Patents Assigned to Walter Lipscomb
  • Shoring device
    Patent number: 4787781
    Abstract: There is disclosed a device for shoring the side walls of a trench or the like which includes a pair of elongate rails and a pair of parallel, hydraulically extendible and contractible actuators connected at opposite ends to the rails for lowering with the rails into and out of positions between the walls of the trench, and adapted, when extended, to hold the rails tightly against the walls.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: November 29, 1988
    Assignee: Walter Lipscomb
    Inventor: George Bradberry