Heat exchanger
United States Patent D728087

Zan, Ivan (Monroe Township, NJ, US)
Andreyko, Pavlyna I. (Monroe Township, NJ, US)
Application Number:
Publication Date:
Filing Date:
Primary Class:
International Classes:
(IPC1-7): 2303
Field of Search:
D15/5, D23/314, D23/343, D23/323, 126/92AC, 126/92B, 126/91R, 126/200, 165/499, 165/450, 165/152, 165/182, 165/176, 165/165, 165/557
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US Patent References:
D547847Heating deviceJuly, 2007SmalD23/330
6637378Heater core preheaterOctober, 2003Al-Amin122/28
D386561Heat exchangerNovember, 1997CampbellD23/330
D369402Inline water heaterApril, 1996KrishartD23/318
5443053Fuel heaterAugust, 1995Johnson
D335338Heat exchanger housingMay, 1993SheroD23/323
5118451Fuel vaporization deviceJune, 1992Lambert et al.261/144
D315597Propane fired heater for defrosting frozen pipes or the likeMarch, 1991Botheras et al.D23/332
4645600In-tank fuel filterFebruary, 1987Filippi210/416.4
4403590Engine fuel consumption reduction systemSeptember, 1983Davis123/557
D267035Wood burning stoveNovember, 1982JinskyD23/343
4180036Fuel temperature controlDecember, 1979Wolf
D252526FurnaceJuly, 1979DeNyseD23/329
3989019Fuel heating apparatusNovember, 1976Brandt et al.
3625190FUEL VAPORIZERDecember, 1971Boissevain
0567034N/ASeptember, 1896Loy126/61

Primary Examiner:
Nelson, Chase T.
Assistant Examiner:
Aman, Ania
Attorney, Agent or Firm:
Martin, Paul R.

1. The ornamental design for a heat exchanger, as shown and described.


FIG. 1 is perspective view of the heat exchanger of our new design.

FIG. 2 is an elevational view of the front thereof.

FIG. 3 is an elevational view of the back thereof.

FIG. 4 is a top plan view.

FIG. 5 is an elevational view of the right end thereof, as shown in FIG. 4.

FIG. 6 is an elevational view of the left end thereof, as shown in FIG. 4.

FIG. 7 is an bottom plan view thereof.

FIG. 8 is a cross sectional view through line 8-8 of FIG. 2; and,

FIG. 9 is a cross sectional view through line 9-9 of FIG. 2.

The broken line elements shown in FIG. 8 are environmental elements and form no part of the my new design.