Abstract: A number of air-transpiration holes (4) are provided at a leading edge portion (2) of a cooled blade (1). Cooling air flowing through a cooling air passage (15) formed inside of the blade blows out to the blade surface of the leading edge portion (2) of the cooled blade (1) by way of the air-transpiration holes (4), to thereby shower-head cool the surface of the leading edge portion (2). The air-transpiration holes (4) are formed so as to extend substantially orthogonal to the leading edge surface of the cooled blade (1) such that the acute-angled portions are eliminated, whereby thermal stress is reduced and cracking is prevented.

Abstract: A gas turbine moving blade platform having a simplified cooling structure for effecting uniform cooling of the platform. The platform (1) includes cavities (2, 3, 4) and an impingement plate (11) provided below the cavities (2, 3, 4). A cooling hole (5) communicates with cavity (2), cooling hole (6) communicated with cavity (3) and cooling holes (7, 8) communicate with cavity (4) and all of the cooling holes pass through the platform (1) at an inclined angle. Cooling air (70) flows into the cavities (2, 3, 4) through holes (12) in the impingement plate (11) for effecting impingement cooling of platform (1) plane portion. The cooling air (70) further flows through the cooling holes (5, 6, 7) to blow outside angularly upward for cooling peripheral portions of the platform. Thus, the platform is cooled uniformly, no lengthy and complicated cooling passage is provided, and workability is enhanced.

Abstract: A rotor blade arrangement for a bearingless rotor of a helicopter includes a flexbeam connecting an airfoil blade to a rotor head, and a control sleeve surrounding the flexbeam. The control sleeve is relatively stiff, but the flexbeam has portions that are flexible so as form a fictitious flapping hinge, lead-lag hinge, and torsion axis, which respectively enable flapping, lead-lag pivoting, and torsional movements of the airfoil blade. The inboard end of the control sleeve is secured to the root end of the flexbeam near the rotor head to prevent lateral displacements therebetween. Damping elements are arranged within the enclosure of the control sleeve at a location between the fictitious lead-lag hinge of the flexbeam and the transition region at which the flexbeam transitions into the airfoil blade.

Abstract: A hydraulically reversible, adjustable propeller unit for aircraft, land vehicles and watercraft, with a propeller with at least two blades, the pitch of which is controllable by means of a control unit (controller), whereby a hydraulic connection exists between the rotating propeller and the stationary control unit for controlling the blade pitch, with a spring-preloaded piston actuated by means of a hydraulic fluid, and with adjustable mechanical stop means for the start position, the brake position and the cruising or sailing position, whereby the piston is designed as a spring-preloaded double piston consisting of an inner piston and a ring piston arranged around the inner piston, said two pistons being lockable with each other by means of a centrifugal-force locking mechanism; the stop means for the start position is designed for limiting the setting range of the locked double piston in order to prevent unintentional reversing at speeds above about 1500 rpm; and the brake position can be reached only whe

Abstract: An axial flow fan having impeller blade section fixed in a rotor of a motor where shaft supporting the rotation of the rotor is fitted to intermediate fastening section, and boss, which holds the synthetic resin fan with fan blades, surrounds and firmly connects the intermediate fastening section. The shaft is made from metal, and this allows a secure press fit with the metal intermediate fastening section. The neck joining the intermediate fastening section and the boss has a through hole for the shaft to pass and supporting arms project between boss and intermediate fastening section. In addition, the connecting sections between the shaft and the intermediate fastening section, and the boss and the intermediate fastening section may be knurled.

Abstract: An air circulator fan has front and rear fan guard members, each of which have a grille forming a concave dish. A propeller is positioned between the fan guard members, and is attached to the rotary output of a motor. The motor is positioned centrally on the front fan guard member, in a location downstream from the propeller. When the propeller rotates during operation of the fan, air is drawn through the rear fan guard member and out the front fan guard member. Each grille has a first spacing at a major face portion thereof, and a second, lessor spacing proximate a periphery thereof. This arrangement allows debris (such as feathers in a poultry barn) to pass through the major face portion of each grille, but provides a safety feature near the periphery of the guard members. A three-point mount is provided for suspending the fan, with chains or cables, from an overhead surface.

