Patent ID: 7090310
Filing Date: 2006-08-15
Classification: B60T,Y10S

Abstract:
1. A brake device comprising: at least one wheel cylinder operable by a pressure of a working liquid; a reservoir arranged and constructed to store the working liquid discharged from the at least one wheel cylinder; a pump arranged and constructed to transfer the working liquid from the reservoir; an outlet valve disposed on a discharge side of the pump; a master cylinder arranged and constructed to receive the working liquid delivered from the pump via the outlet valve; a pulsation reducing device disposed on a downstream side of the outlet valve between the pump and the master cylinder, wherein the pulsation reducing device is arranged and constructed to control an operation speed of the outlet valve in order to reduce possible pulsations produced in the working liquid discharged from the pump; wherein the pulsation reducing device comprises: a plunger disposed on the downstream side of the outlet valve and is arranged and constructed to move in response to movement of the outlet valve; a support member; a support hole defined within the support member in order to movable receive the plunger; a liquid control chamber defined within the support hole on a side of the plunger opposite to a side of the plunger opposing the outlet valve; a communication device arranged and constructed to provide communication between the liquid control chamber and outside of the support member; and a flow control device arranged and constructed to alter the flow rate of the working liquid flowing between the liquid control chamber and the outside of the support member via the communication device so as to control the moving speed of the plunger.