Hollow core in-line skate wheel having contour conforming polyurethane wall
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United States of America Patent
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-
Jun 1, 1999
Issued Date -
N/A
app pub date -
Jul 12, 1996
filing date -
Dec 12, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A skate wheel including a hard urethane hub formed with a drop center between radially projecting guide flanges, and including stand-off ribs disposed in equidistant spaced relation thereabout. Pairs of centering fins are spaced axially along a number of stand-off ribs thereby forming a central groove along the drop center. An annular bladder with an interior annular stand-off skirt is nested within the centering fins and concentric with the drop center. The wheel body is formed of a soft polyurethane and surrounds the drop center and encapsulates the annular tube, thereby forming a contoured surface. A method of manufacturing the wheel that includes selecting a welded seam annular tube, pre-pressurize it and then further pressurize it through the exothermic reaction by pouring liquid urethane in a mold to form the tire.
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