Patents by Inventor Ralph Herdan

Ralph Herdan 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).

  • Suction operated carpet laying device
    Patent number: 5626329
    Abstract: A carpet laying device comprises an anchor unit, a mobile unit and a drive system. The mobile unit and the anchor unit are secured to the carpet by suction provided by electrically driven exhaust fans. In use, the mobile unit is driven by the drive system away from the anchor unit to smooth out or stretch the carpet, the friction between the carpet and the mobile unit being weaker than that between the carpet and the anchor unit. In an alternative device, the anchor unit is a cushioned pad for abutment with a wall.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: May 6, 1997
    Inventor: Ralph Herdan