Hydropneumatic pressure storage device

A hydropneumatic pressure storage device comprising a housing means having two parts welded together by a welding seam, a retaining ring means arranged at the inner wall thereof within the area of the welding seam, a bellows means serving as a movable partition wall which is fastened at the retaining ring means, and a weld rejectable layer of a material for rejecting the welding material of said welding seam, said layer being disposed at least at a portion of said retaining ring means adjacent said welding seam, such that said retaining ring means is unbonded of said welding seam,

• wherein a first edge of the retaining ring means at least partially surrounds an edge of the bellows means provided with a bulge and forces the same against the inner walls of the housing means, and
• wherein a second edge of the retaining ring means at least partially surrounds a sealing ring and forces the same against inner walls of the housing means.

A hydropneumatic pressure storage device comprising a housing means having two parts welded together by a welding seam, a retaining ring means arranged at the inner wall thereof within the area of the welding seam, a bellows means serving as a movable partition wall which is fastened at the retaining ring means, and a weld rejectable layer of a material for rejecting the welding material of said welding seam, said layer being disposed at least at a portion of said retaining ring means adjacent said welding seam, such that said retaining ring means is unbonded of said welding seam.

• wherein a first edge of the retaining ring means at least partially surrounds an edge of the bellows means provided with a bulge and forces the same against the inner walls of the housing means, and
• wherein said inner wall of the housing means is provided with grooves for accommodating said bulge of the bellows means and a sealing ring.

A hydropneumatic pressure storage device comprising a housing means having two parts welded together by a welding seam, a retaining ring means arranged at the inner wall of said housing means within the area of the welding seam, means for fixing said retaining ring means in said housing means, a bellows means serving as a movable partition wall, said retaining ring means holding said bellows means in said housing means, and a weld rejectable layer of a material for rejecting the welding material of said welding seam, said layer being disposed at least at a portion of said retaining ring means adjacent said welding seam, such that said retaining ring means is unbonded of said welding seam, wherein said inner wall of the housing means is provided with grooves for accommodating a bulge of the bellows means and a sealing ring.