| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piston seal structure capable of increasing resupply flow rate of each front side piston seal of primary and secondary pistons. <P>SOLUTION: A brake master cylinder 10 for a motor vehicle of a type which comprises a substantially axial body 12 in a bore 14 to which at least one axial piston is slidably mounted, and of a type in which the bore 14 comprises two seals, front seals 30, 34 and a rear seal interposed between the piston and the bore 14, the seals 30, 34 comprising three radially concentric lips accommodated in grooves 70, 72 in the bore 14, characterized in that the seals 30, 34 comprise central lips of reduced cross section. <P>COPYRIGHT: (C)2009,JPO&INPIT |
