USRE21364E

USRE21364E - Refrigerator

Info

Publication number: USRE21364E
Authority: US
Publication date: 1940-02-20

Description

Feb. 20, 1940- c. E. LIPMAN REFRIGERATOR Original Filed July 18, 1932 2 Sheets-Sheet l @N Q w mw mm @mw u Numb ,J/wz/zforv Y C'WZEL. QQ/Rafa,- @@2655.- M@ @Ji/MMMMMQL @im C. E. L. LIPMAN REFRIGERATOR Feb. 20, 1940.

Original Filed July 1B, 1932 2 Sheets-Sheet 2.

astma Feb. zo, 1940 BEFRIGEBATOR Carl E. L. Lipman,` Kenilworth, Ill.,

ililileane assignments, to Will Freeman,

assignor, by Chicago,

No. 2,076,821, dated April 13, 1937. Serial No. 623,078, July 18, 1932. Application for reissue (lctober 24, 1938, Serial No. 236,828

8 Claims.

This invention relates to refrigerator cabinets and more particularly to those constructed oi' v.sheet metal. Cabinets of this type comprise a sheet metal casing surrounding and spaced from an inner sheet metal shell or lining, both casing and shell having aligned door openings, and the space between the casing and lining being filled with insulation.

It can readily be appreciated that these metallo lic shells increase the diiliculties of assembling and of providing proper insulation, particularly at the door openings where the casing and lining are connected and sealed by some means. Heretofore the edges oi' the casing and lining have 15 been flanged inwardly toward each iother and a breaker strip secured over the inturned flanges. This construction, however, not only places the metal casing and lining edges, which are good heat conductors, in close proximity to each other but places .them in the doorway between the door and the door opening outside of the refrigerated compartment and in heat conductive relation thereto.

It is the purpose of this invention to provide u an improved sheet metal cabinet which, in addition to having structural advantages and being so constructed as to be readily and economically assembled with a minimum amount of labor, provides for adequate insulation throughout the entire box and especially at the door openings, and provides a door'seal.

In accordance with this invention, the outer casing and inner lining are formed each of a single sheet of metal or of separate sheets assembled and so constructed as to permit insertion of the lining into the casing through the door opening ot the latter. The insulation is so sectioned as to permit ready insertion thereof between the casing and lining 'partly before andA partly after inserting the lining into the casing. Furthermore, a novel preferably unitary removable and replaceable combination breaker strip and sealing strip is employed to connect the casing and lining together around the door openn ings and to provide a seal for the door.

A better understanding will be had of my invention from the following description given in connection with the drawings in which:

Fig. lis a longitudinal vertical section through n a cabinet constructed in accordance with this invention;

Fig. 2 is a section taken 2-2 of F1a'. 1;

Fig. 3 is an enlarged detail section through u the cooperating sealing attivi: and

approximately on line Figs. 4 to l0, inclusive, are partial sections through the front wall and doors of modiiied i'orms of construction, each figure representing a slightly different form of this invention.

As can be seen from the drawings, the refrig- 5 erator cabinet comprises an outer rectangular sheet metal casing i having an opening 2 in the top wall thereof through which the refrigerating unit may be inserted and a door opening through the front thereof defined by a flange 3 terminating in a slightly hooked edge 4. Within the casing I is a lining or inner shell 5 which forms the refrigerating compartment. The inner liningis also provided ,with an opening 8 through the top wall thereof which is aligned with opening 2 and with a door opening in the front thereof defined by a iiange 1, parallel to nange 8 and terminating in a hooked edge 8.

