Abstract: A connecting apparatus adapted in a conjunctive structure is provided. The conjunctive structure comprises a baseboard, a peripheral element and a connecting apparatus. The connecting apparatus comprises at least one first connecting element and at least one second connecting element. The first connecting element is a magnetic element and is placed on one corner of the peripheral element. The second connecting element is placed around a hole of the baseboard, and the second connecting element comprises two adjacent magnetic elements with opposite polarity arrangement.

Abstract: A system for reducing the particle size of a pozzolan includes a thermal fracture system and a defracturing apparatus. The system is highly efficient at drying and heating a natural pozzolan having a natural distribution of particle sizes. The system can create a reduced-size pozzolanic material with a desired particle size and particle morphology. The system for reducing the particle size of a pozzolan includes a thermal fracture system for heating and thermally fracturing the pozzolan and a defracturing apparatus that agitates the thermally fractured pozzolan to break the thermally fractured pozzolan apart.

Abstract: The present invention provides for a method and apparatus for breaking mineral particles comprising suspending the particles in a liquid flowing in a conduction path, the liquid comprising a dielectric constant higher than the particles and wherein an electric voltage pulse is sent to electrodes to pass an electric field in the mineral particles with sufficient stress to fracture the mineral particles.

Abstract: A method for processing unseparated egg shells is provided. The method includes placing the unseparated egg shells in a fluid tank containing a fluid mixture, applying cavitation to the fluid mixture to thereby assist in separating the egg shell membranes from the egg shells, and recovering the egg shell membranes. Preferably, the fluid mixture is recirculated to thereby provide for continuous processing of unseparated egg shells. The method may further include drying the egg shell membranes to produce dried egg shell membranes which may then be vacuum packaged for storage and/or transport. The dried egg shell membranes may then be subjected to an extraction process for extracting at least one type of polypeptide from the egg shell membranes. Collagen, hyaluronic acid, or amino acids of interest may be extracted from the egg shell membrane and purified for numerous uses.

Abstract: A to-be-treated body, which contains raw material particles 5 of a substance and with which a solvent 4 of a to-be-treated liquid 2 is made solid, is used, and a laser light source 10, which supplies a laser light of a predetermined wavelength to a treatment chamber 3 that contains the to-be-treated body, is provided to arrange a production apparatus 1A. The laser light from the laser light source 10 is illuminated onto the to-be-treated body to microparticulate the substance in solvent 4. As the to-be-treated body of solid form, a solidified body 6, with which water 4 is solidified by a cooling device 50 and the solidified state is maintained by a thermally insulating layer 30, may be used. Or, as the to-be-treated body, a gel body, with which the solvent is gelled, may be used. The substance can thereby microparticulated efficiently by photo-pulverization.

Abstract: In order to manufacture the compound powder or the porous granulated substance in an efficient manner, a powder processing apparatus has an accumulating face on which the processing target powder is to be accumulated and a processing face disposed in opposition to the accumulating face and convexly curved, and a moving means for moving the accumulating face and the processing face along the accumulating face relative to each other. The apparatus comprises an excitement treatment means capable of applying an excitation energy to the processing target powder accumulated on the accumulating face from an excitation energy supplying portion disposed in opposition to the accumulating face or an oscillation means for oscillating the accumulating face or the processing face in a direction intersecting the accumulating face.

Abstract: Systems and methods for fluidization of particle and/or powder systems with reduced generation of static electricity are disclosed. The systems/methods are particularly advantageous for fluidization of nanoparticle and/or nanopowder systems, where the generation and/or presence of static electricity is a significant fluidization issue. The systems and methods generally involve the addition of an alcohol or other solvent to a fluidization gas to be introduced to the fluidization chamber, e.g., by bubbling the fluidization gas through a volume of solvent/alcohol, to advantageously reduce the build up of electrostatic charge. Systems and methods for capturing in-situ images within a fluidized bed are also provided that involve reducing the electrostatic charges generated within the fluidized bed and introducing a particle vision and measurement (PVM) probe to the fluidized bed for image capture.

