Patent ID: 8342303

Claim:
A valve apparatus comprising: a valve body having an opening and a hydraulic fluid passage spaced apart from the opening; at least one valve member comprising an annular disk that selectively opens and closes the hydraulic fluid passage, the valve member being provided at one end of the valve body; a pin extending through the valve body and the valve member, a distal end portion of the pin being inserted into the opening of the valve body from an opposite end of the valve body; a staked portion formed by staking the distal end portion of the pin so as to clamp an inner peripheral portion of the valve member to the valve body; and at least one ring-shaped restraining member provided between the valve member and the staked portion, the pin extending through the restraining member, the restraining member being adapted to prevent enlargement of a diameter of the pin due to the staking of the distal end of the pin, wherein the inner peripheral portion of the valve member and an inner peripheral portion of the restraining member directly face an outer peripheral portion of the pin, wherein an inner diameter of the restraining member is smaller than an inner diameter of the valve member, and wherein the inner peripheral portion of the valve member is clamped between a clamp portion of the valve body and the restraining member, and an outer peripheral portion of the valve member is arranged to open and close the hydraulic fluid passage of the valve body.