Patent ID: 8601905

Claim:
A driving force transmitting apparatus comprising: a first division casing member having a first coupling surface; a second division casing member having a second coupling surface, wherein a casing is formed by matching the first and second casing members at the first and second coupling surfaces; a first rotational shaft rotatably supported by the first and the second division casing members, wherein a center of rotation of the first rotational shaft is located in a common plane of the first and second coupling surfaces; a first gear provided on the first rotational shaft; a second rotational shaft rotatably supported with respect to the first division casing member; a second gear provided on the second rotational shaft and being in mesh with the first gear; a partition wall integrally formed on the second division casing member and extending in a direction intersecting with said common plane; a shield plate crossing the partition wall; a breather chamber connected with an interior of the casing and defined by the partition wall, the shield plate, and the an outer wall of the second division casing member; and a passage that connects the breather chamber and an exterior of the casing, wherein the first rotational shaft has a longitudinal axis, and is rotatable about the longitudinal axis.