1981-06-04
1983-05-31
Pinkham, Richard C.
Undertaking
273DIG5, 273DIG6, 273DIG12, A63B 520
Patent
active
043857590
ABSTRACT:
A skip rope for exercise and fitness conditioning includes a length of polypropylene rope threaded through two handle members disposed at opposite ends of the length of rope. After the rope is threaded through each handle member, the free ends of the rope are knotted to prevent it from pulling back through the two handles. Each handle is constructed of a tubular section of polyvinylchloride which has nylon end plugs press fit into the open ends of the tube. The outside diameter surface of each end plug coincides with the outside diameter surface of the polyvinylchloride tubing and each end plug includes a rope-receiving clearance aperture just slightly larger than the outside diameter of the rope. The material combination of nylon for the end plug and polypropylene for the rope provides a type of self-lubricating interface which enables the rope to turn and twist completely independent of the handle. Further, this self-lubricating characteristic enables the rope to slide relative to the end plugs without wear or abrasion to any significant degree.
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patent: 4158457 (1979-06-01), Hydro
patent: 4201382 (1980-05-01), Wilson
patent: 4251070 (1981-02-01), Leseberg
Kramer Arnold W.
Pinkham Richard C.
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