Abstract: A shot blast machine for deflashing plastic molded parts in which a substantially horizontal conveyor belt is used for delivering the parts to be deflashed. Shot blasting wheels are located above the conveyor belt and impel particles downward into deflashing engagement with plastic parts on the conveyor. A wire mesh member, in the form of an endless belt, is positioned above and in close proximity to the conveyor belt so that parts being blasted are trapped and held between the wire mesh belt and the conveyor belt. The wire mesh belt prevents the parts being deflashed from being moved off the conveyor belt under the influence of blasting particles. The hold down belt is also movably mounted above the conveyor belt so that it can float up and down and accommodate parts of different sizes.

Abstract: A the high velocity flame jet apparatus includes a supersonic gun having a main combustion chamber having two parts, one of which is air cooled and the other of which is water cooled. The air cooled portion of the chamber is provided with radial air inlet holes to allow the cooling air to enter the chamber and stabilize combustion. The water cooled portion of the chamber is elongated and terminates in a bend. A powder sprayer is arranged axially in the bent end of the combustion chamber and a removable exit nozzle is coupled to the distal end of the combustion chamber. Different removable nozzles are used for abrasive treatment and coating treatment. The first portion of the combustion chamber is provided with an ignition device coupling for coupling to a removable igniter. The removable igniter is coupled to fuel and oxygen sources and supplies the ignition temperature to the combustion chamber when the apparatus is started. After the gun is ignited, the igniter is removed.

Abstract: A machine tool for cutting workpieces includes a cutting head with at least two cutting units each providing cutting beams directed at the workpiece so as to impinge thereon closely adjacent each other to cooperate in the cutting action. The machine tool includes a worktable to support the workpiece, and the workpiece and cutting head are relatively movable to provide a cutting line in the workpiece. At least one of the cutting units is movable relative to the other so that the angular relationship of the cutting beams may be varied, and the supply of the cutting medium is separately controlled for the cutting units. In one embodiment the cutting beams are high speed water jets which may contain abrasive and the cutting characteristics of the jets may be varied.

Abstract: A blast wheel having a rotatable shaft with discs carrying blades for propelling abrasive material against a surface to be blast-cleaned. Each one of the blades has a striking portion and a dovetail base member. Each one of the discs has a number of circumferential dovetail slots for receiving the base members of the blades. Keeper plates, lock washers and keeper bolts are used to retain each end of each blade in place. Each disc has several sound-abating holes to reduce the rotational noise of the blast wheel.

Abstract: A novel supply pot for holding a particulate abrasive is provided which greatly reduces the amount of moisture which is contained therein during pressurization. The supply pot includes a compressed air piping which directs compressed air from a source of compressed air to an inlet piping to the supply pot and to a downstream inlet to a blast hose, the compressed air piping comprising a moisture diverter which directs the compressed air from the piping to the blast hose initially bypassing the inlet to the supply pot, the diverter allowing backflow of compressed air from the outlet thereof to the inlet to the supply pot.

Abstract: A traveling device having a frame means, and a moving means mounted on the frame means and moving on a travel surface, the moving means comprising a plurality of wheels, or a plurality of endless tracks each including a plurality of belt pulleys is disclosed. The frame means includes a main frame, a pair of oscillating frames arranged on both sides of the main frame, and a connecting frame disposed on one end portion side of the main frame. A central portion of the connecting frame is coupled to the main frame via a monoaxially oscillating joint means, both end portions of the connecting frame are coupled to one end portion of each of the oscillating frames via an omniaxially oscillating joint means, and the other end portion of each of the oscillating frames is coupled to both side portions of the other end portion of the main frame via a biaxially oscillating joint means.

Abstract: Disclosed is a method and apparatus for the blast cleaning of the surface of an object using solid carbon dioxide pellets as the abrasive projected by a gaseous carbon dioxide propellent. The method and apparatus of this invention subjects a portion of a quantity of liquified carbon dioxide contained within a storage vessel to adiabatic expansion to provide a solid phase carbon dioxide and then compressing or extruding the solid phase carbon dioxide to form a plurality of pellets. Another portion of the liquified carbon dioxide is vaporized to provide a volume of gaseous carbon dioxide at above atmospheric pressure which is then used as a carrier and propellent to project the carbon dioxide pellets against the surface of the object to be cleaned. This invention eliminates the need to use a separate compressed air or nitrogen propellent system for a blast cleaning operation.

