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Патент USA US3075370

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Jan. 29, 1963
w. G. KNIFFIN
3,075,364
FREEZING DEVICE
Filed Sept. 7, 1961
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4 Sheets-Sheet 1
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INVENTOR.
BY
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H13 :47. UKZVEY
Jan. 29, 1963
Y w. s. KNIFFIN
3,075,354
FREEZING DEVICE
Filed Sept. '7, 1961
4 Sheets-Sheet 2
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Jan. 29, 1963
w. G. KNIFFIN
3,075,364
FREEZING DEVICE
Filed Sept. '7, 1961
4 Sheets-Sheet 3
INVENTOR.
BY
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ms A7704? [Y
Jan. 29, 1963
w. G. KNlFFlN
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3,075,364
FREEZING DEVICE
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Filed Sept. '7, 1961
4 Sheets-Sheet 4
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INVENTOR.
United States Pate?nt?O?ice
I
misses
Patented Jan. 29, 1953
2
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the ice trunnions are fractured by an initial force and the
portion of the fractured trunnions on an ice block there
3,075,364?
FREEZING DEVE?CE
?Walter G. Knif?n, Dayton, (lhio, assignor to General
after serve as cam means to relieve surfaces of ice blocks
from walls of the compartments during rotation of the
?Motors Corporation, Detroit, Mich, a corporation of
blocks within and outwardly thereof to facilitate their
removal from the tray.
Filed Sept. 7, 1961, ?Ser. No. 136,459
Other features and advantages of the present invention
13 Claims. (Cl. 62?-353)
will be apparent from the following description, reference
being had to the accompanying drawings wherein pre
This invention relates to a freezing device and par
ticulariy to a mold or tray member for use in household 10 ferred embodiments of the present invention are clearly
shown.
refrigerators and/ or in automatically operated ice mak
In the drawings:
ing apparatuses incorporated within such refrigerators for
Delaware
congealing water into ice blocks.
-
FIGURE 1 is a top broken plan view of an ice tray
for use in household refrigerators having compartments
therein of a predetermined form according to my inven
15
freezing device from which an ice block or blocks can be
tion;
readily removed from compartments thereof by a force
FIGURE 2 is an end view of the ice tray disclosed in
applied directly to the ice by ?ngers of a person?s hand
FIGURE 1;
or by other mechanical force applying means.
FIGURE 3 is a broken view taken along the lines 3?~3
Another object of my invention is to provide an in
expensive unique freezing tray or mold for use as such 20 of FIGURE 1 partly in section and partly in elevation
showing water in compartments of the tray;
per se in a household refrigerator and/ or for use in an
FIGURE 4 is a view taken along the lines 4-4 of FIG
ice making apparatus which tray or mold is devoid of
URE 1 showing a section of a compartment of the tray
movable walls and from which elongated ice blocks are
near one end thereof;
removed by a force applied to the top and one end there
FIGURE 5 is a view taken along the lines 5-5 of
25
of.
FIGURE
1 showing a section of the compartment of the
Still another object of my invention is to provide a
tray near the other end thereof;
freezing device including a mold having a cavity or cell
FIGURE 6 is a vertical sectional view taken along the
therein bounded by upright walls and a continuously
An object of my invention is to provide an improved
rounded integral lower wall that has a fixed curved sur
face formed by radii, each of progressively increased
length at least from a point substantially centrally of the
lines 6-6 of FIGURE 1 showing an ice block in a com
30 partment of the tray;
FIGURE 7 is a side view of an ice block removed from
a compartment of the tray and showing a fractured ice
cavity or cell to one of its ends, and in which a relative
trunnion on the ice block;
rotary movement between an ice block therein and the
FIGURE 8 is a top view of the removed ice block
mold shifts portions of the bottom of the ice block out
of contact with the rounded cavity wall to relieve friction 35 showing a fractured ice trunnion on each side of the
during the act of forceably removing the ice block from
block;
the mold.
