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Патент USA US3041135

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June 26, 1962
2 Sheets-Sheet 1
Original Filed July 20, 1954
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June ze, 1962
Original Filed July 20, 1954
2 Shee‘ts-Shee‘l'I 2
„.__ 202 „a
4@ @Zelf/1 Milf/f4?
United States
Patented June 26, 1962
and issued August 30, 1960 as Patent No. 2,950,911, and
is assumed to be equipped with similar operating mech
anism for the two main doors. The lower portion of the
Glenn Mailly, 1541 ‘Crestview Drive, Springfield, Ohio
Original application July 20, 1954, Ser. No. 444,422, now
Patent No. 2,866,322, dated Dec. 30, 1958. Divided
cabinet, including the freezer drawer, is similar to my
patent U.S. 2,709,343, issued May 3l, 1955- and patent
and this application Apr. 28, 1958, Ser. No. 731,300
1 Claim. (Cl. S12-_296)
U.S. 2,765,633, issued October 9, 1956, but shows an
improved form of freezer drawer and its gasket.
This is a division of my copending application Serial
No. 444,422, ñled July 20, 1954, now Patent No. 2,866,
322, issued December 30, 1958, and the invention relates
mechanism usually comprising three channel members
The freezer drawer 162 is mounted on a roller slide
of which one is ñXed to the cabinet, one lixed to the
drawer and one floating between on rollers. The usual
to a new type of refrigerator and to controls of refrigera
“hump” which lifts and retains the drawer in closed posi
tion is here duplicated at the full open position. It will
References are made in this specification directly or
be seen that when switch 138 is closed it also completes
indirectly to some of my U.S. patents and pending appli 15 the circiut through switch 166 and motor 164, which is
cations listed below:
preferably back-geared to the shaft 190 carrying the
tors having both freezers and ice makers.
sprocket wheel 192 in such a rnanner as to be reversible.
2,709,343 issued May 31, 1955, appl. S.N. 74,528
2,765,633 issued Oct. 9, 1956, appl. S.N. 178,498
2,894,374 issued July 14, 1959, appl. S.N. 464,041
2,942,432 issued June 28, 1960, appl. S.N. 552,530
Upon energizing of motor 164 the shaft 190 is rotated
clockwise, moving the inclined belt or chain 194 to carry
20 the lug 196 against the bracket 198 mounted upon the
rear of the drawer 162 and extending to the far (left)
side of the drawer into the path of the lug 196. This
The present application discloses a number of improve
pushes the drawer in the opening direction on the roller
ments over the inventions of these earlier patents and
slide mechanism of which outer channel 200, ñxed to the
applications and is directed mainly to a new type of 25 outer shell of the cabinet, provides the track for the float
household refrigerator having a separately insulated,
ing member 202 which carries rollers supporting the
automatically defrosted freezer combined with a non
track 203 attached to drawer 162. This action first
freezing food storage space in which there is an automatic
pushes the drawer off of the “humps” of 203 which lift
ice-maker, with co-related control of all three. Some
the drawer as it closes, letting it drop to the position
of the objects of this invention are:
30 162’. Further chain travel pushes the drawer to the
To provide improved automatic means for defrosting
nearly full open position 162”, where the drawer is
the evaporator of the freezer of such a refrigerator with-t
slightly elevated above its closed position by virtue of
out wetting the frozen foods stored therein.
the inclined track 200 on which it is guided and supported.
To provide for dissipating defrost water from the evap
At this point 162”, the second lug 204 strikes the stop
orator of the ice maker and defrost water from the
206, which is welded to the far (left) side of the outer
freezer evaporator while preventing such water from
shell of the cabinet and thereby causes `the motor 164 to
contaminating the water to be frozen in making ice.
stall, the motor being designed to stand such a locked
To provide a drawer-type freezer with a new form of
rotor condition for the required length of time. The
gasket and mechanical means for freeing the gasket from
motor remains stalled, holding the drawer open at posi
contacting surfaces to which it may be frozen.
