Belt-and-pulley-type continuously variable transmission
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United States of America Patent
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Jun 21, 2016
Grant Date -
Mar 19, 2015
app pub date -
Apr 23, 2013
filing date -
Apr 23, 2012
priority date (Note) -
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Abstract
Continuously variable transmission with a drive belt (3) and with two pulleys (1, 2) that are each provided with two pulley discs (4, 5) with a running surface (8) for arriving in friction contact with a side face (35) of the drive belt (3), wherein both the running surfaces (8) of the pulleys (1, 2) and the side face (35) of the drive belt (3) are made of steel and wherein during operation of the transmission the friction contact is cooled by lubrication oil. At least one of the running surfaces (8) is provided with a multitude of (micron-scale) dimples (11, 13) and/or of grooves (12, 14, 15) arranged in a specific pattern for taking up lubrication oil.
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