US3887777A - Refrigerator door switch having vertical drain passage - Google Patents

Refrigerator door switch having vertical drain passage Download PDF

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Publication number
US3887777A
US3887777A US390612A US39061273A US3887777A US 3887777 A US3887777 A US 3887777A US 390612 A US390612 A US 390612A US 39061273 A US39061273 A US 39061273A US 3887777 A US3887777 A US 3887777A
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Prior art keywords
flange portion
casing
switch
main body
freezing chamber
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US390612A
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Shiro Nishino
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H01H13/18—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H01H13/183—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift for actuation by moving a closing member, e.g. door, cover
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D27/00—Lighting arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/04—Refrigerators with a horizontal mullion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/02—Sensors detecting door opening

Definitions

  • FIG. 1 is a front view of a refrigerator having a freez
  • This invention relates generally to door switches and, g Chamber, wherein a door Switch S stalled i 8 Sepmore particularly, to door switches for use in refrigerators having freezing chambers.
  • the door switch in a refrigerator with a freezing chamber normally operates a fan motor when the door of the refrigerator is closed, and it stops the fan motor and turns on a lamp illuminating inside of the refrigeratorwhen the door is opened.
  • the freezing chamber is ordinarily provided above the refrigerating chamber, and icemaking trays are provided in the freezing chamber. When the trays are filled with water, and initially inserted into the freezing chamber, a portion of the water frequently drips out of the ice-making trays.
  • the door switch is installed in its normal location, i.e.,
  • the ice-making trays may get inside the door switch
  • a primary object of the present invention to provide an improved door switch for use in a refrigerator with a freezing chamber, which is so constructed that any water dripped thereon can be readily drained downwardly therethrough to prevent intrusion of the water inside the door switch.
  • Another object of the invention is to provide an improved door switch for use in a refrigerator having a freezing chamber, wherein draining of water through the switch can be achieved without requiring additional parts, thus minimizing the manufacturing cost of the door switch.
  • Still another object of the invention is to provide an improved door switch for use in a refrigerator having a freezing chamber which facilitates manufacture and assembly of the switch while minimizing the possibility of water getting inside the switch.
  • An additional object of the invention is to provide such an improved refrigerator door switch which is selfmounting so that the switch can be mounted in a selected position without requiring mounting screws or the like.
  • an improved refrigerator door switch which comprises an integrally constructed outer casing having a main body portion, a flange portion, and at least two laterally spaced members interconnecting the main body portion and the flange portion, with at least two push-buttons extending through said flange portion into said interconnecting members, and with waterdraining passages formed between said flange portion and said body portion of the casing and adjacent the interconnecting members for draining water running out of the freezing chamber downwardly through the casing.
  • FIG. 2 is a sectional view, on an enlarged scale, taken along the line A-A in FIG. 1;
  • FIG. 3 is a perspective view of a door switch according to the present invention.
  • FIGS. 1 through 3 there is illustrated a door switch according to the present invention which comprises a switch casing 1 having a flange portion 2, two cylindrical portions 3, 3a parallelly extended from the flange portion 1 in spaced apart relationship, and a main body 4 integrally coupled to the ends of the two cylindrical portions 3, 3a. .in the cylindrical portions 3 and 3a, push buttons 5 and 5a are inserted for actuating two push-button switches, one for the freezing chamber and the other for the refrigerating chamber, contained Within the switch casing I.
  • the door switch is installed in a recessed portion 9 of a separating wall 8 between the upper freezing chamber 6 and the lower refrigerating chamber 7, with the flange portion 2 of the switch casing 1 abutting the outer surface of the front panel 10 of the separating wall 8 as shown in more detail in FIG. 2.
  • two resilient self-seizing strips 11 and 11a provided on opposite ends of the switch casing I are urged against the inner walls 12, 12 of the recessed portion 9, whereby the door switch can be installed in its position without requiring any screws or the like, by merely snapping the switch into the recess 9.
  • flanges 15 and 16 are provided on the door 13 for the freezing chamber 6 and the door 14 for the refrigerating chamber 7, at positions corresponding to the push buttons 3 and 3a, so that when either one of the doors 13 or 14 is closed, the corresponding flange 15 or 16 depresses the corresponding push button 3 or 3a, and when the door is opened, the push button thus depressed is released.
  • a plurality of water-draining passages 18 are formed through the switch casing l at spaced positions between the inner surface 17 of the flange portion 2 and the main body 4. More specifically, in the illustrative embodiment of the invention, two of the draining passages 18 are provided between the cylindrical portions 3 and 3a and a pair of end ribs 4a and 4b extending between the main body 4 and the flange portion 2, outboard of the cylindrical portions 3 and 3a. A third passage 18 of a larger size is provided between the two cylindrical portions 3 and 3a, again in the region between the inner surface 17 of the flange portion 2 and the main body 4 of the switch casing 1. It should be particularly noted that all the drain passages 18 extend entirely through the switch casing. l in the vertical direction.
  • the illustrative door switch is installed in the separating wall 8 between the freezing chamber 6 and the refrigerating chamber 7; consequently, when water runs out of the ice-making trays in the freezing chamber 6, or when the chamber 6 is washed with water, a portion of the water flows from the freezing chamber 6 along the front panel 10 of the separating wall 8 to the gap between the inner surface 17 of the flange portion 2 of the switch casing 1 and the front panel 10.
  • any water flowing into the gap between the inner surface 17 of the flange portion 2 and the front panel 10 is immediately drained downwardly through these water-draining passages 18, and the possibility of water getting inside the switch casing 1 is thereby minimized along with the hazard of electric shock.
  • the pushbutton receiving parts of the switch casing l are formed into cylindrical configurations 3 and 3a, as described above, to guide the water into the water draining pas sages 18.
  • a refrigerator having a refrigerator door and a freezing chamber door, a door switch comprising the combination of:
  • a casing having a main body portion, a flange portion and at least two laterally spaced members interconnecting said main body portion and said flange portion, said laterally spaced members forming at least one vertical water-draining passage between said flange portion and said main body portion of said casing for draining water running out of said freezing chamber downwardly through said casing, and at least two push buttons mounted on the opposite side of said flange portion from said main body portion and extending into said laterally spaced members for operating switches within said casing, one of said push buttons engaging the refrigerator door and the another of said push buttons engaging the freezing chamber door.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