40 tion 162", during the few minutes required to defrost the
To provide a safety device which illuminates the freezer
freezer evaporator. Defrost water thus falls into the
drawer when opened for defrosting of its evaporator.
heavy metal pan 130 which forms the main base of the
To provide an improved automatic defrosting system
cabinet instead of falling onto the frozen foods in the
for the freezer of a two-zone refrigerator.
With this and other objects in view, I now describe the
drawings as follows:
FIG. l is a vertical sectional view of a refrigerator
freezer cabinet showing a system installed therein and
including the wiring diagram.
drawer. Upon completion of the defrost period of pre-.
determined length the switch 138 reopens, stopping the
heating of coil 156 and deenergizing the motor 164,
whereupon cooling of evaporator 144 resumes and the
drawer recio-ses under the influence of gravity due to
the inclination of the track upon which it is carried by
FIG. 2 is a horizontal sectional view of FIG. l taken 50 rollers. This inclination is sufficient to cause the inertia
on the line 2--2 thereof.
of drawer reclosure to lift the drawer 4from the position
FIG. 3 is a bottom view of the gasket which seals the
162’ vto the fully-closed position 162 in which it is shown
freezer drawer, taken on the line 3_3 of FIG. 1.
by solid lines.
FIG. 4 is an enlargement of a portion of FIG. l, show
When the cam 142 makes one revolution per twenty
ing the gasket with drawer closed,
55 four hours the switch 138 closes once a day, preferably
FIG. 5 shows the same gasket after the drawer has
at two or three o’clock in the morning, when it will not
started its opening movement.
interfere with normal operations in the kitchen, but as a
FIG. 6 shows the same gasket as it is contacted and
safety precaution in the event that someone cornes into
bent by the opposite (rear) wall of the drawer while the .
the kitchen in the dark and might fall over the open
drawer is held in its fully open position.
60 drawer, I have provided the switch 160, which is located
FIG. 7 shows the roller slide mechanism supporting
on the far side of the drawer in hidden position, to be
the drawer 162 and mainly hidden back of it in FIG. l.
closed when the drawer is part way open and remain
FIG. 8 is an end view, partly in section, of the roller
closed until the drawer is nearly closed, thus causing the
slide mechanism of FIG. 7.
lamp 158 to be lighted whenever the drawer is opened,
FIG. 9 is a broken view of the same roller slide mech
65 either automatically or by hand.
anism, but extended as when the drawer is fully open.
Since it is not normally necessary to defrost the
FIG. 1 is a vertical sectional view of a household re
freezer evaporator at such short intervals as one day, the
frigerator of the two-zone type, showing-location of the
wiring is so arranged that the defrosting occurs only
ice maker with diagram of the wiring system. The type
when the control 124 is in position to allow the freezer to
of cabinet shown is that of my copending U.S. applica 70 operate. Thus the defrosting will be more frequent when
tion Serial Number 235,920, ñled July 10, 1951 of which
continuation S.N. 705,157 was íiled December 26, 1957
the freezer is being cooled more frequently, thereby in
' creasing the probability of a defrost. If during the night
the freezer control is “on” one-eighth of the time the
freezer evaporator will be defrosted about once in eight
days. On other nights the drawer will not be mechani
cally openend nor the defrost heater energized. Since it
should not normally be required to defrost the freezer
oftener than once a month, this provision is ample. At
the end of each freezer defrost the bulb 172 will be
warmer than usual, which means that the cooling of the
freezer will always continue after the defrost until the air
rising from the drawer through the flue 182 is` again down
to the cut-out temperature.
In case a seven-day or a
thirty-day shaft is used to drive the cam 142 the wiring
can be changed to cause a defrost each time the switch
138 is closed.
