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. 20, 1996
Filed:
Oct. 27, 1994
Patrick A Gowens, Carol Stream, IL (US);
AEC, Inc., Wood Dale, IL (US);
Abstract
An improvement in a water chiller of the kind used for industrial processes such as electrical discharge machining (EDM). The chiller includes a reservoir for water (frequently de-ionized water), an evaporator, refrigerating apparatus such as a condenser and a compressor, and a pump; there is a supply line connection to an electrical discharge machining apparatus or other industrial process apparatus, and a return line connection. The pressure in the return line is usually lower than the pressure in the supply line. The improvement includes a fitting connected in series in the supply line and a bypass line connected to that fitting to afford a bypass flow of water in parallel with the process apparatus. A flow-limiting orifice member in series in the bypass line limits the bypass flow to a predetermined rate; the rate may be determined by the pressure differential between the supply and return lines. All fittings are formed of non-ionizing resins such as nylon; the orifice member is stainless steel. There is no valve in the bypass.