Ripple-effect removing valve for use with a pressure detecting d

Details Ripple-effect removing valve for use with a pressure detecting d Ripple-effect removing valve for use with a pressure detecting d

1997-09-29

1999-10-05

Thorpe, Timothy S.

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

417 449, F04B 4906

Patent

active

059612924

ABSTRACT:
A control assembly for a pump includes a ripple-effect removing valve and a pressure detecting device. The ripple-effect removing valve includes a casing having a lower inlet end in fluid communication with a hollow body of the pump, an upper outlet end and an interior fluid passage which fluidly communicates the inlet and outlet ends and which includes a generally upright lower section with a top opening, a generally upright upper section with a bottom opening, and a substantially horizontal intermediate section fluidly communicating the upper and lower sections. The valve further includes a regulator for controlling fluid flow from the lower section to the upper section. The pressure detecting device is fluidly communicated with the upper outlet end of the casing, and deactivates an impeller unit of the pump when the pressure of the fluid entering the pressure detecting device via the fluid passage of the casing reaches a predetermined value.

REFERENCES:
patent: 3119551 (1964-01-01), Beeman
patent: 3166292 (1965-01-01), Forman
patent: 3283094 (1966-11-01), Lung
patent: 4568499 (1986-02-01), Wood
patent: 5002705 (1991-03-01), Kohler
patent: 5441673 (1995-08-01), Gerhardy
patent: 5772927 (1998-06-01), Koizumi et al.

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