A further object of my invention is to provide a freez
ing device or tray with compartments having a channel
FIGURE 6 diagrammatically illustrating the generation
or recess in a wall thereof that forms a trunnion or pro
tuberance on ice blocks frozen in the compartments which
bears and reacts against a wall portion or surface of
the channel or recess upon initiating rotation of the ice
FIGURE 9 is an enlarged sectional view similar to
of arcuate shaped ?xed Wall surfaces of different radii
40 incorporated in walls of compartments of the present ice
tray;
FIGURE 10 is an end View of some essential members
of an ice making apparatus with the tray member thereof
constructed according to my invention shown in a normal
blocks within and outwardly of their compartments to
water
receiving and freezing position by full lines and in
relieve certain portions of the blocks from contact with 45
a position attained upon removing all ice blocks there
a compartment wall or Walls for facilitating mechanical
from by dot-dash lines; and
removal of ice blocks from the device or tray.
FIGURE ll is a broken top View of the apparatus dis
A still further object of my invention is to provide an
closed in FIGURE 10 showing the relationship of an ice
improved ice making and harvesting apparatus with a
freezing mold or tray having cavities or compartments 50 ejecting member with the tray member of the apparatus.
Referring to the drawings the freezing device, to which
therein of unique design for obtaining mechanical release
the present invention relates, includes or comprises a one
of ice blocks from wells thereof and ejection of the ice
blocks out of the mold or tray with a minimum of force
in order to reduce the torque of a motor or other means
employed for removing the ice blocks.
A speci?c object of my invention is to provide a freez
ing device including a mold or tray having long rela
tively narrow cavities, cells or compartments therein
which are bounded by upright walls, diverging and/or
converging in certain directions, and by a continuously
rounded lower wall formed integral with the upright walls
and all walls of which are immovable relative to one
another wherein the rounded lower wall is a fixed curved
piece elongated mold or tray member generally designated
at 19 and stamped or formed of metal or molded plastic
material
as desired having a flat top rim portion, a down
55
turned peripheral ?ange i1 and integral supporting legs
?12 (see FIGURES 2 and 3) at the corners thereof. Mold
or tray member 19 has a row of long, relatively narrow
cells, cavities or compartments 13, preferably eight or
ten, therein for receiving a liquid such as water to be
frozen into elongated ice blocks. Each compartment,
cell or cavity 13 is bounded by opposed upright side walls
1d and a continuously rounded lower wall 16 integral
therewith and immovable relative to one another. The
upright side walls M of compartments 13 converge to
65 ward one side of tray member It? and consequently di
guished from semi-spherical, semicircular and half moon
verge toward the other or opposite side of the tray (see
shaped or the like rounded surfaces.
FEGURES l, 4 and 5). In accordance with my inven
A still more specific object of my invention is to pro
tion the inner surface ofthe continuously rounded lower
vide a freezing device of the tray type with a row of
compartment wall 16 is a ?xed curve formed by radii
elongated compartments adjacent side walls of which have
each of diflierent radius at least from a. point centrally
a water overflow passageway therein that is utilized to
freeze trunnions of ice on side-by-side ice blocks wherein ? of tray 1% or compartment 13 to one side of the tray or
surface generated by radii each having a different radius
from end to end of the rounded wall surface as distin
3
3,075,364
to one end of the compartment. Speci?cally, the inner
surface of compartment lower wall 16 is composed of in
tegral ?xed curved sections each having a different radius
of increased length from end to end of a compartment
13 for progressively enlarging the radii of the lower com
partment wall surface or of a cell or cavity in a direction
toward one end thereof. In other words the rounded
4
along line A, to the top of tray 10, indicated by the hori
zontal line extending transversely across the tray as shown
in FIGURE 9, is 1.25 inches.
Establishment of the ver
tical median line A together with the 1.25 inches depth
of compartment 15 provide an initial measuring arrange
ment to describe location of focal points of the differen
tial radii of continuously rounded compartment bottoms
in the present example. At 0.350 inch above the top of
from one to the other ends of compartments 13, as dis
tinguished from a semicircle, half moon shaped or a 10 tray 10 a point is ?xed on line A for a 1.60 inches radius,
indicated by the arrow line C, of the inner surface of
curved surface which has ?at portions therein and is
lower wall 16 is a ?xed curve of ever increasing radii
compartment wall 16 throughout 60� of its lower portion
therefore not continuously rounded. Generation of the
or 30� thereof on each side of center line A. On a line
radii of the inner surface of wall 16 will be more fully
drawn at a right angle to the focus point of radius C on
described hereinafter in connection with a description of
line A toward the left-hand side of tray 10 and par
FIGURE 9 of the drawings.
