US3858644A - Fan shroud exit structure - Google Patents

Fan shroud exit structure Download PDF

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Publication number
US3858644A
US3858644A US348437A US34843773A US3858644A US 3858644 A US3858644 A US 3858644A US 348437 A US348437 A US 348437A US 34843773 A US34843773 A US 34843773A US 3858644 A US3858644 A US 3858644A
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US
United States
Prior art keywords
fan
shroud
section
radial
exit
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
US348437A
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English (en)
Inventor
Harold D Beck
Thomas L Hanna
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.)
Navistar Inc
Case LLC
Original Assignee
International Harverster Corp
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.)
Filing date
Publication date
Application filed by International Harverster Corp filed Critical International Harverster Corp
Priority to US348437A priority Critical patent/US3858644A/en
Priority to CA184,881A priority patent/CA989264A/en
Priority to DE2411268A priority patent/DE2411268A1/de
Priority to FR7411232A priority patent/FR2224319B1/fr
Priority to SE7404429A priority patent/SE405390B/xx
Priority to IT50041/74A priority patent/IT1004095B/it
Priority to JP49037772A priority patent/JPS49129033A/ja
Priority to NL7404586.A priority patent/NL158256B/xx
Priority to SU742014725A priority patent/SU735161A3/ru
Priority to BR2686/74A priority patent/BR7402686D0/pt
Priority to AU67566/74A priority patent/AU471445B2/en
Priority to GB1516274A priority patent/GB1467659A/en
Application granted granted Critical
Publication of US3858644A publication Critical patent/US3858644A/en
Assigned to PATTERSON, LINDA L., TRUSTEE, FIDELITY UNION BANK, TRUSTEE reassignment PATTERSON, LINDA L., TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: INTERNATIONAL HARVESTER COMPANY
Assigned to INTERNATIONAL HARVESTER COMPANY reassignment INTERNATIONAL HARVESTER COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FIRST FIDELTY BANK, NATIONAL ASSOCIATION PATTERSON, LINDA L.; TRUSTEES
Assigned to J.I. CASE COMPANY A DE CORP reassignment J.I. CASE COMPANY A DE CORP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL HARVESTER COMPANY A DE CORP
Assigned to CASE CORPORATION, A CORP. OF DELAWARE reassignment CASE CORPORATION, A CORP. OF DELAWARE CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: J. I. CASE COMPANY, A CORP. OF DELAWARE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/06—Guiding or ducting air to, or from, ducted fans
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/914—Device to control boundary layer

