Patents by Inventor John L. Rudolf

John L. Rudolf 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: 5092583
    Abstract: The exerciser of the invention is of a type of apparatus generally classified as a "skip rope". However, instead of having a rope coupled between a pair of handles, the exerciser of the invention utilizes a length of hollow tubing in which an amount of metal shot is added to exert a pulling force on a user's muscles during a "skip" exercise. The tubing is also detachable from either or both of its handles, to adjustably permit shot to be further added or removed according to the strength of the person utilizing the exerciser and/or to adjust the length of the tubing according to the user's height. In a preferred embodiment of the invention, a pair of "stops" are incorporated at opposing positions on the tubing, so as to prevent the shot traveling from end-to-end, and so as to create a "shot-free" zone at that length of tubing which strikes the floor during the normal "skipping" exercise.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: March 3, 1992
    Inventor: John L. Rudolf