Abstract: A hydraulic power transmission joint provided with a rotary valve in which a first enclosing hole is bored and moreover, a first spool valve, a first spring, a first pin member and a first communicating hole are provided. Further, a second communicating hole is also provided therein in such a manner as to be coaxial with the first communication hole. Moreover, a second enclosing hole having a smaller diameter is bored therein. Furthermore, a second spool valve having a diameter smaller than that of the first spool valve, a second spring, a second pin member, a third communicating hole, a fourth communicating hole and an orifice are provided therein. Further, a valve element, whose position is controlled, is enclosed in a high-pressure chamber formed in the rotary valve.

Abstract: A shift fork used in a transmission which engages with an engaging groove of a coupling sleeve of the transmission, comprises a fork main body and an engaging part integrally molded therewith. The engaging part has an engaging surface which comes in contact with a coupling sleeve, and the engaging surface is formed in a bulging shape by high precision aluminum diecasting.

Abstract: A hydraulic power transmission joint provided with a rotary valve in which a first enclosing hole is bored and moreover, a first spool valve, a first spring, a first pin member and a first communicating hole are provided. Further, a second communicating hole is also provided therein in such a manner as to be coaxial with the first communication hole. Moreover, a second enclosing hole having a smaller diameter is bored therein. Furthermore, a second spool valve having a diameter smaller than that of the first spool valve, a second spring, a second pin member, a third communicating hole, a fourth communicating hole and an orifice are provided therein. Further, a valve element, whose position is controlled, is enclosed in a high-pressure chamber formed in the rotary valve.

Abstract: When an assembly in which a sprag is temporarily assembled to a retainer by a return spring is assembled between an outer race and an inner race, even if the sprag projecting from the retainer is depressed, a drop-out of the sprag is prevented by a retaining member of a friction plate fixed to the end portion of the retainer. A lubrication passage is formed by opening a space surrounded by the outer race, retainer, and sprag to the outer peripheral side. An attaching member of the friction plate which is fixed to the retainer by a spot welding is recessed backward by joggling in a downward stairway manner for a contact surface. Therefore, even if a rise occurs in the attaching member by the welding, the rise is not come into contact with the contact surface.

Abstract: In the state where a tire valve cap body has been fixedly screwed onto a valve mouthpiece, a top cover is pushed to open a tire valve, allowing introduction of a tire air pressure. A piston is slidably incorporated in a cylinder chamber defined within the top cover and is urged by a return spring. Upon the introduction of the tire air pressure, the piston is displaced to a position at which the biasing force of the return spring balances with the force of the introduced air pressure. An indication mechanism is provided to indicate, through an indication window formed in a cylinder member, a position of the piston member displaced by the tire air pressure introduced, thereby indicating a measurement value of the tire air pressure.

Abstract: A hydraulic power transmission joint provided with a rotary valve in which a first enclosing hole is bored and moreover, a first spool valve, a first spring, a first pin member and a first communicating hole are provided. Further, a second communicating hole is also provided therein in such a manner as to be coaxial with the first communication hole. Moreover, a second enclosing hole having a smaller diameter is bored therein. Furthermore, a second spool valve having a diameter smaller than that of the first spool valve, a second spring, a second pin member, a third communicating hole, a fourth communicating hole and an orifice are provided therein. Further, a valve element, whose position is controlled, is enclosed in a high-pressure chamber formed in the rotary valve.

Abstract: A power transfer system which distributes a power of the engine to front and rear wheels in a vehicle. The power transfer system comprises a first input shaft whose one end portion is in butt connection with an input shaft from an engine and whose other end portion is supported to a ball bearing fixed to a housing. A friction clutch is installed to the first input shaft such that the power to the first output shaft is transferred to a second output shaft through an endless chain according to the engagement of the friction clutch. A ring groove is formed at an outer peripheral portion of the first output shaft, and a ring member is installed to the ring groove so as to be in contact with a side surface of the ball bearing. Therefore, a thrust load applied to the first output shaft due to the operation of the friction clutch is securely received by the ball bearing through the ring member.

Abstract: A lubricating device lubricates various parts of a power transfer system for a vehicle. The lubricating device comprises a gear interconnected with an output shaft and splashes lubricating oil in an oil chamber. The splashed oil is received by a cover member and supplied to a passage for supplying the lubricating oil to a bushing for rotatably supporting an output shaft of the power transfer system. Therefore, even if the direction to which lubricating oil is splashed by the gear is changed according to an operating condition of the vehicle, the cover member securely receives the splashed oil and supplies it to the passage for the bushing.

Abstract: An electromagnetic actuator is provided at the outer periphery of and out of contact with a casing of a transmission joint for transmitting torque between two shafts. The electromagnetic actuator produces an electromagnetic field within the joint main body when an exciting current is supplied to a solenoid coil of the actuator. A movable magnetic ring is provided in the casing so as to be movable in the axial direction. The ring is moved in the axial direction by receiving an electromagnetic force induced by the field produced by the electromagnetic actuator. A relief valve connected to the ring is moved over an orifice of a pump, and a spring biasing the relief valve is compressed due to such movement, thereby establishing a relief pressure.

Abstract: The rotational speed of a motor is reduced by a worm gear and a worm wheel and the reduced rotation is transferred to a first pinion gear. A first moving plate is moved along a pair of shafts. A second moving plate is provided for the first moving plate by inserting to the same pair of shafts. A first coil spring is interposed between a retaining portion of a shaft inserting hole of the first moving plate of one of the shafts and a retaining portion of a shaft inserting hole of the second moving plate. The first coil spring is compressed by the movement of the first moving plate upon switching to the 4-wheel drive, thereby accumulating the force. A second coil spring is interposed between a retaining portion of the shaft inserting hole of the first moving plate of the other shaft and a retaining portion of the shaft inserting hole of the second moving plate. The second coil spring is compressed by the movement of the first moving plate upon switching to the 2-wheel drive, thereby accumulating the force.