US3817160A - Air door for cooler or the like - Google Patents

Air door for cooler or the like Download PDF

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Publication number
US3817160A
US3817160A US00250447A US25044772A US3817160A US 3817160 A US3817160 A US 3817160A US 00250447 A US00250447 A US 00250447A US 25044772 A US25044772 A US 25044772A US 3817160 A US3817160 A US 3817160A
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US
United States
Prior art keywords
air
duct
opening
air flow
air distribution
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
US00250447A
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English (en)
Inventor
J Searcy
M Rasch
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.)
Hussmann Corp
Original Assignee
Hussmann Refrigerator 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.)
Filing date
Publication date
Application filed by Hussmann Refrigerator Co filed Critical Hussmann Refrigerator Co
Priority to US00250447A priority Critical patent/US3817160A/en
Priority to CA169,431A priority patent/CA986354A/en
Priority to ZA732836A priority patent/ZA732836B/xx
Priority to GB2014173A priority patent/GB1428464A/en
Priority to AU55044/73A priority patent/AU466598B2/en
Priority to DE2322332A priority patent/DE2322332A1/de
Priority to FR7315964A priority patent/FR2183246B1/fr
Priority to JP48050231A priority patent/JPS4949250A/ja
Application granted granted Critical
Publication of US3817160A publication Critical patent/US3817160A/en
Assigned to HUSSMANN CORPORATION reassignment HUSSMANN CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). , EFFECTIVE DEC. 17, 1981 Assignors: HUSSMANN REFRIGERATOR CO.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains

