Патент USA US2406629код для вставки
Aug. '27, 1946. c. F. PETKWITZ 2,4o6,629 REFRIGERATING APPARATUS Fi?e'd Oc't. '7, 1944 INVENTOR. m: 4 rra RNÂ' n', Patented Aug. 27, 1946 2,406,629 UNITED STATES PATENT .OFFICE ä Carl F. Petkwit?'ña'yton, Ohio, assignor to Gen- ' y eral Motors Corporation, Dayton, Ohio, a cor poratíon of Del-aware Aínplžcation October 7, 1944, 'Serial No. 551567 2` Claims. 11 _ ( Cl. 20-35 ) 2 e This invention relates to refrigerator cabinets and particularly to' a› door constructioní for such by a novel clamping o'r securing together of walls cabinets. with respect to- the clamping or securing means, so that a portion thereof conceals the door; wall or elements of the'door and to arrange the seal, ' While I am aware of the fact that many dif ferent seals. and arrangements for securing the seal to'a door- oi a refrigerator cabinet for sea] ing engagement with the cab?'net are in exist- i clamping or securing together means from View. Further objects and advantages of the present invention will ber apparent from the following description, reference being had to the` accom panying drawing, wherein a preferred form of ance, these known structures are not entirely satisfactory. Some of these door structures are complicated and: expensive to manufacture and 10 the presentinventicn is clearly shown. the arrangements for' looking or securing a seal thereto have various disadvantages. For ex ample, refrigerator' cabinet doors having a seal In the drawing: _ Fig. I is a front View of' a refrigerator cabinet ' having my invention embodied therein and show extending, therearound and Secured thereto at spaced apart points by screws or other securing ing a portion of the cabinet door broken away; Fig. 72' is a fragmentary enlarged cross-sec means necessitate punching of a pluírality of holes along the seal through. which the screws may tional View taken on the line_ _2-2 of Fig. 1; and Fíg. 3 is a fragmentary enlarged View of an pass. Due to variations in the distance between inner-edge portion of the refrigerato?' cabinet the holes punched in the seal and. also variations door taken on the line 3-3 of Fig. 2. in the distance between holes in the door walls 20 Referring to. the drawing, for illustrating the or pans, the seal buckles intermediate certain screw holes and is stretched intermediate certain other screw holes. This prevents the seal from . lying uniformly ?at around all sides of the door inventic?n, I have shown in Fig. 1 thereof a re `frigerator cabinet of' the household type generally designated by the reference character ?n. Cab inet 110, includes a metal exterior shell or panel and necessitates tightly latching the door to the 25 H' and an interier metal liner !2 forming walls cabinet, in order to properly seal entirely around' of a food' storage compartment or chamber |3 the door opening„ and thereby places undue pres within the cabinet. Any suitable or 'd-esirable in sure on the seal which shortens its life. In ad' sul'ating material !tis disposed between the liner dition to this di?iculty, it has been found that l'2: and walls Il of the cabínet (see Fig. 2). An the cost of producing such seals. can be. -g?reatly 30. evaporator or cooling element |5 of a conven reducecl by eliminatíng the operation of punching tional 'refrigerating system is mounted in the holes therein. i upper part of compartment [3 for cooling and One of the objects of my' invention' is to im causing circnlation of air therein. A frameless prove and simplify the Construction and assembl door, generally ' represented' by the reference ing of a refrigerator cabinet door_ to thereby re 35 character l`6, normally cl'oses an opening in- the duce manufacturing costs while at the_ same timer frontwall of cabinet I ll' and providesaccess to increasing the structural strength of the` simpli the interier of 'food storage compartment [3. A ?ed door construction. ' door !1 may› close or cover another opening in Another object of my invention is to provide an improved method of and Construction for lock the front wall of cabinet ill leading to a com 40 partment which houses the refrigeratíng mech ing a seal element to a refriglerator cabinet door. A further object of ?my inVentio-n is* to secure walls of a refrigerator cabinet door together' at a point adjacent a sea-1 on` the door and to pro anism, operatively connected' with evaporator !5. The food compartment door !8 is provided. with . a sealelement adapted to engage the front wall of cabinet [a about the access opening of food > Vide an arrangement for locking the seal upon. 45 ccmpartment t3, and my invention is particularly the door solely by walls thereof; in a, manner to cause the rseal to lie'uni-formly ?at against the door entirely therearound tocausethe seal to engage the cablnet; with substantially the same scaling pressure throughout the distance around its door opening. More speci?cally, my invention contemplates l the locking of a seal against accidental removal from a refrigerator cabinet door, without pass ing screws or other securing means. thereth-rough„ 55 directed to this element› and the method of securing or looking same upon the door struc ture LG'. _In the- present disclcsnre, door te ccmprises a 'sheet metal wall form?'ng member ZI, shaped to provide› the front face or wall and' sides of the door, a non-metallic pan or wall forming member 22 shaped to. provide the niher-wall of the door and suitable insulating material 23` dis posed in the chamber therebetween (see Fígi. 2) . 2,4oc,629 A stood that during the assembly of pan member 22 upon member 2l, the edges 29 of pan member 3 A flange 24 is turned inwardly on the sheet metal member 2l from the sides thereof in spaced re lation to the front face of door [6. This ?ange 22 are slipped or moved into the groove or open 24 is depressed or dented inwardly in a direc tion toward the front of door IS, as at 25 and 26, to provide walls of a groove or channel 21 ing of the book-like portion 36 of the seal ele ment. This looks the seal element upon the door and the edge portion 29 of pan member 22 is extending around the inner-face of door 16 ad tightly ccmpressed, by the screws 3l, against jacent the sides thereof. the hook portion 36 of the seal element to thereby prevent removal thereof from the channel 21. The channel 21 in ad dition to increasing the structural strength of It will be seen that I have provided a simpli?ed door [6, after assembly of elements therecf to 10 refrigerator cabinet door Construction and have gether, also prevents twisting of the door mem_ provided a novel structure for and method of clamping a seal element thereto without the necessity of passing screws or other securing