Abstract: A disposable apparatus for propelling particulate matter against a surface of a target material that includes: a mixing chamber having a chamber wall, a multi-conduit receiving port, a propellant-gas receiving conduit, and a discharge conduit. The gas delivery conduit extends from the propellant-gas receiving port into the chamber, a mixture discharge conduit extending from the mixture discharge port into the chamber, and a quantity of particulate matter inside the chamber. The disposable apparatus further includes a membrane capable of allowing a gas stream to pass through when the gas stream is flowing and seals the mixing chamber when the gas stream is not flowing. The membrane can be of a hemispherical shaped, molded piece that includes at least one slit to provide an opening when the gas stream is flowing.

Abstract: A device for abrasive-blasting of workpieces including a chamber (which is to be evacuated during operation) having a first opening, a nozzle pipe unit with a nozzle pipe which can be inserted through the first opening into the chamber, and a container for the accommodation of blasting material, in which case the container for the accommodation of blasting material is mounted, or can be mounted, to the nozzle pipe unit in such a manner that the blasting material can flow freely out of the container into an inlet of the nozzle pipe unit.

Abstract: A hand held abrasive blaster includes a tubular wand housing and an abrasives conduit which extends into the wand housing. The abrasives conduit includes a fixed portion at the rearward end and a rotatable portion at the forward end. A motor rotates the rotatable portion. A pair of spaced apart handles on the exterior surface of the wand housing. The handles are positioned along the exterior of the wand housing at a center of gravity for the wand housing.

Abstract: A grinding method is provided which can grind a processing surface of a workpiece by a blast processing without use of specific abrasives to obtain a glossy surface such as a mirror surface. Abrasives together with compresses fluid are injected to the processing surface of the workpiece with an incident angle ? to meet the condition shown in the following equation: 0<V·sin ??½·VEquation 1; V=speed of the abrasive in an injection direction ?=incident angle of the abrasive to the processing surface of the workpiece.

Abstract: A sand blasting machine consists of a working chest and an air compressor that are coupled together. The working chest includes a casing, a upper lid, a nozzle holding dock, a nozzle, an air discharge filter device, an actuation switch, a left glove operation means and a right glove operation means. The air compressor includes an air compressor body, a return tube and a foot frog. By means of these elements, the air compressor and the working chest are coupled together in an integrated manner. Hence carrying and transportation are easier. Sand blasting operation can be performed flexibly without site constraint.

Abstract: A multistage abrasive-liquid jet cutting head comprising at least a first and a second mixing stage. Within the first mixing stage is a first mixing chamber arranged to accept a first flow of accelerated abrasive particles from a first abrasive feed tube and a pressurized liquid flow from an orifice and produce a pressurized slurry-like flow that is introduced to the second mixing stage. Within the second mixing stage is a second mixing chamber arranged to accept and mix is second flow of accelerated abrasive particles from a second abrasive feed tube with the pressurized slurry-like flow from the first mixing stage. An exit nozzle in fluid communication with the second mixing chamber that focuses the combination of the second flow of accelerated abrasive particles from the second abrasive feed tube with the pressurized slurry-like flow from the first mixing stage into an abrasive jet.

Abstract: The present invention includes an apparatus for delivery of pressurized particulate matter against a surface or target to abrade, texture, sandblast, etch, erase, cut, penetrate, smooth, clean, polish, harden and/or deburr the surface or target. The invention is expected to be used in slightly different embodiments, both by dentists and oral hygienists to clean teeth, and by hobbyists, although numerous other uses are within the contemplation of the inventors. The dental embodiment features a prefilled, sealed, and disposable fluidizing chamber and cannula assembly that avoids contamination and which has been approved by the FDA for dental use. The general utility embodiment features a refillable fluidizing chamber and detachable cannula.

Abstract: The present invention relates to a micro-abrasion device comprising: a first reservoir intended to contain a powder to be sprayed onto a surface that is to be treated, a second reservoir intended to collect the used powder, a handpiece designed to be applied against the surface that is to be treated. This device comprises a removable cartridge (5) that can be fitted onto the device and removed independently of the handpiece and comprising the first and the second reservoirs.

