Dishwasher pump

Details Dishwasher pump Dishwasher pump

1990-11-14

1992-09-01

Look, Edward K.

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

415144, 4151522, 4151531, 416181, 416182, 416223B, 416231R, 134176, 134179, F01D 512

Patent

active

051435136

ABSTRACT:
The present invention is directed to a two chamber dishwasher pump wherein the pumping noise associated with recirculation is substantially lowered by reducing the intake area to the recirculation impeller thereby interrupting air pockets formed in the fluid while recirculating. In addition the noise associated with fluid drainage is minimized by an aperture between the drain chamber inlet and the drain outlet which allows fluid to flow from the inlet to the outlet thereby interrupting air pockets in the drain line which create the noise. In addition, fluid flows through the aperture in an opposite direction to that described above in order to relieve excessive pressure in the drain line during recirculation.

REFERENCES:
patent: 1524320 (1925-01-01), Sparks
patent: 2400434 (1946-05-01), Nelson
patent: 3294102 (1966-12-01), Ruspino et al.
patent: 3324796 (1967-06-01), LaFlame
patent: 3353553 (1967-11-01), Lind et al.
patent: 3648931 (1972-03-01), Jacobs
patent: 4350306 (1982-09-01), Dingler et al.
patent: 4355954 (1982-10-01), Wilson
patent: 4448359 (1984-05-01), Meyers
patent: 4753570 (1988-06-01), Jarvis
patent: 4795102 (1989-01-01), Jordan et al.
patent: 4964783 (1990-10-01), Haverkamp

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