Patent application number | Description | Published |
20080308758 | SOLENOID VALVE - A movable iron core unit includes a movable iron core, which is attracted toward a fixed iron core under excitation of a coil, and a guide member made from a resin material and mounted on an outer circumferential side of the movable iron core. The guide member is constructed from a pair of ring members and connecting members that interconnect the ring members. The ring members and the connecting members are mounted in mounting grooves, which are formed on an outer circumferential surface of the movable iron core, and project only slightly from the outer circumferential surface. | 12-18-2008 |
20090015979 | SOLENOID VALVE DRIVING CIRCUIT AND SOLENOID VALVE - A current detection circuit generates a pulse signal Sd based on a voltage Vd corresponding to a current I flowing through a solenoid coil, and feeds the pulse signal Sd back to a PWM circuit of a switch controller. The PWM circuit generates a pulse signal Sr having a predetermined duty ratio, based on a comparison between the fed back pulse signal Sd and a voltage value corresponding to a first current value or a second current value, and supplies the pulse signal Sr to a pulse supplying unit. The pulse supplying unit supplies the pulse signal Sr as a first pulse signal S | 01-15-2009 |
20090015980 | SOLENOID VALVE DRIVING CIRCUIT AND SOLENOID VALVE - A current detection circuit generates a pulse signal Sd based on a voltage Vd corresponding to a current I flowing through a solenoid coil, and feeds the pulse signal Sd back to a PWM circuit of a switch controller. The PWM circuit generates a pulse signal Sr having a predetermined duty ratio, based on a comparison between the fed back pulse signal Sd and a voltage value corresponding to a first current value or a second current value, and supplies the pulse signal Sr to a pulse supplying unit. The pulse supplying unit supplies the pulse signal Sr as a first pulse signal S | 01-15-2009 |
20090032125 | VACUUM GENERATING UNIT - An ejector functioning as a vacuum generating mechanism is disposed in a main body constituting a vacuum generating unit, and an atmospheric air introducing valve is disposed between the ejector and a vacuum port. The atmospheric air introducing valve is brought into a valve closed state at times when a negative pressure is generated by the ejector under a condition in which a workpiece is held by the negative pressure generated by the ejector, whereby communication between the vacuum port and the atmosphere is blocked. On the other hand, at times when the vacuum is broken, in which the negative pressure state of the vacuum port is released, the atmospheric air introducing valve is brought into a valve open state, whereby the vacuum port communicates with the atmosphere. | 02-05-2009 |
20090121590 | SERVO MOTOR - A servo motor is equipped with a rotary shaft, a rotor rotated integrally with the rotary shaft, a stator that is separated a predetermined distance from and disposed in confronting relation to the rotor, and an angle detecting device that detects an angle of rotation of the rotary shaft. On a counter-load side end, which is opposite to a load side end of the rotary shaft, an operating member is provided, which enables the rotary shaft to be rotated manually from an exterior location. | 05-14-2009 |
20090133524 | DRIVE MECHANISM AND GRIPPER MECHANISM EQUIPPED WITH DRIVE MECHANISM - A drive mechanism and a gripper mechanism equipped with the drive mechanism are provided. An electrical gripper includes a drive mechanism equipped with a motor, a feed screw that transmits a rotary drive force from the motor to a feed nut capable of displacement in an axial direction, and a gripper section that grips a workpiece by coupling to the feed nut and being displaced thereby. The drive mechanism further is constituted by a self-locking mechanism, which prevents the feed nut from being retracted as a result of a reactive force received in the event that the feed nut is advanced and the workpiece is gripped by the gripper section. | 05-28-2009 |
20090140586 | ELECTRIC ACTUATOR - In an electric actuator, a first bore portion in which a driving section is accommodated, and a second bore portion that extends in parallel with the first bore portion and in which a feed screw of a drive force transmission mechanism is inserted, are provided in the interior of an elongate body. Further, a rotary drive source of the driving section and the feed screw are connected through the drive force transmission mechanism. In addition, a drive force of the rotary drive source is transmitted to the feed screw through the drive force transmission mechanism for displacing a slider disposed on an upper portion of the body along an axial direction. | 06-04-2009 |
