Patent ID: 7806793
Filing Date: 2010-10-05
Classification: F16G,F16H

Abstract:
1. A continuously variable belt drive transmission, comprising: an input pulley having tapered surfaces opposed to each other in an axial direction of the input pulley; an output pulley having tapered surfaces opposed to each other in an axial direction of the output pulley; and an endless belt including a plurality of metal elements each having opposed side faces contacted with the respective tapered surfaces of the input and output pulleys, each of the opposed side faces being formed with a plurality of microscopic projections and recesses arranged along a radial direction of the input and output pulleys upon being in contact with the respective tapered surfaces of the input and output pulleys, wherein the tapered surfaces of at least the input pulley are formed with microgrooves and microprojections radially spaced respectively from one another, wherein a pitch of the microgrooves is a sum of a width of a respective microprojection and a width of a respective microgroove, wherein the pitch of the microgrooves of the tapered surfaces of at least the input pulley has a value not more than a width of each of the microscopic projections on the side faces of the metal elements.