Patents by Inventor David B. Canterbury

David B. Canterbury 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: 9821317
    Abstract: A method and apparatus for separating components of wet cement. A reclaim gate includes a tumbler flange with a tumbler flange opening. A strainer having strainer openings passes sand, rinse water, and cement slurry while blocking cement aggregates. A fixed plate entraps the strainer in place. The fixed plate has a reclaim aperture aligned with the screen. A rotating turn plate having a matching reclaim aperture is adjacent the fixed plate. A gate actuator retains the turn plate adjacent the fixed plate such that the turn plate can turn to selectively align the turn plate aperture with the fixed plate aperture. In use the aggregates are blocked by the screen, the sand passes through and is filtered; the slurry passes through and is collected and settled. The aggregates, sand, and rinse water can be recovered.
    Type: Grant
    Filed: January 11, 2016
    Date of Patent: November 21, 2017
    Inventor: David B. Canterbury