US3419069A - Heat transfer apparatus having flexible plastic tubular elements arranged in a braided configuration - Google Patents

Heat transfer apparatus having flexible plastic tubular elements arranged in a braided configuration Download PDF

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Publication number
US3419069A
US3419069A US634631A US63463167A US3419069A US 3419069 A US3419069 A US 3419069A US 634631 A US634631 A US 634631A US 63463167 A US63463167 A US 63463167A US 3419069 A US3419069 A US 3419069A
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United States
Prior art keywords
tubular elements
bundle
elements
fluid
heat transfer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US634631A
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English (en)
Inventor
Baker Thomas Bernard
Levy Stanley Burton
Ottolini Roland Frederick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ametek Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US634631A priority Critical patent/US3419069A/en
Priority to GB19714/68A priority patent/GB1199590A/en
Priority to FR1583962D priority patent/FR1583962A/fr
Application granted granted Critical
Publication of US3419069A publication Critical patent/US3419069A/en
Anticipated expiration legal-status Critical
Assigned to AMETEK, INC., A CORP. OF DE. reassignment AMETEK, INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: E.I. DU PONT DE NEMOURS AND COMPANY
Expired - Lifetime legal-status Critical Current

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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
    • F28D1/0206—Heat exchangers immersed in a large body of liquid
    • F28D1/0213—Heat exchangers immersed in a large body of liquid for heating or cooling a liquid in a tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/062—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2210/00—Heat exchange conduits
    • F28F2210/10—Particular layout, e.g. for uniform temperature distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/02—Flexible elements