20090260463 | ELECTRIC ACTUATOR - In an electric actuator, a connector is coupled to one end of a screw shaft that makes up a displacement mechanism, the screw shaft being rotatably supported by first and second bearings. Further, on the other end of the screw shaft, a support ring is disposed through a holder, wherein the support ring is slidable along an inner circumferential surface of a piston rod. On the outer circumferential surface of a piston, a rotation-stopping member is provided, which includes projections thereon that project in a radial direction from the outer circumferential surface, the projections being inserted into grooves of said body. | 10-22-2009 |
20090270220 | AUTOMATIC SPEED REDUCTION RATIO SWITCHING APPARATUS - An automatic speed reduction ratio switching apparatus is equipped with a sun gear connected to an input shaft, first and second carriers connected to a feed screw shaft, planetary gears meshed with the sun gear and which are mounted rotatably in the first and second carriers, and an internal gear meshed with the planetary gears and which is capable of movement in an axial direction. A packing member is arranged between the internal gear and the second carrier, for regulating movement in the axial direction of the internal gear, while enabling movement of the internal gear in the axial direction when a thrust force is applied at or above a predetermined value. | 10-29-2009 |
20100043583 | BALL SCREW MECHANISM - A ball screw mechanism is equipped with a ball screw shaft formed from a metallic material, a displacement nut inserted over an outer circumferential side of the ball screw shaft, steel balls installed between a first screw groove formed on the ball screw shaft and a second screw groove formed in the displacement nut, and a pair of first and second return members, through which the steel balls are circulated between one end side and another end side of the displacement nut. The first and second return members include main body parts mounted respectively onto one end and another end of the displacement nut, and cylindrical parts that project outwardly with respect to the main body parts. A return passage, through which the steel balls are circulated, is formed inside of the main body parts and the cylindrical parts. | 02-25-2010 |
20100272589 | PUMP APPARATUS - In a constant rate discharge pump, a rotary drive source is disposed on an end of a housing, and on the other end of the housing, a pump head is provided, having a pump chamber into which a fluid is drawn, and a filling chamber filled with an indirect medium. Further, a displacement mechanism having a displacement nut which is displaced under a driving action of the rotary drive source is disposed in the interior of the housing. A bellows is interposed between a tubular body connected to the displacement nut and a first block of the pump head, wherein the interior of the bellows also is filled with the indirect medium, which is made up from an incompressible fluid. Furthermore, a flexible diaphragm is disposed in the pump head between the fluid and the indirect medium. | 10-28-2010 |
20110113955 | ACTUATOR - An actuator is equipped with a cylinder body in the interior of which a piston is disposed for displacement therein. A piston rod connected to the piston projects outwardly to the exterior from an end of the cylinder body. A guide unit, having a guide body that is attached to the cylinder body, and a pair of guide rods, which are disposed displaceably with respect to the guide body, are disposed detachably on the cylinder body. Additionally, by mutually interconnecting the guide rods of the guide unit and the piston rod through a connecting plate, when the piston rod is displaced in an axial direction, the piston rod is guided by the pair of guide rods. | 05-19-2011 |
20110174100 | FEED SCREW MECHANISM - A feed screw mechanism includes a feed screw shaft connected to a drive source and formed with first screw threads on an outer circumferential surface thereof, and a displacement nut, which is screw-engaged with respect to the feed screw shaft through a plurality of balls. The displacement nut is supported with respect to a slider that makes up an electric actuator by a pair of pins. The pins are inserted and fixed in first pin holes formed in the slider, and distal end portions of the pins are inserted respectively into second pin holes formed in the displacement nut. | 07-21-2011 |
