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US3341925A - Method of making sheet metal heat exchangers with air centers - Google Patents

Method of making sheet metal heat exchangers with air centers Download PDF

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Publication number
US3341925A
US3341925A US290738A US29073863A US3341925A US 3341925 A US3341925 A US 3341925A US 290738 A US290738 A US 290738A US 29073863 A US29073863 A US 29073863A US 3341925 A US3341925 A US 3341925A
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ridges
wide portions
alternate
portions
wide
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US290738A
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George W Gerstung
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Motors Liquidation Co
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General Motors Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49366—Sheet joined to sheet

Definitions

  • This invention relates to methods of making heat exchangers and more particularly to methods of making integral units of air center type heat exchangers from sheet metal by a folding technique.
  • a heat exchanger using no air centers and a method of making such an exchanger is disclosed in the United States application Ser, No. 194,594 filed May 14, 1962, now Patent No. 3,258,832 in the name of George W. Gerstung.
  • the present application pertains to structures more suitable and capable of handling a greater amount of one fluid than of another in the heat interchange as in the case of automobile radiators through which air must pass in substantial volume as compared with the more limited volume of engine coolant.
  • An object of the present invention is to provide a high production method of making a sheet metal heat exchanger of low cost and lightweight construction and efiicient for the transfer of heat from one fluid to another in sitnations wherein one of the fluids, such as air, is usually not as dense or capable of storing heat as the other fluid.
  • FIGURE 1 is a plan view of part of a heat exchanger made in accordance with the present invention, portions in layers being broken away better to disclose the construction;
  • FIGURE 2 is a side view of the shown in FIGURE 1;
  • FIGURE 3 is an end view of a part of a sheet of metal divided into alternating sets of air center portions and confined fluid portions preparatory to the step of folding those portions into a stack as shown in FIGURES 1, 2 and
  • FIGURE 4 is an elevation view of the sheet, before fold'ng, and as shown in FIGURE 3;
  • FIGURE 5 is a cross-sectional view looking in the direction of the arrows 5-5 in FIGURE 1;
  • FIGURE 6 is an end view of the sheet shown in FIG- URES 3 and 4 being folded to form a stack.
  • a single sheet 10 of metal such as aluminum is formed into wide portions 12 and 14 by making slots 16 in narrow strips 18 separating the wide portions.
  • Small hinge portions 29 of metal formed from the narrow strips 18 are left thereby to retain the integrity of the sheet 10.
  • Ridges 22 are formed at an acute angle with the slots 16 in each of the portions 12.
  • Each portion 14 is provided with ridges 24 of a greater height extending preferably, but not necessarily, at the same angle as the ridges 22.
  • the ridges terminate at opposite parts of peripheral mar ins left in the fiat on each wide portion 14.
  • An opening 26 is formed in each end of each wide portion 12 and 14 with a defining raised flange 28 or 30 conforming with the ridges 22 or 24 as to height. It will be noted that all ridges and flanges extend from one side of the flat sheet 10. The product, being pressed from sheet metal, in presenting a ridge 22 or 24 on one of the sheets will provide a corresponding groove 22' or 2.4 on the other side.
  • ridges 22 extend entirely across each wide portion 12i.e.terminate at a slot Iii-but that the end ridges 22 stop short of the corresponding flange 28.
  • the sheet material 10 is preferably supplied with a coating on both sides which when subsequently heated in the stack assembly will bond or metal fuse together the peripheral margins and facing ridges and flanges.
  • Each header may constitute an inlet or an outlet for the liquid in the closed grooves 24' to be heated or cooled by air passing through the open-ended grooves 22'.