Definitions

  • a heat transfer apparatus having a casing member surrounding at least one bundle of flexible plastic tubular elements, a substantial portion of each bundle comprising a first group of tubular elements arranged in a given pattern and interlaced in a substantially uniform manner with a second group of tubular elements arranged in symmetrically opposed pattern to provide a coherent flexible bundle, stable in size, and having a predetermined degree of packing and predetermined resistance to fluid flow through said bundle exteriorly of said elements which predetermined characteristics cooperate to provide a good heat transfer characteristics for the apparatus.
  • This invention relates generally to improved heat exchange, or heat transfer, apparatus; and more specifically to heat exchange apparatus having flexible plastic tubular elements in a particularly advantageous bundle arrangement.
  • 3,277,959 involves the use of interleaved tape elements spaced along a bundle of plastic tubular elements and bonded thereto.
  • the tape elements position the tubular elements, maintain them in a fairly compact bundle, and control, to some extent, fluid flow conditions exteriorly of the tubular elements in the bundle.
  • a third feature of this type as disclosed in prior copending application Ser. No. 598,070, filed Nov. 30, 1966 in the name of Robert Dilman Smith involves placing a bundle of plastic tubular elements in a foraminous casing member or sleeve to maintain a compact bundle configuration and desired fluid flow conditions in the bundle exteriorly of said elements.
  • the spaced tape elements bonded to the tubular elements prevent bending of the bundles during production, and use and will break loose or damage the tubular elements if excessive bending forces are encountered.
  • the tapes do not prevent the squeezing together and spreading apart of the flexible tubular elements between the spaced tape elements which has an adverse effect on fluid flow conditions and on the tubular elements.
  • the flexibility of the plastic tubular elements is used to provide a bundle of uniformly interlaced tubular elements which, without any additional structure or means, results in a coherent compact bundle in which uniform packing, resistance to flow, and spacing of the tubular elements are maintained uniformly along the bundle.
  • the bundle is flexible and rugged as required in assembly and operation of the heat exchange apparatus, and also accommodate thermal expansion of the elements in a more uniform and controlled manner.
  • bundles are provided in the preferred form of sleeve-like configurations it is possible without difficulty to assemble a number of sleeve-like bundles one inside the other and, if desired, to provide additional support and/or fluid flow for the bundle by positioning a substantially rigid support or a sparger member within the bundle as will be described in detail hereinafter.
  • FIGURE 1 is a partial isometric view of a preferred heat transfer arrangement embodying features of the invention with certain parts broken away to show the relationship of the component parts and features.
  • FIGURE 2 is a side elevational view, with certain parts broken away for a clearer showing, of a somewhat different heat transfer arrangement embodying features of the invention.
  • FIGURE 3 is an enlarged end view of the sparger and support member of the arrangement of FIGURE 2.
  • FIGURE 4 is a partial side elevational view of a bundle of tubular elements with the cooperating tube sheet member and a rigid support and sparger member associated therewith. The interlaced arrangement of the flexible tubular elements embodying the present inven tion is also shown in this figure.
  • FIGURE 5 is a partial enlarged detailed view of the preferred interlaced flexible tubular element arrangement of the invention, showing how the important angle of tubular element cross over or intersection is measured.
  • FIGURE 6 is a partial transverse cross sectional view of the arrangement of FIGURE 4 taken at line 66.
  • FIGURE 7 is a partial longitudinal cross sectional view of the sparger and support member of FIGURE 3.
  • FIGURE 8 is an enlarged partial side elevational view Of a heat exchange arrangement embodying features of the invention and similar to that of FIGURE 4, showing a modified arrangement in the tubular elements are interlaced With each other in groups of four.
  • FIGURES l, 4, 5 and 6 One preferred heat exchange arrangement or combina: tion embodying principles of this invention is shown in FIGURES l, 4, 5 and 6.
  • the apparatus shown in these figures comprises a casing member 10 formed by wall elements 11 of suitable material which define a chamber for a fluid the upper surface of which is indicated at 14.
  • the casing member is provided with fluid inlet means 12 and fluid outlet means 13.
  • An elongated compact bundle of a relatively large number of small thin-walled flexible plastic tubular elements T is positioned as shown to extend through at least a portion of a fluid in the chamber defined by wall elements 11.
  • Each end of the bundle 20 is provided with a header unit 21 which maintains free communication between the interiors of the tubular elements T and fluid supply conduit elements 23, 24, 25.
  • Suitable header unit arrangements are shown for example in U.S.
  • the tubular elements T of which there may be from about 500 to about 10,000 or more, may be formed of a composition, and in sizes, disclosed in the abovemen-tioned U.S. Patent No. 3,228,456.
  • the composition preferred is a polyfluorinated plastic such as a copolymer of tetrafluoroethylene and hexafluoropropylene with a thermal conductivity of about 0.1 B.t.u./hr./ft./F.
  • the tubular elements in the bundle are preferably in a size range between about 5 and 275 mils outside diameter with a wall thickness between about 0.5 and about 30.0 mils on centerlines spaced in an average of about 1.01- 2.00 diameters.
  • each sleeve comprises a first plurality of tubular elements positioned in a first helical pattern and an interengaged interlaced second plurality of tubular elements positioned in a second opposing helical pattern.
  • FIGURE 8 Another variation of an interlaced bundle is shown in FIGURE 8 in which the tubular elements are interlaced in the same general manner except that they are handled in groups of four elements. If the tubular elements are interwoven or braided together too tightly, a closed pattern with prohibitive resistance to fluid flow, unacceptable susceptability to plugging, and undesirable kinking of individual tubular elements is formed.
  • tubular elements are interwoven or braided together too loosely, the bundle loses its desired coherence and compactness; also, the position of the elements relative to each other to maintain a desired uniform packing packing and resistance to fluid flow through the bundle cannot be established or maintained. It has been determined that a controlling factor is the .angle of intersection formed where tubular elements of one plurality cross over the elements of the other plurality. For tubular elements in the size ranges discussed above, and particularly for tubular elements of about mils outside diameter, this angle is preferably maintained between about 10 and about 60. The measurement of this angle is shown in FIGURE 5 at angle ABC or 0.
  • interwoven bundles or sleeves are suitably accomplished on conventional well-known brading machinery with a few minor modifications obviously necessary to adapt them from small solid wires or yarns to the small hollow tubular elements utilized in the apparatus of this invention.
  • brading machinery with a few minor modifications obviously necessary to adapt them from small solid wires or yarns to the small hollow tubular elements utilized in the apparatus of this invention.
