Self-propelled vacuum cleaner

Details Self-propelled vacuum cleaner Self-propelled vacuum cleaner

1974-12-06

1976-06-15

Christian, Leonard D.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15413, A47L 922

Patent

active

039627462

ABSTRACT:
A vacuum cleaner construction wherein the carriage wheels are driven by an electric motor. An improved air flow arrangement is associated with the drive motor for conducting relatively clean cooling air into the motor for heat transfer therefrom, and conducting the cooling air from the motor for delivery with air conducted from a suction inlet to a suction fan.

REFERENCES:
patent: 3331090 (1967-07-01), Reiber et al.
patent: 3634905 (1972-01-01), Boyd
patent: 3854164 (1974-12-01), Schmitz

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