Patent ID: 8646268
Filing Date: 2014-02-11
Classification: B60T

Abstract:
1. A master cylinder for a vehicle, comprising: a housing comprising a liquid pressure chamber configured to contain oil; a piston movably contained in the liquid pressure chamber, the piston configured to reciprocate in the liquid pressure chamber to control pressure in the liquid pressure chamber, the piston comprising a front end comprising a stepped circumferential outer surface; a plurality of inlet ports disposed in the housing and configured to supply the oil into the liquid pressure chamber; and a seal seated into a seating depression, the seating depression being formed in an inner surface of the housing at a position spaced apart from the inlet ports by a distance, the seal configured to control opening of a flow path of the oil depending on whether the seal is brought into contact with a front end of the piston, wherein the oil flows into the liquid pressure chamber along the stepped circumferential outer surface of the piston through a space defined between the piston and the seal.