15 alleling the top thereof as viewed in FIGURE 9
Adjacent upright walls 14 of compartments 13 are joined
a center point of a circle, indicated by the dot-dash line
together at their upper extremity and are provided at the
E, is ?xed. The radius of circle E is greater than the
juncture therebetween with a concaved channel, ori?ce or
0.350 inch distance of focus point of radius C above
ice trunnion bearing forming means substantially centrally
of tray 10 and ends of the compartments having a generally 20 the top of tray 10 and this circle is scribed through this
point so as to be tangent to line A and to intersect the
arcuate shaped wall surface 18. It is to be noted that
tray top at the location thereon Where the 30� angle line
the arcuate shaped wall surface 18 of the recess or weir
is of different radii on each side of the longitudinal cen
of radius C, on the left-hand side of compartment 13 as
viewed in FEGURE 9, intersects the top of the tray. A
ter of tray 10. In other words, the radius of wall
focus
point for a 1.20 inches radius, indicated at B, is
surface 18 in the direction of one side of the tray mem 25
?xed on circle E at the location thereon of intersection
ber 10 is greater than that in a direction toward the
thereof with the tray top and the left-hand 30� angle line.
other side of the tray. Thus tray member 10 has two
Radius B extends upwardly from the 1.60 radius C along
?xed curved wall surfaces, compartment wall 16 and weir
the left-hand side of compartment wall 16. At a dis
walls 18 of the recesses, each of which is provided with
changing radii therealong and walls 18 form the ice pro 30 tance of 0.700 inch above the top of tray 10 and to the left
of line A, beyond where a 30� angle line of that portion
tuberance or ice trunnion bearings on ice blocks frozen
of radius C on the right-hand side of compartment 13
in compartments of the freezing device. A part or the
passes through the tangent point of line A with circle E,
lower portion of the wall surface 18 of the channel or
a focus point is ?xed on circle E for a radius of 2.00
recesses depends below the normal level of water placed
inches, indicated at D, forming the curvature of a 60�
in tray member 10 and provides a water over?ow pas~
angle portion of the inner surface of compartment wall
sageway between the row of side-by-side compartments
16 along the right-hand side thereof above and counter
to insure equalization of the water level in each compart
clockwise from radius C or throughout the remainder of
ment, cell or cavity 13 of the row thereof. The over?ow
the 180� extension of wall 16 with respect to the 1.20
inches and 1.60 inches of radii B and C respectively. In
this manner focus points for radius B and radius D are
?xed substantially equidistant from and both located on
particular shape of the arcuate recesses together with
the left-hand side of center line A as viewed in EEG
the ice trunnions play important roles or functions in the
URE 9. The focus point of each radius B, C, and D is
present invention as will be hereinafter described. Tray
arranged on the circumference of a circle drawn through
member 10 at each compartment second from ends of the
tray and on one of the sides only of the tray is provided 45 these points, as indicated by the dot-dash lines E, and con
sequently these radii are secant lines with respect to this
with a water spill-over depression 19 in the ?at top rim
circle and the curvature of rounded wall 16 of the cavities,
portion thereof. The spill-over depressions 19 insure ?ll
cells or compartments 13 is ?xed and has radii about the
ing of compartments in the tray with Water only up to
involute of a circle. Each radius B, C and D may vary
a desirable level therein to provide an ice protuberance
passageways between compartments 13 causes, when water
freezes therein, formation of an ice protuberance or trun
nion on ice blocks frozen in the compartments and the
or trunnion in the recesses of walls of the side-by-side
compartments 13 of a predetermined thickness from the
lowermost portion of a Wall surface 18 to the top of an
ice block to be frozen in the compartments.
