A control system for controlling abrasive blasting apparatus and an abrasive blasting apparatus including such a control system. The control system controls delivery of air and blast media to a blast nozzle of the abrasive blasting apparatus. The control system includes a deadman's switch, the deadman's switch features a user operable control. The user operable control is moveable from a first position, where the control system causes the abrasive blasting apparatus to not deliver air or blast media, to a second position where the control system causes the abrasive blasting apparatus to deliver both air and blast media. When the user operable control is in an intermediate position between the first and second positions, the control system causes the abrasive blasting apparatus to deliver air but not blast media. The control system may have control elements whose state may be sequentially changed by the user operable control as it moves.

A cleaning system that utilizes a dispensing head to spray carbon dioxide and a propellant against a surface. The carbon dioxide being propelled includes solid phase crystals. A supply line is used to feed the carbon dioxide to a dispensing head. Within the dispensing head, a first manifold chamber receives the carbon dioxide. A plurality of pathways link the first manifold chamber to a plurality of output nozzles. Each of the pathways contains an internal configuration that induces a formation of solid phase carbon dioxide crystals as the carbon dioxide from the supply line flows through the pathways toward the output nozzles. The propellant enters the dispensing head and flows into a second manifold chamber. The second manifold chamber has an exit opening near, or at, the output nozzles. As carbon dioxide, in both gas and solid phase, exits the output nozzles, it is accelerated by the propellant.

Nozzle system for a powder blasting device including a first nozzle element for transporting a powder-gas mixture stream along a transporting direction and a second nozzle element, where the second nozzle element surrounds the first nozzle element such that at least one channel is formed between the first nozzle element and the second nozzle element, where the channel is provided for transporting a liquid stream, where the first nozzle element and the second nozzle element are arranged such that in operation the powder-gas-mixture stream ejected by the first nozzle element is encased by the liquid stream ejected by the channel for forming an output stream of the nozzle system, where the first nozzle element has an acceleration part having a first cross section and a spreading part having a second cross section, where the spreading part is arranged downstream of the acceleration part.

A device and system are disclosed to clean the interior of tubes in air-cooled heat exchangers. The device is attached at each end of a tube by electromagnetism; either directly to a ferromagnetic tube header, or to a ferromagnetic plate secured to a non-ferromagnetic plug-type header or to a plate-type header of any metal. High pressure air with entrained dry finely-divided abrasive is conducted through a nozzle supported by the device. At the other end of the tube, another device supports a nozzle that captures the air, spent abrasive, and removed material. Spent abrasive and removed material are separated by filtration from the air before the air is exhausted to the environment. Tubes are cleaned to a bright metal condition, suitable for inspection or application of a corrosion-resistant coating, or to a lesser level of cleanliness appropriate for return to service.

A powder for cleaning an internal body part and/or an implant, in particular by means of a powder jet device, wherein the powder is sterile as a result of a sterilizing process.

A re-circulatory blasting device obtained is capable of performing stable treatment for a prolonged period of time even in cases in which an elastic abrasive employed has abrasive grains adhered to the surface of elastic cores. An elastic abrasive regeneration device provided to the blasting device regenerates elastic abrasive employed for re-circulation. The elastic abrasive regeneration device includes a mixer and a combining unit. Recovered abrasive fed in from an abrasive recovery section is mixed in the mixer with abrasive grains fed in from an abrasive grain feeder, and the abrasive grains are adhered to the surface of the cores of the recovered abrasive. In the combining unit, the abrasive grains are pressed against and combined to the surface of the cores by passing an aggregated state of the recovered abrasive mixed by the mixer along a constricted flow path having a flow path cross-sectional area that gradually narrows.

A method and apparatus produce an enhanced blast stream which may be directed at a workpiece. The enhanced blast stream has higher energy allowing the blast stream to remove difficult to remove coatings from substrates. A heated flow is combined with an entrained particle flow and expelled through a nozzle. The heated flow results in more energy being imparted to the coating.

An engine valve cleaning system is disclosed. The system includes a first tube configured to deliver pressurized air, a second tube configured couple to an abrasive media source and draw an abrasive media therefrom, and a spray applicator. The spray applicator includes a first passageway coupled to the first tube and configured to deliver pressurized air, and a second passageway coupled to the second tube and configured to deliver the abrasive media. The first passageway intersects the second passageway such that a passing of the pressurized air past the second passageway draws the abrasive media from the abrasive media source without the necessary for an external vacuum. A third passageway is downstream of the first and second passageways and configured to output the pressurized air and abrasive media to an engine.

An engine valve cleaning system is disclosed. The system includes a first tube configured to deliver pressurized air, a second tube configured couple to an abrasive media source and draw an abrasive media therefrom, and a spray applicator. The spray applicator includes a first passageway coupled to the first tube and configured to deliver pressurized air, and a second passageway coupled to the second tube and configured to deliver the abrasive media. The first passageway intersects the second passageway such that a passing of the pressurized air past the second passageway draws the abrasive media from the abrasive media source without the necessary for an external vacuum. A third passageway is downstream of the first and second passageways and configured to output the pressurized air and abrasive media to an engine.

A system for blast-cleaning a barge bottom providing for safety and avoidance of damage to the barge and to persons, where a barge is blast-cleaned with a blasting tractor having a transverse track beam along which positioning units move blaster heads. In one embodiment, the blasting tractor is controlled by a person in a cab of the blasting tractor, where the operator can see the blaster heads. In another embodiment, the blasting tractor is robotically controlled from a robotic controller which has access to a three-dimensional plan of the barge, communicating with the robotic blasting tractor via RF antennae, and receiving real-time data from sensors located on each blaster head. Optionally, the system for blast-cleaning a barge can provide blaster-head cameras for real-time remote monitoring of operations and for recording of the operations allowing review of any issue, such as damage, that might arise.