Patents by Inventor Ramapada Kar

Ramapada Kar 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).

  • Building structure with friction based supplementary damping in its bracing system for dissipating seismic energy
    Patent number: 5819484
    Abstract: A building structure includes one or more friction spring energy dissipating units installed as part of its bracing system, each unit including surfaces in frictional contact for dissipating seismic energy. Various bracing configurations are possible. A friction spring energy dissipating unit for such installations includes first and second connections plates at opposed ends of the unit and a friction spring stack supported between the ends within a housing. Both tension and compression forces applied to the connection plates are transmitted to the stack as compression forces.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: October 13, 1998
    Inventor: Ramapada Kar