Apparatus for preventing bumping and falling of automatic travel

Details Apparatus for preventing bumping and falling of automatic travel Apparatus for preventing bumping and falling of automatic travel

1993-09-08

1995-08-29

Scherbel, David A.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15325, 153403, A47L 1110

Patent

active

054448930

ABSTRACT:
An apparatus for and a method of preventing bumping and falling of an automatic travelling cleaner wherein a situation of the cleaner is determined by sensing a variation of flow rate of a fluid in an extension pipe depending on a gap between an intake port and a surface to be cleaned, thereby deriving a suction work ratio or sensing revolutions and a current value of a cleaning motor or a torque value of each travel motor, and then determining a travel, a bumping, and a step sensing, based on the sensed value. The present invention eliminates the provision of a plurality of sensors densely arranged around a cleaner and adapted to sense bumping and falling of the cleaner and thus eliminates the requirement of additional devices for the sensors. This reduces the manufacture costs.

REFERENCES:
patent: 2324111 (1943-07-01), Ross
patent: 3952361 (1976-04-01), Wilkins
patent: 4503581 (1985-03-01), Early
patent: 4518437 (1985-05-01), Sommer
patent: 4953253 (1990-09-01), Fukuda
patent: 5086535 (1992-02-01), Grossmeyer

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