Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2858408 A
Publication typeGrant
Publication dateOct 28, 1958
Filing dateOct 25, 1957
Priority dateOct 25, 1957
Publication numberUS 2858408 A, US 2858408A, US-A-2858408, US2858408 A, US2858408A
InventorsBarroero Louis F
Original AssigneeBarroero Louis F
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Refrigerated freezer cabinets having heated door frames and doors therefor
US 2858408 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Oct. 28, 1958 L F. BARROERO 2,858,408

REFRIGERATED FREEZER CABINETS HAVING HEATED DOOR FRAMES AND DOORS THEREFOR Filed 091:. 25, 1957 II I VII/Illa I Ii 3 33 -7 Z2 INVENTOR. 7 "I/IIIII/ tau/s AfiIPPOEPO 4 I a 50 M W M ing past the door edges into the cabinet.

United States Patent Louis F. Barroero, San Leandro, Application October 25, 1957, Serial No. 692,486

1 Claim. (Cl. 219-19) This invention relates 'to refrigerated freezer cabinets and more particularly to a refrigerated freezer cabinet having heated doors and door frames.

Refrigerated freezer display cabinets have come into extensive use in grocery stores and the like for storage, display and sale of frozen foods. However, most such cabinets have been of the top opening variety rather than of an upright type with front opening doors, primarily because of the difliculty of maintaining the doors of such upright cabinets free from ice.

Although upright refrigerator cabinets with front opening doors have been used for years in the handling of non-frozen foods, it has been found that such an arrangement could notbe eifectively used when frozen foods are to be handled, because of the tendency for the doors to ice up and resist easy opening. I have found that such icing is a result of maintaining the inside of the cabinet at a temperature below freezing, and also that it is practically impossible to prevent air from leak- As a'result, the relatively warm room air contacts portions of the door and door frame which are held below freezing by the low temperature inside the cabinet, and the incoming air cools to condense the water therein on the door and door frame, which water then freezes into ice, causing the door to stick to the door frame. This elfect is noted to some extent in front opening cabinets having swinging doors, but is much more prevalent in sliding doors, as the doors are much harder to seal against air flow therepast. Furthermore, in sliding doors, ice will tend to form on the trackways and guides on which the doors slide, again preventing easy door opening.

I have found that the objectionable icing of vertically A disposed freezer doors can be eliminated by embedding heating elements around the peripheries of the door frame and the doors to maintain the temperature of the contacting surfaces thereof above the freezing temperature of water. With these surfaces maintained above the freezing point, air leaking between the doors and door frames will not condense and freeze on the doors and door frames. With this problem eliminated, the primary drawback to the successful use of front opening freezer cabinets is removed.

It is the primary object of this invention to provide a vertically disposed freezer cabinet having a front opening door fram and door with means to heat the said frame and door to prevent icing therebetween.

It is a further object of the invention to provide a freezer cabinet having a door frame and a front opening door therefor with means to heat said frame and door around the peripheries thereof to prevent icing thereof by air leaking therepast.

Other objects and advantages will become apparent in the course of the following detailed description.

In the drawings, forming a portion of this application, and in which like parts are designated by like reference numerals throughout the same,

Fig. 1 is a front elevational view of a refrigerator Patented Oct. 28, 1958 2 cabinet and a door assembly embodying the principles of the invention. i

Fig. 2 is a sectional view taken on line 2--2 of Fig. 1.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 1.

Fig. 4 is a sectional view taken on line 4-4 of Fig. 1.

Referring now to the drawings, the reference numeral 10 designates generally a vertically disposed refrigerated freezer cabinet in which door frame 11 is mounted in the front wall thereof. The vertically disposed door frame 11 is metallic, preferably aluminum, and comprises upper and lower frame members 12 and 13, and two side members 14 and 16. Two sliding doors 17 and 18 are mounted in door frame 11 for sliding movement relative thereto in a manner to be hereinafter described.