A door switch for a refrigerator having a freezing chamber. The switch comprises at least two push buttons and an integrally constructed outer casing having a flange portion, at least two cylindrical portions extending perpendicularly from the flange portion and laterally spaced from each other, and a main body portion integrally connected to the ends of the cylindrical portions opposite to the flange portion. The two push buttons extend through the flange portion into the cylindrical portions. Water-draining passages are formed between the flange portion and the main body of the switch casing, adjacent the cylindrical portions, for draining water running out of the freezing chamber downwardly through the switch casing.

Description

I United States Patent .1191 1111 3,887,777 Nishino June 3, 1975 [54] REFRIGERATOR DOOR SWITCH HAVING 3,676,626 7/1972 Mitchell 200/153 V VERTICAL DRAIN PASSAGE 3,789,176 l/l974 Pick 200/168 G [76] Inventor: Shiro Nishino, No. 462 Nakakosaka, Primary Examiner Robert K schaefer Hlgashosaka'sh" Osaka Japan Assistant Examiner-Gerald P. T0111] [22] Filed: Aug. 22, 1973 Attorney, Agent, or Firm-Wolfe, Hubbard, Leydig, [21] Appl No: 390,612 Volt & Osann, Ltd.
57 ABSTRACT [30] Foreign Application Priority Data 1 Au 3] 1972 la an 47 102315 A door switch for a refrigerator havmg a freezmg p chamber. The switch comprises at least two push but- 52 US. (:1 200/61.69; 200/50; 200/159 R; tons and l casmg. havmg ZOO/302 ZOO/340 a flange portlon, at least two cylmdncal port1ons ex- [51] Int Cl H01h 3/16 tending perpendicularly from the flange portion and 58 Field of Search 200/5 A, 50, 18, 61.62, lateianfspmd each her, and a mam i portion integrally connected to the ends of the cylin- ZOO/61.69, 61.7,153 T, 159 R, 168 R, 168 G 5 E 159 A 160 302 303 306 328 340 drlcal portlons opposite to the flange portion. The two push buttons extend through the flange portion into the cylindrical portions. Water-draining passages are [56] References Cited formed between the flange portion and the main body UNITED STATES PATENTS of the switch casing, adjacent the cylindrical portions, 2,832,850 4/1958 Mekelburg 200/5 D for draining water running out of the freezing chamber 3,406,270 10/1968 S110 200/153 T downwardly through the Switch Casing 3,446,467 5/1969 Bailey 200/168 C 7 3,674,970 7/1972 Bedocs 200/168 C 1 Claim, 3 Drawing Figures BACKGROUND OF THE INVENTION BRIEF DESCRIPTION OF THE DRAWINGS In the drawings: 1 FIG. 1 is a front view ofa refrigerator having a freez This invention relates generally to door switches and, g Chamber, wherein a door Switch S stalled i 8 Sepmore particularly, to door switches for use in refrigerators having freezing chambers.
The door switch in a refrigerator with a freezing chamber normally operates a fan motor when the door of the refrigerator is closed, and it stops the fan motor and turns on a lamp illuminating inside of the refrigeratorwhen the door is opened. In refrigerators having freezing chambers, the freezing chamber is ordinarily provided above the refrigerating chamber, and icemaking trays are provided in the freezing chamber. When the trays are filled with water, and initially inserted into the freezing chamber, a portion of the water frequently drips out of the ice-making trays. Thus, if the door switch is installed in its normal location, i.e.,
the ice-making trays may get inside the door switch,
thus causing an electric shock hazard.
SUMMARY OF THE INVENTION It is, therefore, a primary object of the present invention to provide an improved door switch for use in a refrigerator with a freezing chamber, which is so constructed that any water dripped thereon can be readily drained downwardly therethrough to prevent intrusion of the water inside the door switch.
Another object of the invention is to provide an improved door switch for use in a refrigerator having a freezing chamber, wherein draining of water through the switch can be achieved without requiring additional parts, thus minimizing the manufacturing cost of the door switch.
Still another object of the invention is to provide an improved door switch for use in a refrigerator having a freezing chamber which facilitates manufacture and assembly of the switch while minimizing the possibility of water getting inside the switch.
An additional object of the invention is to provide such an improved refrigerator door switch which is selfmounting so that the switch can be mounted in a selected position without requiring mounting screws or the like.
These and other objects of the present invention are achieved by an improved refrigerator door switch which comprises an integrally constructed outer casing having a main body portion, a flange portion, and at least two laterally spaced members interconnecting the main body portion and the flange portion, with at least two push-buttons extending through said flange portion into said interconnecting members, and with waterdraining passages formed between said flange portion and said body portion of the casing and adjacent the interconnecting members for draining water running out of the freezing chamber downwardly through the casing. The nature, principle, and utility of the present invention will be more clearly understood from the following detailed description of the invention when read in conjunction with the accompanying drawings, wherein like parts are designated by like reference numerals.
