Abstract: The present invention relates to a switching valve device used for vacuum suction of a member such as a semiconductor chip, and the object thereof is to break a vacuum rapidly and smoothly. The switching valve device includes a vacuum suction switching valve function for vacuum suction, a vacuum break switching valve function for vacuum break, and an open-to-atmosphere switching valve function which in conjunction with an operation of the vacuum suction switching valve function, opens a passage to the atmosphere side when the vacuum suction switching valve function is off and closes the passage to the atmosphere side when the vacuum suction switching valve function is on. The vacuum suction switching valve function, the vacuum break switching valve function, and the open-to-atmosphere switching valve function are integrally incorporated into a body portion.

Abstract: A lightweight, low cost throttle body and throttle valve placed in the body, both formed of resins, that resolve the problem of excessively large gap formation is disclosed. Circumferentially oriented filler contained in a resin forming a throttle valve compensates to make the radial linear expansion coefficient of the throttle valve substantially equal to that of a bore. Grooves are formed on concentric circles in the throttle valve to orient filler circumferentially. A throttle valve provided with circumferentially oriented filler can be formed by impregnating an aggregate formed by circumferentially arranging the filler with a resin and curing the resin. A rib is formed in a part near a throttle shaft to control molding shrinkage so that the roundness of the bore is small.

Abstract: The present invention relates to a switching valve device used for vacuum suction of a member such as a semiconductor chip, and the object thereof is to break a vacuum rapidly and smoothly. The switching valve device includes a vacuum suction switching valve function for vacuum suction, a vacuum break switching valve function for vacuum break, and an open-to-atmosphere switching valve function which in conjunction with an operation of the vacuum suction switching valve function, opens a passage to the atmosphere side when the vacuum suction switching valve function is off and closes the passage to the atmosphere side when the vacuum suction switching valve function is on. The vacuum suction switching valve function, the vacuum break switching valve function, and the open-to-atmosphere switching valve function are integrally incorporated into a body portion.

Abstract: A lightweight, low cost throttle body and throttle valve placed in the body, both formed of resins, that resolve the problem of excessively large gap formation is disclosed. Circumferentially oriented filler contained in a resin forming a throttle valve compensates to make the radial linear expansion coefficient of the throttle valve substantially equal to that of a bore. Grooves are formed on concentric circles in the throttle valve to orient filler circumferentially. A throttle valve provided with circumferentially oriented filler can be formed by impregnating an aggregate formed by circumferentially arranging the filler with a resin and curing the resin. A rib is formed in a part near a throttle shaft to control molding shrinkage so that the roundness of the bore is small.

Abstract: A lightweight, low cost throttle body and throttle valve placed in the body, both formed of resins, that resolve the problem of excessively large gap formation is disclosed. Circumferentially oriented filler contained in a resin forming a throttle valve compensates to make the radial linear expansion coefficient of the throttle valve substantially equal to that of a bore. Grooves are formed on concentric circles in the throttle valve to orient filler circumferentially. A throttle valve provided with circumferentially oriented filler can be formed by impregnating an aggregate formed by circumferentially arranging the filler with a resin and curing the resin. A rib is formed in a part near a throttle shaft to control molding shrinkage so that the roundness of the bore is small.

Abstract: A lightweight, low cost throttle body and throttle valve placed in the body, both formed of resins, that resolve the problem of excessively large gap formation is disclosed. Circumferentially oriented filler contained in a resin forming a throttle valve compensates to make the radial linear expansion coefficient of the throttle valve substantially equal to that of a bore. Grooves are formed on concentric circles in the throttle valve to orient filler circumferentially. A throttle valve provided with circumferentially oriented filler can be formed by impregnating an aggregate formed by circumferentially arranging the filler with a resin and curing the resin. A rib is formed in a part near a throttle shaft to control molding shrinkage so that the roundness of the bore is small.

Abstract: In an initial opening degree setting mechanism which keeps an initial opening degree of a throttle valve (24) larger than that of a fully closed position thereof when no current is supplied to a motor (12) for driving a throttle shaft (18) for the throttle valve (24), a throttle lever (3) and a sleeve (45) are inserted into the throttle shaft (18) and secured thereto and a sleeve (42) integrated with a return lever (2) is fitted over the sleeve (45) so as to permit a relative rotational mevement with respect to the sleeve (45). The sleeve (42) is urged by a return spring (4) in the direction of closing the throttle valve (24) upto the position of the initial opening degree. With the urging force the return lever (2) is placed to be engageable with the throttle lever (3).