Definitions

  • An air distribution system comprising an elongated duct disposed along at least one vertical side of an opening between a cold first zone and a warmer second zone, air moving means at one end of the duct forming a longitudinal air flow pattern in the duct, air distribution means for laterally diverting the air flow toward the side of the duct adjacent to the opening, and air discharge means constructed and arranged for discharging the air flow horizontally across said opening at a uniformly varying angle with the lowest level of the air flow being at a predetermined angle toward the cold zone and the uppermost level of the air flow being at a predetermined angle toward the warmer 6 Claims, 7 Drawing Figures AIR DOOR FOR COOLER OR THE LIKE BACKGROUND OF THE INVENTION
  • the invention relates generally to air distribution systems, and more particularly to improvements in air flow arrangements for doors or like openings between two zones of different temperature.
  • the invention comprises an air distribution system having a longitudinal duct vertically disposed at one side of an opening between relatively cold and warm zones, means for evenly distributing air throughout the duct and in a horizontal direction toward the side of the opening, and air discharge means arranged throughout its length to discharge air across the opening at constantly varying angles from an outward angle toward the warm zone at the top to an inward angle toward the cold zone at the bottom.
  • the principal object of the present invention is to provide a simple, effective air distribution system that will obviate the stack effect in openings communicating relatively cold and warm zones.
  • Another object is to provide an air distribution system adapted to distribute and balance air flow at relatively low velocities and discharge such air flow evenly across a doorway in predetermined varying directions, and which will eliminate the need for an air return.
  • Another object is to provide an air distribution system that is adaptable for installation under different environmental conditions, and is effectively operable in such different installations.
  • FIG. 1 is a front elevational view of a cooler door or like opening having an air distribution system embodying the present invention
  • FIG. 2 is a sectional view taken along line 2-2 of FIG. 1 showing, in end elevation, the air distribution system,
  • FIG. 3 is an enlarged perspective view of the air distribution system
  • FIG. 4 is a horizontal cross-sectional view taken substantially along line 4-4 of FIG. 2,
  • FIG. 5 is a horizontal cross-sectional view taken substantially along line 5-5 of FIG. 2,
  • FIG. 6 is a horizontal cross-sectional view taken substantially along line 6-6 of FIG. 2, and
  • FIG. 7 is a vertical cross-sectional view taken substantially along line 7-7 of FIG. 2.
  • an air distribution system 10 embodying the present invention is illustrated for purposes of disclosure, the air distribution system 10 is shown in a preferred application as forming an air curtain AC across a doorway opening 11 in a vertical wall 12 between a refrigerated walk-in cooler, meat cutting room or the like 13 and a warmer, ambient food store area 14 of the like.
  • this system may be readily adapted to other environmental applications such as isolating an air conditioned room from ambient.
  • the air system 10 comprises a longitudinal duct 16 extending vertically along one side of the doorway opening 11, the duct 16 including a wall member 17 attached to the cooler wall 12 and an outer opposed wall 18 defining there-between the width of the duct 16 and the lateral dimension of the air curtain to be formed by the system 10.
  • the rear side of the duct 16 is closed by a side wall 19 and the opposed side wall is adjacent to the plane of the opening 11 and defines the air discharge means, shown generally at 20, to be described presently.
  • the ductwork 16 is closed by a bottom wall 21 and a top wall 22.
  • the air distribution system 10 is of the nonrecirculating type and utilizes ambient air.
  • An air moving means 23 comprises a housing 24 for a squirrel cage blower 25 driven by a variable speed motor 26 to draw ambient air inwardly through a filtered intake port 27 and discharges an air flow downwardly through an air discharge conduit 28 secured to the top wall 22 of the duct.
  • the initial air flow of the air distribution system is vertically downwardly into a plenum chamber 29 of the duct 16, as represented by the arrows I in FIG. 7.
  • the plenum chamber 29 comprises a longitudinal wedge-shaped or tapering portion of the duct 16 defined on the air discharge side 20 by a velocity air distribution panel 31, preferably formed of honeycomb material comprising separate, multiple, contiguous, elongated passages 32 having parallel axes.
  • the panel 31 has upper and lower ends 33 and 34 engaged against the top and bottom walls 22 and 21 of the duct 16, and extends between the walls 17 and 18.
  • the bottom margin 34 of the panel 31 is spaced from the closed side wall 19 of the duct 16 a short predetermined distance, such as /2 inch as indicated by numeral 34, so that the angularity of the honeycomb panel 31 is preset to provide proper air distribution throughout the length of the plenum 29 in duct 16 in order that each passage 32 will receive substantially equal amounts of the air flow (I).
  • a panel 31 of honeycomb material having 3/16 inch cells and being /2 inch thick is effective to perform the added air distribution function of turning the initial air flow I into a substantially horizontal secondary air flow pattern S, as shown in FIG. 7.
  • a substantially vertical air balancing member 36 comprises a perforated metal panel having a lower edge 37 abutting the lower duct wall 21 and an upper edge 38 spaced below the top wall 22, but engaged against the honeycomb panel 31 adjacent to its upper edge 33 and spanning between the walls 17 and 18.
  • the metal panel 36 (called moire) has perforations 39 and, with the honeycomb panel 31, defines an inverted wedge-shaped settling chamber 40 to compensate for any minor non-uniformity in air velocities and distribution occurring by reason of installation mishandling or honeycomb imperfections.
  • the air discharge means 20 comprises another panel 41, preferably formed of honeycomb material having separate, multiple, contiguous, elongated, horizontally disposed passages 42, and it has been found that material having Vs inch cells and being 2 inches thick is effective for the air discharge function of this air distribution system 10. It should also be recognized that honeycomb material, while having sufficient rigidity to normally maintain its shape when subjected to normal air flow problems, also has a degree of flexibility that is important in carrying out the present invention.
  • an important aspect of the invention is the discovery that the plasticity of the honeycomb material may be utilized to provide relative angularity of air flow discharge by twisting the discharge panel 41 throughout its vertically longitudinal dimension.
  • the panel 41 is mounted in the duct 16 in a frame 43 maintaining a convolution of the panel to discharge the horizontal air curtain AC across the doorway 11 and provide a uniformly varying angularity of passages 42 in vertical disposition to each other.
