Cleaning and liquid contact with solids – Processes – Including use of vacuum – suction – or inert atmosphere
Patent
1987-10-08
1989-11-14
Pal, Asok
Cleaning and liquid contact with solids
Processes
Including use of vacuum, suction, or inert atmosphere
134 18, B08B 700, B08B 704
Patent
active
048804746
ABSTRACT:
Method and apparatus for operating a vacuum cleaner in which by detecting a rotational speed of a variable speed fan motor adapted to give a suction force to the cleaner and its change range, the choking state of the filter and the state of the cleaned surface are discriminated, and a speed command of the fan motor is corrected on the basis of the result of the discrimination, and the comfortable cleaning can be performed by the optimum suction force.
REFERENCES:
patent: 4337429 (1982-06-01), Stuart
patent: 4479078 (1984-10-01), Kidd et al.
patent: 4489267 (1984-12-01), Saar et al.
patent: 4601082 (1986-07-01), Kurz
Endo Tsunehiro
Hishi Wakichiro
Ishii Yoshitaro
Jyoraku Fumio
Koharagi Haruo
Hitachi , Ltd.
Pal Asok
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