Abstract: A blow-by gas recirculation apparatus which can release freezing of a PCV valve in a short period of time is obtained with a simple configuration. The blow-by gas recirculation apparatus is provided with the PCV valve at a case member of a gas space portion to which blow-by gas is sent in a manner that the PCV valve penetrates through the case member and a return path supplying the blow-by the gas, which is from the PCV valve, to an induction system of an engine. A heating portion to which part of oil lubricating the engine is supplied and thus which heats the PCV valve with heat of the oil is formed.

Abstract: An oil control valve mounting arrangement includes a resin cover 5 with a metal cylindrical body 4 insert-molded therein, a valve sleeve 3 housed within the cylindrical body 4, and a spool 2 inserted in the valve sleeve 3. In at least at one end portion 14 of the cylindrical body 4 in the axial direction of the valve sleeve 3, the cover 5 includes an engaging portion 19 engageable with an interior-facing face 15b of the cylindrical body 4 facing the radially inner side of the valve sleeve 3 at an end of the cylindrical body 4 in the axis direction of the valve sleeve 3 so as to restrict displacement of the cover 5 away from the cylindrical body 4 in the radial direction of the valve sleeve 3.

Abstract: A blow-by gas recirculation apparatus which can release freezing of a PCV valve in a short period of time is obtained with a simple configuration. The blow-by gas recirculation apparatus is provided with the PCV valve at a case member of a gas space portion to which blow-by gas is sent in a manner that the PCV valve penetrates through the case member and a return path supplying the blow-by the gas, which is from the PCV valve, to an induction system of an engine. A heating portion to which part of oil lubricating the engine is supplied and thus which heats the PCV valve with heat of the oil is formed.

Abstract: A rubber gasket of annular shape adapted to be interposed between two objective members to be sealed and fastened to each other and a seal structure for sealing between two objective members to be sealed and fastened to each other using the gasket. The rubber gasket comprises an integrally molded body made of elastomer having a cylindrical body, a flange-shaped portion, and an annular core member, the flange-shaped portion extending outward from one end of the cylindrical body in axial direction along an entire outer circumferential surface, the annular core member being embedded in the flange-shaped portion along an entire circumference.

Abstract: A structure of a solenoid valve attached to a resin cover by insert-molding, the solenoid valve includes a valve body having a cylindrical shape and at least two fluid passages, a spool housed in the valve body and slidable therein in an axial direction relative to the valve body, a solenoid for actuating the spool, wherein a plurality of flanges is provided on an outer peripheral surface of the valve body, and at least one of the flanges has a through hole formed in the axial direction relative to the valve body.

Abstract: A rubber gasket of annular shape adapted to be interposed between two objective members to be sealed and fastened to each other and a seal structure for sealing between two objective members to be sealed and fastened to each other using the gasket. The rubber gasket comprises an integrally molded body made of elastomer having a cylindrical body, a flange-shaped portion, and an annular core member, the flange-shaped potion extending outward from one end of the cylindrical body in axial direction along an entire outer circumferential surface, the annular core member being embedded in the flange-shaped portion along an entire circumference.

Abstract: An oil control valve mounting arrangement includes a resin cover 5 with a metal cylindrical body 4 insert-molded therein, a valve sleeve 3 housed within the cylindrical body 4, and a spool 2 inserted in the valve sleeve 3. In at least at one end portion 14 of the cylindrical body 4 in the axial direction of the valve sleeve 3, the cover 5 includes an engaging portion 19 engageable with an interior-facing face 15b of the cylindrical body 4 facing the radially inner side of the valve sleeve 3 at an end of the cylindrical body 4 in the axis direction of the valve sleeve 3 so as to restrict displacement of the cover 5 away from the cylindrical body 4 in the radial direction of the valve sleeve 3.

Abstract: A structure of a solenoid valve attached to a resin cover by insert-molding, the solenoid valve includes a valve body having a cylindrical shape and at least two fluid passages, a spool housed in the valve body and slidable therein in an axial direction relative to the valve body, a solenoid for actuating the spool, wherein a plurality of flanges is provided on an outer peripheral surface of the valve body, and at least one of the flanges has a through hole formed in the axial direction relative to the valve body.

Abstract: A piezoelectric transformer driving circuit comprises a piezoelectric transformer which boosts an input voltage to obtain a voltage required in igniting a cold cathode tube, a restart circuit which detects the voltage output from said piezoelectric transformer and allows said piezoelectric transformer to repeatedly output a high voltage required in initially igniting said cold cathode tube, a PWM controller which allows said piezoelectric transformer to intermittently output a voltage in order to adjust the brightness of said cold cathode tube, and a stopping unit which stops the control operation of said PWM controller when restart circuit is operative.

Abstract: A piezoelectric transformer driving circuit comprises a piezoelectric transformer which boosts an input voltage to obtain a voltage required in igniting a cold cathode tube, a restart circuit which detects the voltage output from said piezoelectric transformer and allows said piezoelectric transformer to repeatedly output a high voltage required in initially igniting said cold cathode tube, a PWM controller which allows said piezoelectric transformer to intermittently output a voltage in order to adjust the brightness of said cold cathode tube, and a stopping unit which stops the control operation of said PWM controller when restart circuit is operative.

Abstract: A helical resonator filter is disclosed which comprises helical coils wound on hollow bobbins respectively, and magnetic cores adjustably inserted in the hollow bobbins respectively, the helical coils being electromagnetically coupled to each other via the magnetic cores. The hollow bobbins are accommodated in a metal casing which is provided with no inside partition wall formed with a window adapted for enabling the coils to be electromagnetically coupled to each other. Thus, the characteristic of the helical resonator filter can be controlled as desired, simply by adjusting the length of that portion of each magnetic core which is inserted in or overlapped by each helical coil.