Abstract: A wiper motor assembly including an electric motor and a speed reduction gear which are combined as a unit. A clutch assembly is incorporated with the speed reduction gear to cut off a gearing connection between a driving shaft of the motor and an output shaft of the speed reduction gear when the output encounters a certain level of resistance to rotation.

Abstract: A breather configuration for an electric apparatus such as a wiper motor includes a zigzag shaped air flow labyrinth which is formed by a breather outlet and a breather cap. The breather outlet includes a shaft having an air passage hole at its center and a flange formed at the end of the shaft. The flange has notches for passing the air through at its periphery. The breather outlet shaft fits into an installation hole provided in the case. A breather cap is attached to the periphery of the flange of the breather outlet. There is further provided a wall which is extended from the case to surround the breather outlet and the breather cap and an end of which is spaced from a body panel to form a small gap. In the above construction, the air flows through the air flow labyrinth and the gap between the wall and the body panel whereas the water falling on the breather configuration may be discharged by the wall and the labyrinth.