Patents by Inventor Charles A. Lieffring

Charles A. Lieffring 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).

  • Patent number: 7207438
    Abstract: A tool tray having a universal support system enables the tool tray to be placed on a variety of working surfaces. The tool tray includes a rectangular platform having a flat surface surrounded by a plurality of upstanding walls. The platform is supported by four legs which are attached to the platform and protrude downwardly therefrom. The legs each have a bottom surface for supporting the platform on a horizontal surface, and a tapered inner side surface for engaging opposite sides of a vehicle tire for supporting the platform on the vehicle tire. The legs are slidably adjustable to accommodate different sizes of vehicle tires. Two detachable socket trays and a detachable parts tray are attached to the platform by respective structures that hook over the upper edges of the platform. Handles are formed at respective opposite ends of the platform to facilitate lifting and carrying the tool tray assembly.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: April 24, 2007
    Inventors: Charles A. Lieffring, Francis E. Lieffring
  • Publication number: 20040159578
    Abstract: A tool tray having a universal support system enables the tool tray to be placed on a variety of working surfaces. The tool tray includes a rectangular platform having a flat surface surrounded by a plurality of upstanding walls. The platform is supported by four legs which are attached to the platform and protrude downwardly therefrom. The legs each have a bottom surface for supporting the platform on a horizontal surface, and a tapered inner side surface for engaging opposite sides of a vehicle tire for supporting the platform on the vehicle tire. The legs are slidably adjustable to accommodate different sizes of vehicle tires. Two detachable socket trays and a detachable parts tray are attached to the platform by respective structures that hook over the upper edges of the platform. Handles are formed at respective opposite ends of the platform to facilitate lifting and carrying the tool tray assembly.
    Type: Application
    Filed: February 6, 2004
    Publication date: August 19, 2004
    Inventors: Charles A. Lieffring, Francis E. Lieffring