Definitions

  • ABSTRACT An internal combustion engine, having a heat exchange system, a fan for moving air therethrough and a shroud and shroud exit section for controlling the air path.
  • the shroud exit encloses the fan and includes throat (CF) radial expander (R) and radial flat (RF) sections whereby air is drawn through the heat exchanger axially and expelled radially along said exit sections simultaneously interruption sections or cutout portion are strategically located in the shroud exit to direct parts of the air flow whereby they exit axially.
  • the fan has a projected axial width (AW) such that a general relationship exists with the shroud exit sections: CF AW/3, RF AW/3, and R 2AW/3.
  • a vehicle having a fluid cooled internal combustion engine and a radiator cooling system for dissipating the heat produced.
  • the radiator cooling system includes a standard radiator, an axial flow fan facing the radiator and having a plurality of angular blades whereby air is drawn rearwardly through the radiator.
  • a shroud rearwardly extends from the back face of the radiator to channel air through the radiator and hamper the fan from drawing air which has not passed through or at least come in contact with the perforated heat exchanging surfaces of the radiator. For the most part the shroud encloses the entire perforated heat exchanging rear area of the radiator.
  • a fan shroud exit means is also provided having secured to the backwardly extending portion of the fan shroud and extending rearwardly thereof as well as outwardly.
  • this exit section in combination with an axial flow fan located therein, the location thereof also being important, which allows the air stream to be converged and part directed radially and part axially away.
  • the simultaneous discharge of air via axial and radial flow paths around the circumference of the shroud exit allows avoidance of structural obstructions etc., while still achieving an optimum air flow.
  • this invention is also applicable to a stationary engine where it is desired to tailor the air stream.
  • FIG. I is a side elevation of an internal combustion engine showing the device of my invention attached to a vehicle;
  • FIG. 2 is a fragmentary vertical section showing the relationship of the fan to the contoured exit section
  • FIG. 3 is a top view of a tractor showing the air stream of the prior art fan assemblies
  • FIG. 4 is a top view of a tractor showing the directed air stream achieved with the radiator cooling assembly herein disclosed;
  • FIG. 5 is a rear view of the shroud exit section showing one embodiment of the interruption section means
  • FIG. 6 is a side view of FIG. 5;
  • FIG. 7 is a rear view of the shroud exit section showing a second embodiment of the interruption section means.
  • FIG. 8 is a top view of the shroud exit of FIG. 7.
  • FIG. I there is shown a conventional water cooled heat producing internal combustion engine means 10 forwardly carried on longitudinally extending parallel support means 12 of vehicle means 14.
  • vehicle means I4 is a tractor, however, as will hereafter become more apparent this invention can be applied to any type of vehicle employing a heat generating internal combustion engine or any other portable or stationary device requiring an air moving fan.
  • a water cooling radiator means 16 employed to dissipate the engine generated heat. Water flows between the water jacket on the engine (not shown) and the radiator through a series of fluid communicating means 118 and 20.
  • sheet metal means 22 encircles engine means It) thereby forming the engine compartment area means 24.
  • fan means 28 Carried at the forward end of engine means 10 is a fan shaft means 26 whereby power is delivered to drive fan means 28.
  • fan means 28 is a rotatable suction fan positioned opposite the radiator means 16, and normally creating a flow of air or drawing in a stream of cooling air rearwardly through the radiator with a subsequent axial dis charge thereof. This axial flow of air is directed to the fan means by a shroud means 30.
  • the particular shape of the forward section 32 is dependent upon the shape and design of the perforated heat exchanging design of the radiator.
  • connection between the leading edge 32 and the rear face 34 of the radiator will be dependent upon the particular characteristics of these componets, that is, some connections being providedwith air gaps while others are substantially sealed over the entire circumference of the enclosure.
  • the entire perforated area is substantially sealed against the passage of air from any other direction except through the radiator. From the forward edges the shroud means 30 (be it a taper transition as shown or a box type) converges rearwardly to a circular rear section 36.
