DEVICE FOR DETERMINING THE POSITION OF A PISTON IN A CYLINDER
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United States of America Patent
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Issued Date -
Nov 18, 2010
app pub date -
Jun 27, 2008
filing date -
Jul 27, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A device for determining the position of a piston in a cylinder comprises an ultrasound facility for transmitting ultrasound signals into the inside of the cylinder and for receiving ultrasound signals that are reflected from said piston. A projection is provided on a front surface of the piston and comprises a front surface that is offset by a certain height with respect to the remaining front surface of the piston. The projection is isolated in any piston position that can be reached during operation. The position of the piston is determined by an analytical facility based on the transit time of the ultrasound signals between the ultrasound facility and the front surface of the projection.
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