The sliding doors 17 and 18 are constructed generally in accordance with my prior Patent No. 2,701,395, ,entitled Refrigerator Door, issued February 8, 1955, whereby each door has upper and lower channel members 21 and 22 and side channels 23 and 24, and a double paned glass window 26. The channel members 21, 22, 23 and 24 are metallic and preferably aluminum. A handle 27 is attached to each door to enable the. doors to be opened.

A roller assembly 28 fits within a dovetailed groove 29 formed longitudinally in the upper door channel 21 and has its roller riding in a depending trackway 31 formed integrally with the upper frame member 12 of door frame 11, so that the door may slide open relative to the frame. Two such roller assemblies 28 are'provided for each door, each roller assemblybeing disposed'adjacent a side edge of the door. The lower door channel member 22 has a similar longitudinal groove 32 slidably embracing the longitudinally extending rib or track member 33 formed on the lower; door frame member'13, to properly guide the door in its opening and closing movement. Door 18 is similarly suspended from trackway 34 and guided by rib 36.

Each of the door channel members 21, 22, 23 and 24 has therein a thermally non-conductive core, preferably a wood fillet, 37, 38, 39 and 40, respectively. Insulated sealing strips 41, 42, 43 and 44 are applied to the rear surfaces of these wooden fillets, as illustrated, with sealing strip 44 being provided with rearwardly extending ribs 46 to engage door 18 and seal oflf air flow therebetween when the doors are closed.

The door frame 11 is mounted to the cabinet 10 with a Z-shaped insulation strip 47 interposed therebetween. As shown in Fig. 3, an insulating strip 48 extends along the door frame member 14, to be engaged by door 17 when the latter is in closed position, to prevent air flow therebetween, and also to cushion the door upon closing thereof.

A plurality of electrical resistance heating elements 51 are wound around the periphery of the door frame 11 in generally parallel spaced relationship, these elements being held in heating contact or engagement with the door frame by the insulating strip 47. Although four such elements are shown in the drawing, it is contemplated that more or less than this number may be employed, if desired. The heating elements 51 can be connected in series or parallel arrangement, again as desired, and are then connected to a suitable electric power source by suitable means (not shown). It will be noted that all of the heat generated in these resistance elements will be absorbed by the door frame, as the insulating strip 47 will prevent heat flow from the heating elements 51 to the body of the cabinet 10.

The doors 17 and 18 are also provided with heating means embedded around the peripheries thereof. As will be seen in the drawings, the wooden fillets 37, 38, 39 and 40 have longitudinally extending grooves 52, 53, 54 and 55, respectively, therein adjacent the top, bottom and sides of the doorchannels 21, 22, 23 and 24, respectively,

. opened.

.,-.Similarly,'"the frameheating elements 51 associated to .receive the electrical v resistance hea'tingelements 56, which thus surround the door. Again, although two such resistance elements are shown, more or less than this number may be employed, if desired. The heating eledesired, and are then connected by a flexible electrical cord (not shown) to a sourceiof electrical power.

I As will be seen in Fig. 2, the top frame member 12 will be heated by the heating elements 51, with the heat being conducted through the metal frame to heat the trackways 31 and 34. The heating elements'56 in the top channel 21 of the door will heat the channel 21, such heat I being conducted upwardly to the roller assembly 28. This combined heating willthen prevent; any icing of the trackways or the rollers so that the door may be easily with the loweriframemember 13will heat the guide. ribs 33am 36, while the door heating elements 56 will heat }the' lowen-door channel 22jto prevent any icing of the ribs or the-door channel.

In like-manner, the sideframe'member 14..and the M side door channel-23r are-both heated to prevent any ice from formingbetween the door and theframe which wouldv prevent'opening of the-doors. Also, the side channel member 24 of door 17 and the side channel 23 of door 17 are both heated so that no ice may form therebetween when the doors are closed, again preventing the doors .fromfreezing together when closed.

It is to beunderstood that the'doorframe and doors the dors,:alone, although thebest results will be obtained by the heating of both.