The inner lining 5 is small enough to permit the lining to be inserted through the doorway of the outer casing. The lining is oi.' course spaced from the outer shell and the space therebetween is filled with insulation. The insulation is so sectioned into slabs and strips as to permit ready assembly of the insulation and of the entire cabinet. The space Vbetween the top of the lining and the top of the casing is filled with a rear strip of insulation 9, and a front strip 9a, the latter being faced on each side by strips IIJ of wood, composition or other suitable material. Two side strips II complete the insulation of the top of the cabinet. The strips 8, 9, 9a and II are arranged around the periphery of the cabinet so as to leave a central opening through which the refrigerating unit may be inserted. 'I'he space between the side walls of the casing and lining is lled with slabs or panels I2. which extend to the back wall of the casing but not to the front wall thereof. The chamber between the back walls is filled by a slab I3 which lies between the two side panels I2 and holds the latter in place.Y The, space between the two flanges l and 'i is iiiled by strips Il faced with strips IB oi' wood or other suitable material. The space between the bottom walls is filled by a panel I1 which lies between the rear panel I3 and the front lower strip Il holding the latter in place.

,'I'hecasingandliningaresecuredandsealed together at the door openings by a rectangular shaped frame-like breaker strip Il of some nexible, preferably elastic, terial such as rubber. shown in Figs. l, 2 and 3, this combined breaker strip and sealing strip comprises a rectangular 55 frame-like member of integral or sectional structure, the marginal edges of which terminate in inturned hooks or flanges I9 which interlock and grip the hooked edges 4 and 8 of flanges 3 and l. The strip is also provided with a thickened abutment portion 20, which serves as a door stop as will be hereafter described. The breaker strip may be formed entirely of soft rubber or it may be formed of semi-hard or hard rubber having a soft or elastic portion sufficient to enable the strip to be stretched over and interlocked with the edges 4 and 8 of flanges 3 and 'I which dene the door openings through the casing and lining respectively.

The doorway, outlined and defined by strip I8, is closed by a door 2| composed of an outer plate 22 and an inner plate 23 corresponding to the outer casing and inner shell or lining of the cabinet, the space therebetween being filled by a slab of insulation 24. The marginal edges of the metal door sides are joined and sealed by a breaker strip 26 generally similar to strip I 8 and which is preferably formed of rubber and is provided with hooked marginal edges 21 and 28 which interlock and embrace the edges of

plates

22 and 23. Strip 26 is also provided with a bead 29 projecting from the front edge thereof in such a manner as to engage the abutment 28 when the door is closed. The two strips I8 and 26 therefore not only serve as sealing and breaker strips for the casing and lining and door panels but also serve as a sealing strip or gasket for the door. The door is hinged in the usual manner along one vertical edge and is secured in closed position by any suitable latch which preferably includes a door stop, such as a rubber bumper 38, to relieve the sealing and breaker strips of carrying the entire shock.

In Fig. 4 there is shown a slightly modified form of* breaker and sealing strips which may be said to be under compression rather than under tension as on the other forms. The cabinet strip 3| is substantially L-shaped in section and is provided with grooves or slots in opposite faces thereof into which the marginal edges of the casing 33 and lining 34 project, the strip being under compression and thereby held in place. The door strip 32 is substantially Z-shaped in section and is provided with a pair of grooves formed in intersecting faces to receive the outer and

inner panels

36 and 31, respectively, of the door. When thedoor is closed the two strips contact at 38 and provide a door seal or gasket as well as breaker and seal for the cabinet and lining.

In Fig. 5 there is shown another form of cooperating breaker andA

sealing strips

39 and 40 for the cabinet and door respectively. In this form the door opening flanges 4I and 42 of the casing and lining, respectively, terminate in curved edges and the breaker therefor is identical to strip I8, i. e. the strip is provided with curved marginal edges 43 which extend inwardly to provide a pair of grooves to receive curved edges of door opening anges 4I and 42.

The door is formed in a somewhat similar manner, that is, the door opening flanges are curved as at 44 and 46, the former flange being extended across the edge of the door in proximity to the front face thereof. The breaker and sealing strip 4I! is hooked over the two anges 44 and 4G in a manner similar to strip 38 to seal the inner and outer panels of the door. This strip also contacts an abutment portion formed on strip 38 to provide a door seal.

