Abstract: A fuel injection system which includes an injection valve for a self-igniting internal combustion engine with direct fuel injection, in particular for liquefied gas fuels, and which is configured as a pintle-type nozzle opening against the force of at least one spring, has the opening force of its fuel needle directly provided by the magnetic force of a solenoid so as to create simplified rate shaping. The magnetic force increases quadratically with the needle lift vis-a-vis the force of the spring increasing linearly with the needle lift, resulting in an opening velocity of the needle increasing approximately quadratically, at least in certain regions, thus permitting small pintle lifts, and the needle has a maximum needle lift of smaller than 1 mm, i.e., preferably smaller than 0.5 mm.

Abstract: A rotating polygon mirror driving apparatus has a rotor having a rotating polygon mirror fixed thereto, a rotational shaft and a rotor magnet; a bracket having a base plate provided opposite to the rotor magnet and a collar forming a bearing holding portion of a resin outserted to the base plate and made; and a bearing fitted to the bracket so as to support the rotational shaft. The driving apparatus can be decreased in cost and thickness while maintaining excellent rotational precision and mechanical precision.

Abstract: A trigger actuated pump sprayer has a nozzle cover for sealing the discharge orifice closed against leakage by the provision of a cup-shaped element on the cover which telescopes about a nosepiece in which the orifice is formed and fluid tightly engages a seal ring extending laterally outwardly of the nosepiece in the closed position of the cover. The cover is locked in its closed position and is rendered child-resistant by the provision of at least one resilient lock pin extending through an opening in the sprayer housing requiring an inward depression of the lock pin with one hand and a flipping open of the cover with the other hand.

Abstract: An articurator is comprised of a mandibular frame being provided with condyles, a maxillary frame mounted on the mandibular frame via condylar guide mechanisms, an anterior guide table provided on the front end of the mandibular frame, and an anterior guide pin provided on the front end of the maxillary frame. The anterior guide table comprises a table portion and lateral wings. The table portion has a sagittal inclination angle adjusting mechanism, and the lateral wings has lateral wing angles adjusting mechanisms. The anterior guide pin makes contact with and slides on an anterior guide mechanism formed by the surface of the anterior guide table. The condylar guide mechanisms in which the condyle is positioned have condylar path inclination angle adjusting mechanisms. The sagittal inclination angle, the lateral wing angles, and the condylar path inclination angles are to be adjusted by two steps to specified values of a first group and to specified values of a second group.

Abstract: A tooth surface treating agent is provided which comprises a polymerization catalyst and an acidic compound, both water-soluble, the treating agent being capable of enhancing tooth adhesion. The tooth surface treating agent imparts strong adhesion to the enamel and dentin of teeth through simultaneous treatment thereof. The invention is mainly intended for use in the field of dentistry, but is also applicable as a treating agent for vital hard tissues in such fields as surgery, and orthopaedic or plastic surgery.

Abstract: A pump which is easy to manufacture and which has a high efficiency and low vibration includes a pair of identical circular-shaped impellers which are respectively eccentrially and rotatably connected to respective parallel shafts so as to rotate oppositely to one another while keeping a constant spacing therebetween, a pair of identical cylindrical impeller chambers in which the impellers are respectively positioned such that the impellers circumferentially slide along an inner peripheral surface of the impeller chambers, one impeller acting to discharge fluid from the impeller chamber in which it rotates and the other acting to intake fluid into the impeller chamber in which it rotates, and a connecting plate that couples the impellers together and causes them to be spaced a constant distance apart.

Abstract: An audio signal transmission apparatus for use in a system for judging whether voice or sound is present or not to transmit only the voice presence portion of a digital audio signal which apparatus transmits data inputted earlier than the judgment time of the voice presence to thereby prevent the head of a word from being lost and dissolves the delay time caused at this time by compressing the time axis. The apparatus includes a delay circuit for storing a past audio signal data train, a time axis compression unit for compressing an audio signal taken out from the delay circuit through a switch and an audio signal inputted through a switch on a time axis, a level judgment unit for judging whether the audio signal is present or not to operate the switches, and a data conversion unit for converting the digital audio signal into parameters to be transmitted.

Abstract: A movable structure is provided for supporting a motorized personal watercraft on a boat trailer on a platform elevated above the boat carried on the trailer. The structure is in the form of L-shaped bracket having horizontal legs engaged by elongated guide supports mounted transversely on the trailer undercarriage, and vertical legs supporting a movable platform for the personal watercraft.

Abstract: A low cost trigger sprayer comprises a pump body, a hand support flange extending laterally from the body for engaging an operator's hand when operating the sprayer, and a container closure cap on the body, the pump body comprising a pump cylinder, an upstanding dip tube support sleeve, and a laterally extending tubular outlet, the pump cylinder, support sleeve, tubular outlet, closure cap and hand support flange being of a one-piece molded plastic construction, and a separate cover overlying at least top and rearward ends of the pump body and extending to the hand support flange.

