The adverse effects associated with high temperatures and warpage of parts of a shot blaster are ameliorated by providing a telescoping sleeve and valve mount and an orifice adaptor to regulate the area of the flow path from a shot reservoir to a metering valve.

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.

A micro-abrasion sandblast device having a tank for containing a supply of abrasive media and having a media outlet on a base thereof and a cabinet attached to the tank and providing a first inlet to which an external source of compressed air is connectable and a second inlet to which an external source of water is connectable. A media valve is located adjacent the base of the tank for receiving media from the media outlet and compressed air from the cabinet. A blast hose coupler connects to and extends from the media valve for receiving the media and compressed air from the media valve.

An apparatus includes a moving device movable along the surface of an object, and a rotary nozzle device. A rotary nozzle means comprise a plurality of jet nozzles. Two sets of the rotary nozzle means are arranged in parallel in a direction orthogonal to the moving direction of the moving device, are configured such that a left rotary nozzle means and a right rotary nozzle means perform a rotary motion in association with each other by a rotary transmission means. The jet nozzle of the left rotary nozzle means and the jet nozzle of the right rotary nozzle means are arranged so as to be out of phase with each other.

The adverse effects associated with high temperatures and warpage of parts of a shot blaster are ameliorated by providing a telescoping sleeve and valve mount and an orifice adaptor to regulate the area of the flow path from a shot reservoir to a metering valve.

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.

The self-propelled high-performance shot-peening machine combined with a scarifying machine, for the treatment of coatings surfaces of bituminous conglomerate, asphalt, concrete or metal, is composed of a shot-peening unit (A-A), a suction, filtering, separation and storage unit (B-B), a scarifying unit (C-C) and a mechanic-magnetic unit (d-D) coupled together.

It comes typically to solve the problem of the removal of the new typologies of drop or lamellar road markings, with subsequent regeneration of the macro and micro roughness of the road coating,

subjecting the surface to be treated to two treatmentsintegrated milling and shot-peeningby a single pass, adapting itself to the road profile and guaranteeing to remove only the protruding part of the road markings, subsequently immediately regenerating the roughness and microroughness of said surface, noticeably reducing the critical factor of the working time, eliminating the possibility of error in the application of the treatment.

The basic principle consists in utilizing the six-drum scarifying machine 20, 20 only to remove the protruding parts without breaking into the road coating, the number of rollers of the drums 21, 22, 23, 24, 25, 26 and the rotation speed being automatically chosen by the programme to optimize results and working speed; same principle applies to the shot-peening, where the rotation speed and the quantity of abrasive can vary, aiming to the highest yield and speed, the whole managed by a system software implemented by an electric device like PLC, Tablet, Smartphone or Wi-Fi Server-Router.

It solves also the problem of the recycling of the grit by its overheating with sticking of the bituminous, gummy materials and others, performing their removal by a single pass and their final decontamination from the stuck bituminous materials C in a further subsequent sieve 7 with preliminary cooling by intercooler 7, 7, the avoid their deformation and ovalization for a correct recycling D, 1, 1 and reuse of the microspheres 1, 2, 2.

The technology has been applied to a road lorry with three to five axes, with the aim to have a vehicle allowed to free circulation on the roads to reach the possible yards, airports and so on and to be able to work in moving yards without closing the lane or the section where it is necessary to remove the road markings and remake them immediately after.

An autonomous self-propelled unit (D-D) with suction, storage and housing of the magnetic group completes the regeneration and cleaning action removing from the surface coating any grit possibly dispersed and not recovered by the shot-peeni

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).

A system for internal air blasting of an enclosed space includes a ground vehicle, an arm supported by the ground vehicle, and a blasting nozzle provided at the end of the arm. The blasting nozzle being configured to direct blast media to a desired surface of the enclosed space to be treated by the arm. A method of internal air blasting an enclosed space is further disclosed.