Patents by Inventor Robert H. Corbett

Robert H. Corbett 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).

  • Method and apparatus for controlling the discharge of concrete from a concrete hose
    Patent number: 6427869
    Abstract: A concrete hose end insert for controlling the discharge of concrete from a concrete hose, having a base member and clamps for securing the insert to a concrete hose end, and having a vertical insert member for positioning within the interior of a concrete hose end. The hose insert momentarily interrupts the concrete free fall, causing the concrete to recombine or partly compact immediately prior to reaching the discharge end of the hose, thereby reducing the velocity of the discharging concrete for more highly controlled placement.
    Type: Grant
    Filed: September 14, 2000
    Date of Patent: August 6, 2002
    Assignee: Berkeley Concrete Pumping, a California corporation
    Inventor: Robert H. Corbett