SHOCK-ABSORBABLE BICYCLE FRAME AND METHOD OF MANUFACTURING THE SAME
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United States of America Patent
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Issued Date -
Jun 12, 2014
app pub date -
Feb 6, 2013
filing date -
Dec 6, 2012
priority date (Note) -
Abandoned
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Abstract
A shock-absorbable bicycle frame includes a tubular member formed of an internal tube and an external tube sleeved onto at least one part of the internal tube. None of any gap is formed between the internal and external tubes. The internal tube is made of fiber reinforced thermosetting plastic. The external tube is made of fiber reinforced thermoplastic plastic. The method of manufacturing the shock-absorbable bicycle frame includes the steps of putting a fiber fabric impregnated with thermoplastic resin into a mold and heating it up to 230-250° C. to form an external tube, and inserting a fiber fabric impregnated with thermosetting resin into the external tube and heating it up to 140-160° C. to form an internal tube inside the external tube. In light of this, the bicycle frame is not only lightweight and preferably shock-absorbable but simple in fabrication with high yield rate.
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