Abstract: An apparatus for detachable connection of a ceiling fan motor housing to a ceiling mounting assembly. The ceiling fan downrod provides a standardized elongated tube that is connectable to a multitude of ceiling fan housings and assemblies, and provides a universal ground wire connection through a plurality of holes for electrical grounding of the apparatus. The downrod is an elongated tube with a hollow center, having a plurality of pairs of holes near each end of the downrod. Each open end of the downrod has a plurality of threads on the exterior surface of each end, the threads providing one connecting method to attach one end of the downrod to a ceiling mounting assembly, and the second end of the downrod to a motor housing of the ceiling fan. The downrod provides numerous options for connecting the downrod to ceiling fan assemblies, and provides versatility for attachment of electrical ground wires through the plurality of holes in the downrod.

Abstract: A fluid ladder or a fluid lifter and a method for lifting a liquid or a flowable or fluid-like material such as grains, sand, soil, and the like from one level to a higher level preferably through oscillation. The fluid ladder is capable of lifting fluids without the use of conventionally known pump devices and without the need for energy sources such as electrical energy, combustion energy and the like. The apparatus may be operable using energy sources such as that provided by muscles e.g., the muscle use of a human being or animal or the energy provided by oscillatory wave motion of a body of fluid. The fluid ladder lifts fluid through a series of, or a plurality of, reservoirs.

Abstract: Continuously variable transmission having a hydraulically adjustable transmission ratio, includes a hydraulic circuit that interacts with a reservoir, at least two pumps for pumping hydraulic medium from the reservoir to an outflow channel and adjustor which act on the circuit, for switching the pumps in series or in parallel or is suitable for making and breaking hydraulic connections between an outlet opening of the first pump and an inlet opening of the second pump, between the outlet of the first pump and the outflow channel and between the inlet opening of the second pump and the reservoir and is at least provided with individual hydraulic elements for making and breaking a hydraulic connection between the outlet opening of the first pump and the inlet of the second pump and between the reservoir and the inlet opening of the second pump.

Abstract: A pressure gauge of a tire pump includes a chamber communicated with the chamber and a pressure indicator is movably received in the chamber. The pressure indicator has a tube with a head portion attached to a first end thereof and a receptacle defined in a second end thereof. The head portion is in slidable contact with an inner periphery of the chamber and the tube is not in contact with the inner periphery of the chamber. A first rotational member is rotatably mounted to an end wall defining the receptacle of the tube. A second rotational member is rotatably mounted to the end member. A spring has a first end securely attached to the first rotational member to move therewith and a second end securely attached to the second rotational member to rotate therewith. Thus, rotational effect of the spring during movement of the pressure indicator is eliminated to provide accurate tire pressure indication.

Abstract: A variable displacement compressor contains a displacement control valve system for controlling a displacement of fluid for compression. The displacement control valve system comprises a pressure sensing means for sensing a pressure of a suction chamber (63) or a pressure of a crank chamber (23), a transmission rod (101) supported so as to be capable of passing through a valve casing with an end thereof being in contact with this pressure sensing means, a valve body (127) for opening/closing a communication path between a discharge chamber (65) and a crank chamber (23) in correspondence to extension or contraction of the pressure sensing means while the other end of the transmission rod (101) is in contact with the valve body (127), and a solenoid (123) for applying an electromagnetic force to this valve body (127). A valve shaft (131) of the valve body (127) is supported so as to be capable of passing through a stator (111) of the solenoid (123).

Abstract: A low pressure-side first-stage compressor impeller and a high pressure-side second-stage compressor impeller are mounted respectively on opposite ends of a rotation shaft. A rotor of an electric motor for driving the two impellers is formed at a central portion of the rotation shaft. A stator of the motor is held by a motor casing. The motor casing, a first-stage compressor casing, which cooperates with the first-stage compressor impeller to form a first-stage compressor, and a second-stage compressor casing, which cooperates with the second-stage compressor impeller to form a second-stage compressor, are cast into an integral construction. This integral casing is further formed integrally with an intermediate cooler, disposed downstream of the first-stage compressor, and a discharge cooler disposed downstream of the second-stage compressor.

