Abstract: An oil pump unit with a variable flow rate includes: an oil pump having an intake port and a discharge port and accommodating a pump rotor; and an oil path switching valve having oil inlets and oil outlets and opening/closing oil pressure return holes communicating with the discharge port, in which the oil path switching valve and the oil pump are separately disposed, the intake port and the discharge port are open to valve-mounting surfaces formed at the oil pump, and oil inlets and the oil outlet are open to body-mounting surfaces matching with the valve-mounting surfaces of the oil path switching valve.

Abstract: A packing material fitting structure that prevents the packing material from easily dropping out and facilitates mounting and fixing of the packing material in a packing material fitting place in a part such as a casing or a cover of an engine or a pump with sealing ability. The fitting structure is provided with a packing material having an annular main body portion and a plurality of projections each having a main protruding portion formed to protrude from the annular main body portion and an auxiliary protruding portion formed integrally in the vicinity of the main protruding portion, the projections being formed with an appropriate spacing in the longitudinal direction of the main annular main body portion. The fitting structure is also provided with a casing having formed therein an annular fitting groove for inserting the annular main body portion of the packing material.

Abstract: The present invention provides an engine cooling apparatus that is capable of suppressing cavitation in a high rotation region while achieving an increase in a circulation flow rate of cooling water in a low/medium rotation region. The engine cooling apparatus includes: a main cooling water circuit that circulates the cooling water between an engine and a radiator; a branch portion provided between the engine and the radiator; a thermostat; temperature detecting means; a first bypass flow passage; a second bypass flow passage that connects the engine to the branch portion; a control valve; a bypass convergence portion; a water pump; valve opening control means; and engine rotation speed detecting means.

Abstract: The invention provides an oil pump resonator in which various vibrations caused by pulsations that change in response to changes in oil pressure on a discharge port side can be attenuated by a resonator that comprises only one chamber, whereby the volume occupied by the resonator can be minimized. An oil pump in an engine, for feeding oil from a suction port to a discharge port through rotation of a rotor fitted in a pump housing, includes: a discharge flow channel communicating with the discharge port; a resonator comprising an introduction channel formed in the discharge flow channel and a chamber communicating with the introduction channel; and a piston having a leading end face section that makes up an inner wall face of the chamber, and reciprocating in response to pulsation changes. The piston slides so as to reduce the volume of the chamber as the frequency distribution of the pulsations becomes higher.

Abstract: A steering wheel position adjustment device includes a movable bracket having adjusting long holes on both sides in a width direction of the movable bracket, a fixed bracket, a lock shaft penetrating through both of the adjusting long holes to support the movable bracket to the fixed bracket, a collar member which is rotatably supported within the movable bracket by the lock shaft and is capable of moving along, with the lock shaft, in a longitudinal direction and stopper shock-absorbing materials, which are attached to both side sections in the longitudinal direction of the adjusting long holes within the movable bracket, and each of which is formed thereon with an abutment surface against which the collar member abuts.

Abstract: In a circuit substrate of an electric water pump, a Hall IC can be mounted on a circuit substrate at an optimum position in a stable and durable state. The electric water pump includes a motor housing, a stator constituted by a stator core covered by a resin insulator and a coil, a circuit substrate, a holder 6 mounted on the circuit substrate, and a Hall IC mounted on the holder. A holder accommodation portion, into which the holder is inserted, is formed in the insulator, the stator is disposed in and fixed to the motor housing, the circuit substrate is appropriately mounted on the motor housing, and the holder 6 is inserted into and supported by the holder accommodation portion.

Abstract: A present invention's object is to maintain a discharge performance by making a discharge flow rate constant in a low rotation region of an engine rotation speed and to reduce the discharge flow rate in a high rotation region. The present invention consists of a housing case, an impeller base provided with plural holes and plural elliptical elongated holes, a vane body provided with a rotary shaft on an inner peripheral side and a rocking shaft on an outer peripheral side, a plate cam in which an elongated groove is formed on an outer peripheral side of a disc portion and a single torsion spring. The spring and the plate cam are housed in the housing case and the impeller base. The rotary shaft is inserted rotatably into the holes, and the rocking shaft is movably inserted into the elliptical elongated holes and the elongated groove.