20110214741 | SOLENOID VALVE DRIVING CIRCUIT, SOLENOID VALVE, AND SOLENOID VALVE DRIVING METHOD - A solenoid valve driving circuit for a solenoid valve includes a current detector for detecting a current that flows in a solenoid coil, a rate of change over time calculating unit for calculating a rate of change over time of the detected current, and a maintaining state transition determining unit for determining a timing at which transition from a first period to a second period occurs based on the calculated rate of change over time. | 09-08-2011 |
20120107155 | SOLENOID PUMP - A solenoid pump is equipped with a housing formed therein with a fluid passage through which a fluid flows from an inlet port to an outlet port, and a movable member, which is displaced based on an excitation state of a solenoid section, for thereby opening and closing the fluid passage. The fluid passage includes an inlet side passage that communicates with the inlet port, an outlet side passage that communicates with the outlet port, and a pump chamber made up of a space in communication with the inlet side passage and the outlet side passage, and surrounded by the housing and an end portion of the movable member. Accompanying displacement thereof, the movable member opens and closes communication between the pump chamber and the outlet side passage. | 05-03-2012 |
20120256433 | SUCTION APPARATUS EQUIPPED WITH EJECTOR - A retaining stud is inserted from a bottom portion of a suction pad that constitutes part of an ejector equipped suction apparatus, and an end of the retaining stud is inserted into an adapter plate. Further, a small diameter portion of a lock plate engages with a lock plate groove, which is exposed externally on the retaining stud, whereby the retaining stud and the lock plate are connected together integrally. In addition, an ejector is fixed using a side wall portion of the adapter plate. A mounting bracket is attached to the adapter plate while covering the lock plate, and a transfer means such as a robot arm or the like is fixed to the mounting bracket using a bolt. | 10-11-2012 |
20130082475 | VACUUM SUCTION APPARATUS - A vacuum suction apparatus is equipped with a body having a supply port, and a pad provided on a lower portion of the body to which a workpiece can be attracted under suction. The pad is constituted from a base plate accommodated in a space of the body, a flexible intermediate plate provided on a lower portion of the base plate, and a suction sheet body disposed on a lower portion of the intermediate plate and having a sheet that attracts the workpiece under suction. In addition, the base plate, the intermediate plate and the suction sheet body are stacked along an axial direction of the body. The rigidity of the base plate is highest, whereas the rigidities of the intermediate plate and the suction sheet body are lower in this order, and the flexibilities thereof are greater in this order from the base plate. | 04-04-2013 |
20130099146 | SOLENOID VALVE - A solenoid valve. In a solenoid section forming part of the solenoid valve, a sleeve is provided on the inner circumferential side of a bobbin around which a coil is wound. This sleeve is formed from magnetic material and includes a cylindrical section and a flange section formed at a lower end of the cylindrical section. At an upper end of the cylindrical section, a tapered section is formed in which an outer circumferential face is recessed in the radially inward direction. The tapered section is arranged facing and in close contact with the outer circumferential face of a fixed core such that the magnetic flux density in the tapered section increases when the solenoid section is excited. | 04-25-2013 |
20130112302 | CHECK VALVE - A check valve includes a first body disposed on an upstream side, and a second body disposed on a downstream side and being connected to the first body. A valve plug is disposed displaceably in a communication chamber formed in the interior of the first body. A skirt, which urges a main body portion of the valve plug in a direction for seating the main body portion on a valve seat surface, is provided on the valve plug, such that the main body portion is seated on the valve seat surface by an elastic force of the skirt. In addition, by supplying a pressure fluid to the first body, the valve plug is displaced in opposition to the elastic force of the skirt, whereby the interior of the first body and the interior of the second body are placed in communication and the pressure fluid is allowed to flow there through. | 05-09-2013 |
