An apparatus for cavitation peening is disclosed, including a fluid source, a conduit, and a portable nozzle assembly. The conduit includes a proximal end portion connected to the fluid source and a distal end portion connected to the portable nozzle assembly. The portable nozzle assembly includes an inner nozzle configured to channel a first stream of high-pressure fluid, and an outer nozzle configured to channel a second stream of low-pressure fluid concentrically around the first stream. The inner nozzle includes a cavitation insert having an inner passage with at least two reductions in cross-sectional area.

A method of processing steel grit may include moving steel grit into a pre-classifier, weighing the pre-classifier with steel grit being processed by the pre-classifier, and altering a functional process to process the steel grit based on the weight of the pre-classifier including the steel grit. A machine for processing steel grit may include a pre-classifier configured to process steel grit to remove debris from the steel grit. A support member may be configured to support the pre-classifier. Multiple rotatable link assemblies may connect the pre-classifier to the support member to enable the pre-classifier to freely rotate as a function of gravity when supported from the support member. A weight sensor may be configured to weigh the pre-classifier including steel grit contained in the pre-classifier.

A method of processing steel grit may include moving steel grit into a pre-classifier, weighing the pre-classifier with steel grit being processed by the pre-classifier, and altering a functional process to process the steel grit based on the weight of the pre-classifier including the steel grit. A machine for processing steel grit may include a pre-classifier configured to process steel grit to remove debris from the steel grit. A support member may be configured to support the pre-classifier. Multiple rotatable link assemblies may connect the pre-classifier to the support member to enable the pre-classifier to freely rotate as a function of gravity when supported from the support member. A weight sensor may be configured to weigh the pre-classifier including steel grit contained in the pre-classifier.

A shot treatment apparatus and a shot treatment method applicable to the mass production of a wide range of products. A shot treatment apparatus, comprising: a spinning table which has a first rotary shaft and which holds and rotates a workpiece; an ejection apparatus that ejects a shot media from a nozzle to the workpiece; a cabinet having a treatment chamber formed therein; and a control apparatus comprising a first control unit that controls the ejection apparatus, the nozzle being held so as to be positionable and three-dimensionally swingable with respect to the workpiece.

An ice blasting system comprising a hopper to receive bulk ice and a rotary crusher disposed inside the hopper, the rotary crusher having rotary crusher arms that cooperate with anvils to produce crushed ice from the bulk ice. The system includes a rotary feeder mechanism disposed below the hopper, the rotary feeder mechanism having a rotor that includes ice-receiving pockets for receiving the crushed ice. The rotor rotates against an airtight seal block and delivers the crushed ice into a high-pressure airstream passing through the rotary feeder mechanism to thereby entrain the crushed ice into the high-pressure airstream whereby the ice-entrained airstream subsequently exits the ice blasting system through an outlet.

An ice blasting system comprising a hopper to receive bulk ice and a rotary crusher disposed inside the hopper, the rotary crusher having rotary crusher arms that cooperate with anvils to produce crushed ice from the bulk ice. The system includes a rotary feeder mechanism disposed below the hopper, the rotary feeder mechanism having a rotor that includes ice-receiving pockets for receiving the crushed ice. The rotor rotates against an airtight seal block and delivers the crushed ice into a high-pressure airstream passing through the rotary feeder mechanism to thereby entrain the crushed ice into the high-pressure airstream whereby the ice-entrained airstream subsequently exits the ice blasting system through an outlet.

Essential constructive elements of the currently known machines and devices, which work by means of vacuum blasting, are improved in the surface cleaning and engraving machine that operates via a vacuum jet process in order to enable more effective cleaning of different surfaces, further applications and simplification of the handling of the machine or device. With the modifications and additions made, the application options of the machine or device are increased, the potential of clogging the suction hose is reduced to a minimum, the service life of the machine is extended and the efficiency and operating options of the blasting hood are improved. For this purpose, technical and design details of an already known machine are supplemented and improved; there are, for instance, a metering device (3), additions to the blasting hood (6) and measures to extend the service life of the machine by using rock impact films (31).

Control of a self-powered floor preparation machine is provided by an ergonomic controller having a guarded control stick which has various characteristics, including its pitch, roll, yaw and height, that may all be adjusted.

An actuator is configured to couple with a controlled member and includes first and second pistons disposed in respective internal chambers. The first piston may be moveable between first and second positions. The second piston may be moveable between third and fourth positions. The second piston may be configured not to engage the first piston when the second piston is disposed at the third position. The second piston may be configured to move the first piston to the second position as the second piston moves from the third position to the fourth position. A resilient member may be disposed to resiliently urge the second piston toward the fourth position.

Aspects of the present application include a configurable blast gun plate assembly, which allows the workpiece processing apparatus to accommodate workpieces of different shapes and sizes. In an embodiment, a blast gun assembly for processing workpieces includes a platform, a blast gun support structure disposed on the platform, a blasting gun held onto the platform via the collar and the blast gun support structure. The platform is substantially horizontal, and the blast gun support structure is configured to releasably hold the collar in a predetermined position.