  • Commercially available aluminum brazing sheet may be used in making the stack into a unit but other materials may be employed in permanently joining the portions together. After the brazing operation, the hinge portions 20 may easily be removed. Obviously, only metal of the hinge portions 20 at the left side of FIGURE 6 need be removed to make the heat exchanger operative.
  • engine coolant If engine coolant is admitted to one header, it will flow through the confined passages defined by the closed grooves 24 of the wide portions 14 and be discharged from the other header. Air, in the meanwhile, may be forced by ram effect or otherwise through the open ended passage determined by the air center or ridges 22 defining the grooves 22 in the wide portions 12 of the stack. The strong agitation of or turbulence imparted to both the air and the engine coolant promotes a very effective heat exchange between the two fluids.
  • a method of making a heat exchanger having opposite sides for admitting and discharging a first fluid such as air comprising forming wide portions alternating with narrow strips along a length of sheet metal, the said forming including holding peripheral margins of alternate pairs of said wide portions in the flat and pressing the metal enclosed by said margins of said alternate pairs into ridges protruding from one side of said sheet and into ridges also on said one side and extending entirely across the other pairs of said wide portions, forming openings defined by peripheral flanges in each of said wide portions, folding and compressing said sheet with fold lines within said narrow strips into zigzag formation with the ridges and peripheral flange of each wide portion of an alternate pair into facing relation with the ridges and peripheral flange of the adjacent wide portion of said alternate pair, securing the peripheral flanges of each pair of alternate wide portions together, and said method including the removal of sheet metal from each of said narrow strips connecting the wide portions of an alternate pair to an adjacent wide portion to open the grooves formed by corresponding ridges.
  • a method of making a heat exchanger comprising forming a length of sheet metal into alternate pairs of Wide portions with adjacent Wide portions separated by narrow portions, said forming comprising making parallel ridges and grooves terminating at fiat margins for each of alternate sets of said wide portions and parallel ridges and grooves extending the full width of the other sets of said Wide portions, bending said length Within the limits of each narrow portion to form a zigzag construction, pressing and securing the flat margins of each pair of alternate wide portions together, and removing metal from one of said narrow portions connecting a pair of alternate wide portions to an adjacent pair of said other wide portions so that the latter may be effective as air centers.
  • a method of making a heat exchanger comprising forming a length of sheet metal into wide portions with adjacent Wide portions being separated by narrow portions, said forming comprising removing metal from said narrow portions to make openings through the sheet metal but leaving the length of sheet metal as an integral structure, said forming also including making ridges defining grooves in each of said wide portions with all ridges protruding from only one side of said sheet with the ridges in alternate pairs of said wide portions terminating short of the corresponding narrow portions to leave flat margins on said alternate pairs and with the ridges in the other pairs of said wide portions extending the full width of each of the latter, folding the remaining metal of said narrow portions so that said length of sheet material attains a zigzag arrangement, and pressing and securing the flat margins of each pair of alternate wide portions together and the apices of the ridges of each wide portion against the apices of an adjacent wide portion.
  • a method of making a heat exchanger as set forth in claim 3 wherein the step of securing comprises brazing said wide portions together to make a unitary structure defining separate paths for two fluids.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

