Patent ID: 7487638
Filing Date: 2009-02-10
Classification: B62L

Abstract:
1. A bicycle hydraulic brake actuation device comprising: a hydraulic master cylinder housing having a bore; a master piston and a radial seal received in the bore; a push rod configured to move the master piston and the radial seal between a neutral position and a braking position; a lever pivotally attached to the housing for pivotal movement about a lever pivot axis between an at rest position and a brake actuation position, the lever including a contact surface configured and arranged to move the push rod as the lever is pivoted between the at rest position and the brake actuation position, the push rod including at least one roller slidably contacting the contact surface of the lever to move from a first contact point to a second contact point as the lever is pivoted from the at rest position to the brake actuation position, respectively, with the second contact point being closer to the lever pivot axis than the first contact point.