Abstract: A clutch drum is engaged to the rear part of a carrier of a center differential device. A clutch piston, which is rotated together with the rear drive shaft while allowing it to retractively move in a direction along a rear drive shaft, is provided within the clutch drum. Pinion shafts are protruded from the rear end face of the carrier to form protruded parts, which are confronted with the front end face of the clutch piston. A cam part, which is in sliding contact with the protruded parts, is formed on the front end of the clutch piston. When the carrier and the rear drive shaft relatively rotate, the protruded parts retractively move the clutch piston along cam crests of the cam part to press a clutch mechanism.

Abstract: A sliding surface is formed on an inner periphery of a drum member secured to a rear output shaft of a differential limiting device. There is provided a cam member between a projection and the sliding surface. The cam member has a friction surface slidable on the sliding surface and a V-shaped groove engageable with the projection. When a relative rotation occurs between the drum member and the carrier, the position where the projection is engaged with the V-shaped groove deviates so as to press the cam member toward the sliding surface. As a result, due to a frictional resistance of the friction surface against the sliding surface, first a differential limiting occurs between the drum member and the carrier and then a differential is locked up by a wedge effect of a corner edge of the cam member.

Abstract: In a twin shaft type transmission having an input shaft and a counter shaft, a planetary gear type center differential coaxially provided with the counter shaft comprises a hollow center differential input shaft connected coaxially with the counter shaft for inputting power to said center differential, a first sun gear mounted on the center differential input shaft, a second sun gear provided coaxially with the first sun gear for outputting power to a rear drive shaft, a first pinion meshing with the first sun gear, a second pinion formed integrally with the first pinion and meshing with the second sun gear, a carrier rotatably holding the first and second pinions for outputting power to a front drive shaft, and a hub secured to the inside of the carrier and extending through a space between the first and second sun gears to the inside of the center differential input shaft and connected with the front drive shaft.

Abstract: In a pressure type differential limiting clutch, a drive plate and a driven plate provided between a clutch drum for transmitting a driving force to a front drive shaft and a clutch hub for transmitting the driving force to a rear drive shaft are pressed by a pressure force of a cone disk spring provided in a pressure plate, and an initial torque by the cone disk spring acts as the differential limiting torque. At a high speed, a weight in limiter device is moved in a radius direction by a centrifugal force through rotation of the rear drive shaft, enters between cam surfaces formed on the pressure plate and the clutch hub, and pushes and broadens. As a result, the pressure plate 65 moves back against energizing force of the cone disk spring, and the initial torque is cancelled.

Abstract: A fluid operated multiple-disk friction clutch has a drive drum, a driven drum co-axial with the drive drum, a hydraulic piston provided in an oil chamber. The piston is moved by oil pressure to engage disks so as to engage the clutch. A pair of annular cam plates are provided to form an annular space adjacent the piston. One of the annular cam plates has a tapered surface. A plurality of fall weights are provided in the space. The tapered surface acts to provide an axial component from centrifugal force in the weights, so as to push the piston in the clutch disengagement direction.

Abstract: Cobalt, nickel and/or radioactive cobalt are separated from an alloy containing elements belonging to the iron group or family in such a manner that the alloy is melted in a molten bath of tin, lead and/or an alloy thereof whose weight is more than ten times as heavy as the alloy and then silicon is added to the molten bath so that a Fe-Si phase floats up and is separated, concentrating the cobalt and nickel in said bath.