Heat recovery unit

Description

FIG. 1 is a perspective view of the heat recovery unit embodying the design of the present invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is an opposite side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

Referenced Cited
U.S. Patent Documents
48540 July 1865 Edwards
D264500 May 18, 1982 Beaton
D287047 December 2, 1986 Nygren
3334400 August 1967 Jaeger
3913663 October 1975 Gates
4381819 May 3, 1983 Paolino
4437513 March 20, 1984 Castiglioni
4475530 October 9, 1984 Albertson
Patent History
Patent number: D349333
Type: Grant
Filed: Jul 8, 1991
Date of Patent: Aug 2, 1994
Inventor: Donald King (Chillicothe, OH)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Robin V. Taylor
Attorney: Terry M. Gernstein
Application Number: 7/726,521