Abstract: The invention is an apparatus used for cleaning equipment including extremely high voltage energized electrical equipment using a dry ice blasting stream as the cleaning agent. The apparatus comprises a cleaning wand and a heating mechanism for impeding the formation of condensation and/or frost on the outer surface of the wand, thereby enabling the wand to operate for prolonged periods of time.

Abstract: A water jet-processing machine comprising a workpiece holding table for holding a workpiece, a nozzle for applying processing water to the workpiece held on the workpiece holding table, and a processing water supply means for supplying processing water containing abrasive grains to the nozzles, wherein the water jet-processing machine comprises a plurality of the nozzles and an interval adjusting means for adjusting an interval between adjacent nozzles.

Abstract: A disposable apparatus for propelling particulate matter against a surface of a target material that includes: a mixing chamber having a chamber wall, a multi-conduit receiving port, a propellant-gas receiving conduit, and a discharge conduit. The gas delivery conduit extends from the propellant-gas receiving port into the chamber, a mixture discharge conduit extending from the mixture discharge port into the chamber, and a quantity of particulate matter inside the chamber. The disposable apparatus further includes a membrane capable of allowing a gas stream to pass through when the gas stream is flowing and seals the mixing chamber when the gas stream is not flowing. The membrane can be of a hemispherical shaped, molded piece that includes at least one slit to provide an opening when the gas stream is flowing.

Abstract: An apparatus for cleaning using blast cleaning media including a cabinet, an evacuation device in communication with the cabinet, and a delivery unit containing cleaning media in communication with the cabinet. The delivery unit includes a safety device for relieving pressure within the delivery unit prior to refilling. The cabinet includes ports in communication with a diverter channel for increasing visibility along a line of sight upon activation of the evacuation device.

Abstract: A system is provided for delivering onto a workpiece a high-energy abrasive cutting stream. The system generally comprises a head assembly for providing a pressurized fluidic stream; a nozzling unit coupled to the head assembly for nozzling the pressurized fluidic stream; and, an adaptive orientation assembly coupled to the nozzling unit. The nozzling unit is operable to expel a high-energy abrasive cutting stream for cutting about or along a predefined pattern on the workpiece, and includes a nozzle member having a laminar inner wall surface defining a longitudinally extending passage. This passage terminates at an outlet portion which describes in sectional contour a predetermined shape such that, during operation, it serves to generate upon the workpiece an instantaneous kerf of cut having a corresponding sectional contour.

Abstract: A dental prophylaxis and air appliance for in-home use having a pressurized air source, a pneumatic or mechanical switching device to turn on and off the air source, a hand piece, and a pressurized reservoir for a mixture of dry or wetted abrasive and non-abrasive components. The compressed air is delivered to the hand piece by a line that meters out and discharges the post-mixed water slurry of abrasive or non-abrasive components.

Abstract: A particulate blaster assembly (100) for use as an attachment to a portable air blower (150) includes an air directing tube (110), a vacuum generating assembly (120), and a particulate material aspirator (130). The air directing tube (110) has an inlet end (112) formed for coupling to the air blower (150) to receive air discharged therefrom and a movable exhaust end (114) formed for discharge of air and particulate material (212) entrained in the air toward a target site (160). The vacuum assembly (120) is coupled to the air directing tube (110) and formed to produce a partial vacuum as air passes in the tube (110) over the vacuum generating assembly (120).

Abstract: The invention relates to abrasive water jet systems including an abrasive water jet mixing tube having a longitudinal bore lined with a superhard material, including such systems which use cubic boron carbide (CBN), diamond, or other materials with a hardness greater than that of alumina as the abrasive material. The invention also includes methods of using an AWJ system having a mixing tube having a longitudinal bore lined with a superhard material. Some embodiments include AWJ mixing tubes which include a plurality of connected components. Such connections may be disconnectable.

Abstract: A powder, such as an abrasive powder, is delivered from a pressure vessel having an outlet in the floor communicating with a flow of pressurized gas. A container of the particulate material is located within the pressure vessel and has an outlet to dispense small portions of the particulate material. The material in the container is at substantially the same pressure as that in the pressure vessel itself.

