Self-contained solid fuel boiler system

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Description

FIG. 1 is a front elevational view of our new self-contained solid fuel boiler system showing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
2141764 December 1938 Riddell
2174901 October 1939 Staley
3316894 May 1967 Ramey et al.
4127107 November 28, 1978 Melgeorge
Patent History
Patent number: D263417
Type: Grant
Filed: Nov 26, 1979
Date of Patent: Mar 16, 1982
Assignee: Energy Resource Systems, Inc. (Minneapolis, MN)
Inventors: Frederick J. Keller (Long Lake, MN), Walter G. Horton (Isanti, MN)
Primary Examiner: Catherine E. Kemper
Law Firm: Schroeder, Siegfried, Vidas, Steffey & Arrett
Application Number: 6/97,306
Classifications
Current U.S. Class: D23/86
International Classification: D2305;