Patent ID: 7448858

Claim:
Pump aggregate (A), comprising a one-piece cast hollow body ( 1 ) having a stator holding collar ( 15 ) formed into a lateral wall ( 16 ) of a bearing shield integrated into the inner wall, a wet-pit electric motor secured with its stator ( 24 ) in the holding collar ( 15 ), at least one pump element ( 33 , 22 ) which is attached to the lateral wall ( 16 ) of the bearing shield, a pump element discharge side communicating via a pressure transmission path with a connection block ( 3 ) provided in the wall ( 12 ) of the cast hollow body ( 1 ), and cover lids ( 8 , 9 ) for defining an oil reservoir in combination with the cast hollow body ( 1 ), the cover lids ( 8 , 9 ) being attached at circular sealing surfaces ( 13 ) at the ends of the cast hollow body ( 1 ), characterized in that in the cast hollow body ( 1 ) has at least one pressure transmission path, at least one channel (K) is formed by casting in the lateral wall ( 16 ) of the bearing shield, and that the channel (K) extends from the connection block ( 3 ) into a mounting surface ( 18 , 18 ′, 18 ″) of the lateral wall ( 16 ) of the bearing shield, which mounting surface ( 18 , 18 ′, 18 ″) is machined for selectively securing either at least a radial piston pump element ( 33 ) and/or a gear wheel type pump element ( 22 ), said stator ( 24 ) carries a bearing shield ( 23 ) at the end remote from the lateral wall ( 16 ) of the bearing shield, that the bearing shield ( 25 ) is screwed to the holding collar ( 15 ), that the bearing shield ( 25 ) is secured by tensioning screws ( 26 ) of different lengths for different installation lengths of the wet-pit electric motor, and that the respective bearing shield ( 25 ) is of identical construction for different installation lengths of the wet-pit electric motor.