Patents by Inventor Mary K. Van Derworp

Mary K. Van Derworp 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: 4743016
    Abstract: According to the present invention there is provided variable therapeutic and exercise weights which may be used for physical activity, and which are especially useful when used with physical rehabilitation patients. The inventive weights are capable of providing a full range of physical activity necessary for the rehabilitation of the physical rehabilitation patient. These variable therapeutic weights may be used for active exercise, active-assistive exercise and resistive exercise. The variable therapeutic and exercise weights according to the present invention comprise a plurality of hollow members, each of which may be weighted by providing suitable weights in the interior of the hollow members. There is further provided male-type and female-type coupling members which removably couple each of the hollow members to another hollow member. At least one of the hollow members will, preferably, be unweighted and having female-type coupling members at each of the respective ends of the hollow member.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: May 10, 1988
    Inventors: Mary K. Van Derworp, Candida E. Quist