According to the present invention, the distance between a spray nozzle and a surface to be constructed is kept constant, and the spray nozzle is moved smoothly to perform water jet peening in a suitable state of construction. A water jet peening device has a spray nozzle (8) for spraying a water jet, the spray nozzle being capable of moving along a predetermined movement trajectory so that a spray port (8a) of the spray nozzle points upward or downward.

A waterjet system is provided, including a pump configured to pump fluid, an electric motor configured to drive the pump, a hopper configured to store abrasive, and a mixing chamber configured to mix abrasive from the hopper and the fluid from the pump to produce a slurry. A cutting bed is configured to receive a workpiece to be cut. A cutting head is configured to expel the slurry through the outlet nozzle as a high-velocity jet into the cutting bed.

The invention is directed toward wet-abrasive blasting systems used for cleaning, preparing surfaces, removing coatings, and other abrasive blasting applications. The wet abrasive basting system has a blast pot that includes a venting system. The venting system may be a self-venting system that allows gases to be vented during charging and prevents gases from accumulating in the blast pot during operation. In wet abrasive blasting systems a slurry is conveyed via a piping system, hoses, etc. to a mixer connected to a source of pressurized gas where slurry and compressed air/gas are combined and directed through the blast hose and blast nozzle.

Provided herein are a system and method for an efficient and safe method for the removal of surfacing materials which may contain toxic components from a work surface through wet blasting. The method and apparatus provided may utilize a mixture of surfactant and water combined with abrasive media for use in a wet blasting operation in which the creation of waste in solid dust form is reduced or substantially prevented.

A waterjet system in accordance with a particular embodiment includes a pressurizing device configured to pressurize a fluid, a cutting head downstream from the pressurizing device, and a catcher positioned to collect a jet from the cutting head. The system can further include a treatment assembly configured to treat a feed fluid to the pressurizing device and/or a byproduct fluid from the catcher, such as by removing submicron colloidal particles from the feed fluid and/or from the byproduct fluid. For example, the treatment assembly can include a coagulation unit, such as a chemical coagulation unit or an electrocoagulation unit, configured to coagulate the submicron colloidal particles. The pressurizing device, the cutting head, and the treatment assembly can be at different respective portions of a fluid-recycling loop.

A water-abrasive suspension cutting facility with at least one high-pressure source (2) which provides a carrier fluid at a high pressure, with at least one exit nozzle (6), with a high-pressure conduit (4) connecting the high-pressure source (2) to the exit nozzle (6), as well as with an abrasive agent feed lock (16). The abrasive agent feed lock (16) is connected to the high-pressure conduit (4) and includes an entry side shut-off element (26) and an exit-side shut-off element (24). A lock chamber (18) is arranged between the entry side shut-off element (26) and an exit-side shut-off element (24). A suction device (30) is configured for producing a reduced pressure in the lock chamber (18) and is connected to the lock chamber (18).

An abrasive blasting system that includes a blast hose; and a deadman assembly operably coupled therewith for controlling discharge out of the blast hose. The deadman assembly has a position of either a signal-flow or a no-flow position. When engaged to the signal-flow position, a burst or pulse of purge air is transferred to a mixer via a water injection conduit.

Waterjet cutting apparatus and related methods are disclosed herein. An example apparatus includes a tank defining a volume to contain a fluid therein, a fixture extending from the tank, and a tube extending from the tank, the tube to isolate the fixture and a part supported by the fixture from turbulence of the fluid disposed in the tank.

A dental hygiene system includes a feed line for a liquid that engages and dissolves a dental cleansing compound before being discharged from a nozzle connected to the feed line and sprayed on the teeth for cleaning.

A seal assembly seals a gap between a pump plunger and a high pressure cylinder of a pump. The assembly includes a seal ring having a bore through which the plunger can extend, a front axial end, and a rear axial end. An O-ring is positioned on the seal ring. A packing ring has a bore through which the plunger can extend, a front axial end abutting the rear axial end of the seal ring, and a rear axial end. A non-metal packing follower has a bore through which the plunger can extend, a front axial end abutting the rear axial end of the packing ring, and a rear axial end. The non-metal packing follower can be ceramic (e.g., carbide) or similar hard, wear-resistant materials.