Abstract: A multistage vacuum pump assembly comprising plural independent pumping stages connected in series is disclosed. A first pumping stage located at one end of the series is connected to a room to be evacuated, and a final pumping stage located at the other end of the series is connected to the atmosphere. At least the first pumping stage comprises plural pumps connected mutually in parallel, so that the plural pumps together can achieve the vacuum capacity expected without being driven to an excessive rate of rotation.

Abstract: The invention concerns a contraction engine or pump comprising two mutually spaced rigid elements (4, 6) connected to each other by at least one piston/cylinder system (8, 10) receiving an operational medium and of which at least one element is displaceable in the direction of motion of the piston/cylinder system. At least one expansible and contractile operational element (11) is connected to the two elements (4, 6) and is operationally connected with a fitting for liquid intake and exhaust and/or water vapor intake and exhaust and which will expand in the case of liquid and/or water vapor intake and will contract in the case of liquid exhaust and/or water vapor reduction. The cylinder (8) is connected to intake and exhaust conduits (12, 14) for the operational medium.

Abstract: A pump unit with a drive motor mounted onto a pump block which reduces noise problems which stem from clearance fits that are required in order to be able to mount the drive motor onto the pump block. A pump unit set forth eliminates clearance fits required for the perfect assembly of the pump unit by means of plastic introduced into the clearance fits. The pump unit is particularly provided for slip-controlled vehicle brake systems in motor vehicles.

Abstract: A pump assembly is provided including a motor, a motor housing, a dual-bearing rotational drive assembly, an integrated adapter, a pump housing, a seal assembly, and an impeller. In accordance with one embodiment of the present invention, the dual-bearing rotational drive assembly comprises a drive shaft and first and second bearings. The motor housing is disposed about the motor and defines a front end and a rear end. The pump housing is disposed about the impeller. The integrated adapter is arranged to couple mechanically the rear end of the motor housing to the pump housing. The motor is arranged to impart rotational movement to the drive shaft about a drive shaft axis. The drive shaft is coupled to the impeller such that rotation of the drive shaft causes rotation of the impeller.

Abstract: A compressor assembly including a compression mechanism, a rotating crankshaft operably coupled to the compression mechanism, the crankshaft provided with a longitudinally-extending oil conveyance passageway, the oil conveyance passageway in fluid communication with relatively moving interfacing bearing surfaces of the compression mechanism, and an oil pump assembly. The oil pump assembly includes an oil pump body having an interior surface and being rotatable relative to the crankshaft, a vane disposed within the pump body and rotating with the crankshaft, the vane having at least one end in sliding engagement with the interior surface of the oil pump body, and a port plate disposed within the pump body and having rotatably opposite first and second positions. The vane is in sliding engagement with an adjacent surface of the port plate, and the port plate is provided with an inlet and an outlet.

Abstract: In scroll-type fluid apparatus in which a flap valve is provided to face a discharge port for discharging a fluid, the flap valve has a bridging portion which is between a supporting portion and a closing portion and has a narrow part narrower than the supporting and the closing portions. The supporting portion is fixed to the apparatus. The closing portion faces the discharge port. A scroll-type transferring mechanism is coupled to the discharge port and transfers the fluid towards the discharge port to discharge the fluid through the discharge port.

Abstract: Scroll compressors are provided with injection ports for injecting fluid from a supplemental source such as an economizer cycle or by-passing fluid through an unloader valve. The injection ports are formed in each of two compression chambers whose volume is being reduced towards a discharge port. Due to various design constraints, it is desirable that the injection ports have unequal characteristics. In some cases, it may be desirable to make the injection ports of different size, including width, depth, and length. In other applications, it may be desirable to locate the injection ports at different angular positions relative to compression chambers seal off from suction.

Abstract: A first lubricating oil passage and a second lubricating oil passage, extended from a contacting surface between a partition wall and a fixed scroll are formed in the partition wall (middle housing). A recess for communicating the first lubricating oil passage with the second lubricating oil passage is formed on the fixed scroll. Accordingly, the lubricating oil amount between the first lubricating oil passage and the second lubricating oil passage is easily controlled by adjusting the size of the recess.

