Patent ID: 6857450

Claim:
A hydropneumatic pressure reservoir, comprising: a housing having first and second housing shells with said first housing shell being connected to said second housing shell, and having an interior separated from an external environment, said housing having an inner wall and a cross-section defining a longitudinal axis; a partition dividing said interior into a gas chamber and a liquid chamber, said partition being a gas-tight diaphragm with a circumferential edge area clamped and sealed to said inner wall of said housing; first and second retaining surfaces seating said edge area therebetween, said first retaining surface being formed by a wall component of said first housing shell, said retaining surfaces being equidistant from one another over entire surface areas thereof and forming an annular gap with a constant gap width of an axial extent thereof, said first retaining surface being external relative to said longitudinal axis and being part of a conical surface with an apex on said longitudinal axis such that said first retaining surface is spaced by a greatest distance from said longitudinal axis at an end thereof facing said second housing shell; an elastic sealing element between and generating a clamping force on said edge area and one of said retaining surfaces; and a guide surface on an end area of said first housing shell between a free end thereof and said elastic sealing element, said guide surface flaring outwardly in a funnel form for moving said housing shells together.