Cylinder with an elastic device for returning a working piston unit to a neutral position
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United States of America Patent
Stats
-
Sep 4, 2001
Grant Date -
N/A
app pub date -
Oct 19, 1999
filing date -
Oct 28, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This cylinder, which may be entirely pneumatic, has two working pistons 26 and 27 linked to a working rod 28, slidably mounted on which are two small auxiliary pistons 37 and 38 which can be displaced in an auxiliary chamber 35. The latter, being permanently supplied with a compressed gas, can cause the return, by means of the piston 38 or 37, of the fitting 26-27-28 to an intermediate position shown in the drawing, respectively from a fully extracted position (towards the right) of the rod 28 or a fully retracted position (to the left) of this rod.
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