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Патент USA US2406629

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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.
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