Method and apparatus for preventing the no-load operation of a p

Details Method and apparatus for preventing the no-load operation of a p Method and apparatus for preventing the no-load operation of a p

1989-11-29

1991-06-04

Smith, Leonard E.

Pumps

Condition responsive control of pump drive motor

Responsive to accumulation of pumped liquid in receiver

417 12, 417 44, 417 53, 417 63, 141 83, F04B 4902

Patent

active

050209728

ABSTRACT:
An apparatus and method for preventing the no-load operation of a pump for a liquid supply system which responds to a sensor signal indicating that insufficient liquid in the supply exists for properly supplying liquid from a supply tank to a reservoir tank is described. The device provides a user indication that the supply tank liquid needs replenishment. Further, the device also detects when the pump supplying liquid from the supply tank to the reservoir tank operates for a period of time longer than a predetermined period of time. The device also provides a user with an indication that such a condition exists.

REFERENCES:
patent: 4456432 (1984-06-01), Mannino
patent: 4507054 (1985-03-01), Schoenmeyr
patent: 4753277 (1988-06-01), Holcomb et al.
patent: 4856563 (1989-08-01), Yamaguchi et al.

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