Patent ID: 6022198
Filing Date: 2000-02-08
Classification: F04B

Abstract:
Double pump unit having two hydraulic pumps (1, 2) having drive shafts (5, 6) arranged coaxially with one another, which shafts are coupled with one another in a force-locking manner by means of a coupling piece (23), in which connection piece suction channels (19, 20) for drawing in the pressure medium to be delivered through the hydraulic pumps (1, 2) are formed, wherein the connection piece (26) has an inlet pressure chamber (33) into which the suction channels (19, 20) open, and in that the coupling piece (23) has peripherally arranged blade elements (30, 31; 52-55) which rotate in the inlet pressure chamber (33) in order to feed the pressure medium into the suction channels (19, 20) under an initial pressure, the connection piece (26) is formed in two parts and, along with a main body (27) has a lid-like closure part (29) which is so formed that the coupling piece (23), with its blade elements (30, 31; 52-55). can be introduced into the main body (27) of the connection piece (26) through an opening (34) which can be closed by means of the closure piece (29).