Abstract: An initial opening degree setting mechanism keeps an initial opening degree of a throttle valve larger than that of a fully closed position thereof when no current is supplied to a motor for driving a throttle shaft for the throttle valve. A throttle lever and a sleeve are inserted into the throttle shaft and secured thereto, and a sleeve integrated with a return lever is fitted over the sleeve so as to permit a relative rotational mevement with respect to the sleeve. The sleeve is urged by a return spring in the direction of closing the throttle valve up to the position of the initial opening degree. With the urging force, the return lever is placed to be engageable with the throttle lever. The throttle shaft has a valve opening force applied by a spring for keeping the initial opening degree of the throttle valve near the fully closed position thereof.

Abstract: An intake valve control apparatus for an internal combustion engine eliminates adverse effects due to accumulation of deposit materials downstream of the throttle valve to always ensure a smooth movement of the throttle valve. The apparatus has a body member forming an intake air passage and a throttle valve rotatably mounted therein. The throttle valve has a first outer circumference which rotates toward the upstream side thereof and a second outer circumference which rotates toward the downstream side thereof. A wall surface inside the body member opposite the first outer circumference of throttle valve is spherical, and wall surface of the body member opposite the second outer circumference of the throttle valve is cylindrical.

Abstract: In an air flow rate control apparatus having an idle revolution speed control apparatus, in order to prevent the measuring part from freezing by water drops in the idle revolution speed control apparatus, and in order to layout an engine room easily and freely, a perpendicular cavity 9 of cylinder type is formed in a base part 2B of a throttle body 2, in which a bottom part of the cavity 9 is closed by a seal plug 7 and an upper part of the cavity 9 is led to a boa 3 of a cylinder portion 2A, and a bottom par of the perpendicular cavity 9 is arranged lower than a bottom end of aperture part 10 of an air passage and a water pool portion 9B is formed thereunder. Furthermore, a passage section lower part of an air-outlet passage 22a, 22b of a ISC valve 5 is arranged lower than the measuring part 39a, 39b of the bottom end.

Abstract: In a throttle valve actuating apparatus, a return spring member is arranged between one side face of a throttle valve main body and an acceleration drum member. The return spring member includes two coil spring members. One collar member is arranged at a side of a throttle valve main body, and another collar member is arranged at an acceleration drum member. The two collar members are provided directly and independently surrounding a throttle valve shaft and are set for positioning the shaft. The movement of the return spring member is restrained by the two collar members. The return torque due to the return spring member can be transmitted smoothly.

Abstract: A throttle body comprises a light metal first body having an operation space of a throttle valve and a synthetic resin second body which faces to the first body through a space. The first body and the second body are connected by a connecting member through a seal member.

Abstract: An engine throttle valve with a driving motor for driving the throttle valve, comprises controller means for controlling the driving motor on the basis of an operation of an accelerator pedal so that a throttle movement of the throttle valve is controlled through the driving motor by the controller means on the basis of the operation of the accelerator pedal, wherein the throttle valve further comprises, first moving means which move in accordance with the throttle movement of the throttle valve, and second moving means which move in accordance with the operation of the accelerator pedal and are capable of engaging with the first moving means to move the first moving means, and the control means control a movement of the first moving means through the driving motor to prevent the first moving means from engaging with the second moving means when the accelerator pedal is pressed to open the throttle valve.

Abstract: A throttle actuator for controlling a throttle valve disposed in the intake passage of an internal combustion engine in accordance with a signal representing the throttle opening demand. The throttle actuator has a rotary type acutator motor and a coolant pipe arranged in a portion of the actuator motor or in the vicinity of the actuator motor so that heat generated in the actuator motor is effectively absorbed by coolant which branches from the engine coolant line. The rotary type actuator motor can stably operated even under severe environment condition so as to prevent any decrease in the output torque and ensure improved precision and safety in the control of opening of the throttle valve.

Abstract: An electromagnetic valve including an electromagnetic unit having a magnetic core, a coil bobbin arranged around the core, an electromagnetic coil wound around the bobbin, a stationary yoke and a first valve seat formed in a flange of the coil bobbin and a valve unit having a movable yoke, a valve stopper provided at an end of the movable yoke whose other end is rotatably coupled with the stationary yoke and a second valve seat provided in opposition to the valve stopper. When the coil is not energized, the valve stopper is resiliently urged against the second valve seat and a first fluid passage connected to the first valve seat is communicated with a valve chamber in the valve unit, but when the coil is energized, the movable yoke is attracted to the core to urge the valve stopper against the first valve seat and a second fluid passage connected to the second valve seat is communicated with the valve chamber.

Abstract: An improvement of an electromagnetic valve apparatus, in which a fluid passage is opened or closed by a movable iron core. The invention provides a hand-operated transfer device having a flat spring member with a large diameter annular element and a small diameter annular element, and an extended element which is connected with both annular elements at one portion. A hand operated member has an inner end which contacts an end of the extended element and is operable from the other end from the outside of the valve. Operation of the member results in movement of the iron core by the small diameter annular element.