Patent ID: 8176940

Claim:
A pressure accumulator, comprising: an accumulator housing formed by a circularly cylindrical tubular body extending along a longitudinal axis and having an inlet opening and an outlet opening at opposite longitudinal ends of said housing allowing fluid flow through said accumulator housing in an axial direction along said longitudinal axis; a gas chamber in said accumulator housing; a fluid chamber in said accumulator housing; a cover terminating one end of said gas chamber and fixed on an inside surface of said tubular body by a support structure, said support structure including a cover retaining ring fixed on said inside surface of said tubular body and attachment rods connecting and extending between a side edge of said cover and said cover retaining ring; a piston part movably mounted in said accumulator housing along said longitudinal axis and terminating another end of said gas chamber; and a bellows separating element separating said gas chamber and said fluid chamber gas and fluid tight and concentrically positioned in said accumulator housing to form an annulus between said inside surface of said tubular body and an outside surface of said separating element through which fluid can flow from said inlet opening to said outlet opening, said support structure minimizing throttling of fluid flow between said annulus and said outlet opening, said separating element connected at one end to said cover and at an opposite end thereof to said piston part, working movements of said piston part causing volume changes in said gas chamber and said fluid chamber bordering said separating element.