  • the passages are at an out ward angle of from to 30 to act in opposition to the inward flow potential of the warmer air from ambient 14; and at the bottom, FIG.
  • the passages are at an inward angle of from 15 to 30 to act in opposition to the outward flow potential of the colder refrigerated zone 13.
  • the air discharge passages 42 are in the plane of the doorway opening 11, and it will be recognized that the angularity is constantly varying between these portions of the panel 41 and throughout its entire vertical length. It has been discovered that an angularity at the top and bottom of 20 from the plane of the opening 11 affords a satisfactory, efficient air curtain AC across the opening.
  • the drawings are exaggerated and show the framing 43 to be formed angularly from the plane of the walls 17 and 18. However, in practice this arrangement may not be necessary.
  • the flow potential of the air curain AC is represented in FIG. 2 by the arrows P as a linearly (phantom line L) counteracting force to the stack effect in order to better understand the phenomenon and the present invention.
  • the air moving means 23 draws ambient air into the intake port 27 and discharges the air flow pattern I downwardly at a predetermined relatively low velocity in the plenum chamber 29.
  • the angularity of the panel 31 relative to the length of the duct 16 provides an essentially even air distribution throughout the height of the duct; but, rather than utilizing static regain" (in which the plenum is pressurized to force the flow of air into a lateral or tangential component) the angle of attack of the air flow 1 into the passages 32 in panel 31 is arranged or adjusted by the spacing 34 so the passages 32 receive substantially equal amounts of air and the velocity head is used to accomplish both the air distribution factor in the plenum 29 and the lateral air movement or turning factor through the passages 32 into the horizontal or secondary air flow pattern S.
  • the moire air balancing member 36 evens out any discrepancies in the secondary air flow characteristics, and the horizontal air flow is then discharged through the air discharge panel 41 at different angles to compensate for the stack effect throughout the vertical dimension of the doorway 11.
  • the present air distribution system 10 may be utilized on doorways or like openings of different widths and is basically designed without requiring any air return or air curtain recirculation. However, it should be recognized that in exceedingly wide doorways opposed systems 10 may be employed or a push-pull air discharge and return arrangement may be more efficient.
  • the shape of the velocity profile provided by the blower 23 is constant; but at different cold-warm temperature extremes or varying temperatures, the stack effect may be more or less pronounced so that variation in the speed of the blower 23 may be required to compensate for the differences in flow potential.
  • An air distribution system for forming an air curtain across an opening between relatively cold and warm zones, comprising longitudinal duct means vertically disposed along one side of the opening, means for distributing air substantially evenly throughout said duct including air moving means positioned at one end of said longitudinal duct means and a velocity air distribution member angularly positioned in said duct means and defining therewith a tapering plenum chamber, said air moving means discharging an air flow vertically in said plenum chamber from the wider end to the narrower end thereof and said velocity air distribution member diverting said vertical air flow into a horizontal direction toward said opening, and air discharge means arranged throughout the vertical length of said opening to discharge an air curtain horizontally across the opening and at substantially constantly varying angles relative to the plane of said opening.
  • said velocity air distribution member comprises a panel formed of separate multiple, contiguous, elongated, substantially horizontally disposed passages having inlet ends positioned in said plenum chamber.
  • An air distribution system comprising an elongated duct disposed along at least one vertical side of an opening between a cold first zone and warmer second zone, air moving means at one end of said duct and forming an air flow longitudinally in the duct, air distribution means for laterally diverting said air flow toward the side of the duct adjacent to the opening, air balancing means for evening the lateral air flow throughout the length of said duct, and air discharge means at said one side of said duct and being constructed and arranged for discharging the air flow horizontally across said opening at a uniformly varying angle with the low est level of air flow being at a predetermined angle toward said cold zone and the uppermost level of air flow being at a predetermined angle toward the warmer zone.
  • An air distribution system for forming an air curtain across an opening between relatively cold and warm zones, comprising longitudinal duct means disposed along at least one side of the opening, means for distributing air substantially evenly throughout said duct including a velocity air distribution member angularly positioned in said duct means and defining therewith a tapering plenum chamber having a large end and a relatively narrow end and air moving means in communication with the large end of said plenum chamber, said air moving means discharging an air flow in the longitudinal direction of said duct means throughout said plenum chamber from the large end to the narrow end thereof and said velocity air distribution member diverting said air flow in a direction normal to said longitudinal duct and toward said opening, air discharge means arranged throughout its length to discharge an air curtain across the opening, and air balancing means extending longitudinally in said duct means between said velocity air distribution member and said air discharge means for evening the air flow to said air discharge means throughout the length of said duct means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Refrigerator Housings (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Duct Arrangements (AREA)
  • Air-Flow Control Members (AREA)
US00250447A 1972-05-04 1972-05-04 Air door for cooler or the like Expired - Lifetime US3817160A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00250447A US3817160A (en) 1972-05-04 1972-05-04 Air door for cooler or the like
CA169,431A CA986354A (en) 1972-05-04 1973-04-24 Air door for cooler or the like
ZA732836A ZA732836B (en) 1972-05-04 1973-04-26 Air door for cooler or the like
GB2014173A GB1428464A (en) 1972-05-04 1973-04-27 Air curtain distribution system
AU55044/73A AU466598B2 (en) 1972-05-04 1973-05-01 Air door for cooler or the like
DE2322332A DE2322332A1 (de) 1972-05-04 1973-05-03 Vorrichtung zum verteilen von luft und zum erzeugen eines luftvorhangs
FR7315964A FR2183246B1 (fr) 1972-05-04 1973-05-03
JP48050231A JPS4949250A (fr) 1972-05-04 1973-05-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00250447A US3817160A (en) 1972-05-04 1972-05-04 Air door for cooler or the like