20130119284 | PINCH VALVE - A pinch valve includes a spring disposed between a movable iron core of a solenoid and an end cover thereof, and which urges the movable iron core toward the side of a tube provided in a body. An elastic force of the spring is set to be smaller than a reactive force of the tube that is applied to a valve plug. In a non-excited state of the solenoid, the valve plug is pressed toward the solenoid by the reactive force of the tube, so as to enable a fluid to flow through a flow passage of the tube. Conversely, in an excited state of the solenoid, since an attractive force of the movable iron core toward the tube is added to the elastic force of the spring, the valve plug is pressed in opposition to the reactive force of the tube for thereby blocking the flow passage. | 05-16-2013 |
20130147183 | PIPE JOINT - A pipe joint contains a body having a fluid passage in the interior thereof, a tightening cap screw-engaged with an end of the body for connecting a tube thereto, and an indicator ring interposed between a stopper of the body and an end of the tightening cap. The indicator ring is equipped with a flat section and an inclined section, which is inclined with respect to the flat section, and is formed with a smaller diameter than an outer circumferential surface of the tightening cap. When the tightening cap is screw-rotated to thereby connect the tube, as a result of the inclined section being pressed and deformed by movement of the tightening cap, the inclined section projects radially outward with respect to the outer circumferential surface of the tightening cap, whereby a tightened condition is visually confirmed by the outer edge of the indicator ring. | 06-13-2013 |
20130150193 | TOOTH-SKIPPING PREVENTION MECHANISM FOR DRIVING FORCE TRANSMISSION BELT - A tooth-skipping prevention mechanism includes a block, which is inserted displaceably into a first end block in an electric actuator. A cavity having a semicircular shape in cross section is formed in one end of the block facing toward an outer circumferential side of a drive pulley and recessed toward another end side of the block. In addition, the cavity is arranged at a predetermined distance with respect to an outer circumferential surface of a timing belt that is enmeshed with the drive pulley. When the timing belt is moved in a radial outward direction so as to separate away from the drive pulley, movement of the timing belt is restricted, whereby the enmeshed condition of the timing belt and the drive pulley is maintained. | 06-13-2013 |
20130174679 | ELECTRIC ACTUATOR - In a body of an electric actuator, dust collecting pipes are disposed as a pair along an axial direction of a hole portion of the body. The dust collecting pipes are connected respectively to negative pressure supply ports provided in an end block, and include plural first through fifth suction holes separated mutually along an axial direction of the dust collecting pipes. Distances between the first through fifth suction holes are formed so as to become smaller stepwise from one end side of the dust collection pipes, on the side of the negative pressure supply ports, to the other end side thereof. | 07-11-2013 |
20130205907 | PRESSURE DETECTOR - The present invention relates to a pressure detector. In a body that constitutes part of the pressure detector, a through hole is formed, which is directed upwardly from a substantially central portion of a flow passage through which a pressure fluid flows. The through hole communicates with a sensor chamber in which a pressure sensor is disposed, and a rod-shaped member is disposed displaceably in the through hole. In addition, an end of the rod-shaped member, which is exposed to the flow passage, is pressed by the pressure fluid and displaced upwardly thereby, and pressure is detected as a result of the pressure sensor being pressed by a head of the rod-shaped member. | 08-15-2013 |
20130264172 | STOPPER CYLINDER - A stopper cylinder is equipped with a body having a drive unit, a piston mechanism being displaceable along an axial direction in the interior of a tube connected to the body, and a stopper lever connected to the piston mechanism for stopping conveyance of a workpiece. Displacement of the piston mechanism is restricted by an electromagnetic lock mechanism, which is disposed on the body and is excited by supply of electric power. After approaching the workpiece, by releasing a locked state of the electromagnetic lock mechanism, the piston mechanism is displaced to a position facing the workpiece by an elastic force of a spring. | 10-10-2013 |
20130341550 | TWO-WAY VALVE - A two-way valve includes a valve body made of a resilient member and connected to a lower end of a shaft. The valve body is made up from a main body portion having an axial member connected to the shaft, and a thin film skirt portion formed on an outer circumferential side of the main body portion. An outer edge of the skirt portion is sandwiched and gripped between a small diameter part of a housing and a connector of a body. Further, lips that project in a downward direction are formed in a central portion of the main body portion. The lips are seated on a top portion of a partition wall in the body, so that the two-way valve is placed in a valve-closed state. | 12-26-2013 |
