Patents by Inventor Henry Bergstrom

Henry Bergstrom has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus for cleaning hard surfaces
    Patent number: 4654916
    Abstract: A machine for cleaning of preferably hard surfaces, which machine has two brushes (101,102) rotating against each other. The brushes throw dirt particles through a gap between the brushes to a container (117). Between the brushes and the container there is a transport channel (118) for the dirt particles which widens in an upward direction. Means (128,132) for the supply of liquid detergent are provided having permeable devices (132) which supply liquid detergent to the brushes due to the rotation of the brushes.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: April 7, 1987
    Assignee: Arne Postonen
    Inventors: Arne Postonen, Henry Bergstrom