Abstract: An abrasive water jet processing machine for jetting a fluid and performing a cutting includes a fluid supply device, an abrasive supply device, an injection pressure controller, wherein the abrasive supply device includes a reservoir hopper consisting of a pressure vessel for reserving the abrasive, an abrasive supply tube for communicating with the reservoir hopper and the nozzle, and an air purge device for supplying compressed air to the abrasive supply tube and the reservoir hopper; the injection pressure controller performs a two-stage control of controlling injection pressure in a piercing; and the air purge device includes a flow pressure controller for controlling flow pressure of compressed air passing through the abrasive supply tube, wherein the flow pressure controller controls the flow pressure in the piercing to be higher than that in the cutting.

Abstract: A waterjet system selectively produces fluid jets for water jet cutting or abrasive jets for abrasive-waterjet-cutting. The abrasive materials in the abrasive jet are determined based on the properties of the workpiece. The waterjet system includes an abrasive delivery system that is capable of delivering either a single abrasive or a plurality of abrasives as an abrasive blend, to a cutting head assembly. The cutting head assembly entrains the abrasive into a fluid jet to form an abrasive jet.

Abstract: Particle-delivery devices, abrasive jet systems, and associated devices, systems, and methods are disclosed herein. In certain aspects, the particle-delivery devices can include an elongated fluidizing chamber and a metering assembly. The metering assembly can include a particle flow path extending from the fluidizing chamber. The metering assembly can also include a carrier-gas passage extending to an injection orifice proximate the fluidizing chamber. The metering assembly can be configured to inject carrier gas into the fluidizing chamber to fluidize particles within the fluidizing chamber. Fluidizing the particles at different carrier-gas pressures and/or flow rates can change the rate of particle delivery. For example, the metering assembly can include a metering opening and a regulator configured to change a steady-state pressure and/or flow rate of carrier gas entering the fluidizing chamber.

Abstract: Systems and methods for fluidizing an abrasive particulate material for an abrasive water jet are disclosed herein. In one embodiment, the abrasive material is delivered to a metering orifice in a distributor. Pressurized pulses of air can be directed around a circumference of the distributor to at least partially fluidize the particulate material to facilitate the material passing through the metering orifice. From the metering orifice, the abrasive particulate material is entrained in a water jet for a cutting procedure or other suitable application.

Abstract: A particle blast cleaning apparatus incorporates a pressurized container which is pressurized by the transport gas upon start up through a feeder which does not comprise an airlock. The feeder introduces the blast media into the transport stream. At start up, the transport gas pressurizes the container, flowing upwardly through the feeder until the container is substantially pressurized and the flow substantially ceases. The feeder rotor may be configured to crush or grind the particles.

Abstract: Various embodiments of abrasive jet systems are described herein. In one embodiment, an abrasive jet system includes an abrasive container and a nozzle assembly. The nozzle assembly has a mixing region or cavity and an abrasive inlet. The abrasive jet system can also include an abrasive supply conduit that is operably coupleable between the abrasive container and the abrasive inlet. The abrasive supply conduit includes a first interior surface portion configured to be positioned proximate to the abrasive inlet and a second interior surface portion, different from the first interior surface portion, configured to be spaced apart from the abrasive inlet. In one aspect of this embodiment, the first interior surface portion has a greater ability to repel fluid (e.g., water) than the second interior surface portion, thereby reducing a tendency of the abrasives to clog the abrasive supply conduit.

Abstract: The invention provides a dosing device for a particulate material blasting apparatus comprising a dosing chamber having a base, a rotor carrying a plurality of circumferentially formed pockets ratably mountable with the chamber, a particulate product feed conduit adapted to feed particulate product onto a base of the dosing chamber adjacent a receiving side of the dosing chamber and a particulate product delivery conduit formed in the base of the dosing chamber adjacent a delivery side of the dosing chamber. The base of the dosing chamber is disposed with respect to the particulate product feed conduit such that particulate material will not spill over the base into the delivery conduit. The rotor is disposed with respect to the feed conduit such that particulate product fed onto the base of the dosing chamber will be picked up by the pockets formed in the rotor and lifted up and around the chamber from a receiving side of the dosing chamber to a delivery side of the dosing chamber.

