Portless type master cylinder device with intake valve and flow resisting means between pressure chamber and reservoir chamber

Abstract From the Canadian patent

In this portless type master cylinder device a cylinder bore is formed, in a body thereof and a piston member is fitted in the cylinder bore and is slidably movable from an initial axial position therein and defines a pressure chamber on its one side and a reservoir chamber on its other side in cooperation with the cylinder bore. An intake valve communicates between the cylinder chamber and the reservoir chamber and is opened when the, piston member is in its initial axial position while it is closed when the piston member moves through more than a determinate relatively small axial distance from its initial axial position. Intermediately along the fluid flow path between the intake valve …