Patent ID: 6637201
Filing Date: 2003-10-28
Classification: B60T

Abstract:
A master cylinder comprising:a cylinder body; a piston disposed slidably in a cylinder bore formed in said cylinder body; a pressure delivering chamber defined by said piston and said cylinder body; a fluid passage connecting said pressure delivering chamber to a reservoir for resupplying a working fluid to said pressure delivering chamber; an output port connecting said pressure delivery chamber and said fluid passage for discharging a working fluid pressurized at the operation time of said piston from said pressure delivery chamber; and a throttle valve mechanism disposed in said fluid passage and having a throttle function of throttling the flow of a working fluid from said pressure delivering chamber to said reservoir at the operation time of said piston, a valve function of allowing the working fluid to flow from said reservoir to said pressure delivering chamber by opening the valve at the return time of said piston, and a relief valve function of allowing the working fluid to flow from said pressure delivering chamber to said reservoir.