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| Number | Title | Issue Date |
| 5412910 | Wet abrasive blasting method and apparatus An abrasive feed system is shown in FIG. 3 in which pressurized air from air compressor (10A) is cooled and dried by heat exchanger (123A), water separator (125A) and chemical air dryer (127A) for delivery to a differential pressure regulator (104A) and a... | 05/09/1995 |
| 5317841 | Method for removal of surface contaminants from metal substrates A method is disclosed for removing water soluble salts from a metal substrate in a wet blast system in which a bicarbonate abrasive is blasted in a pressurized water stream against the surface of the metal substrate to prepare the surface for the applicat... | 06/07/1994 |
| 5239788 | Abrasive feed system In accordance with illustrative embodiments of the present invention, a hopper containing a sodium bicarbonate abrasive is pressurized with a dry gas such as nitrogen. The abrasive is fed into a transport line through which compressed air flows toward a n... | 08/31/1993 |
| 4922664 | Liquid sand blast nozzle and method of using same A method and apparatus is disclosed for using a nozzle to propel abrasive particles with high pressure water. The nozzle has a straight line path for a constant flow rate of air and abrasive particles to a propulsion chamber. A water path through the nozz... | 05/08/1990 |
| 4878320 | Abrasive feed system In accordance with illustrative embodiments of the present invention, a hopper containing a sodium bicarbonate abrasive is pressurized with a dry gas such as nitrogen. The abrasive is fed into a transport line through which compressed air flows toward a n... | 11/07/1989 |
| 4821467 | Control system for liquid propelled abrasive cleaning A liquid-propelled abrasive cleaning apparatus comprising a nozzle for applying a high pressure stream of water and propelled sand particles to a surface to be cleaned; a pump for furnishing water under high pressure to the nozzle, the pump being of a kin... | 04/18/1989 |
| 4817342 | Water/abrasive propulsion chamber A propulsion apparatus adapted for use in a liquid propelled abrasive cleaning system is disclosed in which high pressure water is injected coaxially in a bore of a housing to which a flow of air and abrasive is introduced. The high pressure water is intr... | 04/04/1989 |
| 4815241 | Wet jet blast nozzle In accordance with an illustrative embodiment of the present invention disclosed herein, a liquid propelled blast nozzle apparatus includes a body having first and second bores which receive, respectively, a pressurized flow of sand particles and a high p... | 03/28/1989 |