p 1967 e. w. GERSTUNG 3,341,925
METHOD OF MAKING SHEET METAL HEAT EXCHANGERS WITH AIR CENTERS Filed June 26, 1965 r f: if 5 49% fla ATTORNEY United States Patent 3,341,925 METHGD OF MAKING SHEET METAL HEAT EX- (IHANGERS WITH AIR CENTERS George W. Ger-stung, Lockport, N.Y., assignor to General Motors Corporation, Detroit, Mich, a corporation of Deiaware Filed June 26, 1%3, Ser. No. 290,738 4 Claims. (Cl. 29157.3)
This invention relates to methods of making heat exchangers and more particularly to methods of making integral units of air center type heat exchangers from sheet metal by a folding technique.
A heat exchanger using no air centers and a method of making such an exchanger is disclosed in the United States application Ser, No. 194,594 filed May 14, 1962, now Patent No. 3,258,832 in the name of George W. Gerstung. The present application pertains to structures more suitable and capable of handling a greater amount of one fluid than of another in the heat interchange as in the case of automobile radiators through which air must pass in substantial volume as compared with the more limited volume of engine coolant.
An object of the present invention is to provide a high production method of making a sheet metal heat exchanger of low cost and lightweight construction and efiicient for the transfer of heat from one fluid to another in sitnations wherein one of the fluids, such as air, is usually not as dense or capable of storing heat as the other fluid.
The object and important features of the invention will now be described in detail in the specification and then pointed out more particularly in the appended claims.
In the drawings:
FIGURE 1 is a plan view of part of a heat exchanger made in accordance with the present invention, portions in layers being broken away better to disclose the construction;
FIGURE 2 is a side view of the shown in FIGURE 1;
FIGURE 3 is an end view of a part of a sheet of metal divided into alternating sets of air center portions and confined fluid portions preparatory to the step of folding those portions into a stack as shown in FIGURES 1, 2 and FIGURE 4 is an elevation view of the sheet, before fold'ng, and as shown in FIGURE 3;
FIGURE 5 is a cross-sectional view looking in the direction of the arrows 5-5 in FIGURE 1;
FIGURE 6 is an end view of the sheet shown in FIG- URES 3 and 4 being folded to form a stack.
In making the heat exchanger, a single sheet 10 of metal such as aluminum is formed into wide portions 12 and 14 by making slots 16 in narrow strips 18 separating the wide portions. There are two wide portions 12 alternating with sets of two wide portions 14 as indicated in FIGURE 4. Small hinge portions 29 of metal formed from the narrow strips 18 are left thereby to retain the integrity of the sheet 10. Ridges 22 are formed at an acute angle with the slots 16 in each of the portions 12. Each portion 14 is provided with ridges 24 of a greater height extending preferably, but not necessarily, at the same angle as the ridges 22. The ridges terminate at opposite parts of peripheral mar ins left in the fiat on each wide portion 14. An opening 26 is formed in each end of each wide portion 12 and 14 with a defining raised flange 28 or 30 conforming with the ridges 22 or 24 as to height. It will be noted that all ridges and flanges extend from one side of the flat sheet 10. The product, being pressed from sheet metal, in presenting a ridge 22 or 24 on one of the sheets will provide a corresponding groove 22' or 2.4 on the other side.
part of an exchanger The sheet is then folded into a zigzag formation as indicated by the arrows in FIGURE 3 and the partially completed stack of FIGURE 6-, the fold lines being confined to the narrow strips 18 or hinge portions 20 and with the open ended grooves 22' of adjacent wide portions 12 in facing relation and with the closed grooves 24' of adjacent wide portions 14 in facing relation. This places the series of flanges 28 and 30 in such relation that a continuous header is formed at each end of the stack. In making the stack, the peripheral margin of a portion 14 is forced into contact with the peripheral margin of the adjacent portion 14 so that closed end grooves 24' of the two portions communicate and connect with the openings 26. It will be noted that the ridges 22 extend entirely across each wide portion 12i.e.terminate at a slot Iii-but that the end ridges 22 stop short of the corresponding flange 28. Ridges 24, on the other hand, terminate short of the edges of each wide portion 14 or the slots 16 and the end ridges 24 join the corresponding flange 30. Because of this arrangement, all closed grooves 24 are in communication with the headers and all grooves 22' are cut off from them but open at their ends to the atmosphere. 7
