Patents Assigned to Bieri Pumpenbau A.G.
  • Mobile machine for cleaning swimming pools
    Patent number: 3979788
    Abstract: A mobile machine for cleaning swimming pools by suction removal of sediment from the bottom of the swimming pools comprises a water turbine driving a drive wheel in such a way that the machine follows a self-steered path on the bottom of the swimming pools. The drive wheel is capable of rotating about a vertical steering axle to prevent the machine from becoming blocked at a wall or in a corner of the swimming pools.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: September 14, 1976
    Assignee: Bieri Pumpenbau A.G.
    Inventor: Benedikt Strausak