Patent ID: 6918472

Claim:
An arrangement for a piston and cylinder device, comprising: a cylinder unit having an inner space defined therein; a slidable piston unit disposed in the inner space, the piston unit being movable in a forward and backward direction, the piston unit dividing the inner space into a first chamber and a second chamber; a piston rod connected to the piston unit and having a recess defined therein; the cylinder unit having a first closed end wall at the first chamber and a second end wall at the second chamber, the second end wall having a first cylinder channel defined therein, the cylinder unit having a second cylinder channel and a third cylinder channel defined therein; a hollow sensor element disposed in the inner space, the sensor element having an axial sensor channel defined therein, the piston unit being slidably associated with the sensor element and the sensor element extending into the recess of the piston rod; the first cylinder channel in fluid communication with the second chamber, the sensor channel in fluid communication with the second cylinder channel, the third cylinder channel in fluid communication with the first chamber; and a conductive member disposed in the sensor element, the conductive member being connected to an electric unit for detecting an inductance.