'4 The form of the invention shown" herein is a preferred embodiment of the same, and various changesmay be made in the shape, size and arrangement of parts without departing from the.spirit of the invention or the scope of the attached claim.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

A refrigerated freezer cabinet, a vertically disposed metallic door frame mounted in the front wall of 'said cabinet, a heat insulating strip disposed around said door frame and between said door frame and said front wall, upper and lower track members formed on said door frame, a pair of doorseach'having a'metallic periphery and a longitudinal groove along the bottom side thereof, roller members carried by the upper sides of said doors, said doors being mounted-in said door frame with said roller members engaging said upper track members and said groove embracing said lower track members for guided sliding movement of saiddoors in said door frame, an -electrical.resistance'element 'disposed.around the periphery of said'door'frameIand between said door frame and said insulating strip .to. heat said door frame and said track members formed thereon, and an electrical resistance element embedded in each of said doorsaround the peripheries thereof in heating relation to said metallic peripheries, 'rollermembers and grooves.

" ReferencesCited in the file of this patent UNITED STATES PATENTS 1,561,290 Wicke Nov. 10, 1925 1,894,205 Stollsteimer Jan. 10, 1933 2,400,168 Roach May 14, 1946 2,460,469 Rifkin et al Feb. 1, 1949 2,515,294 w Cowgill July 18, 1950 2,690,585 Nordahl Oct. 5, 1954 2,701,395 Ba'rroero Feb. 8, 1955 2,731,804 Grubbs "1. Jan. 24,- 1956 2,811,406 Moore et a1 Oct. 29, 1957