Publications (1)

Publication Number Publication Date
US3817160A true US3817160A (en) 1974-06-18

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ID=22947797

Family Applications (1)

Application Number Title Priority Date Filing Date
US00250447A Expired - Lifetime US3817160A (en) 1972-05-04 1972-05-04 Air door for cooler or the like

Country Status (8)

Country Link
US (1) US3817160A (fr)
JP (1) JPS4949250A (fr)
AU (1) AU466598B2 (fr)
CA (1) CA986354A (fr)
DE (1) DE2322332A1 (fr)
FR (1) FR2183246B1 (fr)
GB (1) GB1428464A (fr)
ZA (1) ZA732836B (fr)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023472A (en) * 1974-06-04 1977-05-17 Ciba-Geigy Corporation Apparatus for producing a laminar flow
US4137649A (en) * 1973-04-21 1979-02-06 Vepa Ag Apparatus for the heat treatment of textiles
US4170930A (en) * 1976-12-09 1979-10-16 Lind Leif Ingemar Screen for improving the environment of a workplace having a plurality of working areas
US4214706A (en) * 1978-12-20 1980-07-29 Honeywell Information Systems Inc. Air distribution system
US4227317A (en) * 1973-04-21 1980-10-14 Vepa Aktiengesellschaft Apparatus for the heat treatment of textiles
US4261519A (en) * 1978-12-20 1981-04-14 Honeywell Information Systems Inc. Air distribution system
US4516482A (en) * 1984-04-24 1985-05-14 Smith George R Conditioned air vestibule for refrigerated warehouse doorway
US4674004A (en) * 1986-07-03 1987-06-16 Burroughs Corporation Parallel-flow air system for cooling electronic equipment
WO1998041413A1 (fr) * 1997-03-17 1998-09-24 Siemens Duewag Schienenfahrzeuge Gmbh Dispositif pour la production de rideaux d'air chauffe au niveau des ouvertures de portes, en particulier de vehicules de transport sur petites distances
NL1012612C2 (nl) * 1999-07-16 2001-01-17 Biddle B V Koeling voor voertuig.
US6595429B1 (en) 2002-04-03 2003-07-22 Asi Technologies, Inc. Apparatus and method for providing continuous real-time conditioned air curtain
US20040003617A1 (en) * 2002-05-17 2004-01-08 Chandler Michael S. Device and method for creating a horizontal air curtain for a cooler
US6705940B1 (en) * 2002-10-15 2004-03-16 Gary L. Moore Portable doorway bug deflector
US20040242145A1 (en) * 2003-05-27 2004-12-02 Mayekawa Mfg. Co., Ltd. Air shutter and installation method thereof
US7819729B2 (en) 2004-03-02 2010-10-26 Asi Technologies, Inc. Air curtain doorway
US20120216986A1 (en) * 2009-10-02 2012-08-30 Flakt Woods Ab Cooling beam with vav-function via a regulating strip
US8362404B2 (en) 2010-05-17 2013-01-29 Carter Hoffmann, Inc. Open warming cabinet
US20130276891A1 (en) * 2012-04-19 2013-10-24 Xerox Corporation Cooling flow accelerator
US20140037478A1 (en) * 2011-03-31 2014-02-06 Panasonic Corporation Ventilating fan
DE102015104705A1 (de) * 2014-04-04 2015-10-08 Teddington Luftschleieranlagen Gmbh Vorrichtung zur Erzeugung eines Luftschleiers
US11555619B2 (en) * 2017-02-14 2023-01-17 Shinwa Controls Co., Ltd. Air conditioner

