초록 ▼

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 t

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.

대표청구항 ▼

A surface cleaning machine having a normally longitudinally forward direction of movement, said machine comprising a frame, a plurality of surface engaging wheels suitable for supporting said frame, a debris pickup housing supported by the frame, said housing having a downwardly facing opening and a

A surface cleaning machine having a normally longitudinally forward direction of movement, said machine comprising a frame, a plurality of surface engaging wheels suitable for supporting said frame, a debris pickup housing supported by the frame, said housing having a downwardly facing opening and a debris discharge opening, means for sweeping material from beneath said housing through the debris discharge opening, a hopper supported by the frame, said hopper having a debris inlet opening directly communicating with the housing discharge opening, said hopper having a portion remote from the debris inlet opening, a single blower for withdrawing air from said hopper remote portion and a filter chamber associated with said hopper, said single blower moving one portion of the air through said filter chamber and from thence to the ambient atmosphere and simultaneously moving a second portion of air into the hopper, thereby recirculating said second portion of air under pressure whereby at least a substantial quantity of said air moves again through said hopper to assist in propelling light weight debris in a direction toward said remote hopper portion thereby facilitating picking up debris and filling of said hopper with debris.