Abstract: Grinding system (1) comprising a grinding mill (2) and a reload cartridge (3) containing a material to be ground (37) and adapted to be removably mounted on the grinding mill. The cartridge has a closure member (33) which is opened by an opening member (18) of the grinding mill when the cartridge is coupled to the grinding mill.

Abstract: The present invention is Micro-erosion Recovery System for separating recyclable tire materials (rubber, steel and fiber) and complying with quality standards governing the use of recovered tire materials. It is also a highly efficient apparatus and system for producing large amounts of high quality crumb rubber and steel.

Abstract: A lubricating pack specifically designed for paper shredders, including a piece of oiled paper saturated with lubricant placed between two jackets that are each provided at an inner layer thereof with an oil-seepage-proof film. The two jackets are then formed with a first seal sealed around their peripheries to form a lubricating pack having a laminating construction. The lubricating pack is fed into the paper shredder through a paper inlet to the paper shredder under auto mode to be shredded by the paper shredder. Accordingly, the cutting blades of the paper shredder would be able to contact the lubricant contained in the oiled paper during the process of shredding the lubricating pack, so as to provide lubrication between cutting blades of the paper shredder thereby extending the lifespan of the paper shredder.

Abstract: Tree stump grinding teeth for use in tree stump grinding wheel assemblies and tree stump grinding wheel assemblies that include one or more such grinding teeth. In the preferred embodiment of the invention, the grinding tooth includes a mounting base having a substantially flat surface from which a plurality of cleats project. The cleats are adapted to be received in corresponding bores formed in the wheel. A resilient impact pad is positioned between the mounting base of the grinding tooth and the wheel. The resilient impact pad protects the surface of the wheel from impact forces applied to the grinding tooth.

Abstract: A cordless electric condiment grinder includes a hollow housing elongated to extend between a base for supporting the grinder uprightly and an opposing top, the top of the housing having a bulbous form to define a condiment reservoir. A rotary grinding mechanism is disposed in a lateral opening in the top of the housing and a tilt switch controls operation of the grinding mechanism, allowing freshly ground condiment to be dispensed automatically upon rotating the grinder through an acute angle and thus is particularly suited for use by people with limited dexterity.

Abstract: A method and apparatus for vacuum cooling heated viscous and/or high solids mixtures employs at least one cooling tank (1) having inwardly sloping side walls (15) from a top (14) to an opening that is attached to a outlet pump or valve (7) located at the tank bottom, a rotational spreader (8) near the top and at least one vacuum pump (5, 6) to maintain the predetermined vacuum in the tank, and input and output pumps (20, 21). The rotational spreader (8) breaks up the heated viscous and/or high solids mixture (9) and distributes it onto the side walls of the tank to form a film (10) which is cooled as it travels to and slides down the sides to the bottom where the viscous and/or high solids mixture is outputted from the tank by a pump or valve (7, 21, 26). Multiple stages of the apparatus may be employed preferably with progressively greater vacuum pressure in each stage to accomplish even further cooling of the viscous and/or high solids mixtures.

Abstract: The invention provides a device for destroying sheet material, comprising shredding means (2) for shredding the sheet material and a feed conveyor system (3) for feeding sheet material to be destroyed to the shredding means from a feed location, wherein the feed conveyor system is arranged for feeding sheet material to be destroyed to the shredding means from a number of different feed locations (4). The invention further provides a system for sorting and destroying sheet material.

