Sweeper with recirculation hood and independent filter system
Air cleaner having a dust dumping valve
Pickup truck mounted sweeper Patent #: 4660248
ApplicationNo. 093005 filed on 09/04/1987
US Classes:15/340.1, Power propelled vehicle or carrier15/346, Closed circuit systems, i.e., air recirculating15/347, With dust or dirt handling or storing or separating, e.g., filter bags15/352, Separator element cleaning in situ and/or storage or removal of retained dirt15/353, With liquid and/or deflection type separator55/432With movable or manipulable means controlling escape of residue
ExaminersPrimary: Hornsby, Harvey C.
Assistant: Gerrity, Stephen F.
Attorney, Agent or Firm
International ClassE01H 001/08
Foreign Application Priority Data1986-09-09 JP
AbstractA road-cleaning vehicle has a pneumatic pickup head held against the road surface for collecting rubbish therefrom as a current of air is supplied from a blower. Carrying the collected rubbish, the air flows from the pickup head to a rubbish hopper in which the rubbish is deposited. Rid of the rubbish but still laden with dust particles, the air flows from the rubbish hopper to an air-dust separation chamber having a generally cylindrical shape, in which the dust is centrifugally separated from the carrier air as the latter spirals toward the blower. The air-dust separation chamber has a dust outlet open to an entrance end of a dust collection vessel generally sloping downwardly as it extends away from the air-dust separation chamber and terminating at an exit end open to the rubbish hopper. Hingedly mounted to the exit end of the dust collection vessel is a door which, during the rotation of the blower, is closed against the exit end by virtue of a partial vacuum created in the vessel, until the weight of the separated dust on the door overcomes the suction being exerted thereon. Preferably, the dust particles are sprayed with water before being admitted into the air-dust separation chamber.
Field of SearchPower propelled vehicle or carrier
With dust or dirt handling or storing or separating, e.g., filter bags
Separator element cleaning in situ and/or storage or removal of retained dirt
With liquid and/or deflection type separator
Air blast with suction
Closed circuit systems, i.e., air recirculating
With movable or manipulable means controlling escape of residue
Tangential gas inlet opening in casing