Patents by Inventor John P. Doan

John P. Doan 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: 4930964
    Abstract: A self-loading transport for round hay includes at tilt platform hinged to a transport platform. Round bales of hay are captured onto the tilt platform when it is in an upright position. Then, movement of the transport forward will raise and level the tilt platform with a bale of hay on it. When the tilt platform is in its full erect position, the bale of hay will roll forward from the tilt platform onto the transport platform. A rocker on the tilt platform aids in the smooth motion of the tilt platform and the rear of the transport platform from the transport position to a tilt position with a tilt platform in upright position. When the bales have been transported to the desired location, they are unloaded from the transport by permitting individual trays carrying the bales in transport on the transport platform to rotate upon the transport frame.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: June 5, 1990
    Inventor: John P. Doan