Abstract: The present invention provides a steering apparatus which has increased rigidity in a fixed state of the steering column after positioning performed by tilt and telescopic adjustment, and in which a play is inhibited and operation feeling of steering is improved. The steering apparatus includes a fixed bracket, an outer column, an arm unit, an inner column, a steering shaft, and a tightening tool. The outer column is constituted by a main holding body portion, a divided portion, and a tightening portion. The arm unit is constituted by a bifurcated arm portion that extends axially outward in a substantially bifurcated shape at the axial front side of the main holding body portion and a linking portion formed between the arms of the bifurcated arm portion. The inner column is held by the outer column. The steering shaft is pivotally supported by the linking portion.

Abstract: To provide a steering device for tilt and telescopic adjustments in which the locked condition can be made stronger, and when unlocked, tilt and telescopic adjustment can be smoothly carried out. A steering device, comprising: a fixed bracket having fixed side parts on both sides in the width direction; a movable bracket arranged between the fixed side parts; a friction plate fixed and oppositely arranged with a suitable gap with respect to at least one of the two fixed side parts of the fixed bracket; and a friction washer that is inserted between the fixed side part and the friction plate. A lock bolt passes through for connecting the fixed bracket, the movable bracket, the friction plate, and the friction washer to be freely locked and unlocked.

Abstract: To provide a rotor apparatus of a pump in which pressure release in the air gap between an oil seal and an inner rotor is conducted smoothly and good durability and sealing ability of the oil seal is maintained and which has a very simple structure and allows the increase in size to be avoided. The rotor apparatus of a pump includes a drive shaft in which a plurality of arcuate circumferential surface sections centering on an axial center and a plurality of flat surface sections are disposed alternately, and an inner rotor having a mounting hole into which the drive shaft is inserted. In the mounting hole, arcuate inner peripheral sections corresponding and equal in number to the arcuate circumferential surface sections and flat surface inner peripheral sections corresponding and equal in number to the flat surface sections are formed alternately.

Abstract: To provide a fixing device for a steering device capable of tilt adjustment and having a very simple cam structure. The fixing device includes a fixed bracket; a movable bracket; a lock bolt that passes through the fixed bracket and the movable bracket; a main drive cam, through which the lock bolt passes, and that is fitted to rotate freely; and a driven cam, through which the lock bolt passes, and that is fitted unrotatably. Cam operation parts are formed on the main drive cam and the driven cam respectively. Cam operation parts on both sides are always in contact with the other side while the main drive cam and the driven cam separate and come close in the axial direction, and the diameter of the driven cam is larger than the diameter of the main drive cam.

Abstract: To provide a relief valve structure for an oil pump, which is capable of appropriately controlling/switching the discharge pressure and flow rate of oil to an optimum condition in low, middle and high speed regions of an engine. The relief valve structure has: a relief valve having formed therein a valve flow path for communicating between a valve head part and an outer circumferential side part; a valve housing in which a valve passage accommodating the relief valve is formed; a relief flow-in part formed on an axial direction one end side of the valve passage and communicating with the valve passage; a first discharge part formed in the valve housing and communicating with the valve flow path by the movement of the relief valve; and a second discharge part that is opened by allowing the valve head part to pass therethrough. The second discharge part is positioned nearer to the relief flow-in part than the first discharge part.

Abstract: To provide an internal gear pump capable of preventing small vibrations due to pressure differences at the outlet port side of a crescent disposed between the outer rotor and the inner rotor, so that fatigue failure does not occur in the crescent over a long time period, whereby the durability can be increased. The internal gear pump includes a rotor unit, in which an inner rotor is disposed within an outer rotor on the inner peripheral side and a crescent is disposed in the gap between the inner rotor and the outer rotor, the rotor unit being housed in a pump casing. Outer cells are formed by the crescent and the outer rotor. Inner cells are formed by the crescent and the inner rotor. Linking of the outer cells and the outlet port, and linking of the inner cells 6 and the outlet port, start substantially simultaneously.

Abstract: To provide a steering device from which good operation feeling can be obtained in tilt and telescoping adjustments, and whose configuration is very simple. The cylindrical part formed in a pair of shock absorber members is inserted in the two end openings of an axial through hole formed in the axial direction of a collar member, flanges of the shock absorber members are slidably inserted into adjustment elongated holes formed on both sides in the width direction of a movable bracket, the movable bracket is arranged between fixed support side plates formed on both sides in the width direction of a fixed bracket. A bolt is passed through adjustment holes formed in the fixed support side plates, the adjustment elongated holes, the collar member, and the shock absorber members to be freely tightened as required.