Depressions
somewhat at its ends so as to blend smoothly into one
another and not be noticeable at meeting or junctures of
the ?xed curve. The three 60� angled portions or sections
of Wall 16, indicated in FIGURE 9, may, without depart
ing from the realm of my invention, be further divided
19 also serve in an ice making apparatus wherein one
tray member may be disposed over another tray member 55 into two or more angles each having a different radius
if desired. As far as the continuously rounded wall 16
is concerned it could be a part of an Archimedes, hyper
bolic, logarithmic or the like spiral having varied radii
imposed tray members.
each preferably of increasing radius from end to end of
Generation of curved wall surfaces, compartment wall
16 and the wall 18 of recesses or ice trunnion bearings in 00 the wall. Thus integral wall surface 16 of compartments
13 are composed of ?xed curved sections of progressively
termediate adjacent compartments 13 of tray 10, is il
or ever increasing radius at least from center line A to
lustrated in FIGURE 9 of the drawings. It is to be un~
one end thereof. Differential radii of wall surface 18 of
derstood that in describing this illustration and giving
the channels, recesses or ice trunnion hearings in walls
the following speci?c dimensions an example only is set
forth since such may be varied depending upon the arcuate 65 14 of compartments 13 of the ice tray is also illustrated
in FIGURE 9. The lower portion of wall surface 18
shape and particular size of ice blocks desired to be frozen
as means to cascade a measured amount of water delivered
to the trays from the upper to the lower of offset super
toward the one or left-hand side of tray 10 has a radius
F of 0.312 inch with its focus point on center line A.
The juncture of radius F of wall surface 18 with the up
the tray, opposite the side having depressions 19 therein
per
extremity of walls 14 is a radius G of 0.125 inch with
70
as viewed in FIGURE 9, toward which upright side walls
its focus point close to a line 30� from center line A. The
14 of compartments 13 converge, and at a point sub
remainder of wall surface 18 on the other or right-hand
stantially centrally of tray 10 or compartments 13 a ver
side of center line A has a constant radius H of 0.750
tical center line A is established. The distance from the
in the compartments.
Beginning approximately 1.68
inches inwardly from the one or left-hand side edge of
central inner surface portion of a compartment Wall 16,
inch taken therefrom and is suitably rounded by a radius
75 J, 45� from center line A, of 0.125 inch into the upper
3,075,364
5
extremity of adjacent compartment Walls 14, hence arcu
ate shaped wall surface 18 of the recesses or channels in
termediate compartments 13 of tray 19? are of different
radii.
It is to be understood that the ice tray of the present
disclosure may be a sheet metal stamping with at least
wall surfaces of compartments thereof, to be contacted
by Water or ice, roughened or patterned and thereafter
6
member 10. In other words, initial rotation or move
ment of the one ice block 22 immediately relieves con
tact of portions of its bottom with the intrinsic curvature
of the continuously rounded wall 16 of compartment 13
and very little effort is expended in breaking the ice trun
nion 23, rotating the ice block and removing same from
tray in. This operation is repeated progressively along
coated with a layer or ?lm of wax so as to reduce forces
the length of tray or mold It? to remove the desired num
ber or all of the ice blocks 22 therefrom. Thus my im
rigid plastic material, having the inherent property of
walls movable relative to one another and means for
somewhat resilient at least from end to end thereof and
of a refrigerator cabinet and supported upon a ?at sur
face of a table top or work ledge, another or alternative
necessary to loosen ice blocks from the compartments. 10 provement permits ice blocks to be manually removed
?with the greatest of ease from a mold or tray member of
Such feature is shown and fully described in the patent
a freezing device without employment of a force multi
to Robert E. Davis, No. 3,033,008 dated May 8, 1962
plying leverage mechanism or means to move bounding
entitled Patterned and Coated Ice Tray and assigned to
walls or walls adjacent ?an ice block. The ice block com
the assignee of this application. The ice tray 10 may on
the other hand be molded from any suitable ?substantially 15 partments in the present mold or tray, being ?devoid of
moving them, provides an inexpensive freezing device
shedding water, to thereby prevent or reduce bondage
which does not become damaged or inoperative with pro
of ice thereto. In this respect manual ejection of ice
longed life.
blocks from the present tray is made entirely feasible.
