Fuel pump

Details Fuel pump Fuel pump

2006-06-20

2006-06-20

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

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

Turbine regenerative pump

C415S055500, C415S225000, C415S226000

Reexamination Certificate

active

07063502

ABSTRACT:
A fuel pump prevents pressurized fuel from being pulled into a clearance between an outer circumference face of an impeller and an inner circumference face of a pump case, thereby allowing the delivery of the pressurized fuel from a pump body side to a pump cover side through through-holes of the impeller.Since a clearance C2between an impeller outer circumference face16pand a pump cover inner circumference face39cis made extremely small, the pressurized fuel is caused to pass via through-holes16cthat communicate between an upper and an lower side of an impeller16. By this means, it is difficult for the pressurized fuel to enter the clearance C2, and it is possible to prevent the decrease in pump efficiency caused by pressure at the impeller outer circumference face16pand the vicinity thereof.

REFERENCES:
patent: 4478550 (1984-10-01), Watanabe et al.
patent: 1 158 172 (2001-11-01), None
patent: 1 447 554 (2004-08-01), None
patent: 01-177492 (1989-07-01), None
patent: WO 990707990 (1992-02-01), None
U.S. Appl. No. 10/851,732, unpublished, Masaki Ikeya.

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