Abstract: A cooling device for an engine that can raise the temperature of cooling water within a short period of time during the warm-up operation and allows a simple structure. The cooling device has a radiator circulation flow channel for circulation via an engine, a radiator, and a thermostat; a heater circulation flow channel for circulation via the engine, a heater core, and the thermostat; a bypass circulation flow channel for circulation via the engine and the thermostat; an electronically controlled valve; and a pump. The radiator circulation flow channel, heater circulation flow channel, and bypass circulation flow channel merge in the thermostat and form a common flow channel between the thermostat and the engine. The pump is provided in the common flow channel.

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 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 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: 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: 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: A trochoid oil pump, which enables the endurance to be increased and the reduction of discharge pulsations and noise to be achieved, and in which those results can be realized with a very simple structure. An interdental space constituted by an inner rotor and an outer rotor having trochoid tooth profile or substantially trochoid tooth profile starts a compression stroke in the location of a partition section between an intake port and a discharge portion, and a linking gap L is composed by the interdental space and a preceding adjacent interdental space realized in a discharge stroke. The linking gap expands gradually from the start of compression stroke to the discharge stroke.

Abstract: An internal gear pump which has a crescent disposed between an outer rotor and an inner rotor having a trochoidal tooth profile, and which reduces vibrations caused by pulsations generated when the fluid is discharged. The internal gear pump has an outer rotor having internal teeth formed therein, an inner rotor disposed on the inner peripheral side of the outer rotor and having formed therein external teeth that mesh with the internal teeth, and a crescent disposed in a clearance between the outer rotor and the inner rotor. Pitch spacings of the external teeth of the inner rotor are formed as non-equal spacings, and pitch spacings of the internal teeth of the outer rotor correspond to the pitch spacings of the external teeth of the inner rotor.

Abstract: A steering wheel position adjustment device in a steering device includes a tilt telescopic adjustment mechanism. A column housing, through which a column pipe passes and is fixed thereto, is fitted to a fixed bracket so that the column housing can either freely move or be fixed in the axial direction. The column pipe is inserted slidably in an insertion hole of a pivot housing that is fitted to be able to swing freely and be fixed to the front of the column housing in the axial direction. An upper shaft is provided, within the column pipe, that moves together with the column pipe in the axial direction. A lower shaft is provided in the pivot housing. The upper shaft transmits rotation to the lower shaft, and the upper shaft and the lower shaft are connected to be able to slide freely relative to each other.

Abstract: A tilt steering apparatus comprises a tilt adjusting mechanism in which a tilt lock release is established only when an oscillation-free end of an operating arm portion of a tilt operating lever is positioned toward a steering wheel side. Even when the tilt operating lever is oscillated to the steering wheel side, the tilt operating lever is prevented from returning under its own weight, thereby preventing it from being difficult to operate. The tilt steering apparatus is configured from an oscillation latch portion formed on the circumference of an oscillation center portion of an oscillation base portion of the tilt operating lever to move reciprocally in the circumferential direction, a hook portion formed in the movable bracket, and a spring that extends between the oscillation latch portion and the hook portion elastically urged in the direction of contraction. The centerline of the spring is able to pass through the oscillation center portion of the tilt operating lever as appropriate.

Abstract: A device for reducing friction in a variable flow rate oil pump in which two discharge ports are provided and which uses three rotors while maintaining characteristics identical to the pressure characteristics of a common oil pump. The device is configured from a first discharge passage to an engine, a return passage that returns to an intake side of an outer circumferential side rotor, a second discharge passage to the engine, a return passage that returns to an intake side of an inner circumferential side rotor, and a pressure control valve whose valve main body is provided between a discharge port from the inner circumferential side rotor and the first discharge passage.

Abstract: The present invention provides an oil pump in which eroding of the inside of the pump due to cavitation and erosion is prevented by minimizing the pressure change in a fluid when inter-tooth spaces formed by an inner rotor and an outer rotor transport the fluid from the intake port to the discharge port. The oil pump comprises: an inner rotor; an outer rotor; an intake port; a discharge port; a transfer side partition part formed between a terminal end of the intake port and a leading end of the discharge port; and a shallow groove which is formed in the transfer side partition part, and which communicates with the discharge port but does not communicate with the intake port. The shallow groove does not intersect with the cell on the transfer side partition part, and is positioned farther inward than the circular locus of the gear bottom parts of the inner rotor.