Patents by Inventor David D'Arcy Clifford

David D'Arcy Clifford 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).

  • Method for laminating and forming a composite laminate in a single operation
    Patent number: 7204906
    Abstract: A method of laminating and forming a non-planar composite part from a pair of metal skins having an intervening paper layer in a single operation maintains a uniform pressure between die faces. The paper layer may be degassed prior to the lamination/forming process.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: April 17, 2007
    Assignee: Dofasco Inc.
    Inventor: David D'Arcy Clifford
  • Structural panel and method of manufacture
    Patent number: 6949295
    Abstract: A fibrous core material is disposed between and bonded to metal skins to form a structural laminate having comparable strength to steel sheets of greater weight.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: September 27, 2005
    Assignee: Dofasco Inc.
    Inventor: David D'Arcy Clifford
  • Cargo vehicle wall
    Patent number: 6866329
    Abstract: A cargo vehicle has lightweight rigid panels formed of metal skins and intervening paper layer. Laminate panels are formed using a heated press.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: March 15, 2005
    Assignee: Dofasco Inc.
    Inventor: David D'Arcy Clifford
  • Structural panel and method of manufacture
    Publication number: 20040175554
    Abstract: A fibrous core material is disposed between and bonded to metal skins to form a structural laminate having comparable strength to steel sheets of greater weight.
    Type: Application
    Filed: January 26, 2004
    Publication date: September 9, 2004
    Inventor: David D'Arcy Clifford
  • Structural panel and method of manufacture
    Patent number: 6696164
    Abstract: A fibrous core material is disposed between and bonded to metal skins to form a structural laminate having comparable strength to steel sheets of greater weight.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: February 24, 2004
    Assignee: Dofasco Inc.
    Inventor: David D'Arcy Clifford
  • Light-weight structural panel
    Patent number: 6546694
    Abstract: A structural panel comprises a metal and fibrous composite in which the metal outer skins have a minimum thickness of 0.005 in. exceeding foils and a maximum thickness of 0.012 in. while the fibrous core ranges between 0.01 in. and 0.05 in. The panel is a stiff, lightweight substitute for thicker metals and may replace light metal sheets such as aluminum with a composite in which the metal skins comprise sheets from heavier metals such as steel. The fibrous core is a web which is adhesively bonded to the metal skins and which has a plurality of weight-reducing openings formed therein to form a structural laminate having comparable strength to steel sheets of greater weight.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: April 15, 2003
    Assignee: Dofasco Inc.
    Inventor: David D'Arcy Clifford
  • Structural panel and method of manufacture
    Patent number: 6419774
    Abstract: A fibrous core material is disposed between and bonded to metal skins to form a structural laminate having comparable strength to steel sheets of greater weight.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: July 16, 2002
    Inventor: David D'Arcy Clifford
  • Structural panel and method of manufacture
    Patent number: 6171705
    Abstract: A fibrous core material is disposed between and bonded to metal skins to form a structural laminate having comparable strength to steel sheets of greater weight.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: January 9, 2001
    Assignee: Dofasco, Inc.
    Inventor: David D'Arcy Clifford
  • Structural panel with kraft paper core between metal skins
    Patent number: 5985457
    Abstract: A structural panel comprises a metal and paper composite in which the metal outer skins have a minimum thickness of 0.005 in. exceeding foils and a maximum thickness of 0.012 in. while the paper core ranges between 0.01 in. and 0.05 in. The panel is a stiff, lightweight substitute for thicker metals and may replace light metal sheets such as aluminum with a composite in which the metal skins comprise sheets from heavier metals such as steel. The paper core is a web which is adhesively bonded to the metal skins and which may have openings to create paths for adhesive bridges between the metal skins to minimize failure caused by buckling.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: November 16, 1999
    Assignee: Dofasco Inc.
    Inventor: David D'Arcy Clifford