Vacuum cleaner and method of determining type of floor surface b

Details Vacuum cleaner and method of determining type of floor surface b Vacuum cleaner and method of determining type of floor surface b

1990-08-14

1992-09-08

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15339, 15412, A47L 500

Patent

active

051447150

ABSTRACT:
A vacuum cleaner and method for determining the kind of floor surface being cleaned by a vacuum cleaner wherein dust amount per unit interval is detected and dust detection change patterns are analyzed for determining floor type. This analysis is based on the following assumptions: smooth and carpet surfaces can be distinguished by dust detection patterns for an interval of several seconds. On the smooth surface, almost all of the dust at one place is picked up during an early stage of the interval. On the other hand, on a carpet floor, dust is picked up continuously. On a new carpet, many piles detach during vacuuming. Thus, if dust detection is continuous over several seconds it may be assumed that, the carpet is a new carpet.

REFERENCES:
patent: 4601082 (1986-07-01), Kurz
patent: 4680827 (1987-07-01), Hummel
patent: 4920605 (1990-05-01), Takashima
patent: 4942640 (1990-07-01), Hayashi et al.
patent: 4958406 (1990-09-01), Toyoshima et al.

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