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2981735A1 (fr) * 2011-10-24 2013-04-26 Francois Clavier Conseil Dispositif generant un rideau d'air dans la baie d'acces a une enceinte de conservation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971345C (de) * 1952-10-23 1959-01-15 Krantz H Fa Luftabschirmung fuer Raumwandoeffnungen
FR1363426A (fr) * 1963-05-03 1964-06-12 Perfectionnement apporté aux jets et lances d'arrosage, notamment à ceux pour le lavage des véhicules
US3190207A (en) * 1962-11-06 1965-06-22 P J Mac Inc Air curtain
US3218952A (en) * 1962-05-14 1965-11-23 Universal Match Corp Devices for producing air screens
US3301167A (en) * 1964-05-04 1967-01-31 Ray Products Company Inc Anticontaminant work bench

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308740A (en) * 1965-01-15 1967-03-14 Disco Eng Inc Draft-free air curtain closure
CA927659A (en) * 1970-07-01 1973-06-05 Lindestrom Lars-Erik Distributing device in plants for the maintenance of a dustfree, bacteriafree zone in a room

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971345C (de) * 1952-10-23 1959-01-15 Krantz H Fa Luftabschirmung fuer Raumwandoeffnungen
US3218952A (en) * 1962-05-14 1965-11-23 Universal Match Corp Devices for producing air screens
US3190207A (en) * 1962-11-06 1965-06-22 P J Mac Inc Air curtain
FR1363426A (fr) * 1963-05-03 1964-06-12 Perfectionnement apporté aux jets et lances d'arrosage, notamment à ceux pour le lavage des véhicules
US3301167A (en) * 1964-05-04 1967-01-31 Ray Products Company Inc Anticontaminant work bench

