Spring-loaded piston accumulator with locking function
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United States of America Patent
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Jul 12, 2011
Grant Date -
Dec 3, 2009
app pub date -
May 28, 2009
filing date -
May 30, 2008
priority date (Note) -
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Abstract
A piston accumulator (10) comprises a pressure chamber (40) which is closed on one side by an axially shiftable piston (50) in order to change its volume depending on the axial position of the piston (50). A locking mechanism is provided for retaining the piston (50) in a second position different from a first position against a spring preload (190). The piston accumulator (10) further comprises an electromagnetic apparatus (80) having an armature (150) which is shifted upon axial shifting of the piston (50) from the first into the second position in its turn into an axial position in which a blocking element (175) of the locking mechanism is held by the armature (150) in a radial position so as to block a shift of the piston (50) back in the direction of its first position. For holding the blocking element (175) there is provided a separate interlocking member (170) which is fastened to the armature (150) and is made of a harder material than the armature (150).
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