U.S. patent number 3,707,317 [Application Number 05/057,701] was granted by the patent office on 1972-12-26 for cantilever refrigerator shelf.
This patent grant is currently assigned to Admiral Corporation. Invention is credited to Daniel B. Dawley, Roy V. Johnson.
United States Patent |
3,707,317 |
Dawley , et al. |
December 26, 1972 |
CANTILEVER REFRIGERATOR SHELF
Abstract
A refrigeration cabinet having an outer housing formed of sheet
metal or similar material and an inner liner formed of a molded
thermoplastic material. The inner liner is spaced from the outer
housing and the space may be filled with an insulating material.
The inner liner has substantial lateral flexibility and is
generally insufficient to support the weight of refrigerator
shelves. Shelf support members are positioned between the outer
housing and the inner liner. Shelf attachment means such as an
adjustable rack is then positioned against the inner surface of the
molded liner and firmly secured directly to the shelf support
member by means of fasteners which extend through the inner liner
to the shelf support member. In this way, racks may be firmly
supported within the refrigeration cabinet. The entire assembly
gives sufficient rigidity to the shelf racks to support the shelves
in a cantilever manner. In such an arrangement, only two shelf
support means are required. Each of the shelf support means extend
vertically at the rear of the refrigeration cabinet between the
molded liner and the outer housing of the cabinet.
Inventors: |
Dawley; Daniel B. (Galesburg,
IL), Johnson; Roy V. (Galesburg, IL) |
Assignee: |
Admiral Corporation (Chicago,
IL)
|
Family
ID: |
22012224 |
Appl.
No.: |
05/057,701 |
Filed: |
July 23, 1970 |
Current U.S.
Class: |
312/408 |
Current CPC
Class: |
F25D
25/02 (20130101) |
Current International
Class: |
F25D
25/02 (20060101); A47b 081/00 (); F25d
011/00 () |
Field of
Search: |
;312/214 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Gilliam; Paul R.
Claims
We claim as our invention:
1. A refrigerator cabinet having an enclosure with a plurality of
shelves mounted therein at various vertically adjustable positions,
comprising: an outer cabinet formed of sheet-like material having
walls defining walls of said cabinet; an inner plastic liner having
walls defining an enclosure having an access opening on one side,
said inner plastic liner being disposed in said cabinet with the
walls of the liner spaced from the walls of the cabinet; a pair of
spaced apart shelf support members extending vertically and
positioned between the outer cabinet wall and the walls of the
inner plastic liner, said support members having a central portion
and a flange on each longitudinal edge thereof and being firmly
secured to the wall of the inner plastic liner to rigidify the wall
of the inner plastic liner at points immediately adjacent to said
shelf support members, a shelf attachment member positioned on an
inner surface of a wall of said liner and overlying each of said
shelf support members and secured to said shelf support member
through the liner wall at said flanges, each of said shelf
attachment members having means for removably mounting shelves in
various vertical positions in said enclosure, a plurality of
shelves removably carried by said shelf attachment members, and
said shelves being supported on cantilever arms carried by said
shelf attachment members which are mounted on a wall of the liner
facing said access opening.
Description
BACKGROUND OF THE INVENTION
Field of the Invention
The field of art to which this invention pertains is refrigeration
cabinets and in particular to means for supporting refrigeration
shelves in a refrigeration cabinet having a molded plastic inner
liner.
SUMMARY OF THE INVENTION
It is a principal feature of the present invention to provide an
improved refrigeration cabinet.
It is another feature of the present invention to provide a
refrigeration cabinet having improved shelf means wherein the
cabinet may incorporate a molded thermoplastic inner liner.
It is a principal object of the present invention to provide an
improved shelf support means for a refrigeration cabinet.
It is another object of the present invention to provide a
combination of a refrigeration cabinet having a molded
thermoplastic inner liner and having cantilever type supported
shelves.
It is a further object of the present invention to provide a
refrigeration cabinet having a molded plastic liner and having
shelf support means positioned between the molded plastic liner and
the outer housing of the cabinet wherein rack attachment means for
shelves may be secured through the inner liner directly to the
shelf support means.
It is an additional object of the present invention to provide
shelf support means as described above which comprise elongated
members having a first flange secured to the outer cabinet housing
and a second flange secured to a rack attachment means adjacent the
inner plastic liner.
It is also an object of the present invention to provide a
refrigeration cabinet of the type described above wherein thermal
break shims are positioned between the shelf support means and the
outer wall of the cabinet.
These and other objects, features and advantages of the invention
will be readily apparent from the following description of a
certain preferred embodiment thereof, taken in conjunction with the
accompanying drawings, although variations and modifications may be
effected without departing from the spirit and scope of the novel
concepts of the disclosure.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is an elevational view of a refrigeration cabinet according
to the present invention having some portions thereof cut away to
illustrate the internal construction thereof.
