Patents by Inventor Raymond C. Hatfield

Raymond C. Hatfield 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: 4328965
    Abstract: A compact, portable archery exerciser allows an archer to accurately emulate the pulling of a bow to tone and strengthen the muscles used in archery. A first embodiment of the exerciser comprises two elongated handle members which are interconnected at the ends by a selectable number of resilient members to provide an exerciser with a selectable pull weight. A second embodiment of the exerciser includes a housing having an internal chamber and a handle portion for receiving an archer's bow holding hand. A spring loaded pulley is mounted within the chamber and receives a cable which, when unwound from the pulley, compresses the spring. The cable is routed outside the chamber where it is attached to a handle which is positioned to allow an operator of the exerciser to pull the handle away from the handle portion of the housing to accurately simulate the pulling of a bow.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: May 11, 1982
    Inventor: Raymond C. Hatfield