Patents by Inventor Frieder Mathis

Frieder Mathis 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: 6371504
    Abstract: Fifth wheels are used to establish an articulated connection between a truck tractor and a semi-trailer. They consist of a plate (1) which is attached to the truck tractor and generally has at least one arched slideway lining (4a,4b) acting as a bearing surface and fitting into corresponding recesses of the fifth wheel plate (1) where it is fastened. According to the invention, fastening is provided in the form of a positive fit connection, whereby the lower part of the slideway lining (4a,b) and the upper part of the plate (1) have joining elements (6,8) to ensure a rotationally locked positive fit, thus enabling thermal dilation to occur in the fifth wheel plate (1). Preferably, the positive fitting joining elements for the lower side of the slideway lining (4a,b) are configured as ribs (6) extending radially outwards from a virtual center point (7) and the positive fitting joining elements for the upper side of the fifth wheel plate (1) are configured as complementary grooves (6).
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: April 16, 2002
    Assignee: Jost-Werke GmbH & Co. KG
    Inventors: José Manuel Alguera Gallego, Frieder Mathis, Wolfgang Pohl, Martin Schneider, Rainer Spitz