For normal access the drawer 162 may be pulled open
drawer. The initial movement of the drawer from the
FIG. 4 position in the opening direction will flex these
ribs and then the dropping of the drawer off of the “hump”
to the position 162' (FIG. 5) will further aid in tearing the
gasket free. Since the cabinet width is commonly about
twice the inside front-to-back depth of the freezer drawer
this takes care of most of the gasket. A similar effect is
obtained where the gasket is in contact with the near and
far ends of the drawer as seen in FIG. l by forming the
gasket with zig-zag ribs at any angle of say 45°, as seen
in FIG. 3. This, in conjunction with the inclined tops of
the end walls of the drawer, makes it relatively easy to
break the drawer free from any freezing shut that may
occur. The use of a plurality of ribs also aids in this
by preventing kitchen air from reaching the coldest of
by hand to the position 162'" shown by dotted lines, at
which full-open position it is retained by a “hump” in the
the ribs.
The freezer drawer is preferably made with its side
track similar to that which keeps the drawer in its closed
walls and bottom thicker or better insulated than other
position. This opening of the drawer does not cause de
walls of the cabinet, there being no insulation in the cabi
frosting, but it does light the lamp 158 to aid in seeing 20 net side walls at the level of the drawer. This insures
the drawer contents. A slight push moves the open drawer
that the frozen foods in the drawer will not be started to
off of the “hump” to the position 162”, from which it is
thaw during any normal periods during which the drawer
reclosed by gravity. The chain 194 and its lugs do not
is open. The bottom of the main food space, directly
move when the drawer is opened by hand.
above the freezer evaporator, need not lbe heavily in
An optional feature, which may be added if desired, is ~ sulated because leakage of heat from the main food space
the switch 166, by means of which the user may energize
into the freezer only aids in cooling the lower portion of
the motor 164 at any time, causing the drawer to be
the food space. It is only necessary to see that foods in
opened by power and held open until the switch is snapped
the bottom of the main food space do not freeze.
back to the solid line position to allow the drawer to
Switch 248 is a service provision for emergency de
reclose under the inñuence of gravity, all without ener
frosting. It is manually closed and self-opening by means
gizing the heater coil 156 and regardless of what con
of a clock or thermal release. When closed it starts a
trols may be on or off.
This is a refinement to accom
pany the power opening and closing of the two upper
doors of the cabinet, as described in copending applica
tions of mine listed above The switch 166 is preferably
located beside the lamp 15S or in the face of the cabinet
at a higher level, out of reach of small children, and is
arranged to snap from one position to the other. It will
not interfere with defrosting nor with any other func
tions which are time or temperature controlled, except
that the freezer drawer can not be cooled while open.
To provide against carelessness of the user in forgetting
to reclose the drawer, the switch 166 may be of the timing
variety, such »as those used on electric toasters, so that
the drawer will be closed automatically at the end of a
pre-selected time limit. The same provision can be made
for the mechanical reclosing of the two main upper doors
in combination with the mechanical self-opening feature
disclosed in my earlier patent applications above listed.
'I'he mounting of the drawer 162 on rollers with an in
clined telescoping track and the “humps,” which slightly
lift it at the fully closed and fully open positions, is
shown in FIGURES 7, 8 and 9, and will be understood by
defrost period of the freezer evaporator, including the
opening of drawer 162 if it is not already open. At the
end of the timed defrost period the switch 248 snaps back
to its normal position. This swi-tch is seldom used and
may be omitted, as service men can produce an artificial
defrost period by other means when required.
