Abrading – Abrading process – Utilizing fluent abradant
Patent
1994-01-27
1996-01-16
Kisliuk, Bruce M.
Abrading
Abrading process
Utilizing fluent abradant
451102, 451 90, 451 91, B24C 500
Patent
active
054843251
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to blast nozzles and a process for removing adherent material such as paint, scale, dirt, grease and the like from solid surfaces with abrasive particles propelled by air. In particular, the present invention is directed to a novel blast nozzle having specified dimensions to improve cleaning efficiency. A water atomizer means useful to control the dust caused by blasting with an abrasive and friable media such as sand or sodium bicarbonate can be added to the blast nozzles of this invention.
2. Description of the Prior Art
In order to clean a solid surface so that such surface can again be coated such as, for example, to preserve metal against deterioration, or simply to degrease a solid surface such as surfaces contacting food or building structures which contain food serving or food processing operations, it has become common-practice to use an abrasive blasting technique wherein abrasive particles are propelled by a high pressure fluid against the solid surface in order to dislodge previously applied coatings, scale, dirt, grease or other contaminants. Various abrasive blasting techniques have been utilized to remove the coatings, grease and the like from solid surfaces. Thus, blasting techniques comprising dry blasting which involves directing the abrasive particles to a surface by means of pressurized air typically ranging from 30 to 150 psi, wet blasting in which the abrasive blast media is directed to the surface by a highly pressurized stream of water typically 3,000 psi and above, multi-step processes comprising dry or wet blasting and a mechanical technique such as sanding, chipping, etc. and a single step process in which both air and water are utilized either in combination at high pressures to propel the abrasive blast media to the surface as disclosed in U.S. Pat. No. 4,817,342, or in combination with relatively low pressure water used as a dust control agent or to control substrate damage have been used. Water for dust control has been mixed with the air either internally in the blast nozzle or at the targeted surface to be cleaned and such latter process, although primarily a dry blasting technique, is considered wet blasting inasmuch as media recovery and clean up is substantially different from that utilized in a purely dry blasting operation.
A typical dry blasting apparatus as well as a wet blasting apparatus which utilizes highly pressurized air to entrain, carry and direct the abrasive blast media to the solid surface to be treated and low pressure water for dust control comprises a dispensing portion in which the blast media typically contained in a storage tank is entrained in highly pressurized air, a flexible hose which carries the air/blast media mixture to the blast nozzle and which allows the operator to move the blast nozzle relative to the surface to be cleaned and the blast nozzle which accelerates the abrasive blast media and directs same into contact with the surface to be treated. Water is added either internally in the blast nozzle and mixed with the air stream passing therethrough or a low pressure stream of water is provided externally of the blast nozzle and directed at the surface to be treated so as to control dust. The blast nozzle is typically hand-held by the operator and moved relative to the targeted surface so as to direct the abrasive blast media across the entire surface to be treated.
The blast media or abrasive particles most widely used for blasting surfaces to remove adherent material therefrom is sand. Sand is a hard abrasive which is very useful in removing adherent materials such as paint, scale and other materials from metal surfaces such as steel. While sand is a most useful abrasive for each type of blasting technique, there are disadvantages in using sand as a blast media. For one, sand, i.e., silica, is friable and upon hitting a metal surface will break into minute particles which are small enough to enter the lungs. These minute silica particles pose
REFERENCES:
patent: 672164 (1901-01-01), Callahan
patent: 2324250 (1943-07-01), Voerge
patent: 2325517 (1943-07-01), Howard
patent: 2376287 (1945-05-01), Sorrentino
patent: 2376616 (1945-05-01), Oeschsle et al.
patent: 2387193 (1945-10-01), Swenarton
patent: 2440334 (1948-04-01), Gerlach
patent: 2543517 (1951-02-01), Anderson
patent: 2587184 (1952-02-01), Marjama
patent: 2644275 (1953-07-01), Hoguet
patent: 2666279 (1954-01-01), Chalom
patent: 2669809 (1954-02-01), McGrath
patent: 2717476 (1955-09-01), Myers
patent: 2723498 (1955-11-01), Hastrup et al.
patent: 2875521 (1959-03-01), Tascher
patent: 3858358 (1975-01-01), Stachowiak et al.
patent: 3972150 (1976-08-01), Hart
patent: 4149345 (1979-04-01), Atsuchi
patent: 4249956 (1981-02-01), Hartman
patent: 4253610 (1981-03-01), Larkin
patent: 4545317 (1985-10-01), Richter et al.
patent: 4551955 (1985-11-01), Zion, Jr.
patent: 4648215 (1987-03-01), Hashish et al.
patent: 4709515 (1987-12-01), Copeland et al.
patent: 4711056 (1987-12-01), Herrington et al.
patent: 4771580 (1988-09-01), Male
patent: 4817342 (1989-04-01), Martin et al.
patent: 5083402 (1992-01-01), Kirschner et al.
patent: 5283985 (1994-02-01), Browning
patent: 5319894 (1994-06-01), Shank
Barris Charles B.
Church & Dwight & Co., Inc.
Kisliuk Bruce M.
Morgan Eileen
LandOfFree
Blast nozzle containing water atomizer for dust control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Blast nozzle containing water atomizer for dust control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blast nozzle containing water atomizer for dust control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-305830