Patents by Inventor Lamar Barrett

Lamar Barrett 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).

  • Adjustable pipe screed support
    Patent number: 4913582
    Abstract: A screed chair having a base member and at least one threaded vertical member mounted therein supports a screed pipe on a yoke offset from the vertical member such that the yoke and pipe are isolated from rotation during rotation of the vertical member to adjust the height of the screed pipe.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: April 3, 1990
    Inventor: Lamar Barrett
  • Concrete delivery trolley
    Patent number: 4877206
    Abstract: A trolley for positioning a concrete delivery conduit in a work area utilizes a carriage member movable along a support beam to carry a pipe engaging cradle. The carriage and cradle permit the conduit to be moved laterally and axially without substantial exertion. The support beam is mounted on adjustable stands to position the conduit at a selected height.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: October 31, 1989
    Inventor: Lamar Barrett