Broom assisted pick-up head
Patent 5542148 Issued on August 6, 1996. Estimated Expiration Date: 
June 7, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 7, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2913744 3078496 3512206 3636585 3886623 High speed pick-up head Patent #: 4773121 InventorAssigneeApplicationNo. 480711 filed on 06/07/1995US Classes:15/346, Closed circuit systems, i.e., air recirculating15/82, Rotary-brush cylinder15/340.3, Including brush15/422.1Width changes along transverse dimensionExaminersPrimary: Moore, Chris K.Attorney, Agent or FirmInternational ClassE01H 001/08AbstractA pick-up head is formed by a housing which defines a broom chamber rearward of an associated air pressure chamber and its associated blast orifice. The broom is rotated in a direction to impel debris from a surface in the same direction as air emitted from the blast orifice toward an associated air suction chamber. Due to the latter arrangement, debris which is "tacky" which is "stuck" onto the surface, or which is too heavy to be moved into the suction air stream by the blast air alone is impelled at a relatively high entrainment velocity toward and into the air suction stream which continues the movement of this debris for eventual discharge into an associated hopper. | |
