Patent ID: 6804961
Filing Date: 2004-10-19
Classification: B60T,B62L,Y10T

Abstract:
A master cylinder for a bicycle hydraulic disc brake, the master cylinder comprising:a housing defining a cylinder, the cylinder having a first and a second end; a hydraulic fluid reservoir; a port between the hydraulic fluid reservoir and the cylinder providing fluid communication between the hydraulic fluid reservoir and the cylinder, the port having a port opening located between the first and second ends of the cylinder; a piston received in the cylinder having a radial seal, the piston being movable between a select starting position with the seal between the first end and the port opening with the seal a select distance from the port opening and a pressurized position with the seal between the port opening and the second end, the radial seal preventing fluid flow between the cylinder and the reservoir when positioned between the port opening and the second end to pressurize the second end; dead band adjustment means operatively associated with the piston for moving the select starting position to adjust the select distance between the port opening and the seal; a lever pivotably attached to the housing, the lever being operatively associated with the piston to move the piston between the select starting position and the pressurized position as the lever is pivoted between a rest position and a fully actuated position; and compensating means operatively associated with the dead band adjustment means and the lever to maintain the lever in a select rest position as the dead band adjustment means is actuated to move the select starting position.