Apparatus for exercise of the human body
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United States of America Patent
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Apr 2, 1991
Issued Date -
N/A
app pub date -
Jun 26, 1989
filing date -
Mar 25, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus is disclosed for use in the exercise of the human body, which comprises a fiberglass pultruded shape of a predetermined oblong geometry with an elastic sheath formed about the exterior thereof over the length of the fiberglass pultruded shape. The fiberglass pultruded shape has fiberglass filaments dimensionally stabilized in a hardened resin system. Material properties of the filaments in the resin system are selected such that the ultimate elongation design value of the filaments and the resin system is greater than the actual maximum elongation of the filaments and the resin system when the fiberglass member is flexed in the exercise process. Also, the resin is selected for toughness sufficient to provide a useful flexural fatigue life.
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