Patents by Inventor Robert G. Drysdale

Robert G. Drysdale 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).

  • Stable unbonded fiber-reinforced elastomeric seismic isolators for base isolation system
    Patent number: 8291651
    Abstract: An elastomeric seismic isolator bearing comprising a plurality of elastomeric layers reinforced with a plurality of fiber layers is disclosed, wherein said bearing is capable of exhibiting stable rollover when subjected to a lateral load in an unbonded application.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: October 23, 2012
    Assignee: TDT Ontario Inc.
    Inventors: Robert G. Drysdale, Michael Tait, Hamid Toopchinezhad
  • STABLE UNBONDED FIBER-REINFORCED ELASTOMERIC SEISMIC ISOLATORS FOR BASE ISOLATION SYSTEM
    Publication number: 20100162640
    Abstract: An elastomeric seismic isolator bearing comprising a plurality of elastomeric layers reinforced with a plurality of fiber layers is disclosed, wherein said bearing is capable of exhibiting stable rollover when subjected to a lateral load in an unbonded application.
    Type: Application
    Filed: June 6, 2008
    Publication date: July 1, 2010
    Inventors: Robert G. Drysdale, Michael Tait, Hamid Toopchinezhad