  • Exit shroud means 38 includes a tubular means 40, an arcuated means portion 42 and a flat flange portion means 44.
  • tubular means portion 40 forms the leading edge of the exit shroud means while arcuated means portion 42 still extending generally rearwardly simultaneously extends outwardly around an arch the reference point of which is defined as point 46.
  • arcuated section 42 has a general bell-shaped appearance being a section of a transition surface or some approximation thereof.
  • arcuated section 42 is a section of a constant radius arch.
  • Flat flange portion 44 forms the trailing edge of exit shroud means 38 and has a major plane perpendicular to that of tubular section 40.
  • tubular means 40 will be hereafter referred to as the cylindrical throat means
  • arcuated portion 42 will be referred to as the radial expanding means
  • flat flange portion 44 will be referred to as radial flat means.
  • Overall the entire fan shroud exit means 38 has a horn-like configuration.
  • fan means 28 is rotatingly carried adjacent said radiator means and operably to establish a flow of cooling air therethrough.
  • Fan means 28 includes a plurality of fan blade means 48 (only one shown) as is well known in the art. As shown in FIG. 2 fan means 28 is surrounded by said contoured fan shroud exit section 38. The enclosure of the fan means 28 within shroud means 30 is such that a front plane struck out by the leading edge 50 is coextensive and passes through the leading section of throat means 40 and a rear plane struck out by trailing edge 52 is about coextensive and parallel with said radial flat portion 44. It should be noted, however, that there is a plus or minus error factor involved in both of these values of about 12 percent of AW. That is, the respective planes formed by the blade means can be within about 12 percent of optimum and still function satisfactorily within the scope of this invention. Thus, within this range the deflected air stream will still be substantially radial.
  • RF AW/3, CF AW/3, and R 2AW/3 there RF is the length of the radial flat portion 44, CF is the length of the cylindrical throat section 40 and R is a radius of the radial expanding section 42 or distance from the reference point to the transition surface and AW is the projected axial width of fan 28.
  • FIGS. 3 and 4 show the path in which air is dispersed by the fan means comprising again a standard assembly and the improved assembly, the improved assembly having louver means 56 to facilitate air dispersement.
  • the amount or relation of the fan means 28 to the exit section means 38 is most conveniently expressed in terms of the amount of the fan which is exposed past the end of the shroud or projects rearwardly thereof. It has been found that a X equal to zero gives optimum results; however, reasonable results can be achieved by having X about equal to plus or minus 12 percent of AW. That is, as explained previously when the plane swept out by the rear edge is coextensive with the surface of the radial flat or within the tolerance set forth. By changing the orientation of the fan with respect to the fan exit section it is also possible to direct the air stream, straight back, at an angle off radial. etc., depending on preference and need.
  • FIGS. 5 8 wherein are shown different embodiments of the interruption section means whereby the discharged air stream is part radial and part axially. Hence, it is possible to tailor the pattern of air discharged from shroud exit 38.
  • the interruption section means 51 and 51a shown in FIG. 5 extend through both the radial flat means 44 and the transitional surface means 42.
  • the interruption section means 51b and 51c shown in FIG. 7 extend through both the radial flat means 44 and the transitional surface means 42 and also forms an extension of the cylindrical throat means 40.
  • interruption section means of different design and location.
  • the cylindrical throat means 40 is cut back as abreviated throat means 55 it is possible to direct the straight axial flow radially. That is, the rear edge means 57 can be in a plane parallel with the plane passing through radial flat means 44 but transistionally disposed thereof. That is, a third plane perpendicular to edge means 57 would pass through fan means 28 some where between its front and rear plane. Such horizontal movement allows for further control of the air stream exiting adjacent the interruption section.
  • a heat transfer system for an internal combustion engine comprising:
  • a heat exchange means having a front and rear section