Abstract: A device including a first discharge passage from a first rotor assembly to an engine, a first return passage that returns to an intake side of the first rotor assembly, a second discharge passage from a second rotor assembly to the engine, a second return passage that returns to an intake side of the second rotor assembly, and a pressure control valve whose valve main body is provided between a discharge port from the second rotor assembly and the first discharge passage. The first discharge passage and the second discharge passage are coupled, and a flow passage control is executed in each of: a low revolution range; an intermediate revolution range; and a high revolution range.

Abstract: The present invention provides an impeller in which a metallic bush can be inserted correctly into a synthetic resin impeller main body manufactured by resin molding using a die, and a determination as to whether or not the impeller has been manufactured correctly can be made easily. The impeller comprises: a metallic bush comprising a circumferential boss portion having a substantially truncated cone-shaped throttle portion positioned on a front surface axial end side, a periaxial support boss portion positioned in an axial center, and a circumferential protruding portion positioned on a back surface axial end side; and an impeller main body made of synthetic resin and formed with a V-shaped bulging portion that bulges axially in the center of a front surface side of a disk-shaped vane portion fulcrum, in which a plurality of vanes are formed integrally on the periphery of the V-shaped bulging portion.

Abstract: A spring for assisting a tilt adjustment operation can be easily and rapidly attached to a fixed bracket and a movable bracket. Each of two flanges of a fixed bracket has a tilted flange plate and a locking piece. The locking piece has a guiding edge, a locking recess, an insertion recess, and a fixing hole. In a spring member, a first locking shaft portion is formed on the rear side of two coil portions, and a second locking shaft portion is formed rearward from the distal end of the first locking shaft portion. The first locking shaft portion is engaged with the locking recess, and the second locking shaft portion is engaged with the fixing hole. The distance between the first locking shaft portions of the spring member is less that the distance between the two guiding edges.

Abstract: Provided is a steering device in which play of a bolt shaft and the like during telescopic adjustment can be prevented using a telescopic adjustment function enabling a driver to adjust a position of a steering wheel in a front-rear direction. The steering device includes a column pipe, an outer housing, a fixed bracket, a stopper bracket, a tightening member having a bolt shaft, a slide guide, an elastic stopper rubber material mounted on the slide guide, and an elastic pushing member in which torsional coil spring portions are formed at both axial ends of a pushing shaft portion. The bolt shaft is passed through a tightening hole of the outer housing and a support hole of the fixed bracket along shaft support portions of the slide guide, and the elastic pushing member is locked and fixed to the fixed bracket.

Abstract: The present invention enables the manufacture of a trochoid pump having a crescent which has been considered theoretically impossible by employing an inner rotor of a trochoid pump. An inner rotor having a predetermined number N of teeth that is equal to or larger than 4 is formed in advance.

Abstract: The present invention enables the manufacture of a trochoid pump having a crescent which has been considered theoretically impossible, by employing an inner rotor of a trochoid pump. An inner rotor having a predetermined number N of teeth that is equal to or larger than 4 is formed in advance.

Abstract: An object of the present invention is to markedly increase the tilt holding force of a tilt telescopic column. A tilt telescopic steering device includes: a fixed bracket 1 fixed to a vehicle; a movable bracket 2 capable of moving relative to the fixed bracket 1; an intermediate bracket 3 which movably supports the movable bracket 2 in an axial direction, is rotatably pivoted on the fixed bracket 1 and is provided with a bearing 301 for rotatably supporting a steering shaft 101; a lock shaft 4 for tiltably and telescopicably fixing the fixed bracket 1 and the movable bracket 2 at a predetermined position; and a connecting shaft 5 for telescopicably fixing the movable bracket 2 and the intermediate bracket 3.