Abstract: A system is provided for delivering onto a workpiece a high-energy abrasive cutting stream. The system generally comprises a head assembly for providing a pressurized fluidic stream; a nozzling unit coupled to the head assembly for nozzling the pressurized fluidic stream; and, an adaptive orientation assembly coupled to the nozzling unit. The nozzling unit is operable to expel a high-energy abrasive cutting stream for cutting about or along a predefined pattern on the workpiece, and includes a nozzle member having a laminar inner wall surface defining a longitudinally extending passage. This passage terminates at an outlet portion which describes in sectional contour a predetermined shape such that, during operation, it serves to generate upon the workpiece an instantaneous kerf of cut having a corresponding sectional contour.

Abstract: The present invention provides a portable dental system for use in areas having inadequate sources of power, either for human or for veterinary dentistry. The system provides one or more handpieces, each driven driven by a pressurized nitrogen gas contained in a portable tank. A water reservoir is also provided for medicated water to be applied to the tooth site. The system has two channels to which either a conventional dental handpiece or an abrasive handpiece can be attached. When two abrasive handpieces are attached, two different abrasive materials may be used by the system, one material for cleaning and one material for cutting or abrading.

Abstract: A portable, self-contained sand blaster including a cabinet and accessory end caps. The caps include a solid end wall, an extension box for treating larger parts in the cabinet, a softboot with drawstring closure affixed about parts to be treated, and a softboot with a magnetic opening for attachment to rusted, relatively flat surfaces. The base is wheeled and has controls, a vacuum for dust, a sand supply, and a blast cabinet on top; the base includes connectors for hookup to electric power and a source of compressed air. A media filter screens out rust particles form the media.

Abstract: The invention relates to a method and device for sandblasting, especially removing in a precise manner and/or compacting and/or coating solid surfaces, such as removing defective spots of paint from coats of lacquer, smoothing out soldered and welded joints, removal of contaminated concrete coatings or rust coatings, hardening, planing or coating metal surfaces, wherein a sandblasting agent is added by means of gravity and/or due to the effect of an injector to a carrier air flow produced by an underpessure, conveyed in a flexible hose-line system (13) to a jet lance (14) before being guided via a processing surface subject to low pressure by a sandblasting chamber, whereupon it is returned to the air flow, purified and returned to the circuit, whereby acceleration of the sandblasting agent is produced by the low pressure and the sandblasting chamber is displaced from one processing surface to another.

Abstract: A dry ice blasting system adapted for low gas flow rates at low pressures with small dry ice particles to produce a very small footprint on a surface being cleaned.

Abstract: Apparatus and method to establish permissible ranges of the gas/dry ice ratio in a dry ice blasting stream. Logic and circuitry determine whether a proposed ratio is permissible. If it is, it enables the process to start. If it is not, it forbids operation of the process.

Abstract: A microdermabrasion handpiece includes a supply lumen and a return lumen in fluid communication with an abrasion chamber. A window formed at a distal end of the handpiece is off-centered from the supply lumen. The supply lumen directs a flow of abrasive particulate in a first direction. A supply nozzle adjacent to the distal end of the handpiece directs the flow of abrasive particulate at the window in a second direction different from the first direction. Methods for performing microdermabrasion are also provided.

Abstract: The application relates to a process for working a workpiece, in which process an abrasive liquid is sprayed onto the workpiece, via a nozzle, at relatively low pressures which are sufficient to shape and/or polish the surface of the workpiece. The workpiece can be both shaped and polished in a single working step. Abrasive particles or polishing particles may be contained in the abrasive liquid. The pressure of the abrasive liquid lies below 50 bar, preferably below 20 bar. By arranging two nozzles in such a manner that the liquid jets intersect one another at a point, it is possible to set an accurate working depth.

Abstract: Apparatus and method for removing a latex coating concealing and overlying indicia on a sheet includes an elongated finger and thumb-gripping handle and a forward elbow having a lower end laterally offset from the handle axis. A cavity is provided carrying a compressible resilient member, the outer surface of which extends downwardly below the edge of the lower end of the elbow. The outer surface of the member carries dispersed aluminum oxide grit dispersed in random webs forming a disc to abrasively remove the latex coating with a fine dust residue remaining and larger particles of latex gathered and retained on the outer surface. A ring element is integral with the handle remote from the elbow. The method includes pressing the disc onto a latex coating and moving the handle generally horizontally back and forth to cause the coating to become a fine latex powder and causing residue particles of latex to adhere to the grit.

