Vacuum cleaner with agitator

Details Vacuum cleaner with agitator Vacuum cleaner with agitator

1985-01-30

1987-01-20

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15390, 318461, 361 23, A47L 928

Patent

active

046370927

ABSTRACT:
In a vacuum cleaner of the type arranged to stop a motor when a driven brush is overloaded due to engagement with carpet or other obstacles, a starter circuit responsive to a manually operable power switch is employed to start the motor. The rotation of the rotary brush is detected by way of a sensor which produces a voltage. The starter circuit produces another voltage for a given period of time after the power switch is turned on, and these voltages are fed to a latching circuit which produces a control voltage when neither of the first nor second voltage is applied thereto, and the control voltage causes a control unit to interrupt power to the electric motor. As a result, once the latching circuit is put in a latching state after the brush has stopped, the motor is prevented from starting again unless the power switch is turned on again.

REFERENCES:
patent: 4245370 (1981-01-01), Baker
patent: 4328522 (1982-05-01), Tryan
patent: 4446595 (1984-05-01), Nakada et al.

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