Patents by Inventor Leo Lahtinen

Leo Lahtinen 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: 4274212
    Abstract: Plow apparatus for work vehicles, particularly of the type which travel on rails, including at least one plow plate pivotally mounted on a respective end of the vehicle in a manner such that the plow plate can be pivoted through an angle of about 180.degree. between a front plowing position in the track of the vehicle and a slide plowing position on the side of the vehicle. The plow plate is pivotally mounted about a vertical axis which is laterally offset to one side of the center-line of the vehicle. In this manner, as the direction in which the vehicle is driven is changed, the plow plate can be pivoted from the front plowing position to the slide plowing position and vice versa. Preferably, such a plow plate is mounted on each end of the vehicle, each plow plate being pivotable about a vertical axis which is offset to the opposite sides of the vehicle center-line.
    Type: Grant
    Filed: October 16, 1979
    Date of Patent: June 23, 1981
    Assignee: Valmet
    Inventors: Matti Kurkela, Leo Lahtinen, Raimo Ylivakeri