Vacuum cleaner and control method thereof

Details Vacuum cleaner and control method thereof Vacuum cleaner and control method thereof

1996-04-17

1998-11-24

Mansen, Michael

Electricity: motive power systems

Positional servo systems

Vehicular guidance systems with single axis control

15323, 153401, 180169, 191 122A, 242374, 2423908, 2424223, 318283, 318286, B64C 1318, A47L 900, B65H 7548, H02G 1100

Patent

active

058412590

ABSTRACT:
A vacuum cleaner is selectively operable in one of three modes, namely: an automatic self-directing mode, a remotely controlled mode, or a manual mode. The vacuum carries ultrasonic object detectors for detecting walls of a room being cleaned, as well as obstacles in the room. When in a self-directing mode, the vacuum selects a path of travel based upon a detected wall of the room as a reference, and steers itself to avoid obstacles in its path. An electric cord is automatically payed-out and retracted as the vacuum travels. A constant tension is imposed on the cord as it is payed-out or retracted by an appropriate manipulation of a spiral spring connected to the cord.

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