20140041434 | PIPE EXPANDING TOOL - A pipe expanding tool includes levers rotatably connected to each other through a rotary shaft, grips disposed on ends of the levers, jaws disposed on other ends of the levers, and mandrels disposed on the jaws. An adjustment screw for adjusting an angle of rotation of the levers, a lock nut for fixing the adjustment screw, and a stopper that restricts rotation of the levers are further provided. | 02-13-2014 |
20140110615 | FLOW PATH OPENING/CLOSING VALVE - A flow path opening/closing valve is equipped with a main body having a valve chamber housing therein a rotatable valve body, and a sleeve that abuts without gaps against an inner circumferential surface of the valve chamber, such that the inner circumferential surface of the valve chamber and an inner circumferential surface of the sleeve slide without gaps against an outer circumferential surface of the valve body, for thereby shielding the valve chamber by the valve body and the sleeve. First and second seat members, and first and second o-rings that urge the first and second seat members toward the side of the valve body are arranged inside first and second annular grooves, which are provided on the inner circumferential surface and the inner circumferential surface. | 04-24-2014 |
20140131597 | VALVE - A valve mechanism, which constitutes a solenoid valve as one example of a valve, includes a valve plug that is displaced in an axial direction under an excitation action of a solenoid unit, and is equipped with a flexible diaphragm disposed between a valve body and an annular groove formed on an outer circumferential surface of the valve plug. The diaphragm is flexible accompanying displacement of the valve plug and includes first through third projections on an inner edge portion thereof. In addition, the first through third projections are capable of coming into abutment, respectively, against an inner circumferential surface, a first wall surface, and a second wall surface of the annular groove. Further, the inner edge portion is inserted in the interior of the annular groove while being movable slightly in the direction of displacement of the valve plug. | 05-15-2014 |
20140298920 | ELECTROMAGNETIC FLOWMETER - An electromagnetic flowmeter includes a yoke of a solenoid unit, which is accommodated in the interior of a body. The yoke is U-shaped in cross section, with a pipe unit including a measurement conduit being arranged in the interior of the yoke. One end portion and another end portion of the measurement conduit are formed with true circular shapes in cross section, whereas an intermediate portion thereof between the one end portion and the other end portion is formed with an oval shape in cross section. On the measurement conduit, cross-sectional straight line portions thereof, which are formed in the intermediate portion, are arranged in a vertical direction. Coils of the solenoid unit and excitation plates are arranged in facing relation to the cross-sectional straight line portions. | 10-09-2014 |
20140299799 | SPOOL VALVE - A spool valve is equipped with a valve body, a spool arranged in a valve chamber such that the spool can be displaced between a first position, which allows communication between an inlet port and an outlet port, and a second position, which blocks communication between the inlet port and the outlet port, a pilot valve mechanism disposed in the valve body and which causes displacement of the spool along an axial direction under the pressure of a pilot fluid that acts on one end surface of the spool, and a spring that biases the spool toward one side in the axial direction. | 10-09-2014 |
20150068323 | VORTEX FLOWMETER - An installation hole, in which a detector is accommodated, is formed in a substantially central portion of a body of a vortex flowmeter. A first ring is formed on an annular wall that forms a boundary between a first aperture portion and a second aperture portion of the installation hole. In the detector, a detecting element made up from a piezoelectric element is accommodated in a holder. A pair of second rings is formed on the outer circumferential surface of the holder. By inserting the detector in the installation hole, the second rings are placed in sliding contact with the inner circumferential surface of the installation hole, and the first ring comes into abutment with a boundary region of the holder. Consequently, a seal is formed between the detector and the body by the first and second rings. | 03-12-2015 |