In Fig. 6 there is illustrated a pair of breakers and sealing strips similar to that shown in Fig. 5 with the exception that flange 44 is extended outwardly a little farther beyond the door in order that the sealing strip 4I may be parallel to the door face.

In Fig. 7 the illustrated breaker and sealing strips are substantially the same as shown in Figs. 5 and 6 with the exception that the strip 4| on the door seals against the outer hooked edge of strip 39 instead of a special thickened portion thereon.

In Fig. 8 there is illustrated a slightly further modiiled form of cabinet breaker and sealing strip 49 which is similar to strip 39 with the exception that the thickened abutment portion is disposed at approximately the center of the width of the strip. The door construction is further modified so that the flanges of the door panels terminate approximately in the plane of the door edge rather than the plane of the door face. The door breaker strip 4| is similar to that shown in Figs. 5 and 7 but due to the formation of the door lies parallel to strip 49 rather than to the face of the door.

In Fig. 9 the cabinet breaker strip is similar to that shown in Fig. 8 as is the door strip 4Ia., the latter however is provided with a flange 5| which engages the forward edge of strip 48 whereby a double seal is provided.

In Fig. the cabinet breaker strip is similar to that shown in Fig. 7 but the door breaker strip 52 is of different configuration to conform with the modified door panel structure and is provided with a slot in one edge to receive the inner door panel and a hooked flange 53 to receive the margin of the front door panel. In this instance the front door panel is provided with a curved marginal rim and the strip is similarly shaped to lie thereagainst.

In assembling a refrigerator cabinet, constructed as heretofore described, the outer casing is iirst set up and the rear top insulation strips 9 and 9a and the side strips II are inserted. Side panels I2 are then placed in position followed by the rear panel I3 after which the lower panel I1 is laid in place. The inner lining is then inserted through the doorway after which the front strips I4 and their facings I6 are inserted. The cabinet and lining is then ready to be secured together and sealed by the combined breaker and sealing strip I8 which is stretched over the inturned edges 4 and 8 of flanges 3 and 'I of the doorways in the casing and lining respectively. The door is of course assembled separately and then installed. From the foregoing it will be apparent that the matter of assembling a box, constructed as previously described, is very simple. Substantially no nailing or screwing is required which materially decreases the labor. It is also apparent that the sealing strips constitute a breaker strip which permits wide separation of the metallic portions of the cabinet, namely the casing and lining, and in the preferred form also eliminates any metallic conductive paths between the edge of the door and the door opening through the cabinet as is customary in the standard constructions in which the outer casing and lining are carried into proxlmity at the door openings and covered by a breaker strip. In my construction, particularly in the preferred form, there are no metal or heat conductive parts disposed between the door and the door opening through the cabinet. Furthermore a readily removable and replaceable unitary breaker strip is provided which not only serves as a breaker and sealing strip between the metallic parts of the cabinet and door but serves as a sealing strip or gasket for the door. The terms casing and lining are used broadly to mean the outer and inner walls of either the cabinet proper or the doors to the refrigerator.

It is obvious that minor changes may be made in the details of construction without departing from the spirit and scope of this invention as dened in the appended claims.

I claim:

1. A refrigerator having spaced inner and outer metallic walls provided with a door opening, a door in said opening having spaced inner and outer metallic walls, a pair of non-heat conducting elastic breaker and sealing strips disposed in inter-engaging locking relation with the spaced walls of the cabinet and door, respectively, and covering the space between the respective inner and outer walls, said cabinet and door strips having opposed abutting surfaces adapted when the door is in closed position to cooperate in forming a seal between the cabinet and door.

2. A refrigerator having spaced inner and outer metallic walls provided with a door opening, a door in said opening having spaced inner and outer metallic walls, a pair of non-heat conducting elastic breaker and sealing strips disposed in .inter-engaging locking relation with the spaced walls of the cabinet and door, respectively, and covering the space between the respective inner and outer walls, said cabinet and door strips having a plurality of abutment surfaces adapted when the door is closed to cooperate with companion abutment surfaces of the opposed strip to form a plurality of seals between the cabinet and door.

