BigPatents India

The invention concerns a master cylinder comprising a substantially axial body (12) inside a bore (14) whereof is mounted sliding at least an axial piston, of the type wherein the bore (14) comprises two front and rear sealing means interposed between the piston and the bore, the front sealing means delimiting in the bore (14) rear and front feeding chambers, of the type wherein the body (12) comprises a feeding conduit (42,48) connecting an external reservoir to the rear feeding chamber and emerging between the two sealing means. The invention is characterised in that said bore (14) comprises a front section (120, L24) for guiding the piston, arranged in front of the front sealing means, which comprises at least a groove (128) communicating the front chamber and the front sealing means to enable, when the piston moves back to its neutral position, replenishing of the radial feeding conduit (42, 4-8) and of the reservoir.