Patents by Inventor Ruben Ayrapetyan

Ruben Ayrapetyan 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).

  • Prestressed wood floor system
    Patent number: 5168681
    Abstract: A prestress floor system for wood floor framing structures places the structure's joists under a laterally directed compressive force while the joists are maintained in their relative positions by blocking elements. The compressive force is provided by a cable anchored at one end to an outermost joist and anchored at the other to a spring that is, in turn, anchored to an outermost joist. The resulting structure has increased vertical stiffness and reduces the amount of deflection, vibration, and noise experienced during loading.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: December 8, 1992
    Assignee: Horsel PLC
    Inventor: Ruben Ayrapetyan