Patents by Inventor Ritva M. Lehtovaara

Ritva M. Lehtovaara 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).

  • Self-adjusting drive shaft for barbecue grid
    Patent number: 4165731
    Abstract: A barbecue having a rotatable grid is provided with a motor and drive shaft to rotate the grid. The drive shaft is self-adjusting for use with different heights of grid and sizes of barbecue. The drive shaft may be used to adapt existing barbecues.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: August 28, 1979
    Inventor: Ritva M. Lehtovaara
  • Bearing assembly for barbecues
    Patent number: 4129111
    Abstract: A barbecue comprises a stand supporting a body member arranged to contain a bed of burning fuel and a horizontal grid mounted above the fuel bed, the bed or the grid being mounted on a vertical rotatable shaft, and a motor below the bed connected to the shaft to rotate the shaft continuously, the motor and the shaft being supported by a bearing assembly which is suspended below the body member of the barbecue by support means allowing the bearing assembly to tilt about two perpendicular horizontal axes. The barbeque may be fully portable and dismantled for easy transport.
    Type: Grant
    Filed: July 15, 1976
    Date of Patent: December 12, 1978
    Inventor: Ritva M. Lehtovaara