Gas boiler, particularly for central heating
Patent 4055152 Issued on October 25, 1977. Estimated Expiration Date: 
October 25, 1994. 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.
October 25, 1994. 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 3302684 3315646 3701340 3765823 3895608 InventorApplicationNo. 05/693627 filed on 06/07/1976US Classes:122/235.11, WATER TUBE122/367.3, Corrugated and finned heat transmitters431/157MEANS AT CHAMBER OUTLET ESTABLISHING COMBUSTION PRESSURE DISTINCT FROM AMBIENTExaminersPrimary: Sprague, Kenneth W.Attorney, Agent or FirmForeign Application Priority Data1975-06-09 FRAbstractGas-burning boilers have in a chamber a plurality of finned heat-exchange tubes arranged around a central gas burner which is substantially of the same length as the finned tubes. An extraction fan draws gases from the chamber such that the chamber works under sub-atmospheric pressure which is preferably 12 mm water column or more below atmospheric.Baffles provide that hot gases must pass over the heat-exchange tubes as they go from the burner to the fan. A self-operating pressure regulator may be provided for the chamber, and various advantages constructions of burner are disclosed which give silent and evenly distributed burning of the gases. The burner is arranged on a horizontal axis and so as to be withdrawable as a unit from the chamber without affecting the heat-exchanger tubes or baffle arrangements. | |
