Patent ID: 6805166
Filing Date: 2004-10-19
Classification: F15B,F16L

Abstract:
A bellows-type hydraulic accumulator comprising:a main shell forming a pressure space; a bellows unit which is disposed in the pressure space and whose first end is fixedly secured to a first end wall of the main shell, the bellows unit sectioning the pressure space into an outer chamber serving as a gas chamber in which pressurized gas is enclosed, and an inner chamber serving as a main liquid chamber; an auxiliary shell disposed in the main liquid chamber and fixed to the main shell, the auxiliary shell having an auxiliary liquid chamber formed therein and communicating with a liquid port formed in the first end wall of the main shell; and a movable wall member disposed inside the auxiliary shell in a liquid-tight and slidable manner and sectioning the auxiliary liquid chamber into a first interior portion communicating with the liquid port and a second interior portion communicating with the main liquid chamber via a communication passage formed in the auxiliary shell.