Abstract: An abrasive supply system may, for example, be used to supply abrasive particles such as garnet to a cutting nozzle of an abrasive jet cutter. According to an embodiment, the abrasive is propelled by a substantially constant flow rate gas source. According to an embodiment, the system may be supplied with abrasive from an atmospheric pressure abrasive hopper. According to an embodiment, a controller automatically actuates refilling of an abrasive tank from the abrasive hopper, and then automatically closes an abrasive supply valve and restarts abrasive propulsion. According to an embodiment, the controller may include or consist of pneumatic logic.

Abstract: A heatless slurry system for use with a glass removal apparatus for restoring a glass surface. The system comprises a slurry container and a pump mounted externally relative to the container to prevent heating of the slurry as the system is operated. Vacuum pressure is created by activation of the pump to promote circulation of the slurry within the tool, thereby allowing the latter to be worked against the surface.

Abstract: An apparatus for cleaning a jet engine includes a supply device configured to make cleaning medium available, a nozzle device configured to introduce the cleaning medium into the jet engine, and a line connection between the supply device and the nozzle device. The cleaning medium can be solid carbon dioxide. A system including a jet engine and the apparatus. A method for cleaning a jet engine using solid carbon dioxide.

Abstract: A micro-abrasive blasting device and method for perturbation control may use a plurality of delivery conduits of various lengths and/or apertures, or a single moveable delivery conduit. The user is able to individually open and close bypass conduit pinch valve(s) external to micro-abrasive blasting device to affect the perturbation intensity internal to the mixing chamber. By selectively opening and closing flow through delivery conduits it is possible to provide a more consistent perturbation rate and select the perturbation intensity internal to mixing chamber.

Abstract: A powder blast tool for mixing a powder with a pressurised gas, having at least one powder reservoir, with supply lines for the pressurised gas, and a discharge line, which is connected to a discharge nozzle, at which a powder-gas mixture and optionally pressurised water are discharged, wherein the powder blast tool can preferably be connected to plural powder reservoirs simultaneously and exchangeably, wherein at least one receiving region with at least one mixture terminal and at least one gas terminal is disposed on the powder blast tool and wherein the powder reservoir has a coupling region for exchangeable connection of the powder reservoir to the powder blast tool. Also disclosed are a suitable powder reservoir and an insert for such powder reservoirs and a corresponding method of dental treatment.

Abstract: The present invention relates to a blasting device for premixed abrasive slurry jet. The device comprise a cylinder, in which defines a hydraulic oil side and a slurry side separated from each other hermetically, and the hydraulic oil side and the slurry side have ports for oil or slurry entry in and out respectively; hydraulic medium feeding system which is connected to the port of the cylinder for oil entry in and out through oil pipe; slurry jet system which is connected to the port of the cylinder for slurry entry in and out through slurry pipe; said cylinder has a sealed bladder to separate the hydraulic oil side and the slurry side. Friction between bladder and body become very little, as the slurry is ejected from the nozzle by utilizing the transformation of the bladder. So service life of the blasting device becomes longer. Furthermore, if the bladder mangles due to wear for use a long time, bladder can be renewed only. It is not necessary to renew the whole cylinder.

Abstract: The invention relates to a device and method for cleaning, activating or pre-treating workpieces by blasting a carbon dioxide snow which is produced from pressurized CO2-containing fluids and at least one type of carrying compressed gas and is accelerated by means of a discharge nozzle (14), wherein a two-phase carbon dioxide mixture of a carbon dioxide gas and carbon dioxide particles is produced in an agglomeration chamber (8) by agglomerating and compressing carbon dioxide snow crystals which are radially added to the carrying gas in a multistage mixing chamber (10, 11, 12) comprising a central jet pipe (4), around which the carbon dioxide mixture circulates and which is used for supplying said carrying gas in such a manner that a high-energy turbulent gas flow for processing a workpiece is obtainable.

Abstract: A multi-station polish system and process for polishing thin, flat (planar) and rigid workpieces. Workpieces are conveyed through multiple polishing stations that include a bulk material removal belt polishing station and finishing rotary polishing station. The bulk of the material is relatively quickly removed at the bulk removal station using a conformable abrasive belt and the workpiece surface is then polished to the desired finish at the finishing station using a conformable annular rotary polishing pad.

