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:
Jun. 30, 1998
Filed:
Jul. 12, 1996
John F Stucker, Scottsdale, AZ (US);
R.R. Street & Co. Inc., Naperville, IL (US);
Abstract
Method and system of rejuvenating pressurized fluid solvents used for cleaning a substrate in a pressurized vessel. A primary flow of the pressurized fluid solvent is continuously cycled from the pressurized vessel through a series of filters to remove insoluble and soluble contaminants, and then returned to the pressurized vessel. A secondary flow of the pressurized fluid solvent, preferably equivalent to less than about 40% of the primary flow, is directed either continuously or intermittently during the cleaning operation to an evaporator to evaporate the pressurized fluid solvent of the secondary flow into a vapor and to separate contaminants therefrom. The vapor from the evaporator is then either liquified by a compressor or condenser to create rejuvenated pressurized fluid solvent and redirected to the pressurized vessel for further use, or vented to atmosphere and replaced by new pressurized fluid solvent from a supply tank. Pressure equalization lines extend between a storage tank and various system components to allow solvent vapor to displace therebetween.