Abstract: An abrasive, fluid jet cutting apparatus, and its method of construction and operation, are disclosed that reduce the wear and erosion problems typically experienced in the cutting jet's mixing tube.

Abstract: A dental tool for the delivery of pressurized air containing abrasive media includes a supply of unpressurized water which joins the leading end of the tool at a location at which the water is drawn to form a curtain about the pressurized air/media flow.

Abstract: A micro-dermabrasion system and method in which a handpiece includes an axially aligned treatment orifice and laterally offset particle supply and waste removal channels. At least a portion of the particle supply channel is angularly offset relative to the waste removal channel so the particle stream impinges substantially on the center of the treatment orifice. The handpiece employs tapered couplers to permit easy attachment and detachment of particle supply and waste removal lines in a handpiece having a small diameter. The particle supply container is designed to be pre-filled by a supplier, and disposed of when empty without disassembly. The supply container is also constructed to permit controlled aeration of the particles before delivery to the handpiece to reduce clogging of the particle lines and to facilitate continuous adjustment of particle flow rate.

Abstract: A portable, self-contained sand blaster including a cabinet and accessory end caps. The caps include a solid end wall, an extension box for treating larger parts in the cabinet, a softboot with drawstring closure affixed about parts to be treated, and a softboot with a magnetic opening for attachment to rusted, relatively flat surfaces. The base is wheeled and has controls, a vacuum for dust, a sand supply, and a blast cabinet on top; the base includes connectors for hookup to electric power and a source of compressed air. A media filter screens out rust particles form the media.

Abstract: A nozzle includes a tube and a flared deflector extending coaxially from an outlet thereof. A stream of abrasive pliant shot is discharged through the nozzle and deflected radially outwardly from the deflector for abrading a shifting edge along an aperture in a workpiece surface.

Abstract: A hand-held blasting gun for use in dry ice blasting for cleaning purposes. A handle and a nozzle mount are pivotally joined so a nozzle on the nozzle mount can be adjustably directed relative to the handle. A flexible hose is fitted in the gun, extending from the end of the handle to the nozzle so as to send without kinking.

Abstract: A hand-holdable apparatus useful for abrading a surface is provided. The invention is particularly useful for dental applications using a stream of abrasive particles suspended in a gas stream to abrade the surface of a tooth. The apparatus of the invention may be modified to easily minimize “bleed down” of the gas/abrasive stream using a pinch valve and to remove worn flexible conduits for routine maintenance and autoclaving of the apparatus. The apparatus of the invention also provides a novel pick-up assembly for delivery of abrasive particles.

Abstract: A cap device for preventing an airflow streaming from an inlet bore of an abrasion contact tool to a plurality of outlet bores disposed thereabout. The cap device comprises a cap engageable to the abrasion contact tool having an inner surface. A bar formed or attached to the inner surface is provided that is positionable over the inlet bore to prevent the airflow streaming therefrom when the cap is engaged to the abrasion contact tool so as to allow the outlet bores to selectively exert a vacuum airflow exiting therethrough.

Abstract: The present invention is a superior micro abrasive blasting device (55) with an integral flow control mechanism. Flow control is achieved through the displacement of discharge conduit (10) to control the distance between discharge conduit inlet (12) and mixing chamber second end wall (30). The flow control mechanism provides for the continuous pressurization of the mixing chamber (23) to yield instantaneous flow start-up response and instantaneous flow shut-off response. A method is provided for maintaining discharge conduit outlet (67) stationary with respect to target material (40) while discharge conduit inlet (12) is displaced. The method utilizes the deflection properties of discharge conduit (10) to provide the necessary compliance so the discharge conduit inlet (12) can be displaced while the discharge conduit outlet (12) remains stationary.

