Patents by Inventor L. Clark Feightner

L. Clark Feightner 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).

  • Electromagnetic actuator having preloaded spring means
    Patent number: 4290040
    Abstract: An actuator comprising a coil, an armature moveable along a path toward and away from the coil, and a spring for resiliently urging the armature in one direction along the path. The coil is energizable to urge the armature in the other direction along the path against the biasing action of the spring. The spring rate of the spring progressively increases as the armature is moved by electromagnetic forces. This is accomplished by using an appropriately configured leaf spring and a a ramp for progressively supporting the leaf spring as it is deflected. The leaf spring is also preloaded.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: September 15, 1981
    Inventors: L. Clark Feightner, E. Dale Hartley