Patent ID: 6220288
Filing Date: 2001-04-24
Classification: F15B,Y10T

Abstract:
An electro-hydraulic control device for a hydraulic servo motor for controlling a volume flow, having a blocking valve arranged in a housing, whose movable seat valve body is inserted into a connection between a first motor chamber and a return flow chamber and in the process secures the motor chamber, and having a proportional magnet with an armature-actuated tappet for actuating the blocking valve, and having a longitudinally movable unblocking member, which is separated from the blocking valve and slidingly guided in the housing, which is inserted into the operational connection between the tappet of the proportional magnet and the blocking valve, characterized in that the seat valve body (23), the unblocking member (44) and the tappet (53) of the proportional magnet (16) are arranged coaxially in respect to each other, and the unblocking member is embodied as a longitudinal slide (45, 61) which, with one control edge (46), controls the connection between an inflow chamber (21) and a second motor chamber (19), wherein the latter is arranged in the slide bore (14) receiving the longitudinal slide (45, 61) next to the return flow chamber (18), and that the longitudinal slide (45, 61) essentially has the same exterior diameter as the seat valve body (23), and that upon actuation by the proportional magnet (16), both connections are opened or closed in the same direction.