Abstract: The device consists of an outer body (1) with a cylindrical bore (2) housing the mixing chamber (5), a sleeve (7) fitted to the outer body (1) and housing in a bore (8) a second body of revolution (9). The outer body (1) is provided with a first inlet (13) for the supply of liquid to the mixing chamber, and with a second inlet (11) with is oblique and offset from the axis of the mixing chamber (5) for of the mixture of air and fine particulate. The second inlet (11) is situated in such a way that a mixture of air and fine particulate reaches the inner wall of the chamber (5) near its upstream end.

Abstract: The present invention provides a sandblasting gun, in which by assembling an adapter, a blast head assembly in securing connection sequentially on a tool gun front end; said blast head assembly holds a blast nozzle in the inside of a tap hole at the back end of the main body, thereby a jet exhaust of the blast nozzle jetting high compressed air to generate a sucking force in the pipeline; at the front end of the main body, an extended male thread is provided for securing an end nut to hold a blast tube, a extended scavenging gun-barrel or a spray adapter in to combine a sandblasting gun, a spraying gun or a cleaning gun for meet multipurpose in operation.

Abstract: An constant abrasive feeder of abrasive grains M is formed of a reservoir supply section 20 having a reservoir tank 21 and a buffer tank 31, a stirring hopper 40 for stirring abrasive grains S, and a vibration feeder 60 for supplying the abrasive grains S to an abrasive jet nozzle 5. The abrasive grains S recovered in a cyclone 1 is reserved in the reservoir tank 21 and the buffer tank 31 by a constant quantity, the abrasive grains S is sent from the buffer tank 31 and reserved in a reservoir 43, which is stirred by stirring bars 50, 51 and sent to a supply guide 45. Then, the abrasive grains S is sequentially supplied to a feeder body 61 of the vibration feeder 60 from an opening formed in the supply guide 45.

Abstract: A blasting cabinet for use in cleaning a work piece with abrasive intrained in an air stream under pressure. An enclosure having multiple access openings and configured interior surfaces that direct spent abrasive forward to a collection area in spaced relation to the supported work piece on a solid work surface within said cabinet.

Abstract: The present invention includes an apparatus for delivery of pressurized particulate matter against a surface or target to abrade, texture, sandblast, etch, erase, cut, penetrate, smooth, clean, polish, harden and/or deburr the surface or target. The invention is expected to be used largely by hobbyists, although numerous other uses are within the contemplation of the inventors. Included is a fluidizing chamber having a discharge end of an inlet tube that is disposed below or overlaps the intake end of the cannula such that the discharge of the inlet tube blows the particulate matter into the fluid above the intake end of the cannula, thereby suspending it therein, without clogging. The invention further provides for dual check valve function in several different embodiments to prevent backflow of particulate matter in the event of a drop in pneumatic pressure, and also to prevent excessive pressure from reaching the fluidizing chamber and cannula in the event of a pressure surge.

Abstract: The present invention is a superior micro abrasive blasting device (55) with an integral sealed reservoir (22) that converts into a mixing chamber (23). When not in use, the micro abrasive blasting device (55) forms a sealed reservoir (22) that protects the stored particulate matter (20) from contamination and spillage. When the device is setup for use, the sealed reservoir (22) transforms into an operational mixing chamber (23). A method is provided for easily unsealing reservoir (22) and turning it into the mixing chamber (23) in a single motion. In the preferred embodiment, a compliant closure cap (30) is displaced along the container side wall (15) in the direction of the container end wall (17) . The displacement causes the gas-delivery conduit (25) disposed within the reservoir (22) to protrude through the compliant closure cap (30) and to form a gas-receiving port (35).

Abstract: A dental abrasive blasting or jet apparatus is provided with an interconnected handpiece having a nozzle arrangement which is supplied with a dental powder as stored in a powder reservoir and delivered under pressure by a gaseous carrier medium via a powder supply line together with a fluid that is supplied via a separate fluid supply line. The apparatus is provided with a separate fluid receptacle or bottle which is filled with a flushing or rinsing liquid for being selectively supplied to the nozzle arrangement of the handpiece via a branch line having a change-over directional valve downstream of a suction pump for supplying the flushing or rinsing liquid to the portion of the fluid supply line that is directly connected with the handpiece.

