Abstract: A pump aggregate A comprises a one-piece cast hollow body 1 including an exterior connection block 3 and an interior lateral wall 16 of a bearing shield. A pressure transmission path is formed by a channel K which is made by casting in the lateral wall 16 of the bearing shield and which extends from the connection block 3 into a pump element mounting surface 18, 18?, 18? of the lateral wall 16 of the bearing shield.

Abstract: An electromotor M of a electrohydraulic motor pump aggregate G drives at least one pump stage P, P1, P3. An attached element C is inserted between at least one pressure side port of the pump stage, a return line 13, and at least one consumer port A, B, 5, 6. A multiways control valve 3 is installed between the consumer port and the pressure side port. A pressure limiting valve R1, R2 constructed as a seated valve is installed between the consumer port A, B, 5, 6 and the return line 13. The motor pump aggregate G has an automatic hydraulic pressure relieving device D for relieving the system pressure whenever the electromotor M is switched off.

Abstract: In a hydraulic pump (P) comprising at least one piston pump element whose ston (11) is oriented towards an eccentric (E) of a drive shaft (2), and being equipped between the eccentric (E) and a bearing ring (R) rotatable on the eccentric (E) with an eccentric slide bearing (G) having a bearing bush (B) fixed in the bearing ring (R), the bearing bush (B) and the bearing ring (R) each have molded and locally meshing stop portions (A1, A2) which positively fix the bearing bush (B) in the bearing ring (R) in rotational and axial direction. (FIG. 1).