Combustion tube

Information

FIG. 1 is a perspective view of the combustion tube;

FIG. 2 is a front elevational view of the combustion tube, it being understood that the tube is symmetrical;

FIG. 3 is a top plan view of the combustion tube; and,

FIG. 4 is a bottom plan view o the combustion tube.

Number	Name	Date	Kind
2382301	Dreher	Aug 1945	A
2593015	Dreher	Apr 1952	A
2610107	Dreher	Sep 1952	A
2809100	Krasl	Oct 1957	A
2836482	Dreher	May 1958	A
3570419	Brandenberger	Mar 1971	A
3923464	Sitek et al.	Dec 1975	A
3957441	Baba	May 1976	A
4133641	Lueck	Jan 1979	A
4234541	Bredeweg et al.	Nov 1980	A
5110554	Tanimoto	May 1992	A
20110075696	Ford	Mar 2011	A1

Entry
U.S. Appl. No. 13/198,746, filed Aug. 5, 2011 entitled “Combustion Furnace Auto Cleaner”.