The particular construction of tray member 10 incites,
?Regardless of the material from which tray it} is formed 20
after the tray has been removed from a freezing chamber
or fabricated it will inherently be, due to its elongation,
capable of being slightly twisted.
mode of harvesting ice blocks from compartments there
Having described the construction of tray member It}
the method of harvesting ice blocks therefrom will now 25 of which can be carried out if desired. Due to the elon
be explained. Assuming that tray 10 has previously been
?lled with water, up to a level therein approximating the
level indicated at 21 in FIGURE 3 of the drawings, in
a below 32� F. freezing chamber of a refrigerator, the
water frozen into ice blocks 22, ice protuberances or
trunnions 23 thereon and therebetween and the tray and
ice therein removed from the chamber and supported
upon legs 12 on a kitchen work ledge or table and that
it is now desired to remove ice blocks 22 from the tray,
one hand of an operator is placed on the top side or por
tion of tray 10 having spill-out depressions 19 therein, to
steady the tray, and a downward force is initially applied
by the thumb or ?nger of the operator?s other hand to
the top and end of one ice block 22 on the opposite side
of the tray from the depressions. This initial force frac
gation of the freezing device and its inherent resilience
therealong an operator may place the palm of his or her
hand on top of tray 10, intermediate ends thereof, and
apply a downward force to both the tray and ice contained
therein to spring or how same downwardly and thereby
break or fracture the plurality of trunnions 23 on ice
gblocks 22 frozen in the tray. With the ice trunnions 23
fractured in this manner the act of rotating the ice blocks
about trunnions thereon, in or against the trunnion bear
ings, wall surfaces 18, can thereafter proceed in the fash
ion hereinbefore described to remove the blocks from
the tray.
?My improved ice tray or mold It} is applicable to serve
as an improved water freezing device, portion or element
of an ice block making apparatus and its use in such an
simultaneously therewith starts rotation of the block with
in its compartment 13 whereby same is readily loosened
apparatus permits employment therein of a smaller and
consequently less expensive motor for rotating a tray
member to eject ice blocks therefrom. In FIGURES
10 and 11 of the present drawings I show two members
practical in modern refrigerators wherein air is circulated
?F. insulated freezing chamber (not shown) such as a
tures the protuberance or trunnion 23 on the one ice
block 22, substantially centrally of the trunnion, and also
from walls of the compartment. Here it is to be further 45 of an ice block making apparatus which members are
normally conttained in or housed within at below 30�
understood that my invention is made more feasible and
out of a freezing chamber into contact with an evapo
frozen food or ice freezing chamber of a household re
shift or earn the bottom of the rotating ice block away
by bolts or the like 37.
from diverging portions of upright walls 14- whereby the
or recesses between compartments 13.
frigerator cabinet as is conventional and Well known in
rator of a refrigerating system associated therewith and
the
art. One member of this apparatus is in the form of
50
back into the chamber in a ?very cold stream over the
a freezing device embodying a tray or mold 3ft? of my
surface of water in a freezing tray or mold disposed With
improved character. Tray member 30 is slightly modi
in the chamber. In such an arrangement water contained
?ed over the tray 1%, disclosed inFlGURES 1, 2 and 3,
in the tray or mold is congealed from top downwardly
in a minor fashion to render it suitable for such installa~
erein and this freezing action substantially self-loosens
ice blocks from walls of the cavity or compartment in 55 tion in that legs 12 of the tray are omitted for the reason
such legs are of no utility in an automatically operated
which they are frozen. ?Continued application of the
ice
making apparatus. Tray member St} has one of its
downward force to the one ice block 22, after the ice
ends secured, by rivets or the like, to a plate 31 having
protuberance or trunnion 23 thereon is fractured, rotates
an integral shaft 32 extending therefrom adapted to be
this block within and outwardly of its compartment 13.
