Patents by Inventor Ruth Mary Parry

Ruth Mary Parry 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).

  • Six-box linkage mechanism
    Patent number: 4100814
    Abstract: A mechanism is described for effecting movement of an object, article or device in a closed loop planar path while maintaining the major axis of the object, article or device in substantially fixed attitude in the execution of at least an appreciable portion of the path, the mechanism comprising a six-bar linkage the dimensions of which are derived from a four-bar linkage to ensure the fixed attitude motion during motion through at least the appreciable portion of the closed loop path.
    Type: Grant
    Filed: September 21, 1977
    Date of Patent: July 18, 1978
    Assignee: National Research Development Corporation
    Inventors: Gordon Richard Wray, Ruth Mary Parry