  • a shroud including a forward section arranged to enclose said rear section, and a rearwardly extending unitary contoured exit section including means defining a cylindrical throat, a radial expanding section and a radial flat portion;
  • a fan assembly including a plurality of fan blades having leading and trailing edges wherein the following relationship within plus or minus 12 percent of AW exists: RF AW/3, CF AW/3, and R 2AW/3 where RF is the length of the radial flat portion, CF is the length of the cylindrical throat, R is the radius of the radial expanding section and AW is the projected axial width of the fan means wherein the improvement comprises: an interruption section means in said shroud exit means whereby the continuity is changed and the fan induced stream of air will have radial and axial components.
  • a cooling system for an internal combustion engine means comprising:
  • a radiator means including a tube means, and a rearward area means
  • a shroud means having a forward section arranged to include said rearward area, and a rearwardly extending unitary contoured exit section means including a cylindrical throat means, a radial expanding section means and a radial flat portion means;
  • a fan assembly means including a plurality of fan blade means having leading and trailing edge means, said leading edge means being adjacent said radiator means, wherein the following relationship plus or minus 12 percent exists: RF AW/3, CF AW/3, and R 2AW/3 where RF is the length of the radial flat portion, CR is the length of the cylindrical throat, R is the radius of the radial expanding section and AW is the projected axial width of the fan whereby the fan induced stream of air is converged and directed out generally radially adjacent said radial flat portion means and generally axially adjacent said interruption section means.
  • said radiator means includes a rearwardly extending perforated area means
  • said shroud means entirely encloses said perforated area means
  • said trailing edge of said fan means forms a plane coextensive with said radial flat means wherein the following relationship exists: RF AW/3, CF AW/3, and R 2AW/3 where RF is the length of the radial flat portion, CF is the length of the cylindrical throat, R is the radius of the radial expanding section and AW is the projected axial width of the fan.
  • a vehicle having an operator station and an internal combustion engine, a radiator for cooling liquid from said engine, an axial flow fan axially facing said radiator and including a plurality of angular blades drawing air rearwardly through said radiator, and a shroud rearwardly extending from said radiator wherein the improvement comprises:
  • a unitary fan shroud exit means secured to said shroud and extending rearwardly and outwardly including: a cylindrical throat means defining a leading edge, a radial expanding means and a radial flat means defining a trailing edge; said fan being enclosed therein, said blade means striking out a front plane coextensive with said cylindrical throat means wherein the following relationship exists: RF
  • said fan shroud exit means is secured to said shroud around its entire circumference
  • said interruption section means has a rear edge means, whereby a plane perpendicular to said edge means intersects said fan blade means between said front plane and said rear plane.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US348437A 1973-04-05 1973-04-05 Fan shroud exit structure Expired - Lifetime US3858644A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US348437A US3858644A (en) 1973-04-05 1973-04-05 Fan shroud exit structure
CA184,881A CA989264A (en) 1973-04-05 1973-11-02 Fan shroud exit structure
DE2411268A DE2411268A1 (de) 1973-04-05 1974-03-08 Kuehleinrichtung, insbesondere fuer kraftfahrzeuge
FR7411232A FR2224319B1 (enExample) 1973-04-05 1974-03-29
SE7404429A SE405390B (sv) 1973-04-05 1974-04-02 For motorfordon avsedd vermeoverforingsanordning
JP49037772A JPS49129033A (enExample) 1973-04-05 1974-04-03
NL7404586.A NL158256B (nl) 1973-04-05 1974-04-03 Koelinrichting, voorzien van een radiator, een ventilator en een van de radiator tot om de ventilator lopende omhulling.
IT50041/74A IT1004095B (it) 1973-04-05 1974-04-03 Perfezionamento nelle disposizio ni di effusore per radiatori di e veicoli a motore
SU742014725A SU735161A3 (ru) 1973-04-05 1974-04-04 Транспортное средство
BR2686/74A BR7402686D0 (pt) 1973-04-05 1974-04-04 Sistemas de refrigeracao e de dissipacao de calor aperfeicoados e veiculo utilizando o mesmo
AU67566/74A AU471445B2 (en) 1973-04-05 1974-04-04 Fan shroud exit structure
GB1516274A GB1467659A (en) 1973-04-05 1974-04-05 Fan and cowl assembly in a vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US348437A US3858644A (en) 1973-04-05 1973-04-05 Fan shroud exit structure