That portion of the fractured ice trunnion 23 remaining 60 connected to an electric motor or other means for swing
ing the tray member, which motor is usually located? be
on this one block 22 bears, during rotation thereof, against
yond walls of a freezing chamber containing thetray.
the wall surface, trunnion radius F and radius H (see
The other or opposite end of tray member 30 is secured,
FIGURE 9), or wall of channel or recess 13 which pre
by rivets or the like, to a plate 33 having a shaft 34
vents the ice block from being lowered within compart
ment 13 into engagement with its ?rounded lower wall 65 formed integral thereon. Shaft 34 is pivoted for rota
tion in a bearing aperture or hole provided in a support
16 as the block is rotated and that portion of ice trunnion
ing bracket 36 which has a base portion thereof attached
23 corresponding to the radius F acts as a cam means on
to a wall such as the bottom wall of a freezing chamber
the surface of wall 18, along the radius H thereof, to
Shafts 32 and 34 are located
from the increased radii of compartment lower wall 16. 70 at the neutral axis of tray member 3b as, for example,
on the center line A (see FIGURE 9), substmtially at
The ice block being rotated in the direction of the in
the locus point of radius F of wall 18 of the channels
creased radii of compartment Wall 16 also moves away
block rotates out of its compartment and is readily re
movable, by the operator?s ?ngers, from the tray or mold
The other mem
ber of the ice making apparatus is an ice block ejector
or ejecting member generally represented at 4t}. Mem?~
3,075,364
7
her 40 is stationarily mounted in association with tray
ice blocks the bottom of the blocks are progressively
member 30 upon a wall of a freezing chamber or a sup
re ieved from or moved out of contact with wall 16. At
port 41, by screws or bolts 42, and a downwardly directed
side edge portion thereof is provided with a plurality of
spaced~apart ?ngers 43. These ?ngers d3 ?are arranged
in different stepped distances with respect to one another
one time or another, especially if the surface of water
in tray member 39 is not exposed to a cold substantially
concentrated air stream circulated thereover, the ?rst
ice block 22 of the row thereof in the tray member may
from tray member 30 (see FIGURE 10) and are adapt
ed, upon swinging one of the member 30 and/ or 40 rela
'bond to or have ?a tendency to bind or stick to Walls
of its compartment 13 and the motor in continuing to
tive to the other of the members, to progressively enter
swing tray 34) toward member 4-0, after a ?nger 43 en
compartments 13 of tray member 3t}. It is to be noted 10 gages the ?rst ice block, will twist the tray member
that one ?nger at the end of tray member 39', adjacent
from end to end thereof and this twisting fractures all
the end thereof which is rotatably supported by bracket
of the ice protuberances or trunnions 23 throughout the
36, is lower than other of the ?ngers 43 and is the ?rst
length of the tray. It has been found that breaking of
to enter the compartment 13 at this end of the tray mem
the ice trunnions in this manner is advantageous rather
ber. While either member 39 or 4b can be stationarily 15 than detrimental because it then permits the force ap
mounted and the other pivotally mounted, I prefer to
plied to the ?rst ice block to readily start its rotation
mount tray member 30 for swinging movement toward
and camming action of the portion of the fractured trun
and into cooperative relationship with ejecting member
40. As hereinbefore mentioned the depressions 19 in
tray member 30 may serve ?as spill-over passages to cas
cade a measured amount of water admitted thereto to a
nion thereon at which time a resilient tray member will
immediately ?ex back into its nontwisted or original
position. The progressive engagement of ?ngers 43 with
tops of the ice blocks 22 cooperate with twisting of the
second tray member disposed therebelow when a dual
tray member to prevent ejection of all ice blocks at the
tray arrangement is employed in an ice making appa
same time or as a unit, by the interconnected trunnions
ratus.
23, from tray member 31} and insures rotation of the ice
Assuming now that water has been frozen into the 25 blocks one after another out of the compartments 13
ice blocks 22 within compartments 13 of tray member
whereafter they freely fall into an ice storage receptacle
30, ice protuberances or trunnions 23 above channel or
or bucket associated with the ice making apparatus and
recess walls 18 and the hard frozen condition thereof
removably located in the ?freezing chamber. Thus a
has been detected by a thermostatic means or the like,
relative rotation between ice blocks 22 and the tray
as is conventional or common practice in ice making 30 member 30 once having been initiated will cause their
apparatuses, and that a motor connected to shaft 32
progressive removal.
