Hydraulic cylinder having a stroke-movement measuring device

摘要

A stroke-movement measuring device, which operates independently of the influence of the high pressure in the hydraulic cylinder, consists of a plunger-type piston which is assigned to the piston rod, can be rotated by means of the rotational movement of the said piston rod, and is connected to a rotary potentiometer which is used as a movement measurement transmitter. In consequence, the stroke-movement measuring device disclosed in the main application P 3225342.7-24 is improved, the rotational movement being forced by means of a longitudinal groove which is provided on the piston of the plunger-type piston and runs in the longitudinal direction. <IMAGE>