MASTER CYLINDER AND METHOD FOR PROCESSING MASTER CYLINDER BODY

摘要

PROBLEM TO BE SOLVED: To provide a master cylinder and method for processing a master cylinder body capable of preventing attraction to the cylinder body of a seal member when the master cylinder is vacuum-filled with a working fluid without increasing a manhour of processing. SOLUTION: This cylinder has a cylinder body 15 having an emission path of a working fluid and a supplying path 35 communicated with a reservoir; a piston slidably inserted in the cylinder body 15 and forming a pressure chamber supplying liquid pressure to the emission path between the piston and the cylinder body 15; and a seal member accommodated in a peripheral groove 25 formed at the cylinder body 15 and defining the supplying path 35 and the cylinder body 15 with an inner periphery in slidable contact with the piston. A groove 36 communicating the peripheral groove 25 of the cylinder body 15 with the supplying path 35 is formed concentrically with the supplying path 35. COPYRIGHT: (C)2005,JPO&NCIPI