Tandem pump apparatus

Details Tandem pump apparatus Tandem pump apparatus

1996-08-27

1998-12-01

Thorpe, Timothy

Pumps

With condition responsive pumped fluid control

Plural pump units with individual or relative control

417310, 417428, F04B 4900

Patent

active

058428372

ABSTRACT:
A tandem pump apparatus is featured having a main suction passage connected to a fluid source. The main suction passage branches into first and second suction passages which, in turn, feed into first and second pumps. Each pump discharges a portion of the fluid to a return passage that is fluidly connected to the suction port of each respective pump. In each return passage, a return control valve is disposed to control the amount of fluid returned to the suction port. The tandem pump featured in this invention exhibits increased efficiency and decreased noise.

REFERENCES:
patent: 3924971 (1975-12-01), Jacquot
patent: 4913102 (1990-04-01), Ohmura et al.
patent: 5032065 (1991-07-01), Yamamuro et al.
patent: 5094597 (1992-03-01), Takai et al.
patent: 5199854 (1993-04-01), Aoyama
patent: 5713726 (1998-02-01), Nakayoshi

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