Abstract: Angle sensor device has magnetic force detectors detecting alternation of magnetic force caused by rotation of a throttle gear. The magnetic force detectors are buried in a molded body of the angle sensor device constructed of foamed resin. The magnetic force detectors each has a sensing unit detecting alteration of magnetic force and a computing unit computing based on signals from the sensing unit and outputting signals depending on the alteration of magnetic force and is formed in L-shape. Two of the magnetic force detectors are placed opposite each other such that one of the sensing units is disposed on the other sensing unit. The molded body has a cavity surrounded by the magnetic force detectors.

Abstract: A resin gear comprises a rim in an outer peripheral part of a plate, teeth provided on an outer periphery of the rim, a boss provided in a central part of the plate, and a circular rib between the boss and the rim. The resin gear is manufacturable by injection molding that a molten material is injected into a cavity through a plurality of gates arranged at almost equally spaced intervals circumferentially on a forming portion for the circular rib in a direction perpendicular to a side of the plate. The resin gear includes a plurality of inner thin-wall portions on the plate between the circular rib and the boss and a plurality of outer thin-wall portions on the plate between the circular rib and the rim, each of the inner thin-wall portions and the outer thin-wall portions being symmetrically shaped with respect to the radial line passing through each gate corresponding point.

Abstract: A method of molding a part, such as throttle valve and a throttle body, of a throttle device includes resin-molding the part by an injection molding process using a molding die. The molding die has a mold cavity having a cavity portion for molding a base that may protrude from the resin part. The cavity portion for molding the base communicates with an injection gate, from which molten resin is injected into the mold cavity. The configuration of at least one of the base and the injection gate is determined such that a projection formed at the injection gate can be removed without substantially damaging the resin part.

Abstract: Angle sensor device has magnetic force detectors detecting alternation of magnetic force caused by rotation of a throttle gear. The magnetic force detectors are buried in a molded body of the angle sensor device constructed of foamed resin. The magnetic force detectors each has a sensing unit detecting alteration of magnetic force and a computing unit computing based on signals from the sensing unit and outputting signals depending on the alteration of magnetic force and is formed in L-shape. Two of the magnetic force detectors are placed opposite each other such that one of the sensing units is disposed on the other sensing unit. The molded body has a cavity surrounded by the magnetic force detectors.

Abstract: A resin gear comprises a rim in an outer peripheral part of a plate, teeth provided on an outer periphery of the rim, a boss provided in a central part of the plate, and a circular rib between the boss and the rim. The resin gear is manufacturable by injection molding that a molten material is injected into a cavity through a plurality of gates arranged at almost equally spaced intervals circumferentially on a forming portion for the circular rib in a direction perpendicular to a side of the plate. The resin gear includes a plurality of inner thin-wall portions on the plate between the circular rib and the boss and a plurality of outer thin-wall portions on the plate between the circular rib and the rim, each of the inner thin-wall portions and the outer thin-wall portions being symmetrically shaped with respect to the radial line passing through each gate corresponding point.

Abstract: A throttle body (2) includes a resin main body (3) defining a bore (7) through which intake air flows, a valve body (60) having a shaft part (20) rotatably supported by the resin body (3) and a valve part (4) for opening and closing the bore (7) of the main body (3), and a resin cover body (40) attached to the main body (3). The cover body (4) is attached to the main body (3) by welding.

Abstract: A resin main body (3) defining a bore (7) through which intake air flows, and a valve body (60) having a shaft part (20) rotatably supported by the main body (3) and a valve part (4) for opening and closing the bore (7) of the main body (3) are provided. The main body (3) is molded with the valve body (60) inserted together with a pair of bearing sleeves (24). At the time of molding the main body (3), the bearing sleeves (24) are biased in a direction opposite to the flow of the intake air with the valve body (60) being positioned in place.

Abstract: A throttle body includes a resin body (3) defining a bore (7) through which intake air flows, and a valve body (60) having a shaft part (20) rotatably supported by the body (3) via a pair of bearing members (24) and a resin valve part (4) for opening and closing the bore (7). End faces (67) of the valve part (4) slidably contacting with end faces (69) of the bearing members (24). The end faces (67) and (69) of at least one of the valve part (4) and the bearing members (24) slidably contacting with each other are formed to have a radius (69r) equal to or larger than a radius (68r) of paths of rotation (68) of radially outer ends (67a) of the end faces (67) of the valve part (4).

Abstract: A throttle body (2) includes a resin main body (3) defining a bore (7) through which intake air flows, a valve body (60) having a shaft part (20) rotatably supported by the resin body (3) and a valve part (4) for opening and closing the bore (7) of the main body (3), and a resin cover body (40) attached to the main body (3). The cover body (4) is attached to the main body (3) by welding.

Abstract: A resin main body (3) defining a bore (7) through which intake air flows, and a valve body (60) having a shaft part (20) rotatably supported by the main body (3) and a valve part (4) for opening and closing the bore (7) of the main body (3) are provided. The main body (3) is molded with the valve body (60) inserted together with a pair of bearing sleeves (24). At the time of molding the main body (3), the bearing sleeves (24) are biased in a direction opposite to the flow of the intake air with the valve member (60) being positioned in place.