nel 21 in door member 2! provides a counter sunk mounting space for receiving a, portion of 15 means through the element. By virtue of the improved Construction, the securing means "for a seal to be attached to the door IE. The inner the scaling element and for the door pan mem pan member 22 of door IB may be formed of any bers are concealed to thereby render the door suitable insulating material such as the glass neat in appearance. My improved Construction like polystyrene moulded from a powder obtain ~able on the market under the name "Styroni' 20 eliminates buckling and/or stretching of the seal element at certain points around the door and This door pan member may be painted to match permits the seal to lie uniformly flat against the the color of the interier ?nish of the food stor inner-face of the door so that all portions of age compartment !3. Door pan member 22 is the seal will engage the front of the cabinet with provided with a ?ange 28 which terminates in a bent edge portion 29 disposed within the chan 2% substantially the same sealing pressure entirely around the door opening. Also by virtue of the nel 21 formed in ?ange 24 of a door member 2l. depression in the ?ange on the metal door pan The ?ange 28 on door member 22 registers with or member, the structural strength of the simpli or abuts against the innermost portion of ?ange 24 on door member 2! to form the closed cham- í ?ed Construction is materially increased to there ber in which the door insulation 23 is disposed. 30 by render it unnecessary to provide other or ad ditional metal re-enforcing or frame forming ele A plurality of securing means such as screws 3l, ments within the door structure. preferably of the self-tapping variety, pass While the form of embodiment of the inven through holes provided in the ?ange 28 of pan tion as herein disclosed constitutes a preferred member 22 and thread themselves into holes pro_ vided in door member 2! to secure the door wall 35 form, it is to be understood that other forms might be adopted, as may come within the scope forming members 2| and 22 in assembled rela ber 2| during the process of baking a vitreous enamel coating thereon. Furthermore, the chan tion to one another. The screws 3| are arranged in spaced apart relation, as shown in Fig. 3 of of the' claims which follow. i r element Secured to the peripheral inner portion What is claimed is as follows: 1. A door for a refrigerator cabinet comprising, an inner wall forming member and an outer wall forming member providing a chamber therebe of door |6 includes a hollow resilient bead or tween, insulating material within said chamber, cushion portion 35 adapted to sealing by engag said outer member having a ?ange portion there the drawing, around all sides of the door I 6. An extruded rubber or the like seal or seal 41) ing the metal cabinet wall ll at the front of 5' V on extending inwardly from sides of the door in the cabinet around the food compartment access opening closed by door IS. The seal element also includes a compressible portion 35 formed inte gral with the cushion portion 35 thereof and disposed within the con?nes of the channel 21 " around the door. Portion 36 of the seal element is formed into a hook-like shape in cross section for a purpose to be presently described. The spaced relation to the front thereof, said inner member having a ?ange portion thereon over lapping and abutting the ?ange portion on said outer member, means for securing the overlap ping and abutting ?ange portions in direct con tact with one another, a seal element for said door including a resilient sealing portion adapted to engage the cabinet and an integral mounting seal element furthermore, includes a flexible lip portion abutting said ?ange portion on said outer portion 31, extending laterally from the scaling bead or cushion portion 35 thereof, and lying 'I member, said seal element having a hook-like over the flange 28 and consequently the heads of screws 3! to conceal them from View. In assembling the door structure of the pres ent disclosure, the seal element is placed in posi tion around the door member 2I with the hook like portion 35 thereof disposed in the channel said ?ange portion on said inner wall forming member having an offset peripheral part sub stantially conforming to and ?tting over said ? hook-like part of said seal element, and said securing means engaging said members to clamp said seal element mounting portion therebetween 21. The ?exible lip 31 Of the seal element is bent back over the cushion portion 35 thereof and the door pan 22 is placed in cooperation with the door member 2l with the flanges 24 and 28 registering with one another and with the insu lating material 23 disposed in the chamber be tween* the door wall forming members. The screws 3! are placed in position to ?rmly secure the ñanges 24 and 28 and consequently the door whereby said seal element is locked to the door. members 2! and 22 respectively together. Lip 31 on the seal element is then released and its resiliency causes it to move against the flange 28 on pan member 22 to thereby cover and con ceal the heads of screws 3I. It is to be under part formed in the mounting portion thereof, `: 2. A door for a refrigerator cabinet comprising, " an inner wall forming member and an outer wall forming member providing a chamber therebe tween, insulating material within said chamber, said outer member having a flange thereon ex tending inwardly from sides of the door in spaced ` relation to the front thereof, said ?ange _having a portion intermediate the edge thereof and a side of the door depressed in a direction toward the front of the door to provide ,a channel around said door, said inner member having a, ?ange thereon overlapping and abutting that por tion of the fiange on said outer member inwardly 2,4o6,629 5 6 of said depressed channel, means for 'securing the overlapping and abutting ?ange portions of said eral part offset toward. the base of said channel substantially conforming to and ?tting over said members in direct contact with one another, a seal element for said door including a resilient hook-like part of said seal element, and said se curing means engaging the ?ange portion of .scaling portion adapted to engage the cabinet 5 said members inwardly of saiddepressed channel and an integral inounting portion disposed in the to clamp said seal element mounting portion in channel around said door, said seal element hav the channel whereby said seal element is locked ing an inwardly directed hook-like part formecl to the door. in the mounting portion thereof, said ?ange on said'inner wall forming member having a periph- 10 C'ARL F. PETKWITZ.