Patent ID: 6035636
Filing Date: 2000-03-14
Classification: B60T

Abstract:
A master cylinder comprising:a cylinder body having an outer circumferential surface and a boss on said outer circumferential surface, said boss having an inner circumferential surface;a reservoir having a bottom portion and a supply fitting on said bottom portion, said supply fitting having an outer circumferential surface and being adapted to be connected to said boss of said cylinder body; anda grommet seal including a cylindrical portion and a flange portion, said cylindrical portion being capable of sealing between said inner circumferential surface of said boss and said outer circumferential surface of said supply fitting, said cylindrical portion including:A) an inner circumferential surface and an outer circumferential surface;B) at least two outer sealing projections on said outer circumferential surface of said cylindrical portion, said at least two outer sealing projections extending in a circumferential direction of said cylindrical portion;C) at least one inner sealing projection on said inner circumferential surface of said cylindrical portion, said at least one inner sealing projection being located between said at least two outer sealing projections with respect to an anal direction of said cylindrical portion, said at least one inner sealing projection extending in a circumferential direction of said cylindrical portion; andD) an abutting portion located above said at least one inner sealing projection;wherein said supply fitting includes a positioning stepped portion on said outer circumferential surface thereof for restricting upward axial movement of said grommet seal, said abutting portion of said grommet seal abutting against said positioning stepped portion.