  • One example of a satisfactory arrangement generally suitable for forming the interlaced bundles of this invention is disclosed in Catalog 56 (ELF-20004-1M-l164) on Braiders of the New England Butt Co., 304 Pearl Street, Buffalo, R.I.
  • braided or interlaced bundles are formed with end portions in which the tubular elements are substantially parallel (not interlaced) to facilitate construction of the tube sheet TS (FIGURE 4) or end construction suitable for forming the necessary header arrangement of a heat exchange apparatus (such as disclosed in abovementioned U.S. Patents 3,228,456 and 3,277,959).
  • This is accomplished by periodically ceasing the braiding or interlacing action as a long length of bundles of tubular elements is being produced.
  • the configuration and/ or position of the bundle of tubular elements as a Whole can be controlled or maintained by the use of a rigid unit inserted within the bundle.
  • This unit may, if desired, be hollow and provided with suitable orifices 33 so fluid can be circulated through the unit into the bundle to improve fluid circulation and distribution within the bundle.
  • the unit 32 in a U-shaped configuration within the bundle maintains the bundle configuration and position.
  • Unit 32 is connected to conduit elbow elements 31 and to other conduits elements 30 and 33 through which fluid is supplied into the bundle interior as shown.
  • the tube bundle 20 and rigid supporting unit 32 are held in position relative to each other and relative to the wall elements 1 1 of the housing by means of a bracket assembly comprising elements 40, 42, and 43, all held in place by bolts 44 and 41.
  • the rigid unit controlling the position of the bundle and improving fluid circulation comprises a hollow radial portion 310 and a hollow axial portion 312 having perforations or orifices 313.
  • a fluid at one temperature is passed through the housing by means of inlet 12 and outlet 13, while a suitable fluid at a significantly different temperature is passed through the tubular elements T of bundle by means of conduit elements 23, 24, and header units 21 to cause transfer of heat between the two fluids.
  • a portion of the fluid at said one temperature may be circulated through the hollow rigid unit 32 and out of orifices 33 by means of supply conduit elements 33 and 30.
  • FIGURE 2 A modified version of heat transfer apparatus embodying principles of the invention is shown in FIGURE 2.
  • This version corresponds to a tube-in-shell heat exchanger arrangement similar to that shown in the above mentioned US. Patent No. 3,228,456.
  • braided or interlaced bundle of tubular elements similar to that shown in FIGURE 4 has been positioned in a shell or casing member 101 which is provided with inlet 105, outlet 106, and suitable header units 102 at each end thereof to permit circulation of fluid fro-m inlet 103 through the interiors of the tubular elements to the outlet 104.
  • suitable header constructions are disclosed in the above-mentioned US. Patents 3,228,456 and 3,277,- 959.
  • a rigid unit 401 can be mounted in cooperation with shell inlet 105 as shown in FIGURE 2 and in engagement with the bundle of tubular elements to help maintain the position of the bundle and improve the handling of fluid supplied into the bundle as shown, by means of openings 403 and 404- in hollow unit 401.
  • the enlarged showings of FIGURES 3 and 7 make the structure and function of this unit clear.
  • Unit 401 functions as shown in the preferred version of FIGURE 2 to receive a portion of the inlet stream to the shell in its hollow portion, and conduct this portion of the inlet stream directly into the central portion of the tube bundle where it is distributed through openings 403.
  • the other portion of the shell inlet stream passes through openings 404 directly into the shell outside of the hollow portion of unit 401.
  • FIGURE 7 The direction of shell inlet flow is generally indicated by the arrows in FIGURE 7.
  • the op eration of the FIGURE 2 version of the apparatus of the invention is believed to be apparent from the drawing; one fluid at a given temperature being passed within the casing member or shell 101 exteriorly of the tubular elements from inlet 105 to outlet 106 while a fluid at a different temperature is passed from header inlet 103 through the interiors of the tubular elements T to header outlet 104.
  • this invention provides a simplified arrangement in which the flexible tubular elements themselves act as spacing means to maintain the position of the elements relative to each other along the bundle, and establish a substantially uniform packing and resistance to fluid flow necessary for good heat exchange relation ships.
  • the invention provides a compact bundle which is also flexible and widely manipulatable in assembly, operation, and maintenance while preserving generally the important relationships of the tubular elements relative to each other.
  • the new arrangement of this invention results in a heat exchanger apparatus which is less susceptible to plugging of shellside fluid flow, less susceptible to tubular element kinking or damage, and also inherently possesses better and more uniform heat transfer characteristics.
  • An improved heat exchanger apparatus comprising in combination: a casing member, said casing member provided with structure defining a fluid-containing chamber, said apparatus further comprising a bundle of small diameter, thin-walled, flexible, tubular elements having continuously hollow interiors and formed of an organic polymeric composition, said bundle extending through at least a portion of said chamber to cooperate with a fluid contained in said chamber, said apparatus further comprising supporting means cooperating with said bundle to support said bundle in said chamber, conduit means operatively connected with the interiors of said tubular elements to circulate a fluid therethrough and establish a heat transfer relationship with a fluid in said chamber, said bundle having at least a substantial portion thereof comprising a first plurality of tubular elements arranged in a given pattern, and a second plurality of tubular elements arranged in a similar opposed pattern, said elements of each plurality being interlaced in a substantially uniform manner to provide a coherent flexible bundle substantially stable in size, the extent of interlacing and number of tubular elements being such that a predetermined degree of packing and a predetermined
  • the said supporting means comprises a substantially rigid reinforcing unit extending through said bundle and interengaged with said tubular elements to maintain the position of said bundle within desired limits in said chamber.
  • said supporting means comprises an elongated substantially rigid unit projecting into and extending along within the innermost sleeve arrangement for a substantial portion of the length of the bundle in order to positively maintain the position and configuration of the bundle Within desired limits, said unit comprising a fluid passageway therethrough and orifices connected therewith for handling fluid supplied into said bundle exteriorly of said tubular elements.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US634631A 1967-04-28 1967-04-28 Heat transfer apparatus having flexible plastic tubular elements arranged in a braided configuration Expired - Lifetime US3419069A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US634631A US3419069A (en) 1967-04-28 1967-04-28 Heat transfer apparatus having flexible plastic tubular elements arranged in a braided configuration
GB19714/68A GB1199590A (en) 1967-04-28 1968-04-25 Tubular Heat Exchanger
FR1583962D FR1583962A (enExample) 1967-04-28 1968-04-26

