A remotely operated abrasive blasting apparatus is provided. Systems incorporating the apparatus, and methods of treating surfaces using the apparatus and systems are also provided. The abrasive blasting apparatus eliminates the need for human operators to be present in the area being treated, and allows areas inaccessible to human operators to be treated.

The invention relates to a cleaning appliance for blasting surfaces to be treated with a mixed stream of a pressurized gas and CO.sub.2 pellets, said cleaning appliance comprising an apparatus for producing CO.sub.2 pellets from liquid or gaseous CO.sub.2, wherein the apparatus comprises a pre-compression device for compressing CO.sub.2 snow to form the CO.sub.2 pellets, wherein the cleaning appliance comprises a drive device with a drive shaft for driving the compressing device, and wherein the drive shaft, during the intended use of the cleaning appliance, extends in parallel or substantially in parallel to the direction of gravity.

A pneumatic-controlled abrasive blasting system that includes a blast hose; and a deadman assembly coupled with the blast hose. The deadman assembly has a primary deadman valve; and a secondary deadman valve. There is an air source configured for fluid communication with each of the primary and secondary deadman valves and the blast hose. There is a regulator valve disposed between the deadman assembly and the air source. The regulator is configured to reduce the pressure of airflow to the deadman assembly.

A pneumatic-controlled abrasive blasting system that includes a blast hose; and a deadman assembly coupled with the blast hose. The deadman assembly has a primary deadman valve; and a secondary deadman valve. There is an air source configured for fluid communication with each of the primary and secondary deadman valves and the blast hose. There is a regulator valve disposed between the deadman assembly and the air source. The regulator is configured to reduce the pressure of airflow to the deadman assembly.

An apparatus for abrasive cleaning includes an abrasive media storage vessel for storing a supply of abrasive media at ambient pressure. The storage vessel has an outlet for supplying abrasive media into a first gas stream at a first gas pressure in a first flow passage, the first flow passage supplying a mixture of gas and abrasive media to an outlet nozzle. A main gas stream communicates with the outlet nozzle via a second flow passage at a second gas pressure, the second gas pressure being higher than the first gas pressure. The mixture of gas and abrasive media from the first flow passage is entrained into the main gas stream from the second flow passage in or downstream of the outlet nozzle.

The temperature of the chamber housing a shot wheel of a shot blaster is controlled by positioning a fan exterior to the chamber that creates air flow across a mounting plate defining the chamber. The air flow created by the fan may also pass around the bearing surrounding the drive shaft that turns the shot wheel.

The temperature of the chamber housing a shot wheel of a shot blaster is controlled by positioning a fan exterior to the chamber that creates air flow across a mounting plate defining the chamber. The air flow created by the fan may also pass around the bearing surrounding the drive shaft that turns the shot wheel.

The temperature of the chamber housing a shot wheel of a shot blaster is controlled by positioning a fan exterior to the chamber that creates air flow across a mounting plate defining the chamber. The air flow created by the fan may also pass around the bearing surrounding the drive shaft that turns the shot wheel.

The temperature of the chamber housing a shot wheel of a shot blaster is controlled by positioning a fan exterior to the chamber that creates air flow across a mounting plate defining the chamber. The air flow created by the fan may also pass around the bearing surrounding the drive shaft that turns the shot wheel.

A venturi cartridge regulating device for an air-particle dispensing system is provided, which is designed to be pre-assembled and installed in a chamber capable of atmospheric pressurization to regulate the required proportions of air and particle in a mixture formed upon activation by a propellant source and to direct a stream of a particle-gas mixture out of the chamber toward a targeted surface. The apparatus includes a chamber comprising a first plurality of inlet holes and a second plurality of inlet holes; and a conduit arranged at least partially within the chamber having a first opening arranged in the chamber. The first plurality of inlet holes is configured to intake a first substance, the second plurality of inlet holes is configured to intake a second substance, and a mixture of the first and second substances is created and mixture enters the conduit through the first opening.