Patent ID: 9366331
Filing Date: 2016-06-14
CPC Classification: F16H

Claim Text:
1. A case for a continuously variable transmission having a drive clutch and a driven clutch held by a drive shaft and a driven shaft respectively, wherein the drive shaft and the driven shaft are offset in a longitudinal direction, each of the drive and the driven shafts extends in a lateral direction that is orthogonal to the longitudinal direction, and a vertical direction is transverse to each of the longitudinal direction and the lateral direction, wherein the drive and driven clutches include side faces, the case comprising: an air inlet extending through an inlet end of the case; an air outlet extending through an outlet end of the case, wherein the outlet end is substantially opposite the inlet end of the case; and an airflow channel within the case that guides at least a portion of flowing air from the air inlet downstream to the air outlet, wherein the airflow channel has a ramp region that is downstream from the air inlet and upstream from the air outlet and, wherein the ramp region includes a lower internal surface, an upper internal surface offset from the lower internal surface in the vertical direction, an upstream ramp portion, and a downstream ramp portion that is downstream from the upstream ramp portion, wherein a vertical height of the ramp region corresponds to a vertical distance, in the vertical direction, between the upper and the lower internal surfaces of the ramp region and, wherein the vertical distance between the upper and the lower internal surfaces of the ramp region varies along the longitudinal direction such that a vertical height of the upstream ramp portion is less than a vertical height of the downstream ramp portion.