arating wall between the freezing chamber and the refrigerating chamber;
FIG. 2 is a sectional view, on an enlarged scale, taken along the line A-A in FIG. 1; and
FIG. 3 is a perspective view of a door switch according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION Referring now to FIGS. 1 through 3, there is illustrated a door switch according to the present invention which comprises a switch casing 1 having a flange portion 2, two cylindrical portions 3, 3a parallelly extended from the flange portion 1 in spaced apart relationship, and a main body 4 integrally coupled to the ends of the two cylindrical portions 3, 3a. .in the cylindrical portions 3 and 3a, push buttons 5 and 5a are inserted for actuating two push-button switches, one for the freezing chamber and the other for the refrigerating chamber, contained Within the switch casing I.
As clearly shown in FIG. 1, the door switch is installed in a recessed portion 9 of a separating wall 8 between the upper freezing chamber 6 and the lower refrigerating chamber 7, with the flange portion 2 of the switch casing 1 abutting the outer surface of the front panel 10 of the separating wall 8 as shown in more detail in FIG. 2. In this case, two resilient self- seizing strips 11 and 11a provided on opposite ends of the switch casing I are urged against the inner walls 12, 12 of the recessed portion 9, whereby the door switch can be installed in its position without requiring any screws or the like, by merely snapping the switch into the recess 9.
On the door 13 for the freezing chamber 6 and the door 14 for the refrigerating chamber 7, there are provided flanges 15 and 16, respectively, at positions corresponding to the push buttons 3 and 3a, so that when either one of the doors 13 or 14 is closed, the corresponding flange 15 or 16 depresses the corresponding push button 3 or 3a, and when the door is opened, the push button thus depressed is released.
In accordance with an important aspect of the present invention, a plurality of water-draining passages 18 are formed through the switch casing l at spaced positions between the inner surface 17 of the flange portion 2 and the main body 4. More specifically, in the illustrative embodiment of the invention, two of the draining passages 18 are provided between the cylindrical portions 3 and 3a and a pair of end ribs 4a and 4b extending between the main body 4 and the flange portion 2, outboard of the cylindrical portions 3 and 3a. A third passage 18 of a larger size is provided between the two cylindrical portions 3 and 3a, again in the region between the inner surface 17 of the flange portion 2 and the main body 4 of the switch casing 1. It should be particularly noted that all the drain passages 18 extend entirely through the switch casing. l in the vertical direction.
The illustrative door switch is installed in the separating wall 8 between the freezing chamber 6 and the refrigerating chamber 7; consequently, when water runs out of the ice-making trays in the freezing chamber 6, or when the chamber 6 is washed with water, a portion of the water flows from the freezing chamber 6 along the front panel 10 of the separating wall 8 to the gap between the inner surface 17 of the flange portion 2 of the switch casing 1 and the front panel 10. However, because of the provision of the water draining passages 18 at positions adjacent to the inner surface 17 of the flange portion 2 of the switch casing 1, any water flowing into the gap between the inner surface 17 of the flange portion 2 and the front panel 10 is immediately drained downwardly through these water-draining passages 18, and the possibility of water getting inside the switch casing 1 is thereby minimized along with the hazard of electric shock. It should be noted that the pushbutton receiving parts of the switch casing l are formed into cylindrical configurations 3 and 3a, as described above, to guide the water into the water draining pas sages 18.
Although the invention has been described with respect to a preferred embodiment thereof; it will be apparent to those skilled in the art that various modifications and alterations can be carried out without departing from the spirit and scope of the invention. For example, the end ribs 4a and 4b interconnecting the 4 flange portion 2 and the'main body 4 could be eliminated if desired.
I claim 1. ln combinationwith a refrigerator having a refrigerator door and a freezing chamber door, a door switch comprising the combination of:
a. a casing having a main body portion, a flange portion and at least two laterally spaced members interconnecting said main body portion and said flange portion, said laterally spaced members forming at least one vertical water-draining passage between said flange portion and said main body portion of said casing for draining water running out of said freezing chamber downwardly through said casing, and at least two push buttons mounted on the opposite side of said flange portion from said main body portion and extending into said laterally spaced members for operating switches within said casing, one of said push buttons engaging the refrigerator door and the another of said push buttons engaging the freezing chamber door.

