Patent ID: 7975725
Filing Date: 2011-07-12
Classification: F15B

Abstract:
1. A spring-loaded piston accumulator with a locking function, comprising: a pressure chamber which is closed on one side by an axially shiftable piston in order to change the volume of the pressure chamber depending on the axial position of the piston; a spring preload which urges the piston into a first position; a locking mechanism for retaining the piston in a second position different from the first position against the spring preload; an electromagnetic apparatus having an armature which is shifted upon axial shifting of the piston from the first into the second position in its turn into an axial position in which at least one blocking element of the locking mechanism is held by the armature in a radial position so as to block a shift of the piston back in the direction of its first position; and at least one separate interlocking member, which is fastened to the armature and made of a harder material than the armature, for holding the at least one blocking element in the radial position.