Abstract: A particle blast apparatus includes a hopper assembly, which is mechanically isolated from the rest of the particle blast system. Energy is imparted to the hopper by an impulse assembly, which preferably is mounted directly to the hopper. The hopper is mounted to the apparatus on a slide assembly, which allows the hopper to be moved to a second position at which particles may be discharged from the hopper exit away from the particle feeder.

Abstract: A micro-abrasive blasting device and method for perturbation control using a plurality of delivery conduits of various lengths and/or apertures. The user is able to individually open and close bypass conduit pinch valve(s) external to micro-abrasive blasting device to affect the perturbation intensity internal to the mixing chamber. By selectively opening and closing flow through delivery conduits it is possible to provide a more consistent perturbation rate and select the perturbation intensity internal to mixing chamber.

Abstract: The invention relates to a device for comminuting dry ice granules, comprising a housing having a flow channel for dry ice granules which can be applied, by means of compressed gas, to a surface to be cleaned, and also comprising a first comminution member for comminuting the dry ice granules which are to be dispensed. In order to provide a device of this kind with which different degrees of comminution of dry ice granules can be achieved in a simple manner, it is proposed according to the invention that the device has at least one second comminution member which can be disposed in the housing in a position in which a total degree of comminution, which is greater than the individual degree of comminution which can be achieved solely by the first comminution member, can be achieved in combination with the first comminution member. A dry ice dispensing arrangement for dispensing a mixture of compressed gas and dry ice granules is also proposed, having a device of the above kind.

Abstract: A machine for cutting, with a hydro-abrasive jet, materials such as, for example, glass, stone, granite, marble, metal materials in general, and all the materials that can be machined using the aforesaid technology, comprises a cutting head (7) mobile according to one or more axes (X, Y, Z, 11, 13). The head (7) includes a nozzle (8) for the emission of a jet of water under pressure, a pipe (14), extending along a main axis (11) of the head, about which the head is able to turn, for supplying water under pressure to the nozzle, and a duct (19) for supplying an abrasive agent, for example garnet, and adding it to the jet of water under pressure. The duct (19) for the abrasive agent comprises a first duct portion (19a), fixed with respect to the head in the movements of rotation about said main axis (11), and a second duct portion (19b), which is, instead, fixed with respect to said movements of rotation.

Abstract: A centrifugal projecting machine having a house, a driving device disposed at a first side of the housing with a flange, an impeller having a plurality of blades, wherein the impeller is connected to a driving shaft of the driving device with a hub, a distributor disposed in an inner cylindrical space of the impeller so that it is concentrically arranged in relation to the driving shaft, wherein the distributor has slit-like openings that are circumferentially disposed with substantially equal clearances, a control cage having an opening around a distal end for dispersing shot, wherein a proximal end surface of the control cage is connected to the second side of the housing, opposite its first side, around an opening for an intake disposed at its second side, wherein he control cage is disposed with a clearance between inner ends of the blades and an outer surface of the distributor and extends over the length of the impeller, and a nozzle connected to the second side of the housing to supply the opening for

Abstract: A nano grinding and dispersing assembly has a raw material feeder, a liquid supply unit connecting to the delivering pipe of the raw material feeder, a gas supply unit connecting to the delivering pipe of the raw material feeder, a pressure equalized assembly and a subsequent treatment plant. The raw material feeder has a feeding pipe connecting to the raw material feeder and a delivering pipe connecting to the raw material feeder. The pressure equalized assembly has a pressure equalizer, a pressurized feeding pipe, a gas-liquid separator, a pressure gage and a first grinding device. The first grinding device connects and communicates with the pressure equalizer and has at least one ground fluid outlet. The subsequent treatment plant connects the ground fluid outlet of the first grinding device. Therefore, the present invention completely mixes, grinds and disperses fluid to make the fluid homogeneous.

Abstract: An abrasive blaster system includes a storage tank for storing dry granular abrasive media, a source of pressurized air and a metering valve for mixing the granular abrasive media with the pressurized air for release through a blast nozzle. A cooling system is in line with the source of pressurized air for cooling the air received from the source before it is introduced to the metering valve, whereby cooled air is introduced into the metering valve. The system also includes a dryer system downstream of the cooling system and adapted for selectively receiving a portion of the cooled air for further drying it. The dryer system is in communication with the storage tank, whereby cooled, dry air is introduced into the storage tank.

