Patents by Inventor Richard D. Maska

Richard D. Maska 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).

  • Portable screening/dosing/mixing plant
    Patent number: 5294065
    Abstract: A high-rate portable self-contained combination screening/dosing/mixing plant is mounted on a single tractor trailer for highway travel in most states without requiring travel escort vehicles. The plant has a nominal capacity of about 100 tons of soil or dirt per hour, and includes an apparatus train for preliminary separation of large objects, hopper storage, uniform feed rate, shredding-pulverization, particle size screening, additive dosing, mixing and conveyance to an elevated position for transfer to a dump truck, bin or pile.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: March 15, 1994
    Assignee: Portec, Inc.
    Inventors: Timothy O. Harms, Daryl P. Jones, Richard D. Maska, Mark D. Mulloy