Patents by Inventor Luther Bradford Barringer

Luther Bradford Barringer 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: 5839707
    Abstract: A trench shield stacking bracket provided for facilitating the stacking of trench shields. The trench shield stacking bracket comprises an elongate hollow body frame which defines a pair of spaced apart trench shield spreader bar engaging Wall having upper and lower portions. The trench shield spreader bar engaging walls define upwardly opening trench shield spreader bar engaging slots in the upper portions thereof. The trench shield spreader bar engaging walls define downwardly opening trench shield spreader bar engaging slots in the lower portions thereof in opposed spaced apart register with the upwardly opening trench shield spreader bar engaging slots. Means are provided to selectively retain trench shield spreader bars selectively positioned within the upper and lower spreader bar engaging slots-during trench shield stacking operations.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: November 24, 1998
    Assignee: Efficiency Production, Inc.
    Inventor: Luther Bradford Barringer
  • Patent number: 5735642
    Abstract: A rotatable trench shield handling assembly provided with upwardly extending excavator hook-engaging means. The rotatable trench shield handling assembly provided with rear downwardly extending trench shield wall engaging means and with an opposed forward transversely positioned horizontally oriented trench shield wall engaging guide stabilizer bar means which cooperates with the rear spaced apart trench shield wall engaging means to positively and easily engage the trench shield so as to enable the excavator operator to have positive control of the trench shield while lifting, handling, lowering, and selectively stacking the trench shield into its operative use position within a trench and subsequently removing the trench shield therefrom.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: April 7, 1998
    Assignee: Efficiency Production, Inc.
    Inventor: Luther Bradford Barringer
  • Patent number: D399724
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: October 20, 1998
    Assignee: Efficiency Production, Inc.
    Inventor: Luther Bradford Barringer
  • Patent number: D417764
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: December 14, 1999
    Assignee: Efficiency Production, Inc.
    Inventor: Luther Bradford Barringer