Patent ID: 6739129
Filing Date: 2004-05-25
Classification: F04B,F15B

Abstract:
Electrohydraulic motor pump aggregate (G), comprising a housing in which an electromotor (M) drives at least one pump stage (P, P1, P3), an attachable element (C) provided between at least one pressure side port of the pump stage and the aggregate oil return line (13) and at least one consumer port (A, B, 5, 6), the attachable element (C) containing at least one pressure limiting valve (R2, R1) constructed as a seated valve located between the consumer port (A, B, 5, 6) and the return line (13), and a multiways control valve (3) between the consumer port and the pressure side port, characterised in that the motor pump aggregate (G) has a hydraulic automatic pressure releasing device (D) which is incorporated into said attachable element (C) and comprises at least one permanently open by-pass (16).