Abstract: A mold for a pneumatic tire includes a plurality of mold sections that cooperate to form an annular mold. Each of the mold sections has a body with an inner surface. The body defines at least one longitudinal groove that opens at the inner surface. The body defines at least one longitudinal groove that opens at the inner surface. The groove has a mouth and a body with the width of the mouth being smaller than at least the largest width of the body. In one embodiment of the invention, the groove has a female dovetail cross section. The grooves in the mold sections cooperate to form a continuous, 360 degree groove about the tire mold. A plurality of die ribs are slidingly disposed in the grooves. Each die rib has a base that corresponds with the cross section of the groove. Thus, the die rib in the above-embodiment has a male dovetail cross section that is configured to slide within the groove.

Abstract: The present invention provides a tire vulcanizing equipment capable of improving the production cycle by miniaturization of idle time of each device and shortening of carrying time, reducing the cost by simplification of the device and space saving, and smoothing the physical distribution line. This vulcanizing equipment comprises vulcanizing stations C consisting of the arrangement of a plurality of mold bases 2 having pipings for supplying and discharging a vulcanization medium to tire mold assemblies 1 placed thereon; an opening and closing station A having an opening and closing device 6 for opening and closing the moving mold 1, a loader 7, and an unloader 8; and a transfer station D having a transfer device for transferring the tire mold assembly 1. The vulcanizing stations C and the opening and closing station A are arranged circularly around the transfer station D.

Abstract: A process and a corresponding device for filtering plastics in an injection molding machine having a plasticizing unit and a mold cavity. A slide having a receptacle for a filter element is arranged between the plasticizing unit and the mold cavity. A piston cylinder displacing unit is mounted parallel to a principal axis of the plasticizing unit so as to be slideably contactable by the slide holding the filter element. The displacement unit has a filter holder surrounded by a filter preheater for the insertion and preheating of a fresh filter element. The slide is displaced so that the filter receptacle in the slide corresponds to the filter holder in the displacement unit thereby enabling a spent filter element to be ejected while simultaneously inserting the fresh filter element into the receptacle. The slide is then returned to its operating position in which the filter element is acted upon by the plastic casting substance.

Abstract: A mold assembly for injection-molding flat-type heat sinks, includes a male mold, a female mold engageable with the male mold, a base mounted on one side of the female mold and having a cavity in communication with the female mold, and a movable block disposed within the female mold and having one side formed with molding structure, whereby a clearance between a flat-type heat sink and the movable block will be eliminated by moving the movable block against the flat-type heat sink.

Abstract: A manifold for a multiple injection unit injection molding machine that allows the machine to be used when a standard conventional mold is attached to a platen. The manifold includes a first inlet port that is in communication with one nozzle of the machine and a second inlet port that is in communication with another nozzle of the machine. Each inlet port communicates with an inlet passage and the two inlet passages join an exit passageway at a junction. The exit passageway is in communication with an exit port to transfer fluid to a mold cavity. The manifold has a valve located at the junction to control the flow of material through the exit passageway.

Abstract: A die clamp assembly for an extruder comprises at least one passage through which product being extruded flows. The die clamp assembly is attached to an extruder and comprises a last barrel that is connectable to the extruder. The last barrel comprising a flange and the extruder and last barrel define at least one passage through which product flows; at least one die body comprising at least one die body passage that communicates with the at least one passage; and at least one die plate that comprises at least one die plate passage that communicates with the die body passage and at least one opening so product can be extruded from the at least one opening. A clamp collar assembly connects corresponding peripheral surfaces of the last barrel to the die body, and comprises a closed position that connects the last barrel to the die body and an open position that permits separation of the last barrel and the die body.

Abstract: An injection molding apparatus having an A side and a B side for use with interchangeable molding tools that allow the center gating of a part. Center gating directly into a molding tool provides a uniformly stress resistant cylindrical part. The use of interchangeable molding tools provides easy replacement of tools that are designed to produce a variety of different parts. Each interchangeable molding tool provides a runner tool distribution system to allow injected material to enter directly into the center of a part to be molded. Once the part is molded, the runner that is formed in the runner tool distribution system is separated from the molded part. The molded parts are then simultaneously released from the mold assembly.