Abstract: A symmetrically balanced, integrated, portable, refillable, serviceable, adjustable, self contained tool, suitable for single hand operation, for ejecting a stream of particulate, powdered, or liquid material toward a target combining a supply reservoir containing the materials, a portable propellant container adapted to the supply reservoir, carrying compressed propellant liquid, a propellant release valve delivering propellant from the container via a constricted air jet orifice to a angular mixing chamber positioned above the uppermost level of materials the materials supply reservoir, a delivery conduit connecting the lower portion of the supply materials reservoir chamber to the angular mixing chamber through an adjustment valve, delivering a stream of materials aspirated from the materials supply reservoir by the negative atmospheric pressure deferential created by a Venturi effect to the angular mixing chamber, driving the compressed gas and materials through the connected nozzle containing a cylindric

Abstract: A particle blast cleaning apparatus for use with sublimable blast media, a source of compressed gas, and a discharge nozzle. The apparatus includes a mixing device for mixing the sublimable media with compressed gas, which mixing device includes a lower section having an outlet port formed therein and an upper section positioned over the lower section and having two sublimable media inlet ports and a compressed gas inlet port. A transfer member is mounted between the lower section and the upper section for reciprocal movement and has at least two transfer chambers for transporting sublimable media.

Abstract: A blast nozzle for directing a stream of abrasive particles against a surface to remove surface contaminants therefrom further includes an externally attached atomized water nozzle which directs a stream of atomized water particles to the surface to suppress dust formation. Blast nozzles of preferred dimensions to improve productivity of blast cleaning with a sodium bicarbonate blast media are also disclosed.

Abstract: A blast cleaning machine which gravity feeds abrasive material when blasting at positions from angularly upward to angularly downward. The machine includes a housing, a blast assembly, a motor for rotatably driving the blast assembly and a hopper. The housing has a blast corridor, a return corridor and a blast opening communicating with the blast corridor and the return corridor. The blast assembly receives abrasive material from the hopper and propels the abrasive material through the blast corridor and blast opening against the surface to be blast cleaned. The hopper has straight walls which are substantially parallel with the blast opening for gravity feeding abrasive material straight into the blast assembly. The walls of the hopper provide effective gravity feeding of abrasive material to the blast assembly when the machine is blasting anywhere between a 45-degree angle upward and a 45-degree downward.

Abstract: In a method of cleaning fan impellers bursts of solid material are discharged towards the impeller blades or other parts of the impeller, subjected to deposits, by pulses of compressed air, shot from a compressed air cannon. A device for cleaning fan impellers includes at least one compressed air cannon for directing shots in the form of pulses of compressed air towards the impeller blades or other parts of the impeller. The outlet cylinder (280) of the cannon is loaded with a charge of solid material (4) to be discharged towards the impeller blades or said other parts of the impeller, upon shooting a pulse of compressed air.

Abstract: A particle blast cleaning apparatus for use with sublimable blast media, a source of compressed gas, and a discharge nozzle. The apparatus includes a mixing device for mixing the sublimable media with compressed gas, which mixing device includes a lower section having an outlet port formed therein and an upper section positioned over the lower section and having two sublimable media inlet ports and a compressed gas inlet port. A transfer member is mounted between the lower section and the upper section for reciprocal movement and has at least two transfer chambers for transporting sublimable media. A control mechanism is provided for controlling the flow of compressed gas to the compressed gas inlet port such that compressed gas is only provided to the compressed gas inlet port when at least one of the transfer chambers is in fluid communication with the compressed gas inlet port.

Abstract: Wet blasting utilizing a high pressure liquid stream to clean, cut or drill a targeted surface is provided with improved efficiency by degassing the liquid stream. Deaeration of the liquid stream reduces atomization of the high pressure stream as it exits the blast nozzle and is directed against the targeted surface so as to improve the efficiency of the stripping action and improve pump efficiency.

Abstract: A nozzle expels liquid CO.sub.2 through an orifice for converting the liquid into CO.sub.2 snow. The nozzle is contained within an elongated cavity within a body which in turn is coupled to an exhaust nozzle for directing the CO.sub.2 snow toward a workpiece. A mixing device is provided for receiving and mixing pressurized air at ambient temperature with liquid nitrogen for precooling the air and then directing the resulting mixture of gases into the cavity and toward the nozzle. In this manner, the precooled shop air will enhance the efficiency of the conversion of the liquid CO.sub.2 into CO.sub.2 snow particles.

Abstract: A blasting plant for elongated components, such as girders, welded structures, etc., has a blast cabinet, a conveyor for conveying the components through the blast cabinet and centrifugal blast wheels positioned below and above the same and whose blast medium jets are directed against the traversing component, and at least one deflecting device, which is associated with at least one centrifugal blast wheel and deflects the blast medium jet thereof. In order to effectively blast the leading and trailing faces of the component or top or cover plates located there, the deflecting device is adjustable between an inoperative position outside the blast medium jet and an operative position deflecting the same with respect to the vertical in the conveying direction and at least one second deflecting device is provided, which is adjustable between an inoperative position outside the blast medium jet and an operative position deflecting the same relative to the vertical counter to the conveying direction.