Abstract: A method for the disintegration and tribochemical activation of especially inorganic materials having a crystalline structure, wherein the starting materials are comminuted (disintegrated) to a particle size of less than 1 ?m by the effect of impacting pressure fronts at a pulse duration of less that 10 ?s and a sequence frequency of more than 8 kHz. A conglomerate of activated mixed crystals is then obtained having an increased aptitude for the formation of modified crystals when water is added. The duration of the effect of the impacting pressure fronts continues until the crystal lattice structure of the particles is destroyed. A device for the disintegration and tribochemical activation of said materials is based on rotating disks whereon molded bodies with aerodynamic profiles are arranged, the molded bodies being continuously displaced in a transonic speed range and impacting pressure fronts being produced on the outflow surfaces thereof.

Abstract: The assembly of an electrodynamic fractionating unit, for the fragmentation, milling or suspension of a brittle, mineral process material is disclosed. The energy store including the output switch/spark gap thereof, the electrodes including the supply line and the reaction vessel are each arranged at least within the protection of the electrically necessary insulating separation of regions of differing electrical potential, completely enclosed in a volume of the encapsulation, having electrically-conducting walls. The wall thickness of the encapsulation is at least equivalent to the penetration depth, corresponding to the lowest components of the Fourier spectrum of the pulsed electromagnetic field. The electrode at reference potential is connected to the ground side of the energy store through the encapsulation wall. The electrode at high voltage is connected by the shortest path to the output switch on the energy store.

Abstract: A distributor plate adapted to be releasably mounted on a horizontal lower disc of a rotor of a vertical shaft impact crusher. The rotor has an opening for the intake of material to be crushed and at least one outflow opening for material leaving the rotor. The distributor plate is an equilateral polygon as seen from above.

Abstract: A high frequency disintegrator includes a plurality of high frequency vibration generators, a plurality of connectors, and at least a heat exchanger. The high frequency vibration generators each have an operational portion that axially outputs high frequency vibration energy. The connectors are respectively connected to the high frequency vibration generators, and each include an action portion for allowing the operational portion to axially output the high frequency vibration energy, an inlet, and an outlet, wherein the inlet and the outlet are connected to the action portion. The connectors are connected in series. The heat exchanging device dissipates heat from the connectors. The high frequency disintegrator eliminates the drawbacks of the conventional techniques.

Abstract: The present invention is a pouch for crushing a tablet or pill, that features a containment portion for containing a tablet or pill while being crushed into a powder without loss of the powder, the containment portion having a slanted bottom adapted to direct the powder toward a focal point along the bottom, and at least one perforation along a line intersecting the bottom above the focal point.

Abstract: Disclosed herein is a food garbage disposer including: a reaction vessel which includes a hopper into which food garbage is introduced, a heating tank filed with heat-medium oil to heat the hopper, and at least one heater to heat the heat-medium oil in the hopper; an automatic filter which includes an automatic injection nozzle and filters vapor discharged from the reaction vessel; a condenser which condenses the vapor passed through the automatic filter and separate the vapor into condensed water and air; a condensed-water purifier which purifies the condensed water produced by the condenser and supplies the purified water to the automatic injection nozzle of the automatic filter; a deodorizer which purifies and deodorizes the air produced by the condenser; and an air circulation adjuster which mixes the air passed through the deodorizer with external air and reintroduces the mixed water into the reaction vessel.

Abstract: A production apparatus which includes: a treatment chamber, containing a to-be-treated liquid, made up of water, which is a solvent, and raw material particles of a substance; a laser light source, illuminating laser light for microparticulation onto the to-be-treated liquid; an ultrasonic transducer, irradiating ultrasonic waves for preventing aggregation of microparticles; and a controlling device, controlling the laser light illumination by the laser light source and the ultrasonic wave irradiation by the ultrasonic transducer. A vibration amplitude of the treatment chamber is monitored by means of a microphone and a vibration amplitude measuring device to set the frequency of the ultrasonic waves to a resonance vibration frequency. A microparticle production method and production apparatus that enable substances to be microparticulated efficiently by photo-pulverization, and microparticles are thus realized.

