Central heating boiler

Details Central heating boiler Central heating boiler

1981-07-22

1983-07-26

Yuen, Henry C.

Liquid heaters and vaporizers

Stand boiler

122136C, 122367C, 122160, F22B 700

Patent

active

043948480

ABSTRACT:
A central heating boiler comprising a combustion chamber, flue gas passages, a flue gas collecting chamber and a liquid jacket surrounding both the combustion chamber and the flue gas passages, the inner wall part of said jacket surrounding the flue gas passages being composed of interwelded section staves, of which each one confines a flue gas passages, said inner wall part being very rigid, all other wall parts of the jacket being made of sheet metal and having such shapes and dimensions, as to ensure that the thermal stresses set up by the differences in expansion and shrinkage of the wall parts of the jacket remain under the breaking point of the sheet metal wall parts of the jacket and their welded points.

REFERENCES:
patent: 460158 (1891-09-01), Pandee
patent: 480406 (1892-08-01), Kennedy
patent: 529121 (1894-11-01), Gardner
patent: 588016 (1897-08-01), Sadtler
patent: 2440998 (1948-05-01), Alexander
patent: 3734066 (1973-05-01), Scheyen
patent: 4169431 (1979-10-01), Viessmann
patent: 4192259 (1980-03-01), Viessmann
patent: 4327672 (1982-05-01), Viessmann

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