Patents by Inventor Robert L. Campbell

Robert L. Campbell 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: 4368800
    Abstract: A scaffold apparatus usable in conjunction with conventional on-site building materials to provide an adjustable scaffold, the scaffold apparatus having a matched pair of plank brackets with a releasable clamping mechanism adapted to clamp the brackets to a pair of spaced timber posts, the plank brackets having cantilevered arm portions extending from the post on which a horizontal cross plank is supported, the brackets having an adjustment mechanism cooperating with a cable for raising and lowering the brackets and cross plank on the timber posts, the plank brackets in combination with additional hardware for supporting and bracing the timber posts forming a compact scaffolding kit.
    Type: Grant
    Filed: March 16, 1978
    Date of Patent: January 18, 1983
    Inventor: Robert L. Campbell