Patents by Inventor Mark J. Parkert

Mark J. Parkert 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: 5918980
    Abstract: A concrete placer for attachment to a skid steer loader which runs only off the auxiliary hydraulics and electric power of the skid steer loader. The concrete placer comprises a hopper, a concrete pump frame, two concrete pumping cylinders, and a small hydraulic cylinder and swing valve assembly which together control movement of a swing valve to alternately receive concrete from each of the two concrete pumping cylinders and discharge it from a porthole in the hopper.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: July 6, 1999
    Inventors: Anton J. Bauermeister, Mark J. Parkert
  • Patent number: 5669712
    Abstract: A concrete placer for attachment to a skid steer loader which runs only off the auxiliary hydraulics and electrical power of the skid steer loader. The concrete placer comprises a hopper, a concrete pump frame, two concrete pumping cylinders, and a small hydraulic cylinder and swing valve assembly which together control movement of a swing valve to alternately receive concrete from each of the two concrete pumping cylinders and discharge it from a porthole in the hopper. Since skid steer loaders are manufactured with regular and high flow hydraulic systems, it is contemplated for the present invention to have two embodiments, one embodiment with a pumping capacity suitable for use with the regular flow hydraulic system and the other embodiment with a pumping capacity suitable for use with the high flow hydraulic system. Applications may include, but are not limited to, placing concrete in hard to reach areas.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: September 23, 1997
    Inventors: Anton J. Bauermeister, Mark J. Parkert