Abstract: This invention relates to a device for particle blasting, comprising a mixing device for mixing the particles and the carrier gas. The mixing device comprises, on the one hand, a mixing plate (3) wherein at least one supply channel (6) for the carrier gas, at least one supply channel for the particles (14) and at least one discharge channel (7) for the mixture are provided, and on the other hand, comprises a rotatable distribution disc (1) provided with cavities (2), which during rotation are positioned in such a way that they are first filled with particles and then form a temporary connection between the supply channel (6) and the discharge channel (7), with the result that the carrier gas and the particles are mixed. Since both the supply channel and the discharge channel are provided in one and the same element, the seal between mixing plate and rotor is easy to achieve.

Abstract: A micro-abrasive blasting device and method for perturbation control using a plurality of delivery conduits of various lengths and/or apertures. The user is able to individually open and close bypass conduit pinch valve(s) external to micro-abrasive blasting device to affect the perturbation intensity internal to the mixing chamber. By selectively opening and closing flow through delivery conduits it is possible to provide a more consistent perturbation rate and select the perturbation intensity internal to mixing chamber.

Abstract: A loader arrangement 7 of a shot-blasting machine includes a bucket loader 29 having a tip opening that can be opened and closed by means of a lid 35. The loader arrangement 7 also includes a swivel arm 32, which is vertically and pivotally attached to a frame 4 via a linkage 31, for vertically swiveling the bucket loader 29, and a chain block 34 for swiveling the arm 32. Once the bucket loader 29 has reached the upper position above a rotary drum 5 by means of the swivel arm 32, a guide means 30, which is attached to the arm 32, allows the bucket loader 29 to approach the drum 5 through its top opening by driving a hydraulic cylinder 33, while the tip of the bucket loader 29 is opposed to the bottom wall of the drum 5. Once the tip of the bucket loader 29 is close to the bottom wall or the inner peripheral wall of the drum 5, the lid 35 is opened to drop the work pieces in the bucket loader 29 into the drum 5.

Abstract: A profile cutting apparatus comprising: a cutting head supporting a nozzle through which a cutting medium passes, and at least two drives that drive the cutting head to tilt relative to a vertical axis while driving the cutting head to rotate about the vertical axis, wherein the tilt of the cutting head is achieved by the relative difference in motion between the two drives.

Abstract: A method of removing a coating, such as paint, varnish, biological growth or grime, from a surface, the method comprising selecting a suitable particulate solid having a particular, size of from 150-250 mm and a fluid carrier to form a spray mixture and spraying the mixture as a jet spray so as to impact and at least partially remove the coating. The hardness of the particulate solid is less than 8.0 on the Moh scale. The pressure applied to the spray mixture to generate the spray is from 3.sub.x 10.sup.5 to 1.5.sub.x 10.sup.6 Nm.sup.-2. An apparatus comprising a blasting pot (1) and a compressor (2) to generate the spray mixture and propel it from a nozzle (5) is also disclosed. Heating may be applied to the carrier, either prior to or when mixing with the particulate solid.

Abstract: The present invention is a micro-abrasive blasting device (55) with superior perturbation control via a plurality of delivery conduits (25) of various lengths and apertures. The user is able to individually open and close bypass conduit pinch valve (99) external to micro-abrasive blasting device (55) to affect the perturbation intensity internal to the mixing chamber (23). By selectively opening and closing flow through delivery conduits (25) it is possible to provide a more consistent perturbation rate and select the perturbation intensity internal to mixing chamber (23).

Abstract: A waterjet system selectively produces fluid jets for water jet cutting or abrasive jets for abrasive-waterjet-cutting. The abrasive materials in the abrasive jet are determined based on the properties of the workpiece. The waterjet system includes an abrasive delivery system that is capable of delivering either a single abrasive or a plurality of abrasives as an abrasive blend, to a cutting head assembly. The cutting head assembly entrains the abrasive into a fluid jet to form an abrasive jet.

