Title:
Fireplace heat exchanger
United States Patent D273323
Inventors:
Davidson, Keith J. (Dorchester, CA)
Application Number:
D/290834
Publication Date:
04/03/1984
Filing Date:
08/07/1981
Export Citation:
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Assignee:
432698 Ontario Ltd. (Dorchester, CA)
Primary Class:
D23/398
Other Classes:
D23/405
Field of Search:
D23/94-96, D23/127, D23/135, D23/136, D23/138.2, D23/138.4, 126/120, 126/121, 126/163, 126/164, 126/165, 126/298
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US Patent References:
4271814Heat extracting apparatus for fireplacesJune, 1981Lister126/121
4170217Andirons having rear end locking meansOctober, 1979Mayes126/121
D253067Fireplace heat exchangerOctober, 1979HartleyD23/138.2
4010729Fireplace furnaceMarch, 1977Egli126/121
Foreign References:
CA47387October, 1980
Primary Examiner:
Kemper, Catherine E.
Claims:
1. The ornamental design for a fireplace heat exchanger, as shown anddescribed.

Description:

FIG. 1 is a front elevational view of a fireplace heat exchanger, showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a perspective view thereof.