close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2404973

код для вставки
July 30, 1946.
L. L. MALLARD
2,45l14,973
ICE TRAY
Filed April 1, 1944
2 Sheets-Sheet l
July 30, 1946.
L. L. MALLARD
2,464,973
ICE TRAY
Filed April 1., 1944
2 Sheets-Sheet 2
2,404,973
Patented July 30, 1946
UNITED STATES PATENT OFFICE
ICE TRAY
Logan L. Mallard, Norfolk, Va., assignor of one
half to‘ H. Clay Hofheimer, II, Norfolk‘, Va.
Application April 1, 194d,v Serial No.’ 529,098
10 Claims. (Cl. 62-1085)
1
This invention relates‘ toice forming apparatus
or ice, cube trays, and more particularly to a tray
having means for automatically releasing the ice
cubes from the tray after the ice is frozen and
the tray isv taken from the refrigerator.
It is’ an object of the invention to provide an
ice tray which will more positively and uniformly
eject.v the cubes when the tray is taken from the
ordinary household refrigerator.
Av further object of the invention is to provide
a simple. inexpensive, practical, device of the
above character;
The invention is intended to avoid the neces
sity for using levers or other extraneous mechan
ical devices for releasing the cubes for greater
ccnvenience;
Brie?y stated, the invention includes the com
bination of’ spring means and heat operated
meansfor distorting or moving a Wall or wall por
forming, an ice cube cell to eject the cube
one or more of which may be combined to
2
sheet metal or other good conduction material
with depressed wall portions‘ l4 providing cube
cells or pockets‘ for water or other material to be
frozene As shown the Walls forming the pockets
or cube'cells have separate bottoms I5 with their
edges spun, over the lower extremity of the de
pending walls M, or otherwiseintimately secured
thereto.’ In. order to facilitate the removal of ice
from the cube cells or ice pockets the walls M_ are
preferably tapered or uniformly enlarging from
bottom to top of the cells.’ thus- providing cells
larger at the top than at the bottom so that ice
may be- discharged more. easily.
The. bottom id of the cube cell or chamber in
which water is adapted to'be frozen to form- ice
is preferably thinner than the: side wall so that
it can be readily flexed». Inv order to‘ provide this
flexing action the tray is constructed in» a manner
to provide a closed chamber about the exterior
of each cube cell and between the cells and the
outer walls and bottom of the tray, This cham
ber is ?lled with a volatile substance and at a
provide an ice tray.
temperature and pressure such that’ when the
The. foregoing and other objects and advan
tray is taken-from its refrigerating environment
tages will become apparent in view of the follow
ing description taken in conjunction with the 25 such as the cooling unit» of a- household refrig
erator at a temperature below 32° Fahrenheit
drawings, wherein:
into the atmosphere at 70° or‘higher, heat will
Figure 1 is a’ perspective of an ice tray illus
?OW through the. wallsof the: tray and heat the
trating one application of thel'invention;
gas thereby causing» it to expand and-exert pres
Fig. 2, section on the. 1ine'2-—2 of» Fig. 1;
Figs; 3v and 4,, plan. and side views respectively 30 sure on the most easily flexed portions of the tray,
which according to the construction of the tray
or" a. mounting disc and coil springs for‘ applica
are the bottoms I5 of the ice cube cells. The-tray
tion beneath a cube cell;
may be provided with an extended end portion‘ 2|
Fig.
a transverse: section similar to that of
in accordance with the volume‘ of expansible
Fig. 2,. but with a different type‘ of spring. means
?uid desired to be maintained'within the chamber
‘beneaththe-cube cells;
of the tray.
Fig. 6, a multiple tempered spring unit;
In order to supplement this gas‘ expansion
Fig-.7, a- sectionon the line 1-1 of Fig. 5; and
mechanical spring means may be employed.
v8f. a transverse section of a tray similar to
This spring means may include coil- springs 16
those of Figs. 1, 2, 5 and 7, but with the bottoms
of which, as shown in Fig. 3; there may be any
of the cube cells corrugated and in physical con
desired number attached to a mounting or sup
tact with‘v the bottom of the tray.
porting plate ll, one of which? unit assemblies
Referring to the drawings, the tray of the
may be slipped beneath the‘ bottom- 15 of each
present invention consists of top 9 and bottom
cube cell. If desired, in lieu-of spring assemblies
sect-lens‘ iil-adaptedito have intimate contact with
vthe upper surface-of. a freezingv shelf of a house
hold refrigerator or other freezing surface, and
accordingly has a substantially ?at under sur
face. For strengththe bottom may have corru
gations or crimped portions ll extending longi
tudinally and transversely thereof or in any other "
desired manner.