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137649A (en) * 1973-04-21 1979-02-06 Vepa Ag Apparatus for the heat treatment of textiles
US4227317A (en) * 1973-04-21 1980-10-14 Vepa Aktiengesellschaft Apparatus for the heat treatment of textiles
US4023472A (en) * 1974-06-04 1977-05-17 Ciba-Geigy Corporation Apparatus for producing a laminar flow
US4170930A (en) * 1976-12-09 1979-10-16 Lind Leif Ingemar Screen for improving the environment of a workplace having a plurality of working areas
US4214706A (en) * 1978-12-20 1980-07-29 Honeywell Information Systems Inc. Air distribution system
US4261519A (en) * 1978-12-20 1981-04-14 Honeywell Information Systems Inc. Air distribution system
US4516482A (en) * 1984-04-24 1985-05-14 Smith George R Conditioned air vestibule for refrigerated warehouse doorway
US4674004A (en) * 1986-07-03 1987-06-16 Burroughs Corporation Parallel-flow air system for cooling electronic equipment
WO1988000429A1 (fr) * 1986-07-03 1988-01-14 Unisys Corporation Systeme a courants d'air paralleles de refroidissement d'equipements electroniques
WO1998041413A1 (fr) * 1997-03-17 1998-09-24 Siemens Duewag Schienenfahrzeuge Gmbh Dispositif pour la production de rideaux d'air chauffe au niveau des ouvertures de portes, en particulier de vehicules de transport sur petites distances
NL1012612C2 (nl) * 1999-07-16 2001-01-17 Biddle B V Koeling voor voertuig.
EP1068973A1 (fr) * 1999-07-16 2001-01-17 Biddle B.V. Rideau d'air pour une porte de chargement de frêt d'un véhicule
US6442957B1 (en) 1999-07-16 2002-09-03 Biddle B.V. Refrigeration for vehicle
US6595429B1 (en) 2002-04-03 2003-07-22 Asi Technologies, Inc. Apparatus and method for providing continuous real-time conditioned air curtain
US20040003617A1 (en) * 2002-05-17 2004-01-08 Chandler Michael S. Device and method for creating a horizontal air curtain for a cooler
US6874331B2 (en) * 2002-05-17 2005-04-05 Manitowoc Foodservice Companies, Inc. Device and method for creating a horizontal air curtain for a cooler
US6705940B1 (en) * 2002-10-15 2004-03-16 Gary L. Moore Portable doorway bug deflector
US20040242145A1 (en) * 2003-05-27 2004-12-02 Mayekawa Mfg. Co., Ltd. Air shutter and installation method thereof
US7037189B2 (en) * 2003-05-27 2006-05-02 Mayekawa Mfg. Co., Ltd. Air shutter and installation method thereof
US20060199500A1 (en) * 2003-05-27 2006-09-07 Mayekawa Mfg. Co., Ltd. Air shutter and installation method thereof
US7544122B2 (en) 2003-05-27 2009-06-09 Mayekawa Mfg. Co., Ltd. Air shutter and installation method thereof
US7819729B2 (en) 2004-03-02 2010-10-26 Asi Technologies, Inc. Air curtain doorway
US8342233B2 (en) * 2009-10-02 2013-01-01 Flakt Woods Ab Cooling beam with VAV-function via a regulating strip
US20120216986A1 (en) * 2009-10-02 2012-08-30 Flakt Woods Ab Cooling beam with vav-function via a regulating strip
US8362404B2 (en) 2010-05-17 2013-01-29 Carter Hoffmann, Inc. Open warming cabinet
US20140037478A1 (en) * 2011-03-31 2014-02-06 Panasonic Corporation Ventilating fan
US9709066B2 (en) * 2011-03-31 2017-07-18 Panasonic Ecology Systems Guangdong Co., Ltd. Ventilating fan
US20130276891A1 (en) * 2012-04-19 2013-10-24 Xerox Corporation Cooling flow accelerator
US9148978B2 (en) * 2012-04-19 2015-09-29 Xerox Corporation Cooling flow accelerator
DE102015104705A1 (de) * 2014-04-04 2015-10-08 Teddington Luftschleieranlagen Gmbh Vorrichtung zur Erzeugung eines Luftschleiers
US11555619B2 (en) * 2017-02-14 2023-01-17 Shinwa Controls Co., Ltd. Air conditioner

Also Published As

Publication number Publication date
AU466598B2 (en) 1975-10-30
CA986354A (en) 1976-03-30
GB1428464A (en) 1976-03-17
FR2183246A1 (fr) 1973-12-14
FR2183246B1 (fr) 1975-12-26
ZA732836B (en) 1974-04-24
DE2322332A1 (de) 1973-11-22
AU5504473A (en) 1974-11-07
JPS4949250A (fr) 1974-05-13

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AS Assignment

Owner name: HUSSMANN CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:HUSSMANN REFRIGERATOR CO.;REEL/FRAME:003967/0206

Effective date: 19811211