Patent ID: 7637285

Claim:
A hydraulic accumulator, comprising: a first plastic casing including a first end having a collar part with an opening; a valve coupled to said first plastic casing and controlling delivery and discharge of medium to and from inside said first plastic casing by moving between open and closed positions; a second plastic casing at least partially encompassing said first plastic casing, said casings extending along a longitudinal axis; a gap opening between said first and second plastic casings extending as far as a site where said casings are in contact and coaxial with one another; an outside support ring interposed between and supporting said collar part in said gap opening, said outside support ring tapering as a wedge and having an outside contour with a convex curvature in a direction of said gap opening and an opposite inside contour, said inside contour proceeding from said gap opening and extending in a straight slope ending at a site of entry of said collar part into a first contact surface parallel to said longitudinal axis; an inside support ring within said outside support ring and having a beveled stop and a second contact surface supporting said collar part on an inner peripheral side thereof; and an accumulator bladder within said first plastic casing having an open end held in a membrane holding device forming a passage for delivery of medium through a media supply valve, said membrane holding device pressing said open end of said bladder against said beveled stop of said inside support ring forming a common boundary wall with said membrane holding device.