Heat recovery apparatus

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Description

FIG. 1 is a top plan view showing heater exhaust ports wherein air passes horizontally thru the heat recovery apparatus, wherein the top and bottom view are identical;

FIG. 2 is a front side elevational view thereof showing the vertical heat recovery ports, wherein both front and back side are identical;

FIG. 3 is a side elevational view taken from FIG. 1, wherein each side view is identical; and,

FIG. 4 is a perspective view thereof.

The heat recovery apparatus is installed in any heating unit exhaust duct and is designed to safely recover and utilize wasted heat.

Claims

The ornamental design for a heat recovery apparatus, as shown and described.

Referenced Cited
U.S. Patent Documents
D298458 November 8, 1988 Margolin et al.
5579827 December 3, 1996 Chung
5708564 January 13, 1998 Lin
5825622 October 20, 1998 Rife et al.
6459580 October 1, 2002 Della Fiora et al.
D592614 May 19, 2009 Plonski et al.
7684187 March 23, 2010 Meyer et al.
D616381 May 25, 2010 Chang et al.
20050225938 October 13, 2005 Montgomery et al.
20090321058 December 31, 2009 Uchimura et al.
Patent History
Patent number: D643379
Type: Grant
Filed: Mar 1, 2010
Date of Patent: Aug 16, 2011
Inventor: Loyd Bolin (Tulsa, OK)
Primary Examiner: Selina Sikder
Application Number: 29/348,980
Classifications
Current U.S. Class: Heat Sink (D13/179)