Abstract: The present invention provides an impact crushing apparatus that includes a chamber for receiving material, a rotor assembly disposed within the chamber, a drive unit operably coupled to rotate the rotor assembly, and a plurality of anvils positioned around the rotor assembly and configured to break apart the material.

Abstract: The invention relates to working electrode for an electrodynamic fragmenting installation. The working electrode comprises an insulator (1) with a central conductor (2), which axially passes through the insulator (1) and carries at its working end an electrode tip (3) which is formed by an exchangeable changing part (4) and adjoins a stop area (6) of the central conductor (2) with a contact area (5) under axial compressive prestress. The invention makes it possible to provide working electrodes for electrodynamic fragmenting installations in which the electrode tips can be exchanged in a simple manner and which can be operated practically without maintenance over a long period of time even in case of great pressure pulsations.

Abstract: A method for converting a tablet containing medication into a palatable fluid includes the steps of adding a palatable fluid to a container, placing the tablet containing the medication and then disintegrating the tablet/fluid combination until the table is disintegrating the tablet/fluid combination until the tablet is disintegrated and dispersed throughout the palatable fluid for forming a palatable mixture in the container for ingestion by a patient. An apparatus for carrying out the method uses either an ultrasonic device, such as a ultrasonic probe, or a crushing device for disintegrating and dispersing the tablet throughout the palatable fluid.

Abstract: An automatic lens cutting machine (1) includes a body portion, a carrying device (10), a cutting device (20), a take out device (30), a power device and an electrical control portion. The take out device is mounted adjacent to the carrying device, and comprises a shelf (31) mounted on a base (40) of the body portion and a lens receiving device (34) disposed above the shelf. The lens receiving device has a plurality of rows of tubular rings. Each row has a plurality of rings. The rings receive unseparated lenses (90) on a semi-finished lens assembly (9) therein when the automatic lens cutting machine is in operation, and retain the separated lenses therein after the semi-finished lens assembly is subject to a cutting operation.

Abstract: Method and device are for recycling wornout tires and other industrial and domestic wastes. According to a method for shredding wornout tires a package of wornout tires is formed as a number of closely compacted layers. The package is subjected to primary destruction in an armored chamber under conditions of free extension until the package outside layers are destroyed. The overall dimensions of the armored chamber in any cross-section thereof perpendicular to the chamber axis and passing through the package of the compacted tires varies within the range of from 2 to 7 package diameters in such section. The compact package of tires is formed from a few coaxial helical twists having an axial hole. Accordingly, a stress-strain state is established upon free extension of a rubber layer without its contacting with the walls of the armored chamber, whereby efficient destruction and disintegration of the rubber, metallic and textile cord of a tire is attained.

Abstract: A process for the milling of a nuclear graphite contaminated with radioelements includes subjecting the graphite, immersed in a liquid medium, to high-voltage pulses. The liquid medium has a resistivity such that, owing to the effect of the energy conveyed by the said pulses, electric arcs are initiated and, upon contact with the graphite, break the carbon-carbon bonds that make up the graphite. The number of high-voltage pulses is set so as to obtain a given particle size.

Abstract: The invention is a laboratory mill that allows small samples to be shaken, mixed, ground, homogenized or comminuted effectively within a small vial. The design is similar to a planetary mill but unlike those devices, neither axis of rotation is centered on the axis of the processing vessel. The design allows many vials to be processed at one time and even when the diameter of the vial is quite small, maintains the processing performance. The performance of the device when used as a comminuter is demonstrated showing that the device can comminute organic solids down to a median particle size of 1 micrometer with a narrow size distribution. Because the processing takes place within a vial, the mill does not require cleaning between samples which allows the application of the device in automated or high throughput systems.