Claims (1)

1. In combination with a refrigerator having a refrigerator door and a freezing chamber door, a door switch comprising the combination of: a. a casing having a main body portion, a flange portion and at least two laterally spaced members interconnecting said main body portion and said flange portion, said laterally spaced members forming at least one vertical water-draining passage between said flange portion and said main body portion of said casing for draining water running out of said freezing chamber downwardly through said casing, and b. at least two push buttons mounted on the opposite side of said flange portion from said main body portion and extending into said laterally spaced members for operating switches within said casing, one of said push buttons engaging the refrigerator door and the another of said push buttons engaging the freezing chamber door.
US390612A 1972-08-31 1973-08-22 Refrigerator door switch having vertical drain passage Expired - Lifetime US3887777A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4300025A (en) * 1979-12-10 1981-11-10 General Electric Company Refrigerator door switch
US4342886A (en) * 1979-09-10 1982-08-03 Robertshaw Controls Company Burner valve control device, an electrical switch unit therefor and methods of making the same
US4434339A (en) 1980-10-11 1984-02-28 Nihon Kaiheiki Kogyo Kabushiki Kaisha Mounting frame equipped wth decorative plate for mounting switch or the like
US5172805A (en) * 1991-05-23 1992-12-22 Northern Telecom Limited Pushbutton and carrying member combination for operating an electronic switching device
US5212359A (en) * 1992-02-03 1993-05-18 Eastman Kodak Company Multiple interface safety switch actuating mechanism
EP0777091A3 (en) * 1995-11-29 2000-05-03 Electrolux Zanussi S.p.A. Improvement in the explosion-proof switch for a refrigeration apparatus
US20060005997A1 (en) * 2004-07-08 2006-01-12 Lg Electronics Inc. Door switch assembly for washing machine and dryer
US20090064723A1 (en) * 2007-09-04 2009-03-12 Lg Electronics Inc. Laundry treatment machine and door switch thereof
WO2009116721A1 (en) 2008-03-18 2009-09-24 Lg Electronics Inc. Refrigerator
US20110005264A1 (en) * 2009-07-08 2011-01-13 Lg Electronics Inc. Refrigerator
EP2562499A1 (en) * 2011-08-26 2013-02-27 Thetford Corporation Refrigerator with externally mounted lighting
EP4001811A1 (en) * 2020-10-23 2022-05-25 BSH Hausgeräte GmbH Domestic refrigerator with a crosspiece and a light module specifically attached thereto

