Patents by Inventor Andrew O. Williamson

Andrew O. Williamson 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: 4463812
    Abstract: Apparatus for mounting on earth moving machinery including a blade portion, a rake portion, a support portion and a mounting portion; the blade portion including a substantially straight elongated plate section and a curved section extending therefrom; the rake portion including a plurality of spaced tooth members associated with the blade portion, the tooth members being disposed generally transversely of the length of the blade portion, each of the tooth members including a shank section and a hook section, each of the shank sections being disposed between a pair of spaced cross members extending substantially perpendicular to the plate section, aligned openings through the pair of cross members and the shank section and a pin extending therethrough; the support portion including a bar member supporting the tooth members, a longitudinal section located adjacent to the bar member; the mounting portion including side connectors disposed adjacent the side edges of the bar member, arm members releasably engagea
    Type: Grant
    Filed: February 15, 1983
    Date of Patent: August 7, 1984
    Inventor: Andrew O. Williamson