Publications (1)

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US3858644A true US3858644A (en) 1975-01-07

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Application Number Title Priority Date Filing Date
US348437A Expired - Lifetime US3858644A (en) 1973-04-05 1973-04-05 Fan shroud exit structure

Country Status (12)

Country Link
US (1) US3858644A (enExample)
JP (1) JPS49129033A (enExample)
AU (1) AU471445B2 (enExample)
BR (1) BR7402686D0 (enExample)
CA (1) CA989264A (enExample)
DE (1) DE2411268A1 (enExample)
FR (1) FR2224319B1 (enExample)
GB (1) GB1467659A (enExample)
IT (1) IT1004095B (enExample)
NL (1) NL158256B (enExample)
SE (1) SE405390B (enExample)
SU (1) SU735161A3 (enExample)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937192A (en) * 1974-09-03 1976-02-10 General Motors Corporation Ejector fan shroud arrangement
US3964449A (en) * 1974-04-08 1976-06-22 Hans List Cooler-cum-blower assembly for internal combustion engines
US3995603A (en) * 1974-04-08 1976-12-07 Hans List Cooler-cum-blower assembly for internal combustion engines
US4018297A (en) * 1975-11-03 1977-04-19 Allis-Chalmers Corporation Four-piece fan shroud
US4120271A (en) * 1975-09-09 1978-10-17 Motoren- Und Turbinen-Union Friedrichshafen Gmbh Ventilating arrangement for an engine compartment
US4173995A (en) * 1975-02-24 1979-11-13 International Harvester Company Recirculation barrier for a heat transfer system
US4194556A (en) * 1978-01-13 1980-03-25 Toyota Jidosha Kogyo Kabushiki Kaisha Cooling apparatus for an internal combustion engine
EP0026997A1 (en) * 1979-10-09 1981-04-15 General Motors Corporation Shroud arrangement for engine cooling fan
US4394111A (en) * 1981-09-11 1983-07-19 Snyder General Corporation Top cover, motor, fan and fan shroud assembly for an air conditioning unit
US20040156712A1 (en) * 2003-01-29 2004-08-12 Siemens Vdo Automotive Inc. Integral tip seal in a fan-shroud structure
US20050002799A1 (en) * 2003-06-03 2005-01-06 Saied Fathi Radiator cooling fan replacement to increase engine efficiency
US20060272800A1 (en) * 2005-06-02 2006-12-07 Paccar Inc Radiator fan shroud with flow directing ports
US20070224044A1 (en) * 2006-03-27 2007-09-27 Valeo, Inc. Cooling fan using coanda effect to reduce recirculation
USD594548S1 (en) * 2008-05-16 2009-06-16 Patterson Fan Company Fan housing
US20090162195A1 (en) * 2007-12-21 2009-06-25 Paccar Inc Fan ring shroud assembly
WO2010081813A1 (en) * 2009-01-14 2010-07-22 Novenco A/S An axial blower
JP2010530949A (ja) * 2007-06-22 2010-09-16 サーモ キング ドイチュラント ゲーエムベーハー 陸上、道路、及び鉄道車両用の冷凍コンテナ
US20100242527A1 (en) * 2007-06-22 2010-09-30 Ole Thogersen Refrigerated container for ships
US20110293419A1 (en) * 2010-05-31 2011-12-01 Hisanori Koya System and Methods for Wind Energy Recapture From a Non Natural Wind Source
US20120307440A1 (en) * 2010-02-26 2012-12-06 Franz John P Mixed-flow ducted fan
USD688366S1 (en) * 2012-11-30 2013-08-20 Vornado Air, Llc Air circulator
WO2015050769A1 (en) * 2013-10-04 2015-04-09 Caterpillar Inc. Double bell mouth shroud
USD736261S1 (en) * 2012-11-29 2015-08-11 Cummins Inc. Shroud
US20170152854A1 (en) * 2014-08-18 2017-06-01 Ebm-Papst Mulfingen Gmbh & Co. Kg Axial fan
US20200291960A1 (en) * 2019-03-15 2020-09-17 Deere & Company Fan shroud
USD921883S1 (en) 2018-07-25 2021-06-08 Vornado Air, Llc Fan head

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4137703C1 (enExample) * 1991-11-15 1992-12-10 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De

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US1671373A (en) * 1927-10-24 1928-05-29 Thomas B Martin Double cooling fan for automobiles or the like
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US1966787A (en) * 1931-03-27 1934-07-17 Sulzer Ag Cooling fan for vehicles driven by internal combustion engines
US2142307A (en) * 1934-06-14 1939-01-03 Mey Rene De Mounting of axial flow fans and the like
US2225398A (en) * 1939-09-13 1940-12-17 Clyde M Hamblin Construction of ventilating fans
US2252256A (en) * 1939-01-11 1941-08-12 Harris Eliot Huntington Sound attenuator for air impellers
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US1190777A (en) * 1915-06-15 1916-07-11 Motor Cooling Systems Company Cooling system.
US1519812A (en) * 1923-06-04 1924-12-16 Schneider Heinrich Locomotive driven by internal-combustion engine
US1691598A (en) * 1925-08-23 1928-11-13 Sulzer Ag Internal-combustion-engine locomotive
US1671373A (en) * 1927-10-24 1928-05-29 Thomas B Martin Double cooling fan for automobiles or the like
US1966787A (en) * 1931-03-27 1934-07-17 Sulzer Ag Cooling fan for vehicles driven by internal combustion engines
US2142307A (en) * 1934-06-14 1939-01-03 Mey Rene De Mounting of axial flow fans and the like
US2252256A (en) * 1939-01-11 1941-08-12 Harris Eliot Huntington Sound attenuator for air impellers
US2225398A (en) * 1939-09-13 1940-12-17 Clyde M Hamblin Construction of ventilating fans
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US2544490A (en) * 1949-07-07 1951-03-06 Jeffrey Mfg Co Adjustable cowling for fans or the like
US2668523A (en) * 1952-12-11 1954-02-09 Chrysler Corp Fan shroud
US3144859A (en) * 1962-02-15 1964-08-18 Young Radiator Co Fan-shroud structure and mounting
US3508517A (en) * 1967-02-20 1970-04-28 Kort Propulsion Co Ltd Nozzles or shrouds for ships' propellers
US3675424A (en) * 1969-05-19 1972-07-11 Lips Nv Nozzle for ship{40 s propeller with water ejection along the trailing edge of the nozzle

