid circuit position blocking fluid flow between the first and second fluid cavity regions.