Patents by Inventor Charles W. Smerker

Charles W. Smerker 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: 4977914
    Abstract: A slip resistent apparatus for walking aids such as canes, crutches and walkers is disclosed. The apparatus provides a spring biased, lever actuated, selectively operable, ground engaging probe slidingly displaced within the vertical structure of the walking aid. The probe is a pointed elongate rod. A hand operated lever with attached actuating arm is affixed to the walking aid and rests against the upper portion of the rod. Actuation of the lever transmits a compressive force to the spring biased probe extending the pointed tip to make engagement with the ground, thus providing a slip resistant walking aid. The sliding rod is adjustable in length to accommodate different heights of walking aids and is adapted to fit the different types of walking aids including canes, crutches and walkers.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: December 18, 1990
    Inventor: Charles W. Smerker