Patents Examined by Chris K. Modre
  • Patent number: 6272720
    Abstract: A sweeping machine composed of a brush assembly (1) and a suction assembly (5, 7, 9) sucking dirt that has been brushed off a ground surface. The brush assembly (1) has two elongate, cylindrical brushes (1) which are symmetrically arranged on either side of the travelling direction (K) and have radial bristles and a horizontal drive shaft (3) for rotation of the brushes. The drive shafts (3) extend transversely of the travelling direction and make a positive acute angle with the transverse direction, and the ends of the brushes (1) facing each other are arranged at a distance from each other. The brush assembly (1) is enclosed in a downwardly open housing (2) whose lower edge is formed of an elastic skirt (15) arranged to drag its free edge along the ground surface. The suction assembly has a suction nozzle (5) which is connectible to a suction device (7) supported by a vehicle (8). The suction nozzle (5) is elongate and extends transversely of the travelling direction (K) and behind the brushes (1).
    Type: Grant
    Filed: October 20, 1999
    Date of Patent: August 14, 2001
    Assignee: DISAB Vacuum Technology AB
    Inventors: Gert Axel Lövgren, Karl Thorbjorn Haugen