An abrasive jet apparatus configured to machine features into an inner diameter of bored structures. In the abrasive jet apparatus, an abrasive mixture of pressurized liquid and abrasive particles is propelled as an abrasive jet in a direction other than the direction in which the abrasive jet apparatus extends. The abrasive jet apparatus may be implemented in an automated boring system and boring method for machining rifling grooves and other features into bored structures. The boring system and boring method use an iterative process of mapping a target surface of the bored structure and adjusting parameters of the boring system in between successive passes of the abrasive jet on the target surface.

A waterjet cutting method is provided which includes directing a waterjet onto a surface of a workpiece that is exposed to the surrounding atmosphere, the interaction of the waterjet with the exposed surface defining a cutting location, and simultaneously directing a gas stream onto the exposed surface of the workpiece at or adjacent the cutting location to maintain a cutting environment at the cutting location that is, apart from the waterjet, substantially devoid of fluid or particulate matter. The method may further include moving a source of the waterjet relative to the workpiece to cut the workpiece along a desired path while continuously directing the gas stream onto the exposed surface of the workpiece at or adjacent the cutting location.

A dental apparatus for generating a jet of gas mixed with solid powder particles, comprised of a hand piece connected to a powder feeder, and attached by a supply cable to a source of electricity, compressed gas and liquid. The tip of the hand piece, which provides the jet of gas with solid powder particles, is comprised of a converging-diverging nozzle, where the converging-diverging nozzle inlet is operably coupled with a source of compressed gas and the diverging portion of this nozzle is operably coupled with a powder feeder. Compressed gas passing through this converging-diverging nozzle accelerates in the diverging portion to supersonic speed and creates a vacuum environment. This results in aspiration of solid powder particles from the feeder into this supersonic jet of gas. where the particles become entrained and accelerate to the nozzle outlet.

A method for descaling a sheet of metal include first and second descaling components that each have a only one motor driven slurry propelling impeller mounted on a top and bottom of an enclosure. The top and bottom mounted impellers of the first component are configured to propel slurry onto a sheet of metal passing through the enclosure across the entire width of the sheet of metal in a first direction extending from one lateral side to an opposite lateral side of the enclosure. The top and bottom mounted impellers of the second component are configured to propel slurry onto a sheet of metal passing through the enclosure across the entire width of the sheet of metal in a second direction opposite the first direction and extending from the opposite lateral side to the one lateral side of the enclosure.

The peening apparatus includes a processing tank, a table, a moving unit including a nozzle moving device, a quill, a first head having a mounting hole and disposed at a distal end of the quill, a motor and a first spindle exposed from the mounting hole, a nozzle head portion separable from the moving unit and including a second head having a connection port connected to the mounting hole, a connecting shaft connected to the first spindle, a second spindle, a nozzle disposed below the second spindle, a nozzle flow path penetrating inside the second spindle and connected to the nozzle to be opened to an upper end of the second spindle, and a swivel joint disposed at an upper end portion of the second spindle and connected to the nozzle flow path.

A method of cleaning a railhead uses a high pressure water abrasive slurry system. A slurry including an abrasive particulate and water is applied to the railhead at a pressure of at least 350 bar. A train incorporates an apparatus for cleaning a railhead, which includes a slurry mixing unit configured to contain a slurry including an abrasive particulate and water. At least one nozzle is in fluid communication with the slurry mixing unit. The at least one nozzle is configured to apply the slurry to the railhead at a pressure of at least 350 bar.

A tank assembly. Said tank assembly comprises a one or more blister assemblies, a shell assembly, a one or more air inlet hoses, a one or more spray equipment and a slurry mixture. Said one or more blister assemblies comprises a first blister assembly and a second blister assembly. Said one or more blister assemblies comprise a one or more draw tubes, a one or more cone flanges, a one or more head assemblies, a one or more shells, a one or more cone assemblies, an air line assembly, a one or more snorkel assemblies, and a separation distance. Said one or more draw tubes comprise a first draw tube and a second draw tube. Said separation distance between said one or more draw tubes is configured to allow said one or more spray equipment to rotate freely on said one or more draw tubes without interfering with one another.

A device for cutting a cuttable material with the aid of a fluid, in particular for water-jet cutting, may include a pressure-generating unit and an outlet nozzle that is fluidically connected to the pressure-generating unit via a fluid line. The pressure-generating unit may pressurize the fluid in the fluid line. The device may further comprise a pulsation damper for damping pressure fluctuations in the fluid line. The device may also include at least one switching valve such that, depending on a switching position of the switching valve, the pulsation damper is couplable to the fluid line and uncouplable from the fluid line.

In some aspects, waterjet cutting pressurization systems can include a water pump: (i) having a pressurization chamber and (ii) having a high-pressure water seal maintaining water pressure within the chamber; and a leak detector in fluid communication with the high-pressure water seal and configured to monitor a leak rate of a fluid from the high-pressure water seal.

A waterjet cutting head assembly is provided which includes an orifice unit to generate a high-pressure waterjet, a nozzle body and a nozzle component coupled to the nozzle body with the orifice unit positioned therebetween. The nozzle component may include a waterjet passage, at least one jet alteration passage and at least one environment control passage. The jet alteration passage may intersect with the waterjet passage to enable selective alteration of the waterjet during operation via the introduction of a secondary fluid or application of a vacuum. The environment control passage may include one or more downstream portions aligned relative to the fluid jet passage so that gas passed through the environment control passage during operation is directed to impinge on an exposed surface of a workpiece at or adjacent to a location where the waterjet is cutting the workpiece. Other high-pressure waterjet cutting systems, components and related methods are also provided.