PULLEY FOR BELT TRANSMISSION DEVICE, NOTABLY FOR A BELT SPEED-VARIATOR, AND BELT SPEED-VARIATOR INCORPORATING SUCH A PULLEY
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United States of America Patent
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Issued Date -
Apr 26, 2012
app pub date -
Oct 17, 2011
filing date -
Oct 25, 2010
priority date (Note) -
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Abstract
A pulley for a belt transmission device of the type including at least one shaft and two flanges supported by the shaft, one of the flanges, recessed centrally and received so as to fit onto the shaft for an axially free installation being fitted with return elements to return in the direction of the other flange, and delimiting with the other flange a groove of variable dimension inside which it is possible for the belt to be inserted, at least one of the flanges being a flange made of synthetic material furnished, on its surface facing the other flange, with a centrally recessed dish made of metal. The or each dish is, in its zone adjacent to the central recess, separated from the flange that it lines by a space, called a peripheral space, which reduces in the zone the thermal exchanges between flange and dish.
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