Patent ID: 7591284

Claim:
A hydraulic accumulator, comprising: an accumulator housing having first and second working chambers therein and having first and second longitudinal ends with first and second free longitudinal edges, respectively, said first longitudinal end having a reduced wall thickness relative to a main body portion of said housing between said longitudinal ends forming first articulation and a first stop between different wall thicknesses of said first longitudinal end and said main body portion; a separator piston movably mounted in said housing and separating said first chamber from said second chamber; first and second cover parts having inner and outer sides, said first cover part having a conical first fixing bevel on said outer side thereof, said first longitudinal end being bent at said first articulation into a first conical shape over and engaging said first fixing bevel of said first cover part with said first cover part engaging said first stop to fix said first cover part in said housing and to form a fluid-tight sealing of said first working chamber adjacent thereto; and a first peripheral weld connecting said first cover part to said first free longitudinal edge; whereby, engagement of said first cover part with said conical shape of said first longitudinal end and with said stop forms a clamp seat fixing said first cover part in said housing.