Friction regenerative pump

Details Friction regenerative pump Friction regenerative pump

2005-03-08

2005-03-08

Lopez, F. Daniel (Department: 3745)

Rotary kinetic fluid motors or pumps

With means for re-entry of working fluid to blade set

Turbine regenerative pump

C415S172100

Reexamination Certificate

active

06863492

ABSTRACT:
A friction regenerative pump of this invention comprises: a partition portion formed in a section from a high-pressure outlet to a low-pressure intake along an impeller rotation direction; and a tongue portion provided in the partition portion such that it is elastically deformable. The tongue portion receives a back pressure from high-pressure fluid on the side of the high-pressure outlet and is elastically deformed in a direction of reducing a gap formed between the tongue portion and the outer peripheral portion of an impeller. Consequently, leakage of the high-pressure fluid from the high-pressure outlet to the low-pressure intake is reduced, thereby improving pump efficiency.

REFERENCES:
patent: 2455552 (1948-12-01), Bower
patent: 3259072 (1966-07-01), Carpenter
patent: 4325672 (1982-04-01), Sixsmith et al.
patent: 4412781 (1983-11-01), Abe et al.
patent: 4749338 (1988-06-01), Galtz
patent: 5143511 (1992-09-01), Verneau et al.
patent: 5498124 (1996-03-01), Ito et al.
patent: 5527150 (1996-06-01), Windhofer
patent: 02009990 (1990-01-01), None
German Office Action.

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