Surface maintenance machine having air recirculation

Details Surface maintenance machine having air recirculation Surface maintenance machine having air recirculation

1978-01-30

1980-06-10

Moore, Christopher K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15346, 15349, A47L 11202

Patent

active

042065305

ABSTRACT:
A powered sweeping machine is disclosed, particularly suitable for efficiently removing light and heavy weight litter from surfaces such as parking lots, warehouse floors and the like. The machine includes a main frame carrying a hopper and a powered brush. The brush operates through an opening in the lower side of a brush housing. The hopper is separated into a debris receiving compartment and a filter compartment. An air fan and an associated duct recirculates air from the far end of the debris compartment to a zone adjacent the brush. This nonfiltered air is discharged into the brush housing and again moved through the debris compartment to aid in moving debris to the far end of the debris compartment. A fan is provided for withdrawing a portion of the air from the filter compartment and discharging the air to the ambient atmosphere. The withdrawal of a portion of the air results in more air flowing into the brush housing than is recirculated through the brush housing and thus provides dust control at the base of the brush housing.

REFERENCES:
patent: 857415 (1907-06-01), Dum
patent: 1207816 (1916-12-01), Thompson
patent: 1459968 (1923-06-01), Bailly
patent: 4006511 (1977-02-01), Larsen

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