The sheet material 10 is preferably supplied with a coating on both sides which when subsequently heated in the stack assembly will bond or metal fuse together the peripheral margins and facing ridges and flanges. Each header may constitute an inlet or an outlet for the liquid in the closed grooves 24' to be heated or cooled by air passing through the open-ended grooves 22'. Commercially available aluminum brazing sheet may be used in making the stack into a unit but other materials may be employed in permanently joining the portions together. After the brazing operation, the hinge portions 20 may easily be removed. Obviously, only metal of the hinge portions 20 at the left side of FIGURE 6 need be removed to make the heat exchanger operative.
If engine coolant is admitted to one header, it will flow through the confined passages defined by the closed grooves 24 of the wide portions 14 and be discharged from the other header. Air, in the meanwhile, may be forced by ram effect or otherwise through the open ended passage determined by the air center or ridges 22 defining the grooves 22 in the wide portions 12 of the stack. The strong agitation of or turbulence imparted to both the air and the engine coolant promotes a very effective heat exchange between the two fluids.
I claim:
1. A method of making a heat exchanger having opposite sides for admitting and discharging a first fluid such as air, said method comprising forming wide portions alternating with narrow strips along a length of sheet metal, the said forming including holding peripheral margins of alternate pairs of said wide portions in the flat and pressing the metal enclosed by said margins of said alternate pairs into ridges protruding from one side of said sheet and into ridges also on said one side and extending entirely across the other pairs of said wide portions, forming openings defined by peripheral flanges in each of said wide portions, folding and compressing said sheet with fold lines within said narrow strips into zigzag formation with the ridges and peripheral flange of each wide portion of an alternate pair into facing relation with the ridges and peripheral flange of the adjacent wide portion of said alternate pair, securing the peripheral flanges of each pair of alternate wide portions together, and said method including the removal of sheet metal from each of said narrow strips connecting the wide portions of an alternate pair to an adjacent wide portion to open the grooves formed by corresponding ridges.
2. A method of making a heat exchanger comprising forming a length of sheet metal into alternate pairs of Wide portions with adjacent Wide portions separated by narrow portions, said forming comprising making parallel ridges and grooves terminating at fiat margins for each of alternate sets of said wide portions and parallel ridges and grooves extending the full width of the other sets of said Wide portions, bending said length Within the limits of each narrow portion to form a zigzag construction, pressing and securing the flat margins of each pair of alternate wide portions together, and removing metal from one of said narrow portions connecting a pair of alternate wide portions to an adjacent pair of said other wide portions so that the latter may be effective as air centers.
3. A method of making a heat exchanger comprising forming a length of sheet metal into wide portions with adjacent Wide portions being separated by narrow portions, said forming comprising removing metal from said narrow portions to make openings through the sheet metal but leaving the length of sheet metal as an integral structure, said forming also including making ridges defining grooves in each of said wide portions with all ridges protruding from only one side of said sheet with the ridges in alternate pairs of said wide portions terminating short of the corresponding narrow portions to leave flat margins on said alternate pairs and with the ridges in the other pairs of said wide portions extending the full width of each of the latter, folding the remaining metal of said narrow portions so that said length of sheet material attains a zigzag arrangement, and pressing and securing the flat margins of each pair of alternate wide portions together and the apices of the ridges of each wide portion against the apices of an adjacent wide portion.
4. A method of making a heat exchanger as set forth in claim 3 wherein the step of securing comprises brazing said wide portions together to make a unitary structure defining separate paths for two fluids.
References Cited UNITED STATES PATENTS CHARLIE T. MOON, Primary Examiner.
CHARLES SUKALO, Examiner.
JAMES D. HOBART, S. W. MILLARD,
Assistant Examinens.

