Patent ID: 6502673
Filing Date: 2003-01-07
Classification: F16D

Abstract:
A cylinder device for a disc brake comprising:a caliper having an inner actuator, an outer reaction leg, and a bridge extending between and connecting said actuator and said reaction leg; a piston slidably received in a cylinder bore formed in said actuator; a dust boot having an intermediate flexible portion and thick ring portions at opposite ends thereof, wherein one of said thick ring portions is fit into an outer circumferential groove on said piston and the other of said thick ring is fit into an inner circumferential groove of said cylinder bore adjacent to the open end thereof, and said flexible portion of said dust boot is received in a large diameter bore stepped up from said cylinder bore and defined by said bridge and a peripheral portion extending at least at a disc rotor center side of said actuator opposite said bridge, said flexible portion is surrounded by said peripheral portion, wherein a cutout, through which a human finger may pass upon installing said dust boot in said inner circumferential groove of said cylinder bore, is formed on said peripheral portion on said disc rotor center side of said actuator.