The‘ bottom is also provided
with'a marginal upstanding ?ange i2 adapted to
form‘ a joint with the outer side wall I3 of the
" like that shown in Fig. 3 a- multiple tempered
spring unit l8' may beem‘ployed' with corrugated
spring members [9 attached at their ends to‘ the
member I‘8; This spring, unit may be inserted
beneath the under side of the bottom of each
ice cube cell as shown in Figs. 5 and 7, or‘ if
desired instead of utilizing aseparate spring‘ unit
a tray may be constructed like that of Fig. 8
in which the bottom 20‘ of each ice cube cell.‘ is
a spring: unit, or in other words a relatively
main body or top'section' of the. tray. This main
body or 'top'sectiono‘f the tray may be of stamped 55 thin spring diaphragm susceptible of flexure.
2,404,973
3
In accordance with the present invention the
expansion of ?uid due to increase in temperature
tray has certain portions, as for example, its
of the ?uid, said chamber forming walls being
side walls corrugated in order that they may
of a character to transfer heat from an external
be of relatively thin material but sufficiently
source to said ?uid, and said ?uid being of a
stiff and strong to resist distortion by gas under U! character and being present in such an amount
pressure within the hollow portion of the tray.
that upon a rise in temperature of the same that
The relatively stiff wall and bottom cause the
a force will be exerted upon said ‘bottom su?i
movable diaphragms or bottoms of the ice cube
cient to move the same toward the center of
cells or pockets to receive all of the force from
said pocket and break the bond between the
the combined expansion of gas and action of 10 pocket wall and ice therein, said bottom wall
the springs in the gas chamber of the tray.
being provided with means tending normally to
While in the drawings there appears to be con
siderable space beneath each of the ice cube cell
bottoms 15 or pockets, this space is exaggerated
in the drawings to show the construction, ac
tually there being as little space as possible in
order to provide a compact structure. With the
construction of Fig. 8 there is direct metal to
metal contact between the bottoms of the cube
cell and the bottom of the tray.
if)
NVith the construction described the springs
IQ of the structure of Fig. 2, the spring portions
l9 of the structure of Figs. 5 and 7, and the
spring discs 20 of Fig. 8, are all normally urged
upwardly under a temperature condition of
above 32° so that when the ice cube cells or
pockets
bottoms
slightly
pockets.
of the tray are ?lled with water the
of the ice cube cells or pockets project
upwardly into these ice cube cells or
However, upon the temperature being ~
urge it toward the center of said pocket thereby
supplementing the force by said ?uid upon said
bottom upon increase in temperature of ?uid.
3. In an ice tray having one or more pockets
for water to be frozen, and a ?uid chamber with
a gas in the chamber for absorbing heat and
deforming the bottom of the chamber to free
the ice in the chamber, and means between
and in contact with said deformable bottom and
the bottom of said ?uid chamber for supple
menting the force produced by the expansion of
the ?uid for freeing the ice.
4. In an ice tray having one or more pockets
for water to be frozen, and a ?uid chamber with
a gas in the chamber for absorbing heat and de
forming the bottom of the chamber to free the
ice in the chamber, means associated with said
deformable bottom for supplementing the force
produced by the expansion of the ?uid for freeing
reduced and freezing occurring the bottoms of
the ice, said means comprising a compression
the cube cells are depressed against the action
spring member in said chamber beneath the bot
of the springs and the expansible ?uid in the
tom of the pocket.
_
chamber of the tray and remain in this de
5. In an ice tray having one or more pockets
pressed condition until the temperature of the 5'75 for water to be frozen, and a ?uid chamber with
tray is elevated su?iciently that the conjoint ac
a gas in the chamber for absorbing heat and de
tion of both the gas pressure and the springs
forming the bottom of the chamber to free the
forces the ice upwardly in the pocket in each
ice in the chamber, means associated with said
cell so that it is freed therefrom.
deformable bottom for supplementing the force
It will be obvious to those skilled in the art ‘ produced by the expansion of the ?uid for free
that various changes may be made in the inven
ing the ice, said means comprising a spring plate
tion without departing from the spirit and scope
having a plurality of compressible spring por
thereof and therefore the invention is not limited
tions adapted to bear against the bottom Wall of
by that which is shown in the drawings and
said pocket.
described in the speci?cation but only as indi 45
6. In an ice tray having one or more pockets
cated in the appended claims.
