Abstract: A pumping apparatus has a linear electric motor (10; 40) reciprocally driving motor pistons (16; 45) hydraulically coupled with pump pistons (25) or with coupling pistons (51) mechanically connected with pump pistons (61) which move the fluid to be pumped. For undersea use, the coupling arrangements allow convenient separation and retrieval of subassemblies requiring relatively frequent servicing.

Abstract: An electrohydraulic device, particularly an electric fuel pump for motor vehicle comprises a housing, a hydraulic connecting pipe and at least one electrical connecting plug for hydraulic medium and current supply respectively, a hydraulic conduit and a current cable extending to the housing, and a plug head. The hydraulic conduit and the current cable are connected with the plug head. The plug head is fitted over the connecting pipe and the connecting plug so as to establish hydraulic and electrical connection between the hydraulic conduit and the connecting pipe on the one hand and the current cable and the connecting pipe on the other hand.