Abstract: A disposable apparatus for propelling particulate matter against a surface of a target material that includes: a mixing chamber having a chamber wall, a multi-conduit receiving port, a propellant-gas receiving conduit, and a discharge conduit. The gas delivery conduit extends from the propellant-gas receiving port into the chamber, a mixture discharge conduit extending from the mixture discharge port into the chamber, and a quantity of particulate matter inside the chamber. The disposable apparatus further includes a membrane capable of allowing a gas stream to pass through when the gas stream is flowing and seals the mixing chamber when the gas stream is not flowing. The membrane can be of a hemispherical shaped, molded piece that includes at least one slit to provide an opening when the gas stream is flowing.

Abstract: A system for abrasively cleaning small parts, and a container for holding small parts undergoing abrasive cleaning. An abrasive cleaning cabinet has a bottom member and a cover hingedly connected to the bottom member. The cover is pivotable between a closed position in which the cover is closed against the bottom member to define a cleaning chamber therewithin and an open position permitting access into the cleaning chamber. The cover has a viewing window and a pair of arm apertures through it, with a glove attached to each arm aperture and extending into the cleaning chamber to permit insertion of a person's hands through the arm apertures and into the gloves in the cleaning chamber.

Abstract: A disposable apparatus for propelling particulate matter against a surface of a target material includes, a mixing chamber having a chamber wall, a multi-conduit receiving port, a propellant-gas receiving conduit, a discharge conduit, and a flow through conduit. The gas delivery conduit extends from the propellant-gas receiving port into the chamber, a mixture discharge conduit extending from the mixture discharge port into the chamber, and a quantity of particulate matter inside the chamber. The flow through conduit(s) provide a means for transferring flow from the multi-conduit receiving port through the discharge wall to exit proximate the exit of the discharge port.

Abstract: A blast nozzle apparatus which includes a circular inlet to an entry portion with converging top and bottom surfaces and diverging side surfaces which terminate in a throat portion and an outlet portion including diverging side surfaces and top and bottom surfaces terminating in a substantially rectangular outlet opening.

Abstract: A self-contained device is disclosed for directing a fluid stream containing particulate matter against a surface to abrade, etch, erase, cut, smooth, clean, polish and harden the surface. In tile preferred embodiments of the invention, the particulate matter is contained within the device and a carrier fluid, under pressure, introduced therein and mixes with the particles to produce a fluid stream that can be delivered to a target surface. The device can be powered and/or energized by a source of compressed gas which is coupled to the device through a fixture designed for that purpose. The invention also includes a method for delivery of a particle stream, under pressure, to a target surface, and, to tile selective modification of tile target surface depending upon the hardness of the particle, the velocity of impact thereof and the extent of the exposure of the target surface to tile particle stream.

Abstract: A workpiece surface is treated in a cleaning, polishing or milling or similar surface treatment operation by a waterjet head. The head is located near the workpiece surface with its axis intersecting the workpiece surface and is held so that it dies not rotate about its axis. The waterjet head is driven so that its axis rapidly and repetitively moves in a closed path. The waterjet head is mounted in an eccentric member and the closed path is a surface of revolution. In one arrangement, the closed path described by the axis of the waterjet head is a circular cylinder. In another arrangement, the waterjet head is pivotally mounted and resiliently supported so that the closed path is conical.

Abstract: A method and apparatus for producing a high-velocity particle stream at low cost through multi-staged acceleration using different media in each stage, the particles are accelerated to a subsonic velocity (with respect to the velocity of sound in air) using one or more jets of gas at low cost, then further accelerated to a higher velocity using jets of water. Additionally, to enhance particle acceleration, a vortex motion is created, and the particles introduced into the fluid having vortex motion, thereby enhancing the delivery of particles to the target.

Abstract: A hand-holdable apparatus useful for abrading a surface is provided. The invention is particularly useful for dental applications using a stream of abrasive particles suspended in a gas stream to abrade the surface of a tooth. The apparatus of the invention may be modified to easily minimize “bleed down” of the gas/abrasive stream using a pinch valve and to remove worn flexible conduits for routine maintenance and autoclaving of the apparatus. The apparatus of the invention also provides a novel pick-up assembly for delivery of abrasive particles.