Abstract: A resin gear comprises a rim in an outer peripheral part of a plate, teeth provided on an outer periphery of the rim, a boss provided in a central part of the plate, and a circular rib between the boss and the rim. The resin gear is manufacturable by injection molding that a molten material is injected into a cavity through a plurality of gates arranged at almost equally spaced intervals circumferentially on a forming portion for the circular rib in a direction perpendicular to a side of the plate. The resin gear includes a plurality of inner thin-wall portions on the plate between the circular rib and the boss and a plurality of outer thin-wall portions on the plate between the circular rib and the rim, each of the inner thin-wall portions and the outer thin-wall portions being symmetrically shaped with respect to the radial line passing through each gate corresponding point.

Abstract: The present invention has an object to provide a filter device in which a filter is directly fixed to a container, thus eliminating the use of a filter frame. A fuel filter 6 of a fuel supply system 60 includes a filter element 22 for filtering fuel and a filter case 21 made of resin which houses the filter element 22. Ends 22b and 22c of the filter element 22 are directly fixed to an inner wall surface of the filter case 21 by welding. Further, the filter case 21 is formed, on the inner wall surface, with a groove 34 at each end of a weld part 36 in a longitudinal (vertical) direction. The groove 34 serves to receive a melted resin squeezed out from the weld part 36. To isolate the weld part 36 from a (filtering) body 22a of the filter element 22, protrusive ribs 32 and 33 are provided on the inner wall surface of the filter case 21.

Abstract: A throttle body comprising a main body defining a cylindrical intake air channel and including a valve member movable between an open and a fully closed position. The valve seal surface and a contact surface are configured such that the valve seal surface sealingly contacts with the corresponding contact surface when a fully closed position of the valve has been displaced due to contraction of one of the main body and the valve member. The valve seal surface and the contact surface of the valve member in the fully closed position are inclined by an angle. The contact angle of inclination gradually decreases from a first point located on a circumference of the periphery of the valve member resulting from a line perpendicular to an intersection of the central axis and the rotation axis to a second point that is proximate to the rotation axis of the valve member.

Abstract: A throttle body comprising a main body defining a cylindrical intake air channel and including a valve member movable between an open and a fully closed position. The valve seal surface and a contact surface are configured such that the valve seal surface sealingly contacts with the corresponding contact surface when a fully closed position of the valve has been displaced due to contraction of one of the main body and the valve member. The valve seal surface and the contact surface of the valve member in the fully closed position are inclined by an angle. The contact angle of inclination gradually decreases from a first point located on a circumference of the periphery of the valve member resulting from a line perpendicular to an intersection of the central axis and the rotation axis to a second point that is proximate to the rotation axis of the valve member.

Abstract: A combination of a semiconductor region essentially consisting of Al.sub.x Ga.sub.1-x As (0.ltoreq.x.ltoreq.1), an insulating film formed on the surface of the semiconductor region and essentially consisting of GaAs.sub.x P.sub.y O.sub.z (w, y, z>0), and a passivation film formed on the insulating film and made of an insulating material different from the insulating film. The laminated insulating film has an extremely low leakage current. An excellent MISFET can be realized by forming a gate electrode on the surface of the laminated insulating film.

Abstract: A method of growing a gallium arsenide single crystal layer on a silicon substrate comprises steps of growing a buffer layer of aluminium arsenide on the silicon substrate by atomic layer epitaxy, and growing the gallium arsenide single crystal layer on the buffer layer epitaxially.

Abstract: A method of growing a gallium arsenide single crystal layer on a silicon substrate comprises steps of growing a buffer layer of aluminium arsenide on the silicon substrate by atomic layer epitaxy, and growing the gallium arsenide single crystal layer on the buffer layer epitaxially.

Abstract: A compound semiconductor crystal growing method includes the steps of (a) setting a substrate having a substrate surface in a reaction chamber, and (b) supplying a material gas of a compound semiconductor which is to be grown in the form of a crystal on the substrate surface within the reaction chamber and a control gas to the reaction chamber under a predetermined condition, and controlling the supply of the control gas to control an adsorption rate of the material gas on the substrate surface. The control gas makes competitive adsorption with the material gas on the substrate surface but makes no chemical reaction such that no continual accumulation on the substrate surface occurs under the predetermined condition. The competitive adsorption is defined as a phenomenon in which the material gas and the control gas compete and become adsorped on the substrate surface.

Abstract: A heterojunction between In-containing compound semiconductors in which the interface thereof is controlled at an atom level is provided by a process of atomic layer epitaxy (ALE) in which hydrogen gas is utilized as a carrier gas and as a purge gas for a separation of source gases. The time for which the purge gas is supplied can be utilized for controlling the ALE.

Abstract: A method of growing compound semiconductor epitaxial layer by an atomic layer epitaxy, comprises the steps of blowing on a predetermined surface a compound source material gas constituted by atoms having an ion polarity different from atoms constituting the predetermined surface so that the compound source material is adsorped on the predetermined surface in a non-decomposed state, and decomposing the adsorped compound source material on the predetermined surface into atoms constituting crystals at the predetermined surface so as to grow an atomic layer of atoms having the same ion polarity as the compound source material gas. The ion polarity of the atomic layer prevents adsorption of the compound source material after the atomic layer is grown.