Patents by Inventor Randal B. Smith

Randal B. Smith 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).

  • Collapsible spacer
    Patent number: 5352064
    Abstract: A collapsible spacer for disposition between a form for a concrete foundation member and the underlying soil includes voids to allow the spacer to deform permanently and occupy a reduced volume when upheaving of the soil occurs. The spacer is fabricated from a material, such as expanded polystyrene foam, whose structural strength is not significantly altered by exposure to moisture. Embodiments of the spacer which are suited for use with forms for foundation beams and slabs are discussed.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: October 4, 1994
    Assignee: Plasti-Fab Ltd.
    Inventors: Bruce M. Carruthers, F. Gordon French, B. Wayne Heath, Randal B. Smith