Patent ID: 6098653
Filing Date: 2000-08-08
Classification: F15B,F16K,Y10T

Abstract:
An electrohydraulic control unit for a hydraulic self-advancing support with a 3/2 directional control valve connectable to a high-pressure line and with an electromagnet connectable to an intrinsically safe power supply to operate a stopper which in the closing position is held on a sealed seat by a valve spring and by the hydraulic fluid and is shiftable to the opening position by a control plunger of the electromagnet, a spring buffer with a pressure element which is subjected to initial pressure by spring force being interposed between the control plunger and the stopper, the 3/2 directional control valve and the spring buffer being integrated in a valve cartridge inserted into the valve casing on a common axis and with adjustable clearance with respect to the electromagnet.