Free-flow-pump

Details Free-flow-pump Free-flow-pump

F - Mech Eng,Light,Heat,Weapons

04

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103/115

F04D 1/00 (2006.01) F04D 7/04 (2006.01) F04D 29/22 (2006.01)

Patent

CA 1215581

FREE-FLOW-PUMP ABSTRACT OF THE DISCLOSURE The free-flow pump has an impeller chamber (9, 10) laterally of its free flow chamber (4), and the impeller (6) is located in the impeller chamber (9, 10). The ex- ternal, radial limiting member (10) of the impeller cham- ber is drawn forwardly into the free flow chamber so as to decrease in the direction of rotation from the housing tongue (11) to the pressure pipe outlet. The limiting member (10) causes a constriction in the external portion (4') of the flow chamber, and such construction decreases from the housing tongue towards the pressure pipe outlet. These measures permit the pump characteristics to be im- proved, and in particular the throttle characteristic of the free-flow pump can be stabilised.

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