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964449A (en) * 1974-04-08 1976-06-22 Hans List Cooler-cum-blower assembly for internal combustion engines
US3995603A (en) * 1974-04-08 1976-12-07 Hans List Cooler-cum-blower assembly for internal combustion engines
US3937192A (en) * 1974-09-03 1976-02-10 General Motors Corporation Ejector fan shroud arrangement
US4173995A (en) * 1975-02-24 1979-11-13 International Harvester Company Recirculation barrier for a heat transfer system
US4120271A (en) * 1975-09-09 1978-10-17 Motoren- Und Turbinen-Union Friedrichshafen Gmbh Ventilating arrangement for an engine compartment
US4018297A (en) * 1975-11-03 1977-04-19 Allis-Chalmers Corporation Four-piece fan shroud
US4194556A (en) * 1978-01-13 1980-03-25 Toyota Jidosha Kogyo Kabushiki Kaisha Cooling apparatus for an internal combustion engine
EP0026997A1 (en) * 1979-10-09 1981-04-15 General Motors Corporation Shroud arrangement for engine cooling fan
US4394111A (en) * 1981-09-11 1983-07-19 Snyder General Corporation Top cover, motor, fan and fan shroud assembly for an air conditioning unit
US6874990B2 (en) * 2003-01-29 2005-04-05 Siemens Vdo Automotive Inc. Integral tip seal in a fan-shroud structure
US20040156712A1 (en) * 2003-01-29 2004-08-12 Siemens Vdo Automotive Inc. Integral tip seal in a fan-shroud structure
US20050002799A1 (en) * 2003-06-03 2005-01-06 Saied Fathi Radiator cooling fan replacement to increase engine efficiency
US7008175B2 (en) * 2003-06-03 2006-03-07 Saied Fathi Radiator cooling fan replacement to increase engine efficiency
WO2005119011A1 (en) * 2004-05-24 2005-12-15 Saied Fathi Radiator cooling fan replacement to increase engine efficiency
US20060272800A1 (en) * 2005-06-02 2006-12-07 Paccar Inc Radiator fan shroud with flow directing ports
US20070224044A1 (en) * 2006-03-27 2007-09-27 Valeo, Inc. Cooling fan using coanda effect to reduce recirculation
US7478993B2 (en) 2006-03-27 2009-01-20 Valeo, Inc. Cooling fan using Coanda effect to reduce recirculation
US20100251753A1 (en) * 2007-06-22 2010-10-07 Ole Thogersen Refrigerating container for land, road and rail vehicles
JP2010530949A (ja) * 2007-06-22 2010-09-16 サーモ キング ドイチュラント ゲーエムベーハー 陸上、道路、及び鉄道車両用の冷凍コンテナ
US20100242527A1 (en) * 2007-06-22 2010-09-30 Ole Thogersen Refrigerated container for ships
US20090162195A1 (en) * 2007-12-21 2009-06-25 Paccar Inc Fan ring shroud assembly
US8221074B2 (en) 2007-12-21 2012-07-17 Paccar Inc Fan ring shroud assembly
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US20170152854A1 (en) * 2014-08-18 2017-06-01 Ebm-Papst Mulfingen Gmbh & Co. Kg Axial fan
US11365741B2 (en) * 2014-08-18 2022-06-21 Ebm-Papst Mulfingen Gmbh & Co. Kg Axial fan with increased rotor diameter
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Also Published As

Publication number Publication date
JPS49129033A (enExample) 1974-12-10
FR2224319A1 (enExample) 1974-10-31
DE2411268A1 (de) 1974-10-24
IT1004095B (it) 1976-07-10
SU735161A3 (ru) 1980-05-15
SE405390B (sv) 1978-12-04
NL158256B (nl) 1978-10-16
FR2224319B1 (enExample) 1978-03-10
NL7404586A (enExample) 1974-10-08
CA989264A (en) 1976-05-18
AU471445B2 (en) 1976-04-29
BR7402686D0 (pt) 1974-11-19
AU6756674A (en) 1975-10-09
GB1467659A (en) 1977-03-16

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