Patent ID: 7204035
Filing Date: 2007-04-17
Classification: F15B,F16F

Abstract:
1. A displacement measuring system for a piston-cylinder assembly, the system comprising: a cylinder; a piston rod guided for movement axially within the cylinder; a first position measuring device which moves with the piston rod and is fixed against circumferential movement with respect to the cylinder; a second position measuring device fixed to the cylinder radially adjacent and axially parallel to the first position measuring device, the first and second positioning measuring devices being fixed against circumferential movement with respect to each other; a protective sleeve which surrounds the cylinder and moves with the piston rod, the first position measuring device being arranged inside the sleeve and moving with the sleeve; a spring which axially loads the first position measuring device against the sleeve; and a holder for the second position measuring device, the holder having a receiving channel in which the spring and the first position measuring device are received, the first position measuring device being axially moveable in the channel.