Patent ID: 6871729

Claim:
A brake or clutch master cylinder for a motorcycle/bicycle, of the type in which a body mounted on a handlebar forms a): a cylindrical shell for holding hydraulic fluid, closed by a piston which is operated by a hand lever in order to transfer the hydraulic fluid held in the shell to an actuator device, and b): the walls of a hydraulic-fluid reservoir communicating with the interior of the shell, wherein: the body is produced by moulding of plastics material reinforced with glass fibre, with the exclusion of any machining operations or metal inserts, the body has a sleeve forming a housing communicating with the interior of the cylindrical shell for the insertion of a male quick-fit hydraulic connector, locked axially by a first forked locking element inserted in at least one through-hole in the sleeve, the piston being held captive in the shell by a second forked locking element inserted in through-holes in the shell, the shell is partially contained in the volume of the reservoir with the axis of the cylindrical shell extending through the volume of the reservoir, and the walls of the reservoir form a support structure for two lugs on which the hand lever is articulated, and for a seat for the fixing of the body to a handlebar.