Infinitely variable transmission

摘要

The invention relates to an infinitely variable transmission provided with an endless transmission member and at least one V-shaped pulley of which at least one sheave is rigidly connected to a hydraulic cylinder-piston unit for the axial displacement of this sheave. The said cylinder-piston unit being provided with a pressure-equalizing chamber for the compensation of pressure rises in the cylinder space due to centrifugal forces. The pressure-equalizing chamber can be supplied with fluid from the cylinder space through a charging port. In order to overcome the drawback of particles obstructing regularly the charging port, ahead of the charging port a filtering member is provided through which the fluid flow must pass.