Patents by Inventor Esa Ostring

Esa Ostring 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).

  • Tow bar construction for transport vehicles and transport vehicle combinations, and a transport vehicle combination
    Patent number: 6135484
    Abstract: The invention relates to transport vehicles and combinations thereof and their tow bar constructions comprising a tow bar journalled to the front of the chassis rotatably relative to a vertical and a horizontal axle, and structure for turning the axle. The structure for turning the axle comprise a steering lever secured to the tow bar rotatably relative to the center line of its vertical axle, and supporting arms secured at one end to the steering lever on opposite sides of the vertical axle and at the other end to the axle on its opposite sides.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: October 24, 2000
    Assignee: Tamrock OY
    Inventors: Joel Lauronen, Esa Ostring