The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2001
Filed:
Feb. 12, 1999
William MacFarlane, Derbyshire, GB;
Steve Cherico, North Olmstead, OH (US);
Dale R. Miller, II, Middleburg Heights, OH (US);
Cetek Limited, Berea, OH (US);
Abstract
It is possible to clean high temperature (over 400, e. g. over 1000, degrees F) surfaces in a time and cost efficient manner by using a liquid-cooled ceramic welding lance to direct (at super-atmospheric pressure) a blasting media at the surfaces to be cleaned. The blasting media is preferably combustible at the temperature of the environment surrounding the surfaces, and may include one or more organic agricultural abrasive materials (preferably black walnut shells) as the sole or primary constituent. Blasting may be practiced by directing the media at the surfaces to be cleaned at a pressure of between about 40-100 psi, for example continuously for as long as is necessary (e. g. more than 30 minutes), without any need to remove the lance from the environment. The method is desirably practiced to clean, while in operation or in situ, metal surfaces having scale buildup which adversely affects the ability of the metal surfaces to transfer heat, reheat tubes, process tubes, furnace surfaces, or the like.