Cylinder tube strain measurement feedback for piston position control
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United States of America Patent
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-
Oct 20, 1987
Grant Date -
N/A
app pub date -
Sep 16, 1985
filing date -
Sep 17, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fluid cylinder control method for monitoring the position or controlling the movements of a piston which is slidably guided in a cylinder tube and is acted upon on at least one side by a pressure medium, in particular, maintaining the piston in a predetermined position against the action of eventual disturbance forces. This is attained in that the force which is transmitted between the piston and the cylinder by way of the parts which are slidingly guided on each other, and in particular the friction force acting by way of the seal gaskets of the piston and/or of the rod, is measured and the loading of the piston by a pressure medium is varied in the sense of reducing the measured force.
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