FIG. 2 is a sectional view taken vertically through one of the
shelf support means shown in FIG. 1, and
FIG. 3 is a portion of a horizontal section taken through the
refrigeration cabinet of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT
This invention relates to a refrigeration cabinet and particularly
relates to a refrigeration cabinet of the type having a molded
plastic inner liner. With the advent of the molded plastic inner
liner and many of its desirable features, the problem of suitably
mounting shelves within the refrigeration cabinet has required
considerable engineering development, and the present invention is
directed to providing an improved means for mounting shelves in
such a cabinet.
In earlier refrigeration cabinets having metal inner liners,
refrigeration shelves have been mounted by a variety of techniques
most of which have shelf support means attached directly to the
metal liner. While plastic liners have many advantages, and in
particular are believed to be more sanitary than metal liners,
plastic liners do not have the lateral stiffness required to
support a shelf over a period of time, especially when heavily
loaded as is likely to be the case in a household refrigeration
cabinet.
The present invention solves the problem of mounting a shelf in
such a refrigeration cabinet even when the shelf is mounted in a
cantilever manner which, in effect, increases the loading on the
point of attachment to the wall as compared to other forms of shelf
mounting arrangements.
The present invention provides the required stiffness for the
refrigeration liner by interposing a shelf support means between
the outer cabinet wall and the inner plastic liner. The shelf
support means may take the form of an elongated metal beam having a
first flange secured to the outer cabinet wall and a second
oppositely disposed flange secured directly to a shelf rack which
is mounted against the inner liner. In this way the inner liner is
given the required lateral stiffness in the immediate vicinity of
the shelf racks. In this way, adjustable shelf racks may be used,
and cantilever shelves may be adequately supported without danger
of cracking or deformation of the inner cabinet liner.
Referring to the drawings in greater detail, FIG. 1 shows a
refrigeration cabinet 10 according to the present invention. The
cabinet 10 has an outer cabinet wall or outer housing 11 and an
inner plastic liner 12. The inner liner 12 is spaced from the outer
wall 11, and the space may be filled with a suitable insulating
material such as fiberglass or the like. Since the inner liner 11
is molded, a continuous smooth surface is provided at the entire
inner surface 13 of the cabinet. Accordingly, a more sanitary, more
readily cleaned refrigeration cabinet is provided.
A refrigeration shelf 14 is shown mounted within the interior of
the cabinet 13. The shelf 14 is mounted in a cantilever manner.
Shelf support arms 15 are shown in FIG. 2 as having a pair of
fingers 16 and 17 which may be received in slots 18 and 19 which
are formed at spaced intervals in a pair of racks 20 and 21. The
racks 20 and 21 are positioned vertically at the rear wall 22 of
the cabinet 10. By this arrangement, the shelf 14 may be moved
upwardly or downwardly by simply lifting the shelf arms out of
their respective positions in the racks 20 and 21 and repositioning
them at a desired location.
As is well understood, cantilever supported shelves increase the
torque at the point of attachment to the wall 22. This increase in
torque is compared, for instance, to a shelf support arrangement
which provides supporting means both at the rear and at the forward
edge of the shelf. Many proposals have been made for providing
means to support the racks 20 and 21 within the molded liner.
However, the present invention provides a unique solution which is
inexpensive to assemble and which provides the required support for
the shelf racks at the entire length of the racks.
The support for the racks 20 and 21 are provided by a pair of shelf
support means 23 and 24 which are positioned between the outer
cabinet wall 11 and the inner liner rear wall 22.
As shown in FIG. 3, the shelf support means 23 and 24 have a
generally C-shaped cross section and have a first flange 25 which
generally is supported against the rear cabinet wall 11 and a
second flange 26 which is secured directly to the shelf racks 20
and 21.
The means of attachment of the shelf racks to the shelf support
means is shown generally in FIG. 2. Clearance openings 27 and 28,
for instance, are provided in the inner liner 22 and shelf rack
spacers 29 and 30 are fixedly positioned between the shelf rack 20
and the flange 26 of the shelf support means 23. The racks, such as
the rack 20 is then secured to the shelf support means by a series
of screws 30 and 31. The shelf rack spaces provide improved
rigidity of the U-shaped shelf racks and allow the base of the
shelf racks to bear directly against the adjacent flange of the
shelf support means.
The opposite flange 25 of the shelf support means 23 is secured to
the outer wall 11 by means of a series of sheet metal screws 32. A
thermal shim 33 may be provided between the outer wall 11 and the
flange 32 to improve the insulating qualities of the refrigeration
cabinet.
In this way, a refrigeration cabinet having a molded plastic liner
may also incorporate adjustable refrigeration shelves and may even
incorporate cantilever type shelves as described above. The entire
assembly provides an easily cleaned inner surface for the
refrigerator cabinet and yet provides the required rigidity for
normal loading of shelves.
* * * * *