Patents by Inventor Ronald F. Robinson

Ronald F. Robinson 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: 4102223
    Abstract: The device is for mounting a saw chain firmly and securely for sharpening its cutter elements and for automatically advancing the cutter elements one by one consecutively through a sharpening station for sharpening by the grinding wheels. The holding device includes two pairs of holding finger elements which coact with a back plate to clamp on to the rivets of the cutter elements to be sharpened. The automatic advancing device includes an index finger mounted on a sliding platform which is slidable juxtaposed to the saw chain support. The index finger is operative to abut a selected cutter element and to advance a pair of left hand and right hand cutter elements to the sharpening station in each forward and backward movement cycle of the sliding platform. A pair of positioning plungers are provided to ensure the cutter elements are properly positioned in the shaprening station before they are clamped in place for sharpening by the grinding wheels.
    Type: Grant
    Filed: October 7, 1976
    Date of Patent: July 25, 1978
    Inventors: Geoffrey H. Robinson, Ronald F. Robinson