Abstract: A compression molding system has a pair of mold part holders with corner assemblies that perform guidance, stop and stabilization functions. Interchangeable heated mold parts lacking the aforesaid functions, are removably attached to the respective holders in such a manner that sheet metal core and cavity components of the mold parts are properly aligned. The guidance function of the holders guides the movement of the mold parts toward one another, and the stop function limits such movement to provide a predetermined space between the sheet metal components in order to form compression molding material therebetween to a desired shape and thickness. The stabilization function prevents longitudinal and transverse expansion of one of the mold parts relative to the other. The holders are designed to be attached to platens of a press.

Abstract: A seepage system for an injection molding apparatus includes a manifold plate with a first portion and a second portion abutting the first portion, and a seepage passage positioned between the first and second portions. The second portion may have at least a portion of a melt passage, and the seepage passage may have an outlet. The seepage system also has one or more seepage channels, with each seepage channel being connected to and in communication with the seepage passage. Moreover, the seepage system includes one or more seepage bores for receiving the flow of excess material, with each seepage bore being connected to and in communication with one of the seepage channels. Gravity is used to assist the flow of excess material from the one or more seepage bores through the seepage channels and the seepage passage.

Abstract: An external stabilizer employed in a plastic film blowing apparatus stacks of swing arm members that create an iris aperture for the extruded film bubble. A tubular die, fed with a supply of molten thermoplastic polymer, extrudes a tube of the molten polymer and injects air into the extruded tube to inflate the tube into a bubble. The wall of the tube expands into a film of a desired thickness; and the tube is drawn vertically upward and collapsed and flattened. The external stabilizer has a frame surrounding the extruded tube above the die. A plurality of swing arms arranged on said frame define the iris aperture. Each of the swing arms is an elongated extrusion of a light-weight material having one end mounted pivotally on the frame and a free end. The swing arm has a mushroom-shaped profile that is rounded on a side that faces the extruded tube. Wear resistant material is disposed on the front surface.

Abstract: A double-walled thermoplastic article includes a double-walled body having inner and outer walls and an insert having visible portions and recessed runner sections. The body includes an insert portion in which its inner and outer walls are contiguous. The insert is attached to the body insert portion such that the visible portions of the insert are exposed and the runner sections are embedded within the insert portion. The article can be produced by a double-walled blow molding process.

Abstract: Provided is a swing-driving device for driving two low molding units so as to swing around corresponding swinging fulcrums, each of the blow molding units having a carriage, one end portion of which is supported by the swinging fulcrum so as to swing, and a blow molding mold disposed on the carriage. The blow molding mold of one blow molding unit receives a parison on a common receiving position and is made to be an mold close state. The blow molding mold swings around a swinging fulcrum, and moves from the receiving position to a shunting position via a detaching position. Thereafter, the blow molding mold returns to the detaching position and is made to be a mold open state. A hollow article formed by blow-molding the parison in the blow molding mold is take out and moved to the receiving position kept in the mold open state.

Abstract: A water jacket assembly for use in injection mold systems, and particularly with heterocavity injection mold systems. The water jacket assembly comprises a sleeve construction of material with high heat-transfer properties. A conduit is beveled into the outside perimeter of the sleeve forming a circulation channel. The inside perimeter of the sleeve is fashioned to receive an individual injection mold. A mold base slideably received the water jacket and cooling fluid is circulated from the mold base through circulation channel in the water jacket, and then back to the mold base. A fluid input plug and fluid output plug extend from the mold base and are received by the apertures in the individual mold for additional cooling.

Abstract: The invention relates to a combustion process for burning a fuel, in which the point of injection of each main oxidizer jet (7, 8) with respect to the point of injection of a fuel jet (4) closest to it is arranged a distance D away satisfying the following relation: D A > 5 ⁢   ⁢ and / or ⁢   ⁢ D B > 5 D being the minimum distance between the outer edge of the relevant oxidizer jet (7, 8) and the outer edge of the fuel jet (4) closest to it, at their respective points of injection, A and B being, respectively, the cross section of the main jet (7, 8) of the oxidizer and the cross section of the fuel jet, considered at their respective points of injection.