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832850A (en) * 1955-05-20 1958-04-29 Square D Co Interlock push button electric switch
US3406270A (en) * 1965-11-06 1968-10-15 Nippon Kogaku Kk Switch control comprising a rotatable ring pivoting a t-shaped lever for a miniaturetype motor-driven instrument
US3446467A (en) * 1967-03-13 1969-05-27 Switchcraft Panel mounting for electrical components and the like
US3674970A (en) * 1970-10-23 1972-07-04 Cherry Electrical Prod Panel-mounted switch
US3676626A (en) * 1970-06-15 1972-07-11 Trw Inc Pushbutton switch with liquid drainage facilitating cage body, and diaphragm sealing and actuating means
US3789176A (en) * 1971-12-27 1974-01-29 Honeywell Inc Diaphragm seal arrangement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832850A (en) * 1955-05-20 1958-04-29 Square D Co Interlock push button electric switch
US3406270A (en) * 1965-11-06 1968-10-15 Nippon Kogaku Kk Switch control comprising a rotatable ring pivoting a t-shaped lever for a miniaturetype motor-driven instrument
US3446467A (en) * 1967-03-13 1969-05-27 Switchcraft Panel mounting for electrical components and the like
US3676626A (en) * 1970-06-15 1972-07-11 Trw Inc Pushbutton switch with liquid drainage facilitating cage body, and diaphragm sealing and actuating means
US3674970A (en) * 1970-10-23 1972-07-04 Cherry Electrical Prod Panel-mounted switch
US3789176A (en) * 1971-12-27 1974-01-29 Honeywell Inc Diaphragm seal arrangement

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342886A (en) * 1979-09-10 1982-08-03 Robertshaw Controls Company Burner valve control device, an electrical switch unit therefor and methods of making the same
US4300025A (en) * 1979-12-10 1981-11-10 General Electric Company Refrigerator door switch
US4434339A (en) 1980-10-11 1984-02-28 Nihon Kaiheiki Kogyo Kabushiki Kaisha Mounting frame equipped wth decorative plate for mounting switch or the like
US5172805A (en) * 1991-05-23 1992-12-22 Northern Telecom Limited Pushbutton and carrying member combination for operating an electronic switching device
US5212359A (en) * 1992-02-03 1993-05-18 Eastman Kodak Company Multiple interface safety switch actuating mechanism
EP0777091A3 (en) * 1995-11-29 2000-05-03 Electrolux Zanussi S.p.A. Improvement in the explosion-proof switch for a refrigeration apparatus
US20060005997A1 (en) * 2004-07-08 2006-01-12 Lg Electronics Inc. Door switch assembly for washing machine and dryer
US7154058B2 (en) * 2004-07-08 2006-12-26 Lg Electronics Inc. Door switch assembly for washing machine and dryer
US20090064723A1 (en) * 2007-09-04 2009-03-12 Lg Electronics Inc. Laundry treatment machine and door switch thereof
US8161776B2 (en) * 2007-09-04 2012-04-24 Lg Electronics Inc. Laundry treatment machine and door switch thereof
WO2009116721A1 (en) 2008-03-18 2009-09-24 Lg Electronics Inc. Refrigerator
US20110023529A1 (en) * 2008-03-18 2011-02-03 Kim Do-Hyung Refrigerator
EP2268988A4 (en) * 2008-03-18 2016-12-14 Lg Electronics Inc FRIDGE
US20110005264A1 (en) * 2009-07-08 2011-01-13 Lg Electronics Inc. Refrigerator
US8434837B2 (en) * 2009-07-08 2013-05-07 Lg Electronics Inc. Refrigerator
EP2562499A1 (en) * 2011-08-26 2013-02-27 Thetford Corporation Refrigerator with externally mounted lighting
EP4001811A1 (en) * 2020-10-23 2022-05-25 BSH Hausgeräte GmbH Domestic refrigerator with a crosspiece and a light module specifically attached thereto

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Publication number Publication date
JPS5035409Y2 (en) 1975-10-15
JPS4959154U (en) 1974-05-24

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