Fluid pump having pressure pulsation reducing passage

Details Fluid pump having pressure pulsation reducing passage Fluid pump having pressure pulsation reducing passage

1999-01-25

2000-07-04

Denion, Thomas

Rotary expansible chamber devices

Moving cylinder

Rotating

418181, 418166, 418 15, 417312, 4174104, 415 551, F01C 110

Patent

active

060829842

ABSTRACT:
A fuel pump comprises a pump unit and a motor unit. The pump unit is a trochoid gear type having rotors in a pump chamber defined by a pair of side plates and a cylindrical housing. A disk plate is attached to the side plate to provide an arcuate-shaped pressure pulsation reducing passage jointly with the side plate. Protrusions or recesses are provided in the passage to cause turbulence in fuel flowing through the passage. This turbulence scatters pressure pulsation in the fuel thereby to reduce the pressure pulsation.

REFERENCES:
patent: 5263818 (1993-11-01), Ito et al.
patent: 5340293 (1994-08-01), Yasuda
patent: 5586858 (1996-12-01), Tuckey
patent: 5997262 (1999-12-01), Finkbeiner et al.

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