Patent ID: 8164882

Claim:
A capacitor comprising: a capacitor element including a positive electrode, a negative electrode facing the positive electrode, and a separator interposed between the positive electrode and the negative electrode; electrolyte impregnated in the capacitor element; a case with an opening, the case housing the capacitor element and the electrolyte; a terminal plate provided with a first hole, the terminal plate sealing the opening of the case; a gas permeable sheet closing the first hole so as to prevent permeation of the electrolyte; a valve body disposed facing the gas permeable sheet; a cap with an opening, the cap being fixed to the terminal plate around the opening of the cap and covering the valve body so as to retain the valve body in a compressed state with respect to the terminal plate, the cap being provided with a second hole; a ring-shaped first washer press-fitted into the opening of the cap, the first washer retaining the valve body in the compressed state with the cap; and a ring-shaped presser rubber disposed on the first hole; wherein the cap, the valve body, and the first washer configure a valve unit, and the presser rubber is retained in a compressed state by attaching the valve unit to the terminal plate.