VACUUM PUMP

Organization Name

Milwaukee Electric Tool Corporation

Inventor(s)

Brandon W. Nowicki of Brookfield WI US

Sam L. Bertz of Fox Point WI US

Christopher J. Derksen of Hartland WI US

Parker R. Crowell of Wauwatosa WI US

VACUUM PUMP

This abstract first appeared for US patent application 18493115 titled 'VACUUM PUMP

Original Abstract Submitted

A vacuum pump that is connectable to an external system and configured to evacuate material from the external system. The vacuum pump including a motor operable in a first mode and a second mode that is slower than the first mode, a pump assembly driven by the motor and is lubricated and cooled by a lubricant, and a temperature sensor outputting a temperature signal corresponding to a temperature of the lubricant. The vacuum pump further includes an electronic control unit configured to receive the temperature signal from the temperature sensor, determine an electrical current value being drawn from the motor, operate the motor in the second mode when the temperature signal is below a temperature threshold, maintain the motor in the second mode while the electrical current value is above a current threshold, and operate the motor in the first mode only after the electrical current value remains below the current threshold for a preset time period.