Abstract: The present invention provides a manufacturing method for an impeller with which molding and high-quality finishing can be performed extremely easily and quickly through resin molding using a die, and an impeller manufactured by the impeller manufacturing method. A metallic bush is disposed in a die, whereupon a resin material is injected through a gate in the die. A connecting portion between an unnecessary resin portion formed from residual resin material in the gate and a resin impeller main body molded around the bush is formed to be thin, and the unnecessary resin portion is removed from the impeller main body using pushing or withdrawing means.

Abstract: The present invention provides a device for correcting an unbalance of a propeller shaft, specifically an unbalance correction device of a propeller shaft capable of securing a considerable amount of correction, reducing the generation of noise and the like, and preventing the adverse effect of welding heat caused by welding and fixing the balance weight from exerting on a vibration absorbing rubber member. The unbalance correction device of a propeller shaft is configured from a propeller shaft to which a damper is mounted, and a balance weight in which a primary weight plate part and an auxiliary weight plate part are formed continuously and integrally along a longitudinal direction, and a protruding piece is protrusively formed on a concave arced surface on a rear surface side of the primary weight plate part and from each corner part at four locations.

Abstract: The present invention provides a water pump capable of minimizing the runout of a shaft of an impeller even if a bearing supporting the shaft is provided only at one location. This water pump includes a pump cover, a motor case having a partition wall part, an impeller that is rotatably housed in a pump chamber, a shaft, a radial bearing, a rotor base formed with a shaft connecting part to which the shaft is press-fitted and fixed, an inner magnet that is fixed to an outer periphery of the rotor base, and a stator core mounted in the motor case. A substantially cylindrical bearing housing part is formed in partition wall part, the radial bearing is inserted and fixed to the bearing housing part, the radial bearing is disposed in the rotor base, and an axial direction overall length of the radial bearing is positioned within a substantial area of an axial direction overall length of the inner magnet.

Abstract: An oil pump in which pulsation vibration due to the dynamic pressure on the discharge port side can be attenuated. In an oil pump for transporting fluid from a suction port to a discharge port by the rotation of a rotor mounted in a pump casing, a resonator configured from an introduction path and a chamber is formed with respect to a discharge flow channel that communicates with the discharge port in the flow direction of the discharge flow channel. A channel in a direction different to the flow direction of the discharge flow channel is communicatingly formed in the vicinity of the resonator.

Abstract: The present invention provides a steering apparatus that can provide good operation feeling in telescopic adjustment and can have a very simple configuration. The steering apparatus has a fixed bracket, a movable bracket, a sliding shaft support member, and a tightening tool. The sliding shaft support member is constituted by a main sliding unit made of an inelastic resin and buffer portions made of a rubber or an elastic resin. The buffer portions are fixedly attached to both sides of the main sliding unit in the front-rear direction, the upper and lower surfaces of the main sliding unit are in a state of sliding contact with both guide edges of a long hole for telescopic adjustment of the movable bracket, and the buffer portions can abut only on both stop end edges and do not come into contact with the two guide edges.

Abstract: The present invention provides a method for manufacturing a closed impeller that has a simple configuration and enables fusion in a very accurate position. The method includes: forming a frustum-shaped front plate and a disk-shaped base plate formed therebelow, upper surfaces of a plurality of unit impeller blade plates made from a synthetic resin extending in radial directions which are formed as impeller blade tip surfaces, with sharp-pointed ridge-like protrusions having an acute upper end and a width less than a width of the impeller blade tip surface being integrally formed on the impeller blade tip surfaces. In the method, an inner surface of the front plate and the plurality of impeller blade tip surfaces are formed as parts of conical surfaces and formed so that the cone apex angles of the two conical surfaces are equal to each other.