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1561290 *Apr 6, 1925Nov 10, 1925A C Wicke Mfg CompanyCover plate for display cases
US1894205 *Apr 23, 1931Jan 10, 1933C V Hill & Co IncMeans for preventing frosting or condensation of moisture on glass or other surfaces
US2400168 *Mar 24, 1942May 14, 1946Roach Charles JRefrigerator defroster
US2460469 *Dec 7, 1946Feb 1, 1949Frex O Mat CorpRefrigerator having a door heating device
US2515294 *Jun 18, 1947Jul 18, 1950Us Rubber CoFreezing unit defroster
US2690585 *Apr 13, 1948Oct 5, 1954Nordahl AndrewHanger for showcase doors
US2701395 *Mar 31, 1954Feb 8, 1955Barroero Louis FRefrigerator door
US2731804 *Jun 11, 1954Jan 24, 1956 Frost preventer for freezer doors
US2811406 *Jan 25, 1956Oct 29, 1957Amana Refrigeration IncGasket
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3008380 *Sep 30, 1959Nov 14, 1961Cowley Richard TWaterproof gun cover
US3014250 *Jun 22, 1959Dec 26, 1961Rolscreen CoDoor structure
US3038319 *Feb 26, 1958Jun 12, 1962Gen Motors CorpHeated refrigerator door seal
US3055193 *Nov 14, 1958Sep 25, 1962Gen Motors CorpRefrigerating apparatus
US3064110 *Feb 19, 1960Nov 13, 1962R M P Ind LtdHeated frame element for door and window constructions
US3064539 *May 22, 1959Nov 20, 1962Cowley Richard TSealing arrangement for a pivoted closure
US3066212 *Jul 21, 1960Nov 27, 1962Gen ElectricThermal isolation of oven liner
US3074124 *Jul 1, 1959Jan 22, 1963John E BergstedtDisplay refrigerator doors
US3075255 *Aug 4, 1958Jan 29, 1963Taubman SamuelRolling panel closure means
US3115020 *Jun 26, 1961Dec 24, 1963Gen Motors CorpRefrigerating apparatus
US3122891 *Dec 11, 1958Mar 3, 1964Air Prod & ChemCryogenic methods and apparatus
US3135100 *Oct 23, 1961Jun 2, 1964Hopkins Fortescue WApparatus for preventing freeze-up of refrigerator doors
US3177989 *Dec 12, 1962Apr 13, 1965Di Chiaro Joseph ARefrigerator door construction
US3401994 *Mar 27, 1967Sep 17, 1968Arthur G. DiackOverhead track and lock assembly for showcases
US3440767 *Oct 20, 1966Apr 29, 1969Umc IndGlass lid for refrigerated merchandising cabinet
US3462885 *Oct 17, 1967Aug 26, 1969Miller BrosSafety edge for a door
US3508361 *Nov 29, 1968Apr 28, 1970Ardco IncSliding door assembly
US3628289 *May 25, 1970Dec 21, 1971Beverage Air CoSliding door construction
US3673735 *Dec 31, 1969Jul 4, 1972Ardco IncGlass panel refrigerator door
US3702521 *Sep 18, 1970Nov 14, 1972Hager & Sons Hinge MfgCloset construction
US3742814 *Jul 6, 1971Jul 3, 1973Us NavyFrangible cover assembly for missile launchers
US3854165 *May 14, 1973Dec 17, 1974Arizona Glass & MirrorPanel door assembly
US3859502 *Feb 11, 1974Jan 7, 1975Anthony S Mfg CoDefrosting system for refrigerator doors
US4004370 *Mar 3, 1975Jan 25, 1977Anthony's Manufacturing Company, Inc.Insulated door mounting frame structure
US4080756 *Oct 9, 1975Mar 28, 1978Anthony's Manufacturing Company, Inc.Insulated refrigerator door frame
US4127765 *Feb 17, 1978Nov 28, 1978Anthony's Manufacturing Company, Inc.Anti-condensation system for refrigerator doors
US4213029 *Feb 21, 1979Jul 15, 1980The United States Of America As Represented By The Secretary Of The NavyRadiation transmissive housing having a heated load bearing gasket
US4380265 *Feb 23, 1981Apr 19, 1983Mohaupt Henry HMethod of treating a hydrocarbon producing well
US4520602 *Aug 3, 1981Jun 4, 1985Thermetic Glass, Inc.Multi-pane sealed window and method for forming same
US4588235 *Sep 7, 1984May 13, 1986Barroero Louis FRefrigerator door structure
US4776379 *Sep 25, 1986Oct 11, 1988NergecoRiser for a vertically-opening door
US4792659 *May 22, 1987Dec 20, 1988Thomas Paul HGarage door opener heater
US4855567 *Jan 15, 1988Aug 8, 1989Rytec CorporationFrost control system for high-speed horizontal folding doors
US4936049 *Jun 26, 1989Jun 26, 1990Hansen Leslie NAirtight door
US4950869 *Oct 19, 1988Aug 21, 1990Rytec CorporationFrost control system for high-speed mechanized doors
