Water pump protector

Details Water pump protector Water pump protector

1981-12-03

1983-12-13

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 85, 318455, 417 45, H02H 326

Patent

active

044207875

ABSTRACT:
A water pump protector which includes electrical circuitry through which an electric motor is energized. The electric motor operates a water pump. The circuitry senses the phase angle between the voltage and the current applied to the electric motor. When the phase angle indicates that the motor is operating without a load, the circuitry deenergizes the electric motor. Thus, the water pump is protected against damage which may occur when the water pump is operated without pumping water.

REFERENCES:
patent: 2953722 (1960-09-01), Willis
patent: 3417290 (1968-12-01), Craddock
patent: 3519910 (1970-07-01), Pfaff et al.
patent: 3600657 (1971-08-01), Pfaff
patent: 3931559 (1976-01-01), McKee
patent: 3953777 (1976-04-01), McKee
patent: 4117408 (1978-09-01), Comstedt
patent: 4286925 (1981-09-01), Standish
patent: 4290007 (1981-09-01), Fisher et al.

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