Claims (1)

1. A METHOD OF MAKING A HEAT EXCHANGER HAVING OPPOSITE SIDES FOR ADMITTING AND DICHARGING A FIRST FLUID SUCH AS AIR, SAID METHOD COMPRISING FORMING WIDE PORTIONS ALTERNATING WITH NARROW STRIPS ALONG A LENGTH OF SHEET METAL, THE SAID FORMING INCLUDING HOLDING PERIPHERAL MARGINS OF ALTERNATE PAIRS OF SAID WIDE PORTIONS IN THE FLAT AND PRESSING THE METAL ENCLOSED BY SAID MARGINS OF SAID ALTERNATE PAIRS INTO RIDGES PROTRUDING FROM ONE SIDE OF SAID SHEET AND INTO RIDGES ALSO ON SAID ONE SIDE AND EXTENDING ENTIRELY ACROSS THE OTHER PAIRS OF SAID WIDE PORTIONS, FORMING OPENINGS DEFINED BY PERIPHERAL FLANGES IN EACH OF SAID WIDE PORTIONS, FOLDING AND COMPRESSING SAID SHEET WITH FOLD LINES WITHIN SAID NARROW STRIPS INTO ZIGZAG FORMATION WITH THE RIDGES AND PERIPHERAL FLANGE OF EACH WIDE PORTION OF AN ALTERNATE PAIR INTO FACING RELATION WITH THE RIDGES AND PERIPHERAL FLANGE OF THE ADJACENT WIDE PORTION OF SAID ALTERNATE PAIR, SECURING THE PERIPHERAL FLANGES OF EACH PAIR OF ALTERNATE WIDE PORTIONS TOGETHER, AND SAID METHOD INCLUDING THE REMOVAL OF SHEET METAL FROM EACH OF SAID NARROW STRIPS CONNECTING THE WIDE PORTIONS OF THE ALTERNATE PAIR TO AN ADJACENT WIDE PORTION TO OPEN THE GROOVES FROMED BY CORRESPONDING RIDGES.
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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451474A (en) * 1967-07-19 1969-06-24 Gen Motors Corp Corrugated plate type heat exchanger
US3508607A (en) * 1967-04-19 1970-04-28 Motoren Turbinen Union Heat exchanger
US3525138A (en) * 1968-04-09 1970-08-25 Gen Electric Method of making a humidifier evaporating element
US3545062A (en) * 1967-07-19 1970-12-08 Gen Motors Corp Method of fabricating a heat exchanger from corrugated sheets
US4011905A (en) * 1975-12-18 1977-03-15 Borg-Warner Corporation Heat exchangers with integral surge tanks
US4373243A (en) * 1977-04-23 1983-02-15 Sumitomo Precision Products Co. Ltd. Method of forming reinforced plate-type heat exchanger
US5050671A (en) * 1989-05-12 1991-09-24 Du Pont Canada Inc. Panel heat exchangers formed from thermoplastic polymers
US5193611A (en) * 1989-05-04 1993-03-16 The Secretary Of State For Trade And Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Heat exchangers
US5507338A (en) * 1995-08-30 1996-04-16 Ford Motor Company Tab for an automotive heat exchanger
US5603159A (en) * 1994-09-29 1997-02-18 Zexel Corporation Method of producing heat exchangers
US5692559A (en) * 1995-05-29 1997-12-02 Long Manufacturing Ltd. Plate heat exchanger with improved undulating passageway
US5855240A (en) * 1998-06-03 1999-01-05 Ford Motor Company Automotive heat exchanger
FR2789755A1 (en) * 1999-02-11 2000-08-18 Valeo Climatisation Heat exchanger for car has metallic tape stamped to form indentations defining two semi-channels put together to create complete U-shaped channel
US6167952B1 (en) 1998-03-03 2001-01-02 Hamilton Sundstrand Corporation Cooling apparatus and method of assembling same
US6209202B1 (en) 1999-08-02 2001-04-03 Visteon Global Technologies, Inc. Folded tube for a heat exchanger and method of making same
US6360817B1 (en) * 1999-12-22 2002-03-26 Visteon Global Technologies, Inc. Single heat exchanger
US20030131979A1 (en) * 2001-12-19 2003-07-17 Kim Hyeong-Ki Oil cooler
US20030188855A1 (en) * 2000-09-29 2003-10-09 Calsonic Kansei Corporation Heat exchanger
US20060237180A1 (en) * 2005-04-19 2006-10-26 Norman Anke Air heat exchanger
US20070034362A1 (en) * 2005-08-11 2007-02-15 Kern Robert D Heat exchanger

