Patents by Inventor John H. Thurk

John H. Thurk 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: 5219450
    Abstract: A movable asphalt mixing plant which is towed behind a milling machine. The mixing plant includes an input conveyor which receives the crushed aggregate from the milling machine. The aggregate is then introduced into a pug mill carried by the mobile plant. A heated storage tank and appropriate pumps and conduits for asphaltic cement located on the mobile plant allow the asphaltic cement to be mixed with the aggregate in the pug mill. The amount of asphaltic cement added to the aggregate may be controlled by a microprocessor which receives input regarding the production rate and input weight of aggregate. Asphaltic paving material produced by the pug mill is dispensed from the rear of the plant. A heating system employing hot circulating oil is also provided to ensure that the pumps and conduits for the asphaltic cement flow freely. A steering mechanism is provided for the plant to ensure centering for proper reception of aggregate and dispensing of paving material.
    Type: Grant
    Filed: August 6, 1992
    Date of Patent: June 15, 1993
    Inventor: John H. Thurk