Abstract: An apparatus for supplying a constant amount of abrasives that can accurately control the amount of the abrasives to be supplied to a blasting machine is provided. A horizontally rotating disc 20 is provided in an abrasive tank 10 so as to be embedded in the abrasives. An opening at one end 11a of an abrasive transport path 11 is formed so as to be close to or in contact with one surface of the disc 20, an opening at one end 12a of a supply channel 12 for transport air flow is formed so as to be close to or in contact with the other surface of the disc 20, and an abrasive retrieve section 5 is formed between the both openings. Furthermore, measuring holes 21 penetrating the disc 20 in the thickness direction are formed at regular intervals along a rotation orbit of the disc 20 passing through the retrieve section 5, and an introduction path 17 for compressed gas which is ejected to the abrasives disposed above the measuring holes 21 and outside the retrieve section 5 is provided.

Abstract: To provide an apparatus for supplying a constant quantity of abrasive that can accurately control abrasive quantity supplied to a blasting machine. A rotating disk 20 that rotates in the horizontal direction is provided inside an abrasive tank 10, with a gap 3 being capable to rotate the rotating disk 20, being formed at an end 11a of a mixed fluid flow path 11 arranged on one surface of the rotating disk 20, and at an end 12a of a gas flow path 12 arranged facing other surface of the rotating disk 20 via the rotating disk 20 at the end 11a of the mixed fluid flow path 11. Hole sections 21 are provided in the rotating disk 20 on a rotation locus passing through the gap 3, equally spaced and passing through in a thickness direction of the rotating disk 20, with stirrer blades 22 protruding from the upper surface of the rotating disk 20, and the rotating disk 20 being immersed in abrasive stored inside the abrasive tank 10, except for a part positioned in the gap 3.

Abstract: The invention relates to a device for comminuting dry ice granules, comprising a housing having a flow channel for dry ice granules which can be applied, by means of compressed gas, to a surface to be cleaned, and also comprising a first comminution member for comminuting the dry ice granules which are to be dispensed. In order to provide a device of this kind with which different degrees of comminution of dry ice granules can be achieved in a simple manner, it is proposed according to the invention that the device has at least one second comminution member which can be disposed in the housing in a position in which a total degree of comminution, which is greater than the individual degree of comminution which can be achieved solely by the first comminution member, can be achieved in combination with the first comminution member. A dry ice dispensing arrangement for dispensing a mixture of compressed gas and dry ice granules is also proposed, having a device of the above kind.

Abstract: Apparatus for dispensing abrasive particulate material into a stream of gas, the apparatus comprising: a. a pressurised hopper for receiving particulate abrasive material; and b. a pressurised conveyor coupled to the hopper comprising a housing having an inlet for receiving particulate material from the hopper, an outlet for delivery of particulate material from the housing, and a screw located within the housing for transporting particulate material from the inlet to the outlet. Also provided is a method of dispensing particulate abrasive using said apparatus and a pipe cleaning system including said apparatus.

Abstract: In one embodiment of the present invention, equipment for making holes by cutting in walls etc. is disclosed in case of fire in spaces in buildings etc. for fire fighting. The equipment includes a vehicle-mounted pressure source for pressurised extinguishing liquid, a lance carried by the operator with his hands and provided with an extinguishing nozzle, and a tubing between the pressure source and the extinguishing nozzle for supplying the extinguishing liquid. The extinguishing liquid flows as a jet out of the extinguishing nozzle and towards the wall etc. to cut the wall for making the hole and, when cutting through, be injected into the space on fire and extinguish the fire. The equipment also includes a vessel carried by the operator on his back and containing an additive, the vessel being connected to the extinguishing nozzle for regulated supply of the additive to the extinguishing liquid for improving the cutting and/or extinguishing effect.

Abstract: An abrasive supply system may, for example, be used to supply abrasive particles such as garnet to a cutting nozzle of an abrasive jet cutter. According to an embodiment, the abrasive is propelled by a substantially constant flow rate gas source. According to an embodiment, the system may be supplied with abrasive from an atmospheric pressure abrasive hopper. According to an embodiment, a controller automatically actuates refilling of an abrasive tank from the abrasive hopper, and then automatically closes an abrasive supply valve and restarts abrasive propulsion. According to an embodiment, the controller may include or consist of pneumatic logic.