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US634631A US3419069A (en) 1967-04-28 1967-04-28 Heat transfer apparatus having flexible plastic tubular elements arranged in a braided configuration

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FR (1) FR1583962A (enExample)
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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2010138A1 (enExample) * 1968-06-04 1970-02-13 Du Pont
US3529664A (en) * 1969-04-23 1970-09-22 Du Pont End structure for thermoplastic tubing
DE2126248A1 (de) * 1970-05-26 1971-12-02 E.I. du Pont de Nemours and Co., Wilmington, Del. (V.StA.) Anlage und Verfahren für den Wärme austausch von Flüssigkeiten
US3804160A (en) * 1970-05-26 1974-04-16 Du Pont Fluid heat exchange system
US3805881A (en) * 1971-08-17 1974-04-23 Du Pont Fluid heat exchange system
US3863712A (en) * 1970-08-14 1975-02-04 Frank T Smith Liquid heat exchange system
DE2441333A1 (de) * 1973-08-30 1975-03-27 Teijin Ltd Vorrichtung zur behandlung von fluiden und verfahren zur herstellung derselben
DE2536494A1 (de) * 1975-08-16 1977-02-24 Bayer Ag Hohlfasermodul
WO1981000297A1 (en) * 1979-07-11 1981-02-05 Du Pont Apparatus with expandable tube bundle
US4256178A (en) * 1977-02-17 1981-03-17 Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft Coaxial heat exchanger and method for constructing a heat exchanger
US4271900A (en) * 1978-06-28 1981-06-09 E. I. Du Pont De Nemours And Company Apparatus with expandable tube bundle
WO1981002705A1 (en) * 1980-03-24 1981-10-01 Baxter Travenol Lab Forming diffusion membrane units with joined capillary membrane tubes
US4484624A (en) * 1978-11-06 1984-11-27 Akzo Nv Apparatus for transferring heat by means of hollow filaments, and its use in various heating systems
US4588026A (en) * 1979-06-11 1986-05-13 Raytheon Company Coiled heat exchanger
DE3508382A1 (de) * 1985-03-08 1986-09-11 Akzo Gmbh, 5600 Wuppertal Vorrichtung zur waerme- und/oder stoffuebertragung mit hilfe von hohlfaeden
DE3614339A1 (de) * 1986-04-28 1987-10-29 Akzo Gmbh Waermetauscher und verfahren zum herstellen von waermetauschern
DE3614342A1 (de) * 1986-04-28 1987-10-29 Akzo Gmbh Waerme- und/oder stoffaustauscher und verfahren zum herstellen von waerme- und/oder stoffaustauschern
WO1995026488A1 (en) * 1994-03-28 1995-10-05 Minntech Corporation Wound heat exchanger oxygenator
US5472044A (en) * 1993-10-20 1995-12-05 E. I. Du Pont De Nemours And Company Method and apparatus for interacting a gas and liquid on a convoluted array of tubes
US6390187B1 (en) * 1998-12-29 2002-05-21 Valeo Thermique Moteur Heat exchanger with flexible tubes
US20160109197A1 (en) * 2014-10-15 2016-04-21 Hamilton Sundstrand Corporation Prevention of cooling flow blockage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA971554A (en) * 1970-08-14 1975-07-22 Robert D. Smith Liquid heat exchange system
DE3216877C1 (de) * 1982-05-03 1983-11-03 Donald Dipl.-Ing. 1000 Berlin Herbst In ein Gehaeuse einbaubares Waermeaustauschelement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315740A (en) * 1965-01-14 1967-04-25 Du Pont Flexible plastic tube bundle and method of making
US3363680A (en) * 1966-07-21 1968-01-16 Du Pont Plastic tube heat exchanger with novel header construction