Abstract: An improved feed roller assembly wherein the feed roller provides a force perpendicular to the feed direction of the brush material. In a first embodiment, cleats that are not parallel to an axis of rotation of the feed roller are affixed to a periphery of the feed roller. When the feed roller is oriented with its axis of rotation in a substantially vertical position, each cleat is arranged with its upper end ahead of its lower end, in a direction of rotation. This configuration provides a downward force on the logs or brush being fed into the chipper, thereby reducing the occurrence of bucking. In an additional embodiment, the axes of rotation of the feed rollers lean toward the outfeed end of the brush chipper.

Abstract: The present invention relates generally to a shutoff mechanism for shredders. The shredder has a shutoff button coupled to the on/off switch whereby activation of the shutoff button results in the on/off switch switching to the off position thereby shutting off power to the shredder.

Abstract: A lubricating pack specifically designed for paper shredders, including a piece of oiled paper saturated with lubricant placed between two jackets that are each provided at an inner layer thereof with an oil-seepage-proof film. The two jackets are then formed with a first seal sealed around their peripheries to form a lubricating pack having a laminating construction. The lubricating pack is fed into the paper shredder through a paper inlet to the paper shredder under auto mode to be shredded by the paper shredder. Accordingly, the cutting blades of the paper shredder would be able to contact the lubricant contained in the oiled paper during the process of shredding the lubricating pack, so as to provide lubrication between cutting blades of the paper shredder thereby extending the lifespan of the paper shredder.

Abstract: A venturi receives incoming material through an inlet tube and subjects the material to pulverization. The material, as it undergoes pulverization, is further subject to moisture extraction and drying. An airflow generator, coupled to the venturi, generates a high speed airflow to pull the material through the venturi and into an inlet aperture in the airflow generator. The airflow generator directs the received pulverized material to an outlet where the material may be subsequently separated from the air.

Abstract: A pill crusher pouch, dimensioned to be received between a platen and anvil of a pill crusher wherein the anvil is integrally fixed to a base and wherein the platen is coupled to said base through a moveable handle, is constructed a seamless tube of flexible material having an open top and a closed bottom, wherein the closed bottom is formed a cup like seal that provides the pouch with a cornerless interior that facilitates easy pouring of pulverized material from the interior of the pouch.

Abstract: The device consists of a paper guiding part formed by a pair of substantially parallel plates spaced with a slot for guiding the paper and a flange for attachment to the shredder. The paper guiding part of the chute may be hinged to the flange for tilting the guiding part into an inoperative position, when necessary. In order to hold the chute in an operative, i.e. upright position, the device is provided with a support member that is pivotally connected to the rear side of the chute. For holding the chute in the upright position, the free end of the support member bears against a stopper provided on the flange.

Abstract: In a process reactor and a method for the electro-dynamic fragmentation of lumpy mineral materials by pulsed high voltage discharges, including a reaction chamber with a funnel-like bottom having a central outlet, an axially movable high-voltage electrode extending from the top into the reaction chamber and having a front end disposed opposite the central outlet where another electrode which is at an electric reference potential is disposed, the outlet converges into a tailback tube below which a transport unit for the controlled removal of the processed fragmented material sinking down through the tailback tube is disposed, a material supply arrangement extends to an opening in the wall of the reaction chamber and a material flow blocking structure is disposed in the reaction in front of the material inlet opening for controlling the material admission to, and the fill level in, the reaction chamber.

Abstract: A method for treating vulcanized rubber, the method including the steps of (i) providing an aqueous stream that includes vulcanized rubber particles suspended in water, (ii) feeding the aqueous stream to the top of a hydraulic downdraft column, (iii) conducting the aqueous stream to the bottom of the hydraulic downdraft column, (iv) conducting the aqueous stream into an ultrasonic treatment zone, (v) subjecting the aqueous stream to ultrasonic energy and, (vi) conducting the aqueous stream up a hydraulic updraft column.

Abstract: A lifting wall for a tube mill which has a discharge means with lifting vanes in order to transport the material being ground to discharge openings by the rotary movement of the tube mill. The lifting vanes are disposed obliquely with respect to the radial direction so that the material being ground slides promptly to the center where it is discharged through the discharge openings still below the horizontal longitudinal central plane of the tube mill. The lifting vanes are substantially flat and bent like blades in a region of the discharge openings.