Abstract: A liquid fuel burner has a wick for drawing up by capillarity of a draw-up section liquid fuel composed mainly of alcohol contained in a fuel tank and for burning it at a tip flame-producing section, a wick holder for holding the wick, an igniter for lighting the wick and a closure cap for preventing evaporation capable of sealing the wick openably and closably, and a flame-producing section of the wick is made noncircular in cross-sectional shape to increase the surface area exposed above the wick holder.

Abstract: An additional active safety switch for gas burner with active restoring capability is provided to actively prevent the ignition trigger of the gas burner from being pulled arbitrarily or from keeping enabled constantly for enhancement of security.

Abstract: An ignitor for use with an industrial oxy-fuel burner, the ignitor being able to ensure ignition of a pilot flame in order to enable automatic ignition of an oxy-fuel burner. The ignitor is characterized by two tubes, one inside the other, concentrically arranged with respect to an electric ignitor rod at the center, the tubes and the ignitor rod forming two annuli for the delivery of oxygen and fuel gas from their respective manifolds to an open end of the tubes for ignition by the ignitor rod. The manifolds are each formed from a single piece of material. The ignitor rod is removable from the rest of the ignitor assembly by means of a pipe-threaded adapter at the rear of the assembly.

Abstract: A burner for generating a hot gas including at least two hollow partial bodies stacked inside each other in a downstream air flow direction. The center axes of the hollow bodies extend offset to each other such that burner slits formed by adjoining walls of the partial bodies form tangential air inlet channels for an inflow of combustion air into an inside chamber defined by the partial bodies. The hollow bodies are provided with a plurality of baffles projecting into the downstream air flow. The plurality of baffles add an axial turbulence force to the air flow.

Abstract: An improved rotary hearth furnace having a cylindrical enclosure containing a radially moving belt for transporting pellets containing metal oxide and carbon is disclosed. One or more oxy-fuel burners preferably having a flat flame shape are positioned so as to provide a mixture of fuel and oxidant to the pellets countercurrent to the direction of the pellets. The oxy-fuel burners are operated so as to provide a pre-determined quantity of oxygen in addition to that necessary for combustion so that the additional oxygen oxidizes the carbon monoxide and hydrogen present in the hot combustion gases. Oxygen injectors may also be used to introduce additional oxygen into the furnace.

Abstract: A speculum (200) for large animals (100) includes an elongated member (20) that extends into the animal's mouth and terminates in a pliable mouthpiece (18) that rests between the animal's molars (110) and (120), or (130) and (140). An outer portion (20) that extends alongside the animal's cheek terminates in a handle (30) which may be held by hand or attached to a halter (52).

Abstract: After immobilizing a bovine, a harness is placed about the head of the bovine to serve as an anchor for a gag. Opposed ends of the gag are secured to the harness to retain the gag across the edentulous gap to maintain the jaws held apart and to restrain movement of the tongue. The anterior mandibular incisors are cleaned and ground into a harmonious plane. After etching the ground incisors, a bonding polymer mixture is injected into the inner proximals and additional bonding polymer mixture is placed within a mold for encapsulating the incisors. Upon positioning the mold upon the incisors, excess bonding polymer mixture is forced out intermediate the gumline and the edges of the mold. After the bonding polymer mixture has cured, the gag and harness are removed and the bovine is released. If the mold is not to become a part of the overdenture, it is removed after the bonding polymer mixture has cured.

Abstract: The present invention is a thermoelectric device and method designed to create a martensitic state in a shape memory alloy. The invention allows for prolonged use without overheating, and is more less expensive and easier to use than current art. The device is comprised of a cooling tip that is made of a thermally conductive material in contact with the thermoelectric module powered by an external DC converter. A heat sink is in thermal contact with the heating face of the module with cooling fins to draw heat away from the module. A continuous supply of cooling gas or liquid flows over the cooling fins or liquid channels to further cool the module. The DC power supply is controlled by a pneumatic device that will only operate under positive gas pressure, thus ensuring proper cooling of the heat sink of the invention. The cooling tip extends from the front end of an insulating body, the body having a threaded chucking hold for easy removal and changeout of the cooling tip.

