Fireplace heat exchange tubing device

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Description

FIG. 1 is a perspective view of a fireplace heat exchange tubing device showing my new design;

FIG. 2 is a plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is an end elevational view thereof; and

FIG. 5 is an elevational view of the opposite end thereof.

The broken line disclosure of an air inlet fan and grille and an outlet grille in FIG. 1 is for illustrative purposes only and forms no part of the claimed design.

Referenced Cited
U.S. Patent Documents
4060196 November 29, 1977 Goldsby et al.
4102320 July 25, 1978 Mastropole
4103670 August 1, 1978 Bergs
4112914 September 12, 1978 Brown
Patent History
Patent number: D253719
Type: Grant
Filed: Jul 25, 1977
Date of Patent: Dec 18, 1979
Inventor: Ronald C. DiDonato (Lakewood, CO)
Primary Examiner: Susan J. Lucas
Assistant Examiner: Catherine Kemper
Attorney: W. Britton Moore
Application Number: 5/818,822
Classifications
Current U.S. Class: D23/136; D23/127
International Classification: D2303;