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315740A (en) * 1965-01-14 1967-04-25 Du Pont Flexible plastic tube bundle and method of making
US3363680A (en) * 1966-07-21 1968-01-16 Du Pont Plastic tube heat exchanger with novel header construction

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526274A (en) * 1968-06-04 1970-09-01 Du Pont Cross flow box cooler unit
FR2010138A1 (enExample) * 1968-06-04 1970-02-13 Du Pont
US3529664A (en) * 1969-04-23 1970-09-22 Du Pont End structure for thermoplastic tubing
DE2126248A1 (de) * 1970-05-26 1971-12-02 E.I. du Pont de Nemours and Co., Wilmington, Del. (V.StA.) Anlage und Verfahren für den Wärme austausch von Flüssigkeiten
US3804160A (en) * 1970-05-26 1974-04-16 Du Pont Fluid heat exchange system
US3863712A (en) * 1970-08-14 1975-02-04 Frank T Smith Liquid heat exchange system
US3805881A (en) * 1971-08-17 1974-04-23 Du Pont Fluid heat exchange system
DE2441333A1 (de) * 1973-08-30 1975-03-27 Teijin Ltd Vorrichtung zur behandlung von fluiden und verfahren zur herstellung derselben
DE2536494A1 (de) * 1975-08-16 1977-02-24 Bayer Ag Hohlfasermodul
US4256178A (en) * 1977-02-17 1981-03-17 Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft Coaxial heat exchanger and method for constructing a heat exchanger
US4271900A (en) * 1978-06-28 1981-06-09 E. I. Du Pont De Nemours And Company Apparatus with expandable tube bundle
US4484624A (en) * 1978-11-06 1984-11-27 Akzo Nv Apparatus for transferring heat by means of hollow filaments, and its use in various heating systems
US4588026A (en) * 1979-06-11 1986-05-13 Raytheon Company Coiled heat exchanger
WO1981000297A1 (en) * 1979-07-11 1981-02-05 Du Pont Apparatus with expandable tube bundle
WO1981002705A1 (en) * 1980-03-24 1981-10-01 Baxter Travenol Lab Forming diffusion membrane units with joined capillary membrane tubes
US4346006A (en) * 1980-03-24 1982-08-24 Baxter Travenol Laboratories, Inc. Diffusion membrane units with adhered semipermeable capillaries
DE3508382A1 (de) * 1985-03-08 1986-09-11 Akzo Gmbh, 5600 Wuppertal Vorrichtung zur waerme- und/oder stoffuebertragung mit hilfe von hohlfaeden
US4867233A (en) * 1986-04-28 1989-09-19 Akzo N.V. Heat exchanger and method of making heat exchangers
DE3614342A1 (de) * 1986-04-28 1987-10-29 Akzo Gmbh Waerme- und/oder stoffaustauscher und verfahren zum herstellen von waerme- und/oder stoffaustauschern
US4834930A (en) * 1986-04-28 1989-05-30 Akzo N.V. Method for the manufacture of apparatus for the transfer of heat and/or mass
DE3614339A1 (de) * 1986-04-28 1987-10-29 Akzo Gmbh Waermetauscher und verfahren zum herstellen von waermetauschern
US5472044A (en) * 1993-10-20 1995-12-05 E. I. Du Pont De Nemours And Company Method and apparatus for interacting a gas and liquid on a convoluted array of tubes
WO1995026488A1 (en) * 1994-03-28 1995-10-05 Minntech Corporation Wound heat exchanger oxygenator
US5706889A (en) * 1994-03-28 1998-01-13 Minntech Corporation Wound heat exchanger oxygenator
US5718869A (en) * 1994-03-28 1998-02-17 Minntech Corporation Wound heat exchanger oxygenator
US6390187B1 (en) * 1998-12-29 2002-05-21 Valeo Thermique Moteur Heat exchanger with flexible tubes
US20160109197A1 (en) * 2014-10-15 2016-04-21 Hamilton Sundstrand Corporation Prevention of cooling flow blockage
US10415903B2 (en) * 2014-10-15 2019-09-17 Hamilton Sundstrand Corporation Prevention of cooling flow blockage

Also Published As

Publication number Publication date
GB1199590A (en) 1970-07-22
FR1583962A (enExample) 1969-12-12

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AS Assignment

Owner name: AMETEK, INC., 410 PARK AVENUE, NEW YORK, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:E.I. DU PONT DE NEMOURS AND COMPANY;REEL/FRAME:004589/0577

Effective date: 19860602