Ultra pure water heater with coaxial helical flow paths
Patent 5590240 Issued on December 31, 1996. Estimated Expiration Date: 
May 30, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 30, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 453480 filed on 05/30/1995US Classes:392/483, Heating element producing radiation165/184HelicalExaminersPrimary: Jeffery, John A.Foreign Patent References
International ClassF24H 001/16AbstractA high efficiency, non-contaminating fluid heater, including inner and outer helical passageways formed from an electrically non-conductive material and through which ultra pure fluid, such as ultra pure water, passes as it is heated. A coiled resistance heater is disposed about the helical outer surface of the inner helical passageway to heat by radiation, conduction and convection the ultra pure fluid which flows through the inner passageway. The outer passageway substantially surrounds the inner passageway and, at least in part, supports the outer passageway. The outer helical passageway is disposed to enable ultra pure fluid flowing therethrough to absorb radiated and convected heat from the coiled resistance heater to increase the efficiency of the fluid heater.Field of SearchCoiledExternally heated line connected section Pipe or tube forms flow path Heating element producing radiation Disposable cartridge, tube or bag forms heated flow path (e.g., blood bag, etc.) Helical Helical conduit means HELICAL OR WOUND RESISTANCE ELEMENT Plural supported helices or windings Element coiled on cylindrical or prismatic core Element on frame or support | |
