摘要:
A fuel pump including a housing; a motor section provided in the housing which motor section includes an armature and a magnet opposed to the armature with a substantially annular space defined therebetween as a fuel passage, which armature includes a core formed by stacking a plurality of plates and a coil wound around the core; a pump section fixed to a lower end of the housing and connected to the motor section to be driven thereby; a fuel inlet formed in the pump section for sucking a fuel by driving the motor section; a fuel outlet formed at an upper end of the fuel pump for discharging the fuel fed from the fuel inlet through the fuel passage; and a first resin portion impregnated in the core and the coil for suppressing vibration of the armature. The fuel pump having the above construction preferably further includes a second resin portion coated on a surface of at least the first resin portion, which second resin portion has a resistance against the fuel and no influence upon the fuel.
摘要:
A motor-driven fuel pump including a brushless motor; a motor housing for enclosing the brushless motor; and a pump section adapted to be driven by the brushless motor for sucking a fuel and pumping the same into the motor housing. The brushless motor includes a stator fixed to an inner circumference of the motor housing; a rotor assembly adapted to be rotated by supplying current to the stator, which rotor assembly includes a motor shaft, a rotor mounted to the motor shaft a rotor cover mounted to one end of the rotor magnet on the side of the pump section, a timing rotor mounted to the other end of the rotor magnet, and a sensor magnet mounted to an end of the timing rotor on the side opposite to the rotor magnet; an end cover mounted at an inlet end of the brushless motor; a motor shaft bearing mounted in the end cover for rotatably supporting the motor shaft; and a timing rotor bearing interposed between an outer circumference of the timing rotor and the inner circumference of the motor housing for rotatably supporting the timing rotor.
摘要:
An electronic device is provided which includes a base, a through-electrode that passes through the base and from which an insulating material on an end face thereof is removed by polishing, a circuit pattern that is formed on an end face of the through-electrode, an electronic component that is disposed via an internal wiring formed on the circuit pattern, an electrode pattern that is formed on the surface of the base opposite to the surface on which the electronic component is disposed and that is connected to the other end face of the through-electrode, an external electrode that is formed on the electrode pattern, and a cap that is bonded to the base so as to protect the electronic component on the base.
摘要:
An air filter assembly has a fan, pre-filter, a main filter, and a control circuit which generates various signals to the user as to when the pre-filter and the main filter should be replaced. The control circuit detects when the pre-filter should be replaced from two conditions: a first pre-filter replacement condition based decreased air flow, and a second pre-filter replacement condition based on cumulative operating time. The control circuit detects when the main filter should be replaced based on a formula containing a number of the occurrences of the first pre-filter replacement condition and a number of occurrences of the second pre-filter replacement condition. The control circuit also detects a main filter replacement condition based on cumulative operating time of main filter. The main filter can have a fuse that is blown when the main filter should be replaced.
摘要:
A reducing water purification material having a reducing iron-based precipitate selected from green rust, iron ferrite, reducing iron hydroxide, and a mixture thereof. A wastewater treatment process having steps of adding a reducing iron compound to wastewater, leading the wastewater to which the reducing iron compound is added to a reaction tank and forming a precipitate, separating the formed precipitate by a solid-liquid separation to obtain a sludge, and alkalinizing all or a portion of the separated sludge to form an alkaline sludge followed by returning to the reaction tank, wherein in the precipitation step, the wastewater to which the reducing iron compound is added and the alkaline sludge are mixed and are allowed to react in a non-oxidizing atmosphere under alkaline condition to form a reducing iron compound precipitate as the precipitate, thereby incorporating contaminants in the precipitate to remove the contaminants from the wastewater.
摘要:
An apparatus for valve-gate injection molding producing an annular molded product having a center through-hole has a valve gate with a simplified structure. The apparatus includes a movable mold member having a first center bore extending in an axial direction, a stationary mold member having a second center bore corresponding to the first bore and providing a product cavity forming the annular molded product between the mold members, a nozzle mounted on the stationary mold member and having a resin supply route having an opening communicating with the second bore, a valve pin extending in the resin supply route and movable between a closing position for closing the opening and an opening position for opening the opening, a center pin movably arranged in the first bore and having a tip surface in contact with a tip surface of the valve pin, and a driving mechanism driving the center pin in the axial direction.
摘要:
On an optical disc including a substrate on which pits having at least two different depths are formed, main information is recorded by the shape of the pits and additional information is recorded by the depth of the pit. It is possible to reverse polarity of a tangential push-pull signal dependent on the depth of the pit, and therefore it becomes possible to record information utilizing the depth of the pit. This improves recording density of the optical disc. Further, when information of the optical disc is to be copied, the information recorded by the depth of the pit cannot be copied. Therefore, unauthorized reproduction can be prevented.
摘要:
An optical recording medium capable of obtaining a large reproduced signal from the recoded mark, a large reproduced signal of a pre-pit and a large tracking signal both in an area of the grooves and an area of the pre-pits, which provides a sufficient time allowance for switching tracking to that suitable for the area of the grooves or to that suitable for the area of the pre-pits. An optical recording medium comprising a substrate whereon tracks each comprising at least of writable grooves and pre-pits deeper than or equal to the grooves are formed and areas of a relatively shallow pits are each provided between an area of the deep pits and an area of the grooves. The depth Dg of the grooves, the depth Dsp of the shallow pits and the depth Ddp of the deep pits satisfy the following conditions: Dg
摘要:
The semiconductor image sensor device of the multiple chip mount type is constructed such that electrical and mechanical connections are carried out concurrently among chips. Coupling chips 4 are utilized to couple a plurality of semiconductor image sensor chips 1 with each other, and the couple one semiconductor image sensor chip 1 to a driver substrate 3 which mounts thereon a semiconductor driving chip 2 for driving the semiconductor image sensor chips 1.
摘要:
A semiconductor device comprises at least two semiconductor elements connected together at a connecting region of the semiconductor elements. At least one joint chip is adhered to the connection region of the semiconductor elements for connecting the semiconductor elements together. The joint chip has a trapezoidal cross-section defining a first surface and a second surface wider than the first surface. The second surface of the joint chip is adhered to the connection region of the semiconductor elements.