Patents by Inventor Donald N. Clark

Donald N. Clark 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).

  • Self-aligning pulley, gear or other rotational member
    Patent number: 7329197
    Abstract: An improved alignable pulley or sheave assembly includes: (a) a shaft having a rotational axis and an exterior surface which has a portion that is spherically shaped, (b) a pulley having a perimeter and a central opening with an interior surface that is configured so as to allow the pulley to be mounted on shaft's spherical shaped portion, and (c) a means for locking the shaft and pulley together such that they rotate together while also enabling the pulley to tilt from side to side with respect to a plane that lies perpendicular to the shaft's rotational axis.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: February 12, 2008
    Inventors: Robert M. Gearhart, Donald N. Clark, Kraig A. Clark