Patent ID: 7370729
Filing Date: 2008-05-13
Classification: F16H,Y10T

Abstract:
1. A transmission having a case, with a shifting device and a breather device comprising: a breather which links a space within the transmission case to outside air, wherein the breather opens to a space within the transmission case at an intermediate position in an axial direction on an upper portion of the transmission case, such that the breather is displaced in a lengthwise direction from a middle position in the axial direction of the space within the case, and opens to outside air via a ventilating mechanism extending in a direction opposite the direction of displacement, a brake friction member including a plurality of plates accommodated within the case; an inner spline extending from a peripheral wall of the case; a hydraulic servo cylinder built into a rear wall of the case; and a brake piston with an extension tube portion, accommodated within the case, which is actuated so that the extension tube portion reaches an end of the brake friction member, the extension tube portion being extended from the hydraulic servo cylinder, and an end of the extension tube portion being secured by and fitted into the spline, wherein the breather opens to the space within the transmission case, on an outer side of the extension tube portion of the brake piston, and at a location which is aligned with the extension tube portion in a direction perpendicular to the axial direction.