Patents by Inventor Ernest W. Masterfield

Ernest W. Masterfield 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).

  • Patent number: 4570608
    Abstract: An inertial archery bow stabilizer and vibration dampner is disclosed. A stud is rigidly embedded in the archery bow and has an energy disipating rod fixed to and projecting forwardly of the stud. The rod is received within an encapsulating sealed cylinder having an internal chamber filled with a viscous fluid in which the rod is disposed. At its outer end and externally thereof, the cylinder is provided with another stud to which the archer may afix a selected stabilizing weight. The stabilizer is effective to limit bow movement during arrow cast and rapidly dampen and attenuate energy released as characterized by dampened bow vibration.
    Type: Grant
    Filed: March 29, 1983
    Date of Patent: February 18, 1986
    Inventor: Ernest W. Masterfield