US5246053 *Aug 26, 1991Sep 21, 1993NergecoRiser for a vertically-opening door
US5269154 *Jul 17, 1992Dec 14, 1993Whirlpool CorporationHeated ice door for dispenser
US5338109 *Jan 15, 1993Aug 16, 1994Raymond HainesHand gun safety storage cabinet
US5351442 *Aug 27, 1992Oct 4, 1994Gingras Jean PierreDoor closure for refrigeration housing
US6226995Jun 15, 1999May 8, 2001Rytec CorporationFrost control system for a door
US6324853 *Sep 28, 2000Dec 4, 2001Spx CorporationDe-icing for low temperature refrigeration devices
US6381904 *Jun 27, 2000May 7, 2002Kohler Co.Track mounted bath doors with clip anti-derailer
US7259359 *Jun 15, 2005Aug 21, 2007Commercial Refrigerator Door Company, Inc.Automated glass entrance door assembly for walk-in coolers
US7340907May 9, 2005Mar 11, 2008Computer Process Controls, Inc.Anti-condensation control system
US8297334 *Sep 25, 2006Oct 30, 2012Chen-Ho ChuSliding panel
US8402695Aug 5, 2010Mar 26, 2013Magna Mirrors Of America, Inc.Heated rear slider window assembly
US8613161Aug 20, 2008Dec 24, 2013Anthony, Inc.Refrigerator door construction including a laminated package
US8881458Sep 14, 2011Nov 11, 2014Magna Mirrors Of America, Inc.Slider window assembly
US8915018Dec 21, 2011Dec 23, 2014Magna Mirrors Of America, Inc.Slider window assembly
US8938914May 10, 2013Jan 27, 2015Magna Mirrors Of America, Inc.Slider window assembly with cable guides
US8955271Sep 17, 2013Feb 17, 2015Steelcase Inc.Sliding door assembly
US9174515Dec 17, 2014Nov 3, 2015Magna Mirrors Of America, Inc.Method of assembling a slider window assembly
US9234376 *Mar 26, 2010Jan 12, 2016True Manufacturing Co, Inc.Top hung door assembly
US9242533Oct 30, 2014Jan 26, 2016Magna Mirrors Of America, Inc.Slider window assembly
US9475364Oct 9, 2014Oct 25, 2016Magna Mirrors Of America, Inc.Sealing system for movable window of rear window assembly
US9486114 *Mar 10, 2014Nov 8, 2016Kohler Co.Removable header for a shower door track assembly
US20050183442 *Feb 24, 2005Aug 25, 2005Hygema Terry L.Heated ice door
US20050268627 *May 9, 2005Dec 8, 2005Vogh Richard P IiiAnti-condensation control system
US20060236613 *Feb 14, 2006Oct 26, 2006Ewing K BThermally broken hanging panel system
US20060277850 *Jun 8, 2005Dec 14, 2006Gravel Donald PPartition panel assembly
US20060283850 *Jun 15, 2005Dec 21, 2006Jerry DaveyAutomated glass entrance door assembly for walk-in coolers
US20070033874 *Aug 12, 2005Feb 15, 2007Home Decor Holding CompanyConcealed top track system for sliding doors
US20070261799 *Sep 25, 2006Nov 15, 2007Chen-Ho ChuSliding panel
US20100043293 *Aug 20, 2008Feb 25, 2010Anthony, Inc.Refrigerator door construction including a laminated package
US20100242370 *Mar 26, 2010Sep 30, 2010Trulaske Sr Steven LTop hung door assembly
US20110030276 *Aug 5, 2010Feb 10, 2011Magna Mirrors Of America, Inc.Heated rear slider window assembly
US20120305538 *May 31, 2012Dec 6, 2012Thomas LundCondensation reduction system for aluminum windows
US20140259363 *Mar 10, 2014Sep 18, 2014Kohler Co.Removable header for a shower door track assembly
US20150107171 *Jan 2, 2015Apr 23, 2015Steelcase Inc.Sliding door assembly
USD612517Mar 3, 2009Mar 23, 2010Anthony, Inc.Door
CN102369333A *Mar 29, 2010Mar 7, 2012真好牌制造有限公司A top hung door assembly
CN102369333B *Mar 29, 2010Dec 2, 2015真好牌制造有限公司顶悬门组件
DE8717091U1 *Dec 30, 1987Mar 10, 1988Colora Messtechnik Gmbh, 7073 Lorch, DeTitle not available
EP0059545A1 *Feb 12, 1982Sep 8, 1982Stanley Howard HobbinsA window, a method of reducing condensation of water vapour on a window frame structure and a device for use in the method
EP0220096A1 *Sep 18, 1986Apr 29, 1987Nergeco S.A.Jamb for an industrial door
WO2002001030A1 *Jun 25, 2001Jan 3, 2002Kohler Co.Track mounted doors with snap-fit anti-derailer
U.S. Classification49/70, 312/139.2, 49/425, 49/411, 49/410, 219/218, 219/522, 62/275
International ClassificationF25D23/02
Cooperative ClassificationF25D23/021
European ClassificationF25D23/02A