Variable speed drive clutch

摘要

In a V-belt drive having a rotating pulley and an annular flange formed about the pulley axis and extending axially from a side of the pulley; a plurality of vanes extending from the radial outer surface of the flange; a plurality of air passages extending through the flange with each passage having an axis directed radially outwardly and toward the plane of said pulley, said passages being close to but in trailing relation to a vane.