Vacuum cleaner

Details Vacuum cleaner Vacuum cleaner

1991-04-18

1994-11-22

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15412, 55276, 417312, A47L 900

Patent

active

053656334

ABSTRACT:
A vacuum cleaner including an electric blower disposed inside a generally cylindrical rigid blower casing positioned inside the vacuum cleaner body. The blower casing has a lining of sound absorbing material and is configured to cause a swirling flow around inside the casing to an exit opening into a smoothly-curved transfer passage which curves away from the blower casing with a non-radial flow direction. The transfer passage curves circumferentially and axially and opens into an annular noise reduction space at the bottom of the cleaner body in which air is guided over a sound absorbing layer by smoothly arcuate guide ribs, vented through an aperture into an exhaust space between the bottom of the body and a caster base and escapes through a peripheral clearance around the caster base.

REFERENCES:
patent: 3874023 (1975-04-01), Tschudy
patent: 4330899 (1982-05-01), Miller et al.
patent: 4435877 (1984-03-01), Berfield
patent: 4665581 (1987-05-01), Oberdorfer

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