Patents by Inventor Walter C. Francis

Walter C. Francis 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).

  • Vaginal speculum
    Patent number: 5072720
    Abstract: A vaginal speculum having padded surfaces on the patient contacting area of the blades thereof serving to minimize patient discomfort and shock immediately prior to and during gynecological examination and/or treatment. A smooth and essentially silent, cam action, mechanism is also provided for opening and locking the instrument in open position.
    Type: Grant
    Filed: January 8, 1990
    Date of Patent: December 17, 1991
    Inventors: Walter C. Francis, E. William Francis
  • Multiple spindle dividing head
    Patent number: 4103589
    Abstract: A multiple spindle dividing head in which each spindle is driven in synchronism from a common drive shaft adapted to be driven from a single source of power which may be pneumatic, hydraulic or electrical, the spindles being moved automatically from an open to a closed work-piece engaging position by pneumatic or hydraulically actuated means which maintain the spindles in the closed position as they are rotated and yet permit the spindles to be readily opened in any rotative position to release the work-pieces engaged thereby.
    Type: Grant
    Filed: September 15, 1976
    Date of Patent: August 1, 1978
    Assignee: Trans-ACC, Inc.
    Inventor: Walter C. Francis