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US574157A (en) * 1896-12-29 ljtjngstrom
US2912749A (en) * 1956-01-13 1959-11-17 Modine Mfg Co Method of making a heat exchanger
CA588426A (en) * 1959-12-08 W. Gerstung George Heat exchanger
US2927369A (en) * 1954-10-21 1960-03-08 Gen Motors Corp Method of making multiple passage heat exchanger
US2952444A (en) * 1956-03-08 1960-09-13 Rosenblads Patenter Ab Heat exchangers of the plate type
US2977918A (en) * 1957-07-05 1961-04-04 Richard W Kritzer Method of making heat transfer units
US3017161A (en) * 1959-01-12 1962-01-16 Modine Mfg Co Heat exchanger
US3211118A (en) * 1962-12-20 1965-10-12 Borg Warner Heat exchanger
US3223153A (en) * 1962-05-21 1965-12-14 Modine Mfg Co Fin and tube type heat exchanger

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US574157A (en) * 1896-12-29 ljtjngstrom
CA588426A (en) * 1959-12-08 W. Gerstung George Heat exchanger
US2927369A (en) * 1954-10-21 1960-03-08 Gen Motors Corp Method of making multiple passage heat exchanger
US2912749A (en) * 1956-01-13 1959-11-17 Modine Mfg Co Method of making a heat exchanger
US2952444A (en) * 1956-03-08 1960-09-13 Rosenblads Patenter Ab Heat exchangers of the plate type
US2977918A (en) * 1957-07-05 1961-04-04 Richard W Kritzer Method of making heat transfer units
US3017161A (en) * 1959-01-12 1962-01-16 Modine Mfg Co Heat exchanger
US3223153A (en) * 1962-05-21 1965-12-14 Modine Mfg Co Fin and tube type heat exchanger
US3211118A (en) * 1962-12-20 1965-10-12 Borg Warner Heat exchanger

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3508607A (en) * 1967-04-19 1970-04-28 Motoren Turbinen Union Heat exchanger
US3545062A (en) * 1967-07-19 1970-12-08 Gen Motors Corp Method of fabricating a heat exchanger from corrugated sheets
US3451474A (en) * 1967-07-19 1969-06-24 Gen Motors Corp Corrugated plate type heat exchanger
US3525138A (en) * 1968-04-09 1970-08-25 Gen Electric Method of making a humidifier evaporating element
US4011905A (en) * 1975-12-18 1977-03-15 Borg-Warner Corporation Heat exchangers with integral surge tanks
US4373243A (en) * 1977-04-23 1983-02-15 Sumitomo Precision Products Co. Ltd. Method of forming reinforced plate-type heat exchanger
US5193611A (en) * 1989-05-04 1993-03-16 The Secretary Of State For Trade And Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Heat exchangers
US5050671A (en) * 1989-05-12 1991-09-24 Du Pont Canada Inc. Panel heat exchangers formed from thermoplastic polymers
US5603159A (en) * 1994-09-29 1997-02-18 Zexel Corporation Method of producing heat exchangers
US5692559A (en) * 1995-05-29 1997-12-02 Long Manufacturing Ltd. Plate heat exchanger with improved undulating passageway
US5507338A (en) * 1995-08-30 1996-04-16 Ford Motor Company Tab for an automotive heat exchanger
US6167952B1 (en) 1998-03-03 2001-01-02 Hamilton Sundstrand Corporation Cooling apparatus and method of assembling same
US5855240A (en) * 1998-06-03 1999-01-05 Ford Motor Company Automotive heat exchanger
EP0962735A3 (en) * 1998-06-03 2000-03-01 Ford Motor Company Automotive heat exchanger
FR2789755A1 (en) * 1999-02-11 2000-08-18 Valeo Climatisation Heat exchanger for car has metallic tape stamped to form indentations defining two semi-channels put together to create complete U-shaped channel
US6209202B1 (en) 1999-08-02 2001-04-03 Visteon Global Technologies, Inc. Folded tube for a heat exchanger and method of making same
US6360817B1 (en) * 1999-12-22 2002-03-26 Visteon Global Technologies, Inc. Single heat exchanger
US6732790B2 (en) 1999-12-22 2004-05-11 Visteon Global Technologies, Inc. Single heat exchanger
US20030188855A1 (en) * 2000-09-29 2003-10-09 Calsonic Kansei Corporation Heat exchanger
US20030131979A1 (en) * 2001-12-19 2003-07-17 Kim Hyeong-Ki Oil cooler
US20060237180A1 (en) * 2005-04-19 2006-10-26 Norman Anke Air heat exchanger
US20070034362A1 (en) * 2005-08-11 2007-02-15 Kern Robert D Heat exchanger
US7311139B2 (en) 2005-08-11 2007-12-25 Generac Power Systems, Inc. Heat exchanger

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