Patent ID: 6378304
Filing Date: 2002-04-30
Classification: B60T,F16D

Abstract:
Apparatus (10) for hydraulic brake or clutch control, comprising at least one cylinder which includes a cylinder body (17) having at the front a base portion (24) and being open at the rear, a piston (21, 42) sliding axially in an internal bore (22) of the cylinder body (17), and at least one dynamic sealing member (59A, 59C) carried by the cylinder body (17, 17B) for cooperation with an outer periphery (42) of the piston (21), wherein the cylinder body (17) is of synthetic material, and wherein the piston (21) has a front face (31) bounding a hydraulic chamber (20), wherein the cylinder body (17) includes, arranged consecutively in the axial direction from front to rear, a blind front piece (17A) which includes said base portion (24), a central piece (17B), and a rear piece (17C) which is open towards the rear, said front, central and rear pieces being joined together in a sealed manner, wherein the internal bore (22) consists of a front portion (22A) and a rear portion (22C), which are formed in the front piece (17A) and rear piece (17C) respectively of the cylinder body (17), said piston extending within said internal bore (22) from said front portion (22A) to said rear portion (22C), and wherein said dynamic sealing member (59A, 59C) is mounted in the central piece (17B) of the cylinder body (17).