Abstract: The present invention provides a blasting device, comprising: a container in which a blast medium is stored; a suction pipe which is inserted in the container to be rotatably supported, and is formed substantially in an L-shape with a lower suction port bent at a right angle; a rotary drive part which rotates the suction pipe; a hose connected to the suction pipe via a rotary joint; an ejector nozzle connected to the hose; an air compressor which supplies compressed air to the ejector nozzle; a pressure sensor which measures pressure in the suction pipe; and a control part which controls a rotational frequency of the suction pipe by the rotary drive mechanism based on a measured value by the pressure sensor.

Abstract: The invention provides a dosing device for a particulate material blasting apparatus comprising a dosing chamber having a base, a rotor carrying a plurality of circumferentially formed pockets ratably mountable with the chamber, a particulate product feed conduit adapted to feed particulate product onto a base of the dosing chamber adjacent a receiving side of the dosing chamber and a particulate product delivery conduit formed in the base of the dosing chamber adjacent a delivery side of the dosing chamber. The base of the dosing chamber is disposed with respect to the particulate product feed conduit such that particulate material will not spill over the base into the delivery conduit. The rotor is disposed with respect to the feed conduit such that particulate product fed onto the base of the dosing chamber will be picked up by the pockets formed in the rotor and lifted up and around the chamber from a receiving side of the dosing chamber to a delivery side of the dosing chamber.

Abstract: A media control valve includes a valve body having a media inlet and a media outlet with the valve body being adapted to be mounted on a flow device for providing communication between the media outlet and the flow device. A pressure balance flow line is provided in communication with the valve body and also with the flow device at a point upstream of the media outlet for balancing the pressure in the valve. A check valve may be included in the balance flow line for assuring that flow generally flows from the flow device to the valve body. A cleanout port may be provided for permitting clean out of the valve without disassembly when not in use.

Abstract: A particle blast apparatus has a pivoting hopper, allowing the hopper exit to move from or between a first position at which the exit is aligned with the feeder entrance to a second position where the hopper exit is not aligned as such. The hopper may emptied or cleared in this manner. The hopper may be provided with a device configured to impart energy to the hopper while the hopper exit is located at the second position.

Abstract: A slurry supply system with multiple supply modules and a flushing module concurrently coupled to the multiple supply modules is provided. Each supply module includes a slurry reservoir and at least one delivery line connecting to the slurry reservoir, wherein each delivery line is oriented toward a chemical mechanical polishing apparatus. The flushing module includes a flushing liquid reservoir and multiple flushing lines connecting to the flushing liquid reservoir, wherein each flushing line is coupled to each delivery line thereby the flush module can selectively flush one of the delivery lines.

Abstract: An apparatus for supplying a constant amount of abrasives that can accurately control the amount of the abrasives to be supplied to a blasting machine is provided. A horizontally rotating disc 20 is provided in an abrasive tank 10 so as to be embedded in the abrasives. An opening at one end 11a of an abrasive transport path 11 is formed so as to be close to or in contact with one surface of the disc 20, an opening at one end 12a of a supply channel 12 for transport air flow is formed so as to be close to or in contact with the other surface of the disc 20, and an abrasive retrieve section 5 is formed between the both openings. Furthermore, measuring holes 21 penetrating the disc 20 in the thickness direction are formed at regular intervals along a rotation orbit of the disc 20 passing through the retrieve section 5, and an introduction path 17 for compressed gas which is ejected to the abrasives disposed above the measuring holes 21 and outside the retrieve section 5 is provided.

Abstract: A method and apparatus for injecting solid particles such as dry ice into an airstream using an airlock having a spherical valve member with spaced through ports and rotatable between an annular seal on one side of the spherical member for feeding the particles to the fluid stream chamber with an annular seal on the opposite side for sealing a particle feed chamber. The airlock device is useful for sealing fluid stream pressure of about 133 Kg/m2 and temperatures of about 350° R.

Abstract: A particulate blasting apparatus includes a blast vessel having an interior for storing abrasive particulate. The blast vessel has an inlet for introducing a pressurized gas into the interior of the blast vessel and an outlet for allowing the passage of the pressurized gas and particulate. A flexible blast hose is coupled at one end to the outlet for directing particulate flow from the outlet and a blast nozzle is coupled to an opposite end of the blast hose. A metering valve regulates different amounts of particulate flow from the blast vessel through the outlet. A flow actuator is coupled to the metering valve for actuating the metering valve. A controller associated with the blast nozzle in communication with the actuator controls the actuator from the blast nozzle during blasting operations. The blasting apparatus may be used as part of a blasting system that includes a compressor unit for providing the pressurized gas.

