Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUSD330248 S
Publication typeGrant
Application numberUS 07/557,486
Publication dateOct 13, 1992
Filing dateJul 23, 1990
Publication number07557486, 557486, US D330248 S, US D330248S, US-S-D330248, USD330248 S, USD330248S
InventorsCatherine J. Chagnot, Craig J. Kinzelman, Noshir D. Colah, Harry Dewar
Original AssigneeStirling Technology, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Air to air heat exchanger
US D330248 S
Abstract  available in
Previous page
Next page
  1. The ornamental design for an air to air heat exchanger, as shown and described.

FIG. 1 is a front and right side perspective view of an air to air heat exchanger showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a front and right side perspective view thereof on a reduced scale, shown in use, the broken line showing of environmental structure is for illustrative purposes only and forms no part of the claimed design.

Non-Patent Citations
1Electrical Merchandising week, Sep., 1960, pp. 42-43.
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US8151568Oct 13, 2009Apr 10, 2012Infinia CorporationStirling engine systems, apparatus and methods
US8256497Jan 29, 2010Sep 4, 2012John GietzenThermal energy exchanger
US8559197Dec 9, 2009Oct 15, 2013Infinia CorporationElectrical control circuits for an energy converting apparatus
US8869529Mar 16, 2012Oct 28, 2014Qnergy IncStirling engine systems, apparatus and methods
US20100180595 *Oct 13, 2009Jul 22, 2010Paul FraserStirling engine systems, apparatus and methods
US20100182809 *Dec 9, 2009Jul 22, 2010Matthew John CullinaneApparatus, Systems, and Methods for Controlling Energy Converting Devices
US20100186927 *Jan 29, 2010Jul 29, 2010John GietzenThermal energy exchanger
U.S. ClassificationD23/330, D23/353