An apparatus is described which introduces cryogenic particles received from a source of particles, having a first pressure, into a moving transport fluid, having a second pressure, for ultimate delivery to a workpiece or target as particles entrained in a transport fluid flow which seals between the source of particles and the transport fluid flow.

The invention relates to apparatuses for cleaning surfaces from contamination. The apparatus comprises a body, a shaft with a rotation axis, wherein such shaft is mounted to allow rotation in the body. The apparatus comprises a stationary cutter die secured to the body, and a flat throughput die secured to the body and placed below the stationary cutter die in a plane parallel to the plane of the stationary cutter die. The apparatus also comprises a rotating cutter die between the mounting plane of the upper stationary cutter die and the mounting plane of the flat throughput die, and is made to allow cutting the pellets of solid cryogenic substance in the plane of contact between the stationary cutter die and the rotating cutter die and/or in the plane of contact between the flat throughput die and the rotating cutter die. The invention allows improved performance of the dry ice blasting process.

An abrading device includes a funnel and an outlet orifice disposed within the funnel for passage of abrasive material, where a distance between the outlet orifice and a bottom end of the funnel is adjustable. An exhaust tube is coupled to the funnel for withdrawal of spent abrasive material from the funnel.

A method for treating a surface of a fibre composite component, wherein an abrasive removal of the surface of the fibre composite component takes place by blasting a removing agent transported by a gaseous transporting fluid onto the surface of the fibre composite component by a feed nozzle and a suction extraction of the removing agent and material removed by the removing agent takes place by an extraction nozzle arranged in the region of the feed nozzle.

The present invention relates to a device for producing high-strength CO.sub.2 pellets from CO.sub.2 snow, in particular, for a cleaning device for blasting surfaces to be treated with a mixed-flow consisting of a compressed gas and CO.sub.2 pellets, including a main compressing device for compressing CO.sub.2 snow for forming CO.sub.2 pellets, further including a pre-compressing device for pre-compressing CO.sub.2 snow produced by expanding liquid CO.sub.2, wherein the pre-compressing device is in the form of a fluid-mechanical pre-compressing device, wherein the pre-compressing device includes an expansion device for producing CO.sub.2 snow from liquid or gaseous CO.sub.2 and a pre-compression chamber for receiving and pre-compressing the produced CO.sub.2 snow and wherein the expansion device and the pre-compression chamber are connected to one another in fluidic manner.

A micro-abrasion sandblast device having a tank for containing a supply of abrasive media and having a media outlet on a base thereof and a cabinet attached to the tank and providing a first inlet to which an external source of compressed air is connectable and a second inlet to which an external source of water is connectable. A media valve is located adjacent the base of the tank for receiving media from the media outlet and compressed air from the cabinet. A blast hose coupler connects to and extends from the media valve for receiving the media and compressed air from the media valve.

A powder chamber, in particular for powder polishing devices, including a casing and two functional sectors, whereby the two functional sectors are arranged to be opposite to each other, and whereby at least one functional sector is designed to provide an opening for a working medium such as air or a mixture of powder and air, and whereby the two functional sectors are designed to allow the powder chamber to be locked. The two functional sectors are preferably arranged along an axis and are rotationally symmetric.

A device, system, and method is disclosed for cleaning the interior of the tubes in air-cooled heat exchangers. The tubes are cleaned using dry finely divided abrasive entrained in high pressure air blasted through the tube to remove any accumulation in the tube or on the tube walls resulting in a bright metal condition suitable for inspection by the Internal Rotary Inspection System, or application of a corrosion-resistant coating, or a lesser level of cleanliness appropriate for return to service. The device is electromagnetically attached to the outside of a ferromagnetic tube header, or to a ferromagnetic plate secured to the outside of a non-ferromagnetic plug-type header or a plate-type header of any material, to temporarily secure a grit-resistant nozzle assembly and position the nozzle for proper application of the high pressure air and entrained abrasive to facilitate cleaning, avoid tube damage, and provide for operator safety. The disclosure still further relates to a system and a method, both employing the device, to clean the interior of the tubes with dry abrasive blasting using high pressure air, and at the other end of the tube, capturing the air, spent abrasive, and material removed from the tube, separating the spent abrasive and removed material from the waste air, filtering the waste air, and exhausting the now filtered air to the environment; all without fugitive emissions.

A powder chamber, especially for or of a dental powder jet apparatus, including at least one conductive region, which is electrically conductive, where the at least one conductive region includes a contact surface, which is formed within the powder chamber.

Cleaning systems for food-related equipment and surfaces, such as, but not limited to, a steel belt baking surface, has a translatable and pivotable arm to position a discharge manifold over a surface to be cleaned. The arm has supply and return lines for a salt composition that includes one or more of sodium carbonate, sodium bicarbonate and calcium phosphate and does not include a liquid component. The salt impinges the surface and kinetically and chemically cleans it. Discharged salt is collected by drawing the salt through the return line and to a filter unit. The translatable and pivotable arm can be composed of telescoping sections forming a telescoping conduit for the return line or can be composed of non-telescoping sections that form the return line. The cleaning system operates in an open loop mode.