Abstract: A venturi receives incoming material through an inlet tube and subjects the material to pulverization. The material, as it undergoes pulverization, is further subject to moisture extraction and drying. An airflow generator, coupled to the venturi, generates a high speed airflow to pull the material through the venturi and into an inlet aperture in the airflow generator. The airflow generator directs the received pulverized material to an outlet where the material may be subsequently separated from the air. An acoustic emission sensor receives the resonant frequencies generated by material passing through the airflow generator. The resonant frequencies reflect a material flow rate that is adjusted to avoid an overload situation. An automatic balancer system couples to an axel rotating the airflow generator to provide balance, improve efficiency, and eliminate cavitation.

Abstract: An apparatus and a method for modifying the surface of a polymer powder utilizes a rotational ultrasonic treatment that pulverizes polymer materials, such as rubber, waste rubber, and plastics, and modifies the surface, so that the polymer materials can be recycled more efficiently. A hopper feeds the pulverized polymer powder. A rotor which is linked to the bottom of the hopper as an integrated body, is linked to a driving mechanism through a power transfer device, and rotates drive. A rotating disk is linked to the bottom of the rotor as an integrated body, and is provided with a downsloped plane. A shaft extends through the hopper, the rotor, and the rotating disk, and discharges the polymer powder fed from the hopper out of the bottom of the rotating disk. An ultrasonic vibrator is positioned at the bottom of the rotating disk, and modifies the polymer powder fed by the shaft using ultrasonic waves.

Abstract: A venturi receives incoming material through an inlet tube and subjects the material to pulverization. The material, as it undergoes pulverization, is further subject to moisture extraction and drying. An airflow generator, coupled to the venturi, generates a high speed airflow to pull the material through the venturi and into an inlet aperture in the airflow generator. The airflow generator directs the received pulverized material to an outlet where the material may be subsequently separated from the air.

Abstract: A venturi receives incoming material through an inlet tube and subjects the material to pulverization. The material, as it undergoes pulverization, is further subject to moisture extraction and drying. An airflow generator, coupled to the venturi, generates a high speed airflow to pull the material through the venturi and into an inlet aperture in the airflow generator. The airflow generator directs the received pulverized material to an outlet where the material may be subsequently separated from the air. An acoustic emission sensor receives the resonant frequencies generated by material passing through the airflow generator. The resonant frequencies reflect a material flow rate that is adjusted to avoid an overload situation. An automatic balancer system couples to an axel rotating the airflow generator to provide balance, improve efficiency, and eliminate cavitation.

Abstract: An apparatus for disintegrating waste matter preferably comprising a holding area for holding waste matter; and a fluid delivery mechanism for applying high pressure fluid to the holding area, wherein the high pressure fluid disintegrates the waste matter and applies a force sufficient to hydromechanically sever the waste matter. The holding area preferably includes a container bin having a bottom surface and an outer wall. Alternatively, the apparatus is a hand held device. An outlet port coupled to the bottom surface, wherein the disintegrated waste material exits the container bin via the outlet port. A fluid source coupled to the fluid delivery mechanism. The fluid delivery mechanism comprises at least one nozzle for applying a stream of highly pressurized fluid to the waste. The nozzle preferably includes a zero degree nozzle tip The fluid delivery mechanism comprises a column or a disk manifold, wherein the nozzle extends therefrom.

Abstract: A cover assembly for a food processor having a cover cooperative with a working bowl or container, an accessory being selectively cooperative with at least one cavity in the cover, a safety system including a disengaging assembly cooperative with the cover and/or the accessory to selectively deactivate or disengage the safety system. The cover and the accessory can be simultaneously separated and/or removed from the food processor or adjusted relative to each other and/or the food processor.