3. A refrigerator cabinet having spaced inner and outer metallic walls provided with a door opening, the edges of said walls surrounding said opening being bent to form oppositely projecting hooks, and an elastic breaker and sealing strip shaped to interlockingly engage with said Ahooks and form a connection between said walls at the door opening.

4. A refrigerator cabinet having spaced inner and outer metallic walls provided with a door opening, a door therefor having spaced inner and outer metallic walls. the edges of said cabinet and door walls in proximity to said opening being bent to form oppositely proiecting hooks, an elastic breaker and sealing strip shaped to interlockingly engage with said hooks on the cabinet walls and form a connection between 'said walls at the door opening, and an elastic breaker and sealing strip shaped to interlockingly enge with the hooks provided by the walls of the door, the opposed strips on the cabinet and door being provided with abutment surfaces adapted to be brought into cooperative relation upon the closing of the door to form a'seal between the cabinet and the door at said opening.

5. A refrigerator cabinet provided with a door comprising an inner wall having an edge portion, an outer wall spaced from said inner wall and also having an edge portion, heat insulation between the walls, another wall formed of flexible material provided with tongues which form grooves to engage Vsaid edge portions, said latter wall forming a closure for the space between said inner and outer walls, and a'gasket seal flexibly connected to said wall of exible material to provide an air-ogm seal between the inside and the A outside of the cabinet.

6. A refrigerator cabinet having a storage chamber therein provided with a door for closing the chamber, said door comprising an inner wall having anedge portion, an outer wall spaced from said inner wall and also having an edge portion, heat insulation between the walls, a breaker strip forming another exposed wall member and providing a closure for the space between said inner and outer walls, said breaker strip being provided with at least one exible tongue near an edge thereof in which a groove is formed to engage the edge portion of one of said walls, means for fastening the other edge of the breaker strip to the other wall, and a gasket seal exibly and integrally connected to said breaker strip to provide an air-tight seal for said storage chamber when the door is closed.

7. A refrigerator cabinet provided with a wall structure comprising an inner metal wall having an edge portion, an outer metal wall spaced from said inner metal wall and also having an edge portion terminating in widely spaced relation to the edge portion of said inner metal wall, said edge portions of said walls defining a door opening in said wall structure, the edge portion of one of said walls being bent to form a hook extending therealong, a breaker strip composed'at least in part of resilient rubber and having a substantially at wide main body portion bridging the gap between the spaced apart edges of the metal walls and forming a closure for the space` therebetween, saic rubber part of said strip being provided with an integral ilexible portion projecting outwardly from the main body portion thereof near one of its edges and forming a groove to interlockingly engage the hook along the edge of said one metal wall, said rubber part of said strip also being provided with an integral iiexibie portion projecting outwardly from the main body portion thereof near the other of its edges and adapted to interlockingly engage the edge portion of the other metal wall to form a connection between said walls at the door opening.

8. A refrigerator cabinet having a storage chamber therein provided with a door for closing the chamber, said door comprising an inner metal wail having an edge portion, an outer metal wall spaced from said inner wall and also having an edge portion, heat insulation between said walls. the edge portion of one oi said metal walls being bent to form a hook extending therealong, a breaker strip composed at least in part of resilient rubber and having a substantially flat wide main body portion bridging the gap between the spaced apart edges of the metal walls and torming an exposed closure for the space therebetween, said rubber part of said strip being provided with an integral flexible portion projecting outwardly from the main body portion thereof near one ol' its edges and formingy a groove to interlockingly engage the hook along the edge of said one metal wall, said yrubber part of said strip also being provided with an integral flexible portion projecting outwardly from the main body portion thereof near the other of its edges and adapted to interlockingly engage the edge portion of the other metal wall to form a connection between saiddoor walls, and a flexible gasket seal formed integral with said rubber part of said strip and adapted to engage the refrigerator cabinet to provide an air-tight seal for said storage chamber when the door is closed.

CARL E. L. LIPM'AN.