Patents by Inventor Charles Simpson Cooper

Charles Simpson Cooper 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).

  • Skate sharpener
    Patent number: 4085547
    Abstract: A skate sharpener having a grinding wheel supported over the skate by a combined parallelogram and Watts linkage which guides the grinding element substantially parallel with the sharpened surface of the skate blade while keeping the grinding pressure constant; in preferred embodiments a tension spring forms one vertical link of the parallelogram linkage and a hydraulic cylinder, connected between the parallelogram linkage and the sharpener base, provides a smooth sharpening speed.
    Type: Grant
    Filed: May 2, 1977
    Date of Patent: April 25, 1978
    Assignee: Lawson-Hemphill Inc.
    Inventors: John B. Lawson, Charles Simpson Cooper, Alfred Slocum Vail