Patent ID: 9109694
Filing Date: 2015-08-18
Classification: F16H

Abstract:
1. A driving pulley for a continuously variable transmission comprising: a shaft having a passage defined therein; a fixed sheave mounted on the shaft; a first sleeve disposed around the shaft, the first sleeve being operatively connected to the shaft for rotation therewith, and being axially movable relative to the shaft; a movable sheave mounted on the first sleeve for rotation and axial movement therewith, the fixed and movable sheaves being adapted to receive a belt therebetween, the passage of the shaft and at least a portion of the fixed sheave being disposed on opposite sides of a plane passing through a center of the belt; a second sleeve disposed around the first sleeve, the second sleeve being connected to the shaft for rotation therewith; a spring biasing the movable sheave away from the fixed sheave; and a CVT chamber having at least one opening adapted for fluidly communicating the CVT chamber with a hydraulic fluid reservoir, hydraulic fluid from the hydraulic fluid reservoir flows sequentially through the shaft from one side of the plane to an other side of the plane where the passage of the shaft is located, through the passage in the shaft and in the CVT chamber, hydraulic pressure in the CVT chamber biasing the movable sheave toward the fixed sheave, the CVT chamber having an annular cross-section, and the CVT chamber having: