Patents by Inventor Earl H. Robbins

Earl H. Robbins 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).

  • Laminated veneer lumber (LVL)
    Patent number: 4844763
    Abstract: A dimensionally stable composite wood panel having wood veneer sheets with their grains disposed in the same direction, and a core of adhesively-bonded biomass particles is improved by including a third wood veneer sheet having its grain substantially perpendicular to the grains of the surface veneer sheets. Additional veneer sheets may lie intermediate the surface sheets and the intermediate sheet, with its grain structure oriented parallel to the surface sheets. The panel produced may be ripped or sawed to form laminated veneer lumber of such dimensions that is may be substituted for structural lumber. The laminated veneer lumber of the present invention has improved dimensional stability and may be nailed without splitting or cracking. A process of manufacturing continous or indefinite lengths of the composite wood panel is disclosed.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: July 4, 1989
    Inventor: Earl H. Robbins
  • Laminated veneer lumber (LVL)
    Patent number: 4743484
    Abstract: A dimensionally stable composite wood panel having wood veneer sheets with their grains disposed in the same direction, and a core of adhesively-bonded biomass particles is improved by including a third wood veneer sheet having its grain substantially perpendicular to the grains of the surface veneer sheets. Additional veneer sheets may lie intermediate the surface sheets and the intermediate sheet, with its grain structure oriented parallel to the surface sheets. The panel produced may be ripped or sawed to form laminated veneer lumber of such dimensions that it may be substituted for structural lumber. The laminated veneer lumber of the present invention has improved dimensional stability and may be nailed without splitting or cracking. A process of manufacturing continuous or indefinite lengths of the composite wood panel is disclosed.
    Type: Grant
    Filed: February 5, 1986
    Date of Patent: May 10, 1988
    Inventor: Earl H. Robbins
  • Composite wood panel
    Patent number: 4569873
    Abstract: The dimensional stability of a composite wood panel having two surface wood veneer sheets with their grains disposed in the same direction and a core of adhesively bonded biomass particles such as processed wood particles is improved by including a third wood veneer sheet having its grain substantially perpendicular to the grains of the surface veneer sheets substantially centrally disposed in the core between the surface veneer sheets. The panel may be used as a wood structural panel in buildings, in furniture, or the like.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: February 11, 1986
    Inventor: Earl H. Robbins