Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1991-09-11
1993-06-22
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15339, A47L 928
Patent
active
RE0342866
ABSTRACT:
In a vacuum cleaner comprising an electric blower and a speed control unit to operate the electric blower at a variable speed, a plurality of kinds of operation control rules of the electric blower are previously stored in the speed control unit, a load current value of the electric blower is continuously detected during the cleaning and the type of the surface to be cleaned is estimated from the load current value. Thereafter, the operation control rule suitable for the estimated cleaning surface is selected from the operation control rules stored in the speed control unit and the electric blower is driven on the basis of the selected operation control rule.
REFERENCES:
patent: 4399585 (1985-08-01), Kullik et al.
patent: 4654924 (1987-04-01), Getz et al.
patent: 4817234 (1989-04-01), Greulich
Endo Tunehiro
Hishi Wakichiro
Ishii Yoshitaro
Jyoraku Fumio
Koharagi Haruo
Hitachi , Ltd.
Moore Chris K.
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