Abstract: A method for generating a jet of dry ice particles, in which liquid carbon dioxide is expanded in an expansion space (12) in order to form dry ice particles which are then introduced into a flow of a carrier gas, and the discharge of the dry ice particles from the expansion space (16) is throttled by a constriction (20, 26; 28; 30; 32; 36; 38).

Abstract: A method and apparatus for down hole abrasive jet-fluid cutting, the apparatus includes a jet-fluid nozzle and a high pressure pump capable of delivering a high-pressure abrasive fluid mixture to the jet-fluid nozzle, an abrasive fluid mixing unit capable of maintaining and providing a coherent abrasive fluid mixture, a tube to deliver the high pressure coherent abrasive mixture down hole to the jet-fluid nozzle, a jetting shoe adapted to receive the jet-fluid nozzle and directing abrasive jet-fluid mixture towards a work piece, a jetting shoe controlling unit that manipulates the jetting shoe along a vertical and horizontal axis and a central processing unit having a memory unit capable of storing profile generation data for cutting a predefined shape or window profile in the work piece and coordinating the operation of various subsystems.

Abstract: A rotating disk 20 that rotates in the horizontal direction is provided inside an abrasive tank 10, with a gap 3 being capable to rotate the rotating disk 20, being formed at one end 11a of a mixed fluid flow path 11 arranged on one surface of the rotating disk 20, and at one end 12a of a gas flow path 12 arranged facing other surface of the rotating disk 20 via the rotating disk 20 at one end of the mixed fluid flow path 11. Hole sections 21 are provided in the rotating disk 20 on a rotation locus passing through the gap 3, equally spaced and passing through in a thickness direction of the rotating disk 20, with stirrer blades 22 protruding from the upper surface of the rotating disk 20, and the rotating disk 20 being immersed in abrasive stored inside the abrasive tank 10, except for a part positioned in the gap 3.

Abstract: A powder blast tool for mixing a powder with a pressurised gas, having at least one powder reservoir, with supply lines for the pressurised gas, and a discharge line, which is connected to a discharge nozzle, at which a powder-gas mixture and optionally pressurised water are discharged, wherein the powder blast tool can preferably be connected to plural powder reservoirs simultaneously and exchangeably, wherein at least one receiving region with at least one mixture terminal and at least one gas terminal is disposed on the powder blast tool and wherein the powder reservoir has a coupling region for exchangeable connection of the powder reservoir to the powder blast tool. Also disclosed are a suitable powder reservoir and an insert for such powder reservoirs and a corresponding method of dental treatment.

Abstract: Blast-cleaning systems are disclosed, which enable a single system to handle different classes of particulate blasting media, such as grit, powder, and dry ice, and to deliver controllable mixtures of different media types during a blasting operation. This “multi-media” system includes a hopper having two chambers or other supply assemblies that are isolated from each other, for holding two different types of blasting media. Both chambers provide their particulates to a metering control device, which supplies a compressor. For example, by combining grit with dry ice, extremely efficient cleaning can be accomplished, with greatly reduced production of solid waste. Tests have shown that combinations of dry ice (at roughly 90%) with a grit or powder can provide far greater cleaning efficiency than either media type by itself.

Abstract: The present invention is related to valves for the controlling the flow of media. For example, the valves of the present invention may control the flow of solid media into a fluid stream. More, specifically, the valves of the present invention may be used to control the flow of a blasting media into an air stream as part of a blasting apparatus for treatment of a surface. The valve body houses a sleeve for accepting a plunger for opening and closing a media opening in the valve. The sleeve includes a hardened liner and a softer outer jacket. The plunger engaging portion of the jacket is of a larger diameter than the plunger engaging portion of the liner to create a gap between the plunger and the soft jacket portion of the sleeve.

Abstract: The flow of media in shot peening, blast cleaning, and similar equipment is improved by applying a time varying magnetic field to the media to thereby degauss the media, allowing the media to flow through equipment without clogging and clumping due to magnetic attraction between the media.