Abstract: A first valve accommodation hole is provided in a valve housing. A first valve element, a first valve seat member, a first coil spring, and a first pin are directly accommodated and disposed in the first valve accommodation hole. It is thereby possible to reduce the maximum diameter t1 of the first valve accommodation hole, thus reducing the size of a housing main body.

Abstract: A first valve accommodation hole is provided in a valve housing. A first valve element, a first valve seat member, a first coil spring, and a first pin are directly accommodated and disposed in the first valve accommodation hole. It is thereby possible to reduce the maximum diameter t1 of the first valve accommodation hole, thus reducing the size of a housing main body.

Abstract: In a stroke-limiter equipped integral power steering apparatus, a valve body of a spring-loaded-plunger-equipped limiter valve is configured to enable a position of the valve body relative to a housing to be adjusted in a longitudinal direction of the valve body via an intermediate sleeve.

Abstract: A power steering apparatus including a power cylinder, first and second pumps, a control valve serving for selectively supplying a working fluid supplied from the first or second pump to one of a pair of pressure chambers of the power cylinder in accordance with a steering operation, first and second reservoir tanks, and a return passage changeover valve disposed between the control valve and the first and second pumps, the return passage changeover valve serving for communicating the first and second pumps with the control valve regardless of an axial position of a valve element and communicating one of the first and second reservoir tanks with the control valve in accordance with the axial position of the valve element to thereby carry out changeover between circulating fluid passages for circulating the working fluid to the first reservoir tank and the second reservoir tank.

Abstract: An integral power steering apparatus includes a hydraulic actuator having a piston separating pressure chambers for steering assistance and a limiter valve to be opened by movement of the piston to fluidly connect the pressure chambers. The limiter valve includes an adjuster for adjusting a press-fit position of a spring pin press fit in a plunger. The adjuster includes a movable adjusting member formed with an abutting surface to abut against the plunger to limit rearward plunger movement when the movable adjusting member is at a first adjuster position, and a regulating member to hold the movable adjusting member at the first adjuster position at the time of adjustment, and to enable the movable adjusting member to move to a second adjuster position after adjustment.

Abstract: In a stroke-limiter equipped integral power steering apparatus, a valve body of a spring-loaded-plunger-equipped limiter valve is configured to enable a position of the valve body relative to a housing to be adjusted in a longitudinal direction of the valve body via an intermediate sleeve.

Abstract: A power steering apparatus including a power cylinder, first and second pumps, a control valve serving for selectively supplying a working fluid supplied from the first or second pump to one of a pair of pressure chambers of the power cylinder in accordance with a steering operation, first and second reservoir tanks, and a return passage changeover valve disposed between the control valve and the first and second pumps, the return passage changeover valve serving for communicating the first and second pumps with the control valve regardless of an axial position of a valve element and communicating one of the first and second reservoir tanks with the control valve in accordance with the axial position of the valve element to thereby carry out changeover between circulating fluid passages for circulating the working fluid to the first reservoir tank and the second reservoir tank.

Abstract: An integral power steering apparatus includes a hydraulic actuator having a piston separating pressure chambers for steering assistance and a limiter valve to be opened by movement of the piston to fluidly connect the pressure chambers. The limiter valve includes an adjuster for adjusting a press-fit position of a spring pin press fit in a plunger. The adjuster includes a movable adjusting member formed with an abutting surface to abut against the plunger to limit rearward plunger movement when the movable adjusting member is at a first adjuster position, and a regulating member to hold the movable adjusting member at the first adjuster position at the time of adjustment, and to enable the movable adjusting member to move to a second adjuster position after adjustment.

Abstract: A power steering apparatus includes a steering shaft, a hydraulic power cylinder, a hydraulic pump, a steering shaft actuator, a condition sensor, and a fluid pressure controller. The steering shaft is connected to a steering wheel. The hydraulic power cylinder is mechanically linked to the steering shaft. The hydraulic power cylinder has first and second fluid pressure chambers for producing an assist steering effort. The hydraulic pump supplies a first fluid pressure to the hydraulic power cylinder. The steering shaft actuator receives a second fluid pressure from the hydraulic pump, and applies a torque to the steering shaft by the second fluid pressure. The condition sensor collects information concerning at least one of an associated host vehicle, an associated driver and an associated road. The fluid pressure controller receives the collected information from the condition sensor, and controls the steering shaft actuator based on the collected information.

Abstract: A power steering apparatus includes a steering shaft, a hydraulic power cylinder connected to the steering shaft and having first and second hydraulic chambers, a hydraulic pump that discharges a hydraulic pressure to the power cylinder, a control valve that supplies the hydraulic pressure from the pump to the first and second hydraulic chambers selectively in response to a steering operation, a steering shaft actuation unit driven by the hydraulic pressure from the pump to apply a torque to the steering shaft, a detection unit that detects information about a vehicle, driver and/or road, and a hydraulic control unit that supplies the hydraulic pressure from the pump to either of the control valve and the steering shaft actuation unit according to the detected information and, at the supply of the hydraulic pressure to the steering shaft actuation unit, increases the hydraulic pressure supplied to the steering shaft actuation unit.

Abstract: Right-turn and left-turn aimed input shaft drive mechanisms are provided, each comprising a piston unit that slides in a bore formed in an output shaft and a contact surface that is formed on an input shaft. Under normal cruising of a vehicle, a comfortable steering feeling is given by a relatively small counter torque that is produced by a contact between the piston unit and a second inclined surface of the contact surface, and upon stray running of the vehicle due to doze in driving or the like, a relatively large steering torque is produced by a contact between the piston unit and a first inclined surface of the contact surface. An inclination angle of the second inclined surface relative to a traveling path of the piston unit is greater than that of the first inclined surface.

Abstract: A power steering apparatus includes a steering shaft, a hydraulic power cylinder, a hydraulic pump, a steering shaft actuator, a condition sensor, and a fluid pressure controller. The steering shaft is connected to a steering wheel. The hydraulic power cylinder is mechanically linked to the steering shaft. The hydraulic power cylinder has first and second fluid pressure chambers for producing an assist steering effort. The hydraulic pump supplies a first fluid pressure to the hydraulic power cylinder. The steering shaft actuator receives a second fluid pressure from the hydraulic pump, and applies a torque to the steering shaft by the second fluid pressure. The condition sensor collects information concerning at least one of an associated host vehicle, an associated driver and an associated road. The fluid pressure controller receives the collected information from the condition sensor, and controls the steering shaft actuator based on the collected information.

Abstract: A vibrator motor has an armature rotor whose center of mass is off the axis of the shaft thereof. The rotor includes at least three poles each having an winding arm and an arcuate pole blade. All of the blades have an equal length and are disposed angularly evenly about the axis of the shaft so that all of the blade-to-blade spacings are equal. At least one winding arm is angularly out of alignment with the dimensional center of the arcuate blade of the corresponding pole, or, the size and the mass of at least one arm is different from those of any other arms, or, the mass of at least one of armature windings is different from the mass of any other armature winding, or, a weight is fixedly attached to the rotor in an eccentric manner either between two armature poles or on the shaft.