Patents by Inventor Igor Fraiberg

Igor Fraiberg 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).

  • Threaded joint toggle-locked with a helical spring
    Patent number: 4408927
    Abstract: A resilient holding device comprising a looped helical spring or a closed loop of interconnected essentially circular disc elements confined to an annular cavity circumferentially within a threaded joint or coupling. By tightening the threaded joint or coupling such as to engage the confined spring, a latching effect is created that requires a reverse torque for disassembly that exceeds the torque required to tighten. Such a torque biased threaded coupling is particularly useful in oil field applications.
    Type: Grant
    Filed: August 17, 1981
    Date of Patent: October 11, 1983
    Assignee: Gearhart Industries, Inc.
    Inventor: Igor Fraiberg