|Publication number||US2858408 A|
|Publication date||Oct 28, 1958|
|Filing date||Oct 25, 1957|
|Priority date||Oct 25, 1957|
|Publication number||US 2858408 A, US 2858408A, US-A-2858408, US2858408 A, US2858408A|
|Inventors||Barroero Louis F|
|Original Assignee||Barroero Louis F|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (9), Referenced by (74), Classifications (11)|
|External Links: USPTO, USPTO Assignment, Espacenet|
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,
.,-.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
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1561290 *||Apr 6, 1925||Nov 10, 1925||A C Wicke Mfg Company||Cover plate for display cases|
|US1894205 *||Apr 23, 1931||Jan 10, 1933||C V Hill & Co Inc||Means for preventing frosting or condensation of moisture on glass or other surfaces|
|US2400168 *||Mar 24, 1942||May 14, 1946||Roach Charles J||Refrigerator defroster|
|US2460469 *||Dec 7, 1946||Feb 1, 1949||Frex O Mat Corp||Refrigerator having a door heating device|
|US2515294 *||Jun 18, 1947||Jul 18, 1950||Us Rubber Co||Freezing unit defroster|
|US2690585 *||Apr 13, 1948||Oct 5, 1954||Nordahl Andrew||Hanger for showcase doors|
|US2701395 *||Mar 31, 1954||Feb 8, 1955||Barroero Louis F||Refrigerator door|
|US2731804 *||Jun 11, 1954||Jan 24, 1956||Frost preventer for freezer doors|
|US2811406 *||Jan 25, 1956||Oct 29, 1957||Amana Refrigeration Inc||Gasket|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3008380 *||Sep 30, 1959||Nov 14, 1961||Cowley Richard T||Waterproof gun cover|
|US3014250 *||Jun 22, 1959||Dec 26, 1961||Rolscreen Co||Door structure|
|US3038319 *||Feb 26, 1958||Jun 12, 1962||Gen Motors Corp||Heated refrigerator door seal|
|US3055193 *||Nov 14, 1958||Sep 25, 1962||Gen Motors Corp||Refrigerating apparatus|
|US3064110 *||Feb 19, 1960||Nov 13, 1962||R M P Ind Ltd||Heated frame element for door and window constructions|
|US3064539 *||May 22, 1959||Nov 20, 1962||Cowley Richard T||Sealing arrangement for a pivoted closure|
|US3066212 *||Jul 21, 1960||Nov 27, 1962||Gen Electric||Thermal isolation of oven liner|
|US3074124 *||Jul 1, 1959||Jan 22, 1963||John E Bergstedt||Display refrigerator doors|
|US3075255 *||Aug 4, 1958||Jan 29, 1963||Taubman Samuel||Rolling panel closure means|
|US3115020 *||Jun 26, 1961||Dec 24, 1963||Gen Motors Corp||Refrigerating apparatus|
|US3122891 *||Dec 11, 1958||Mar 3, 1964||Air Prod & Chem||Cryogenic methods and apparatus|
|US3135100 *||Oct 23, 1961||Jun 2, 1964||Hopkins Fortescue W||Apparatus for preventing freeze-up of refrigerator doors|
|US3177989 *||Dec 12, 1962||Apr 13, 1965||Di Chiaro Joseph A||Refrigerator door construction|
|US3401994 *||Mar 27, 1967||Sep 17, 1968||Arthur G. Diack||Overhead track and lock assembly for showcases|
|US3440767 *||Oct 20, 1966||Apr 29, 1969||Umc Ind||Glass lid for refrigerated merchandising cabinet|
|US3462885 *||Oct 17, 1967||Aug 26, 1969||Miller Bros||Safety edge for a door|
|US3508361 *||Nov 29, 1968||Apr 28, 1970||Ardco Inc||Sliding door assembly|
|US3628289 *||May 25, 1970||Dec 21, 1971||Beverage Air Co||Sliding door construction|
|US3673735 *||Dec 31, 1969||Jul 4, 1972||Ardco Inc||Glass panel refrigerator door|
|US3702521 *||Sep 18, 1970||Nov 14, 1972||Hager & Sons Hinge Mfg||Closet construction|
|US3742814 *||Jul 6, 1971||Jul 3, 1973||Us Navy||Frangible cover assembly for missile launchers|
|US3854165 *||May 14, 1973||Dec 17, 1974||Arizona Glass & Mirror||Panel door assembly|
|US3859502 *||Feb 11, 1974||Jan 7, 1975||Anthony S Mfg Co||Defrosting system for refrigerator doors|
|US4004370 *||Mar 3, 1975||Jan 25, 1977||Anthony's Manufacturing Company, Inc.||Insulated door mounting frame structure|
|US4080756 *||Oct 9, 1975||Mar 28, 1978||Anthony's Manufacturing Company, Inc.||Insulated refrigerator door frame|
|US4127765 *||Feb 17, 1978||Nov 28, 1978||Anthony's Manufacturing Company, Inc.||Anti-condensation system for refrigerator doors|
|US4213029 *||Feb 21, 1979||Jul 15, 1980||The United States Of America As Represented By The Secretary Of The Navy||Radiation transmissive housing having a heated load bearing gasket|
|US4380265 *||Feb 23, 1981||Apr 19, 1983||Mohaupt Henry H||Method of treating a hydrocarbon producing well|
|US4520602 *||Aug 3, 1981||Jun 4, 1985||Thermetic Glass, Inc.||Multi-pane sealed window and method for forming same|
|US4588235 *||Sep 7, 1984||May 13, 1986||Barroero Louis F||Refrigerator door structure|