Abstract: Process for preparing beads based on acrylic polymers which comprises the preparation of microbeads from 10 to 40 micron by means of a polymerization process in suspension of acrylic monomers in the presence of at least a crosslinking monomer at least bifunctional, characterized in that a second polymerization of the acrylic monomers is carried out in absence of crosslinking monomers and using as suspending phase a fraction of the suspension obtained in the preceding polymerization containing a crosslinking agent, said fraction containing an amount of microbeads comprised between 3 and 40% by weight with respect to the final polymer obtained in the second polymerization.

Abstract: The present invention concerns a method of separating variable ores containing copper, lead, zinc and the like as the refining material for non-ferrous metals and gangue minerals such as pyrite, quartz, feld spar and the like from dug out ores and, particularly, it relates to a flotation method. For obtaining non-ferrous metal valuable ores as concentrates from ores by a flotation method, flotation is conducted by using gaseous sulfurous acid or aqueous sulfurous acid as a depressant for controlling the floatability of pyrite. The flotation method comprises measuring the redox potential of an ore solution before and after the addition of gaseous sulfurous acid or aqueous sulfurous acid and determining an optimum addition amount by utilizing a proportional relationship present between the difference of the potential and the valuable quality enhancing rate.

Abstract: A materials system in which exchange coupling is achievable has the potential for allowing direct overwriting of data and comprises at least two multilayer films of platinum and cobalt with independently controlled coercivity and Curie temperatures.

Abstract: A driver for an induction motor includes a voltage limiter which limits an upper limit value of an output voltage from an invertor circuit in accordance with an output frequency command, a lowest frequency limiter which limits a lower limit of an output frequency from the invertor circuit, a forward rotation limiter which outputs a first power supply interruption signal when the output frequency from the invertor circuit reaches the upper limit, a reverse rotation limiter which outputs a second power supply interruption signal when a reverse rotational speed of the motor reaches a reverse rotation limit level, and a low-speed overload detector which outputs a third power supply interruption signal when a state in which the second power supply interruption signal is not output continues in a low speed abnormality state.

Abstract: A foamer nozzle assembly has a foaming barrel defining a turbulence chamber for creating foam upon actuation of the trigger of a trigger sprayer as the conical spray impacts against the smooth inner surface of the barrel as so to emerge as loosely compacted, large foam bubbles having a relatively wide foam spread. A foaming grid in the form of an offset rectangular mesh screen is mounted on a hinged panel for movement between operative and inoperative positions. In the former the grid lies coaxial with the discharge orifice and provides a supplemental foam generator for breaking up the foam bubbles into finer and more concentrated foam having a relatively smaller foam spread. The grid comprises first and second sets of ribs lying in first and second parallel planes, the ribs of the first set being contiguous to the ribs of the second set, and the ribs being mutually spaced apart to define uniformly sized openings therebetween.

Abstract: An electrode suitable for use in fuel cells, for example in solid polymer fuel cells, comprises a non-uniform electrode layer and has improved electrochemical performance.

Abstract: A drinking mug for small children, handicapped and hospital patients, comprising a cup, a lid and a suction tube, is configured in an airtight manner so that only access to the inside of the mug is through the suction tube. Tightness is achieved by disposing the suction tube on the inside of the lid on a drinking spout and by providing a sealing ring in the joint between the lid and the cup. Due to the airtight construction, when liquid is sucked up an under pressure is created inside the mug which subsequently empties the suction tube of liquid. Correspondingly, an attempt by the liquid to run out through the suction tube when the mug is tipped over is counteracted by the siphon effect which results from the airtight construction.

Abstract: An electrolytic process for simultaneously cleaning and metal-coating the surface of a workpiece of an electrically conducting material, which process comprises: i) providing an electrolytic cell with a cathode comprising the surface of the workpiece and an anode comprising the metal for metal-coating of the surface of the workpiece; ii) introducing an electrolyte into the zone created between the anode and the cathode by causing it to flow under pressure through at least one opening in the anode and thereby impinge on the cathode; and iii) applying a voltage between the anode and the cathode and operating in a regime in which the electrical current decreases or remains substantially constant with increase in the voltage applied between the anode and the cathode, and in a regime in which discrete gas bubbles are present on the surface of the workpiece during treatment.

Abstract: An adjusting mechanism for use in a staple gun includes an adjuster which is movably received within a slot defined in an outer tube and communicating with a chamber thereof, such that the movement of the adjuster will change the space within the chamber and therefore alter a thrust generated by an explosion of cartridge and which impacts agsinst a staple releasably received within the staple gun.

Abstract: A precompression pump sprayer of the type having main and secondary pump cylinders and pistons have a two-piece main piston assembly comprising a separate piston sleeve element of molded compliant material and a hollow piston stem of molded rigid material affixed thereto. The more rigid stem permits a reduction in its overall height and overall diameter, resulting in a reduction of the overall height of the pump sprayer. The cylinder has an extension in frictional engagement with the separate sleeve element of the main piston assembly for fixing the secondary cylinder thereto.