Abstract: The invention provides a heat formable tray having a bite block and a method of forming the tray to a patient and forming a final impression in a single visit to the dental office by the patient. A custom fitting variable dimension bite registration dental impression tray, is provided which includes a bite registration member, and a dental impression tray. The dental impression tray comprises a heat adjustable material having a softening point above 38 ° C. and below 120 ° C. The variable dimension bite registration dental impression tray is used in a method for making an impression of dental tissue, comprising the steps of: a) providing a variable dimension bite registration dental impression tray, b) heating the dental impression tray to softened state, c) adjusting the dimensions of the dental impression tray, d) cooling the heat adjustable material so that it solidifies; and e) enveloping the tissue with the dental impression material, whereby a final dental tissue impression is obtained.

Abstract: A filter for spray ducts of dental or surgical handpieces, wherein transfer of media from a coupling hose to the handpiece takes place through a plurality of small openings in an essentially cylindrical portion of the coupling hose of the handpiece, wherein the size of the openings determines the filtering properties. The essentially cylindrical portion has a collection duct located radially outside of the filter openings, wherein the collection duct is connected with a spray line.

Abstract: An anchoring element to be screwed into a hole made in a jaw bone comprises a threaded part with a conical portion and one or more recesses in order to form a cutting edge in each recess. Thread-turn parts starting from each cutting edge are lowered vertically at the rear where they merge with a relief arranged at a distance from each cutting edge. The relief surface is arranged on the conical portion where it extends essentially parallel to a plane tangential to the conical portion.

Abstract: A dental composition useful for an artificial tooth and an artificial tooth with use of the said dental composition by which color stability, coloring resistance and aesthetic merit can be maintained for a long period of time and which have superior characteristics such as bending strength, impact strength, hardness and wear resistance The dental composition comprises (A) at least one monomer and/or oligomer selected from methacrylates and acrylates, (B) an uncrosslinked polymer selected from the group consisting of homopolymers of methacrylates, acrylates and styrene; copolymer of at least two monomers selected from methacrylates, acrylates and styrene; mixture of the homopolymers, mixture of the copolymers; and mixture of the homopolymer(s) and the copolymer(s), (C) a crosslinked polymer selected from the group consisting of homopolymers of methacrylates, acrylates and styrene; copolymer of at least two monomers selected from methacrylates, acrylates and styrene; mixture of the homopolymers; mixture of the

Abstract: The present invention concerns the integration of laser engagement systems such as the MITS and MILES laser systems with standard two dimensional silhouettes, thereby creating a silhouette which can be defeated by laser fire. A laser enhanced silhouette allows live fire target systems (infantry systems and armor systems) to be engaged and defeated with the use of MILES laser Code. The laser enhanced silhouette replaces the plywood or plastic live fire silhouette which is normally utilized on live fire target systems. By connecting the laser enhanced silhouette electronics to the live fire target system's hit sensor electrical connection, the live fire target system can be engaged by laser equipped weapons.

Abstract: A visual display system and method for full and realistic stimulation of night vision goggles according to the present invention includes a display system for stimulating night vision goggles across a large dynamic range. The display system includes a high resolution head tracked area of interest display for a rear projection video display. The system time multiplexes the display of raster and calligraphic images in the area of interest. The system also includes a method of calligraphic light point projection that conserves power by using a head tracked slow speed high sensitivity electromagnetic deflection system to position an electron beam which is modulated in X-Y position in a calligraphic fashion by a high speed secondary yoke to create intense light point images for the area of interest display.

Abstract: A system for establishing a data session and a voice session for training a user on a computer program includes a customer workstation coupled to a selected agent workstation by a data network and a voice network. The customer workstation generates a session request in response to user input requesting assistance regarding the computer program. The data network and the voice network establish a data session and a voice session, respectively, between the customer workstation and the selected agent workstation in response to the session request.

Abstract: The present invention is an apparatus and method of educating the fundamentals of numbers and/or mathematics. The apparatus is designed to replicate mathematical problems appearing on books and other media and includes a base having a front surface. This front surface includes a plurality of recesses, oriented in a column fashion. Each column represents the one's, ten's, and hundred's. The recesses receive numerical plates which are sized according to the specific column. An operator recess for receiving an operator plate is also provided to enable mathematical process to be performed by a user.