Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1986-12-19
1987-12-29
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15377, 174 47, 361212, 361220, A47L 928
Patent
active
047150858
ABSTRACT:
A vacuum cleaner includes a motor and an elongate conductive tubular member and a system for dissipating an electrostatic charge accumulated on the tubular member. In a canister vacuum cleaner, a rigid wand, mechanically and pneumatically interconnected between a wand handle and a floor cleaning unit, is electrically conductively connected to a motor in the floor cleaning unit to dissipate or drain off any electrostatic charge accumulated on the rigid wand. Furthermore, one or more corona discharge elements are disposed in the wand handle and are electrically conductively connected to the rigid wand to effect a corona discharge into the air flowing through the vacuum cleaner, thereby to dissipate the electrostatic charge accumulated on the rigid wand. In an upright vacuum cleaner, an elongate conductive tubular handle is electrically conductively connected to the motor of the upright vacuum cleaner, thereby to dissipate or drain off an electrostatic charge accumulated on the handle. In either the canister vacuum cleaner or the upright vacuum cleaner, a current limiting resistor is electrically connected in series between the motor and the elongate conductive tubular member to prevent an unpleasant shock or harm to an operator of the vacuum cleaner.
REFERENCES:
patent: 1920889 (1933-08-01), Pullen
patent: 3780345 (1973-12-01), Earman
patent: 4194081 (1980-03-01), Medford
patent: 4215384 (1980-07-01), Elson
patent: 4345297 (1982-08-01), Check
Moore Chris K.
Whirlpool Corporation
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