Boiler for the combustion of liquid or gaseous fuels
Patent 4109614 Issued on August 29, 1978. Estimated Expiration Date: 
March 28, 1997. 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.
March 28, 1997. 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 References 2123444 2751200 2970812 3016893 3120838 InventorApplicationNo. 05/781642 filed on 03/28/1977US Classes:122/149, Return fire tube122/367.3, Corrugated and finned heat transmitters165/154NON-COMMUNICATING COAXIAL ENCLOSURESExaminersPrimary: Sprague, Kenneth W.Attorney, Agent or FirmInternational ClassesF24H 1/26 (20060101)F24H 1/22 (20060101) Foreign Application Priority Data1976-03-27 DEAbstractA boiler for the combustion of liquid or gaseous fuels comprises a water-carrying housing in which is provided a cylindrical chamber for receiving the combustion chamber and the fuel gas flues, with a reversion chamber coupled ahead thereof, and with the chamber being surrounded by a plurality of circumferentially distributed flue channels disposed in spaced and side-by-side relationship and in cross section formed by approximately U-shaped sheet metal profiles, which channels are in communication with a flue gas collecting chamber provided with a flue gas discharge and are connected by longitudinal welding seams to the inner wall of the cylindrical chamber. | |