FIGURE 3 shows the freezer drawer gasket 210 as
seen from the bottom of FIG. l with the drawer 162 re
moved. The only part of the cabinet shown in section is
the right-hand side of the outer shell, which is continuous
to the base pan y130 of FIG. l. Looking upward into the
recess-174, which houses the freezer evaporator, we see
the gasket 210 and its flexible ribs 212, portions of which
are made in zig-zag form 212' where extending from
`front to back. The reason for this is to retain in these
front-to-back portions of the gasket as much of the ilexi
bility of the crosswise ribs 212 as is possible. Due to the
height, thinness and flexibility of these ribs and the fact
50 that they bend sidewise as the drawer is closed, they are
easily torn free from the top of the drawer as the drawer
is opened, ñrst dropping and 4then moving forward. At
reference to the similar telescoping tracks, usually of
the right, rear corner (front in FIG. 3) the gasket is cut
these tracks on 1a slight incline to lift the drawer as it
heater coil 156, which connections are located in a notch
at 252 and the ends secured by means of screws or other
channel form, which are commonly used on letter ñle 55 fasteners
254. This allows a portion of the gasket to be
drawers. In the case of letter files the tracks are hori
released and bent back for removal of the tubes and wires
zontal and normally have the “humps” at the closed posi
associated with the evaporator 144, the bulb :172, and the
tion only. The difference here is that I propose to mount
is opened, and to locate the “humps” at both ends of the 60 covered by the gasket. The zig-zag portion 212’ of the
gasket is located directly above the side walls of the
travel, so that the drawer is slightly lifted and retained in
freezer drawer, leaving a plain portion of the gasket 210
position by the humps in both its closed and its fully open
4exposed above the side spaces between the drawer and
positions. The nearly-open position 162” of FIG. 1
the side walls of the outer shell of the cabinet, the gasket
is just prior to the lifting `of the drawer which occurs as
it is moved to the fully open position 162'” in which it 65 also serving as a thermal breaker between the outer shell
is retained.
and the pan-shaped lining of the recess 174.
Use is made of gravity and of the power of motor 164
It will be noted that in FIG. l I have shown the motor
in breaking the drawer free from any ice or frost which
compressor unit 86 located at the top rear of the cabinet
has formed on »the top edge of the drawer and on the
instead of at the rear of the freezer drawer as in patents
gasket. The new type of gasket shown at 210 is provided 70 U.S. 2,709,343 and U.S. 2,765,633. The main reason for
to facilitate this breaking free as the drawer is opened
this is to increase the front-to-back inside dimension of the
either by hand or under power. The thin flexible ribs
drawer and thus provide more storage space for frozen
212 of the `gasket are bent to the positions shown kby the
foods. I further propose to make the outside front-to
closing of thedrawer, hence are so curved as to tear away
back dimension of the drawer greater than the correspond
readily from any frost bond between them and the 75 ing dimension of the upper portion ofthe cabinet and to
indent the rear outer wall of the drawer to provide room
for the motor v164, which generates very little heat as
References Cited in the file of this patent
compared with the unit 86, thus providing still more
freezer capacity in a given height. lIt is also proposed
that instead of making the freezer Walls thicker they be
insulated with a better insulating material, even though
this is more expensive than the insulation used in the
balance of the cabinet.
I claim:
In a refrigerator cabinet, a drawer having insulated 10 1,268,063
side and bottom walls, means supporting said drawer
and guiding drawer movement downwardly at the start
of its opening movement, and a gasket for sealing the
space between the insulated vertical walls of the drawer 15 2,241,086
and the cabinet structure above the drawer, said gasket
being provided with relatively thin and flexible ribs which
2,43 8,355
are flexed sidewise by the closing of the drawer and which
when frozen fast to a surface contacted thereby will be
torn `free by a peeling action as the drawer starts its
opening movement in the downward and outward direc
Taylor ______________ __ Dec. 4,
Koser ________________ __ Aug. 30,
Shanklin _____________ __ Aug. 18,
Feldkircher ___________ __ Nov. 20,
Eckart ______________ __ June 11,
Hart ________________ __ Mar. 28,
Bundy ________________ __ Oct. 8,
Cochran _____________ __ May 28,
Rosendahl ___________ __ May 2,
Passmore _____________ __ Aug. 18,
Holderle ____________ __ Aug. 2,
Gould _______________ __ May 6,
Cooper ______________ __ July 8,
Kalischer ____________ __ May 15,
Wilson ______________ __ Mar. 23,
Shreve ______ __ ______ __ Sept. 12,
Nussbaum ___________ __ Nov. 211,
Christie _____________ __ Nov. 1-1,
Mutlly _______________ __ May 31,
Yonkers _____________ __ June 26,
Falck ________________ __ Sept. 18,
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