for water to be frozen, and a ?uid chamber with
‘What is claimed is:
a gas in the chamber for absorbing heat and de
1. A device of the character described com
forming the bottom of the chamber to free the
prising wall structure having a pocket therein
ice in the chamber, means associated with said
for receiving Water to be frozen into a unit of
deformable bottom for supplementing the force
ice, the bottom wall of said pocket being de
produced by the expansion of the ?uid for free
formable, wall structure cooperating with said
ing the ice, said means comprising a spring mem
bottom to form a chamber, a body of ?uid con
ber in said chamber beneath the bottom of the
?ned in said chamber in a manner to exert pres
pocket, said spring member comprising a plate
sure against said deformable bottom wall upon UK UK having a plurality of coil springs mounted
expansion of fluid due to increase in temperature
of the ?uid, said chamber forming walls being
thereon.
7. In an ice tray having one or more pockets
of a character to transfer heat from an external
source to said ?uid, and said ?uid being of a
for water to be frozen, and a ?uid chamber with
a gas in the chamber for absorbing heat and de
character and being present in such an amount (it forming the bottom of the chamber to free the
that upon a rise in temperature of the same
ice in the chamber, means associated with said
that a force will be exerted upon said bottom
deformable bottom for supplementing the force
sufficient to move the same toward the center
produced by the expansion of the ?uid for free
of said pocket and break the bond ‘between the
ing the ice, said means comprising a spring mem
pocket Wall and ice therein, and compression " ber in said chamber beneath the bottom Of the
spring means for assisting the expansive action
pocket, said spring member comprising a spring
of the ?uid in breaking said ice bond.
plate having a plurality of corrugated spring
2. A device of the character described com~
portions for engagement with the bottom wall of
prising wall structure having a pocket therein
said pocket.
for receiving water to be frozen into a unit of
8. A device of the character described com
ice, the bottom wall of said pocket being de
formable, wall structure cooperating with said
bottom to form a chamber, a body of ?uid con
?ned in said chamber in a manner to exert pres
prising Wall structure having a pocket therein for
receiving water to be frozen into a unit of ice,
the bottom wall of said pocket being deformable,
wall structure cooperating with said bottom to
sure against said deformable bottom wall upon 70 IOl‘IIl a chamber, a body of ?uid con?ned in said
2,404,973
5
chamber in a manner to exert pressure against
said deformable bottom wall upon expansion of
?uid due to increase in temperature of the ?uid,
said chamber forming walls being corrugated at
the sides to increase the strength of the walls
and the surface area, said walls being of a char
acter to transfer heat from an external source
to said ?uid, and said ?uid being of a character
and being present in such an amount that upon
6
move the same toward the center of said pocket
and break the bond between the pocket wall and
ice therein, and spring means for assisting the
expansive action of the fluid in breaking said ice
bond.
10. A device of the character described com
prising wall structure having a pocket therein
for receiving water to be frozen into a unit of ice,
the bottom wall of said pocket being deformable,
a rise in temperature of the same that a force 10 wall structure cooperating with said bottom to
form a chamber, and including a corrugated side
will be exerted upon said bottom sufficient to
wall extending around three sides of the tray for
move the saline toward the center of said pocket
strengthening and providing increased surface
and break the bond between the pocket wall and
area, a body of ?uid con?ned in said chamber in
ice therein.
‘9. A device of the character described compris 15 a manner to exert pressure against said deform
able bottom wall upon expansion of ?uid due to
ing wall structure having a pocket therein for
increase
in temperature of the ?uid, said cham
receiving water to be frozen into a unit of ice,
ber forming walls being of a character to trans
the bottom wall of said pocket being deformable,
fer heat from an external source to said ?uid,
wall structure cooperating with said bottom to
form a, chamber, a body of ?uid con?ned in said 20 and said ?uid being of a character and being
chamber in a manner to exert pressure against
present in such an amount that upon a rise in
temperature of the same that a force will be ex
said deformable bottom wall upon expansion of
erted upon said bottom su?icient to move the
?uid due to increase in temperature of the ?uid,
same toward the center of said pocket and break
said chamber forming walls being corrugated at
the sides to increase the strength of the walls 25 the bond between the pocket wall and ice therein,
said ‘bottom wall being provided with means tend
and the surface area, said walls being of a char
acter to transfer heat from an external source
to said ?uid, and said ?uid being of a character
and being present in such an amount that upon
a rise in temperature of the same that a force 30
will be exerted upon said bottom su?lcient to
ing normally to urge it toward the center of said
pocket thereby supplementing the force by said
?uid upon said bottom upon increase in tempera
ture of ?uid.
LOGAN L. MAILARD.
Документ
Категория
Без категории
Просмотров
0
Размер файла
513 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа