Abstract: A temperature-responsive fluid coupling device for driving a cooling fan of an internal combustion engine includes a ball check valve mechanism which is installed in a fluid return passage and a pumping passage, respectively. The valve mechanism comprises a ball check valve positioned in a slidable state in a radial direction, a spring biasing the check valve toward a closed position thereof, and a cap member supporting the spring and limiting a distance of a sliding movement of the check valve.

Abstract: A wheel hub clutching mechanism includes an internally splined body, and a clutch ring which is adapted to be meshed with a shaft driven pinion and is resiliently connected by means of a connecting spring to a follower which, in turn, is controlled by means of a rotatable cam. The follower and the clutch ring are biased toward the locked positions thereof by means of a compression spring when the cam is rotated to its locked position by means of a manually operated handle, and the clutch ring is retracted to the free position thereof together with the follower when the cam is rotated to its free position by means of the handle. A pinion supporting member is also interposed between the shaft driven pinion and the body, the splines of the body being formed so as to be substantially parallel to the shaft axis.

Abstract: A power distributing apparatus for vehicles includes an input shaft, first and second output shafts, a simple planetary gear set having a carrier operatively connected to the input shaft, a ring gear cooperating with the first output shaft, and a sun gear selectively engaged with the second output shaft, and means for selectively engaging the carrier and the sun gear and for integrally rotating the sun gear and the carrier in the engaging state of the sun gear and the carrier, and for more slowly rotating the sun gear than the carrier in the disengaging state of the sun gear and the carrier.