Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1992-08-14
1994-06-14
Coe, Philip R.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15339, 250574, 356438, A47L 928
Patent
active
053198271
ABSTRACT:
A device for sensing the amount of dust, refuse, etc., flowing into a dust suction tubular member of a vacuum cleaner. The device comprises a light emitting element and photoreceptor, the light emitting element and photoreceptor facing each other with a dust path between them provided in the inside of the dust suction tubular member, a detector for detecting the amount of the light supplied from the light emitting element and photoreceptor from being flush with the inside of the dust suction tubular member, a ring-shaped projection formed in the inside of the dust suction tubular member for increasing the inflow speed of the air including dust, refuse, etc., through the space between the light emitting element and photoreceptor.
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Alexander Reginald L.
Coe Philip R.
Gold Star Co. Ltd.
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