Fireplace heat exchanger device

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Description

FIG. 1 is a perspective view of a fireplace heat exchanger device, showing our new design;

FIG. 2 is top plan view thereof;

FIG. 3 is front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof; and

FIG. 6 is a rear elevational view thereof.

Referenced Cited
U.S. Patent Documents
D245097 July 19, 1977 Boyd
3905351 September 1975 Hatfield et al.
4078542 March 14, 1978 Young et al.
Patent History
Patent number: D252041
Type: Grant
Filed: Aug 4, 1977
Date of Patent: Jun 5, 1979
Assignee: Energy Conserving Equipment, Inc. (Matthews, NC)
Inventors: Robert L. Williams (Matthews, NC), Frank M. Williams (Matthews, NC), J. Andrew Williams (Matthews, NC)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Catherine Kemper
Attorney: Channing L. Richards
Application Number: 5/821,780
Classifications
Current U.S. Class: D23/94; D/7207
International Classification: D2303; D0708;