Abstract: A method and device for performing lysing on a cell-containing fluid, in which the fluid flows through a vibrating micromachined tube to physically rupture the cell walls (mechanical lysis), and/or to mix, agitate or homogenize the fluid during chemical lysis, and/or to mix, agitate or homogenize the lysate for analysis or other processing after lysing. The tube includes a freestanding portion spaced apart from a surface of a substrate on which the tube is formed. The device further includes means for vibrating the freestanding portion of the tube at a level sufficient to rupture the walls of cells in a fluid flowing through the freestanding portion (for mechanical lysing) or to mix the fluid and a chemical lysing additive within the freestanding portion (for chemical lysing).

Abstract: A method of destroying signals stored on a compact disk includes the step of destroying a Start Lead In (SLD) area on a compact disk to ruin lead-in signals recorded on the SLD, such that all other data stored on the compact disk cannot be read. Undesirable disclosure of the data stored on the compact disk is effectively prevented when the compact disk is discarded after the SLD is destroyed.

Abstract: A dual nozzle hydro-demolition system is mounted on a robot vehicle having a tower, with the robot vehicle and tower permitting the device to be positioned in any desired location on a vertical wall surface. The robot vehicle includes a plurality of tires and a motive power system allowing it to be moved to a desired location. Bearing pads are mounted on jacks allowing the tires of the robot vehicle to be elevated slightly off the ground to preclude undesired movements. A carriage is slidably mounted on a beam and carries dual nozzles, each of which is connected to a supply of high pressure water via a heavy duty hose. The nozzles are rotated using a hydraulic motor. A coupling is provided within the flow circuit from the source of water to the nozzle allowing a conduit adjacent the nozzle to rotate with respect to a conduit receiving water from the source thereof, so that each nozzle can be rotated without any water leakage.

Abstract: A container for blender includes a cup and a stainless steel hollow cylindrical member. The cylindrical member has an L-shaped upper rim and an annular bottom having an L-shaped inner edge. The cylindrical member is integrally fitted in a lower part of the cup when the latter is injection-molded with the L-shaped upper rim and the L-shaped inner edge of the annular bottom imbedded in peripheral wall and bottom wall of the cup, respectively. The cylindrical member protects the cup against direct contacting with and colliding by rigid materials being crushed in the cup, and accordingly eliminates tiny chips of the cup that would otherwise be produced due to such colliding.

Abstract: An apparatus for disrupting cells or viruses comprises a container having a chamber for holding the cells or viruses. The chamber is defined by at least one wall having an external surface for contacting a transducer device. The transducer device has a vibrating surface for contacting the wall and for vibrating at an operating frequency and amplitude sufficient to generate pressure waves or pressure pulses in the chamber. The transducer device is coupled to the wall with a preload force sufficient to create a stress within the wall. The natural frequency of the wall, when the wall is stressed by the preload force, is equal to the operating frequency of the transducer device or differs from the operating frequency by less than 50% of the operating frequency.

Abstract: A pulverizer is disclosed which comprises a fan which sucks air through a pipe. A hopper receives material which is to be pulverized, the hopper having an open lower end which communicates with the pipe. Between the hopper and the fan there is a venturi. Air flows through the venturi at a speed of Mach 1 or above. Pieces of frangible material dropped into the hopper are sucked to the venturi where they are blown apart and reduced to powder.

Abstract: The present invention relates to a method and a device for crushing glass bodies, in which the glass body 18 is arranged in a microwave field 4, so that the said glass body 18 is crushed on account of the resulting thermal stresses. In addition, a local plasma 20, which results in further thermal stresses, is produced on the surface of the glass body 18. Since the glass body 18 to be crushed does not come into contact with crushing means, for example rollers or the like, the pieces of broken glass 22 cannot be contaminated by abrasion particles of the crushing means. The plasma 20 permits a rapid and economic crushing of the glass bodies.