|US4776379 *||Sep 25, 1986||Oct 11, 1988||Nergeco||Riser for a vertically-opening door|
|US4792659 *||May 22, 1987||Dec 20, 1988||Thomas Paul H||Garage door opener heater|
|US4855567 *||Jan 15, 1988||Aug 8, 1989||Rytec Corporation||Frost control system for high-speed horizontal folding doors|
|US4936049 *||Jun 26, 1989||Jun 26, 1990||Hansen Leslie N||Airtight door|
|US4950869 *||Oct 19, 1988||Aug 21, 1990||Rytec Corporation||Frost control system for high-speed mechanized doors|
|US5246053 *||Aug 26, 1991||Sep 21, 1993||Nergeco||Riser for a vertically-opening door|
|US5269154 *||Jul 17, 1992||Dec 14, 1993||Whirlpool Corporation||Heated ice door for dispenser|
|US5338109 *||Jan 15, 1993||Aug 16, 1994||Raymond Haines||Hand gun safety storage cabinet|
|US5351442 *||Aug 27, 1992||Oct 4, 1994||Gingras Jean Pierre||Door closure for refrigeration housing|
|US6226995||Jun 15, 1999||May 8, 2001||Rytec Corporation||Frost control system for a door|
|US6324853 *||Sep 28, 2000||Dec 4, 2001||Spx Corporation||De-icing for low temperature refrigeration devices|
|US6381904 *||Jun 27, 2000||May 7, 2002||Kohler Co.||Track mounted bath doors with clip anti-derailer|
|US7259359 *||Jun 15, 2005||Aug 21, 2007||Commercial Refrigerator Door Company, Inc.||Automated glass entrance door assembly for walk-in coolers|
|US7340907||May 9, 2005||Mar 11, 2008||Computer Process Controls, Inc.||Anti-condensation control system|
|US8297334 *||Sep 25, 2006||Oct 30, 2012||Chen-Ho Chu||Sliding panel|
|US8402695||Mar 26, 2013||Magna Mirrors Of America, Inc.||Heated rear slider window assembly|
|US8613161||Aug 20, 2008||Dec 24, 2013||Anthony, Inc.||Refrigerator door construction including a laminated package|
|US8881458||Sep 14, 2011||Nov 11, 2014||Magna Mirrors Of America, Inc.||Slider window assembly|
|US8915018||Dec 21, 2011||Dec 23, 2014||Magna Mirrors Of America, Inc.||Slider window assembly|
|US8938914||May 10, 2013||Jan 27, 2015||Magna Mirrors Of America, Inc.||Slider window assembly with cable guides|
|US8955271||Sep 17, 2013||Feb 17, 2015||Steelcase Inc.||Sliding door assembly|
|US9174515||Dec 17, 2014||Nov 3, 2015||Magna Mirrors Of America, Inc.||Method of assembling a slider window assembly|
|US9234376 *||Mar 26, 2010||Jan 12, 2016||True Manufacturing Co, Inc.||Top hung door assembly|
|US9242533||Oct 30, 2014||Jan 26, 2016||Magna Mirrors Of America, Inc.||Slider window assembly|
|US20050183442 *||Feb 24, 2005||Aug 25, 2005||Hygema Terry L.||Heated ice door|
|US20050268627 *||May 9, 2005||Dec 8, 2005||Vogh Richard P Iii||Anti-condensation control system|
|US20060236613 *||Feb 14, 2006||Oct 26, 2006||Ewing K B||Thermally broken hanging panel system|
|US20060277850 *||Jun 8, 2005||Dec 14, 2006||Gravel Donald P||Partition panel assembly|
|US20060283850 *||Jun 15, 2005||Dec 21, 2006||Jerry Davey||Automated glass entrance door assembly for walk-in coolers|
|US20070033874 *||Aug 12, 2005||Feb 15, 2007||Home Decor Holding Company||Concealed top track system for sliding doors|
|US20070261799 *||Sep 25, 2006||Nov 15, 2007||Chen-Ho Chu||Sliding panel|
|US20100043293 *||Aug 20, 2008||Feb 25, 2010||Anthony, Inc.||Refrigerator door construction including a laminated package|
|US20100242370 *||Sep 30, 2010||Trulaske Sr Steven L||Top hung door assembly|
|US20110030276 *||Feb 10, 2011||Magna Mirrors Of America, Inc.||Heated rear slider window assembly|
|US20120305538 *||May 31, 2012||Dec 6, 2012||Thomas Lund||Condensation reduction system for aluminum windows|
|US20140259363 *||Mar 10, 2014||Sep 18, 2014||Kohler Co.||Removable header for a shower door track assembly|
|US20150107171 *||Jan 2, 2015||Apr 23, 2015||Steelcase Inc.||Sliding door assembly|
|USD612517||Mar 23, 2010||Anthony, Inc.||Door|
|CN102369333A *||Mar 29, 2010||Mar 7, 2012||真好牌制造有限公司||A top hung door assembly|
|CN102369333B *||Mar 29, 2010||Dec 2, 2015||真好牌制造有限公司||顶悬门组件|
|DE8717091U1 *||Dec 30, 1987||Mar 10, 1988||Colora Messtechnik Gmbh, 7073 Lorch, De||Title not available|
|EP0059545A1 *||Feb 12, 1982||Sep 8, 1982||Stanley Howard Hobbins||A 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, 1986||Apr 29, 1987||Nergeco S.A.||Jamb for an industrial door|
|WO2002001030A1 *||Jun 25, 2001||Jan 3, 2002||Kohler Co.||Track mounted doors with snap-fit anti-derailer|
|U.S. Classification||49/70, 312/139.2, 49/425, 49/411, 49/410, 219/218, 219/522, 62/275|