is energized. Tray member 30 and ice therein is swung
by the motor in a clockwise direction, as viewed in
In either of the ice making and harvesting arrange
ments herein disclosed it should from the foregoing ?be
FIGURE 10 of the drawings, toward cooperative rela
tionship with member 40. The lowermost end ?nger
apparent that ice blocks can be removed from their
compartments with the greatest of ease. Initial rotation
43 on member 40 is the ?rst to enter a compartment
of an ice block within its compartment immediately
13 of tray member 3% at the end thereof adjacent bracket
reduces friction between walls thereof and the ice block
36. Lowermost ?nger 43 engages ?and applies force to
and furthermore permits venting of the space inter
the top of the ice block at the end of compartment 13
mediate surfaces of the blocks and compartment walls
on the side of tray member 30 opposite the side thereof
normally contacted thereby so as to prevent creation of
having depressions 19 therein. The initial force applied
a succession therebetween during removal thereof, which
to the end of the ice block fractures the ice trunnion 23?
ordinarily impedes or renders ice blocks more difficult
between it and the next adjacent ice block and simul
to be released from compartment walls, regardless of
taneously loosens the block from walls of its compart
whether they are mechanically loosened or thawed loose
ment l3. Continued swinging movement of tray mem 45 therefrom. The intrinsic shape of the rounded lower
fber 36 toward the ?ngers 43 on ejecting member 4%
compartment walls and their increased radii in the direc
causes rotation of the one end ice block 22 within its
tion of rotation of ice blocks together with the different
compartment 13 and the next stepped ?nger then en
radii of the arcuate channels or recesses cooperate with
gages the top of the adjacent ice ?block and so on
one another to render the task of mechanically ejecting
throughout the length of tray member 30 to progres~ 50 ice blocks an easy one. Walls of the compartments are
sively loosen and rotate ice blocks in the row thereof
divergent or enlarged in the direction of rotation of ice
one after another in succession for consecutively re
blocks therein and these walls offer little resistance to
moving ice blocks from the tray of the apparatus. The
force applied to the blocks so that this force is initially
dot-dash lines in FIGURE 10 indicate tray member 30
directed to an ice trunnion on an ice block. Since such
swung into engagement with member 40 and illustrates 55 trunnions are very thin from top to bottom they are
the ice block in the last or farthest from the bracket
easily manually or mechanically fractured whereby the
end of the tray being ejected therefrom by the upper
fractured portion thereof remaining on an ice block can
most ?nger 43. When tray member 3% has been swung
carry out the function of preventing the block from being
to this position the electric motor may be reversed in
lowered within its compartment during rotation thereof
any suitable or conventional manner so as to return the 60 and of shifting or camming surfaces of the block away
vtray member to its normal upright water receiving,
from walls of the compartment.
water freezing position to thereafter await another freez
While the embodiments of the present invention as
ing and ice ejecting cycle of the apparatus. The elec
herein disclosed constitute preferred forms, it is to be
tric motor may be a conventional timed reversible type
understood that other forms might be adopted.
now well known to those skilled in the art. That portion 65
What is claimed is as follows:
of the fractured ice protuberances or trunnions 23 re_
1. An ice block making apparatus comprising in com
maining on each ice block 22 bear, as the ice blocks
bination, a tray member to be refrigerated to a tempera
are rotated within compartments 13, against wall sur
ture below 32� F. having a row of elongated compart'
face 18, radius F ?and radius H (see FIGURE 9), of
ments therein for receiving water to be frozen into
the channels, recesses or trunnion bearings between the 70 elongated ice blocks and an ice block ejecting member
compartments and the cam part on the trunnions 23,
associated with said tray member provided with a plural
corresponding to radius F, shift the rotating ice blocks
ity of spaced-apart ?ngers thereon, one of said members
relative to or away from the rounded lower compart
being stationary and the other member being swingable
ment wall 16. By virtue of the intrinsic shape or in
into cooperation with said one member, each compart
creased radii of wall 16 in the direction of rotation of 75 ment of said tray member being bounded by opposed
3,075,364
upright walls and another wall curvilinear from end to
end of the compartment, said curvilinear wall of the
compartments being formed by radii each of increasing
length at least from a predetermined point in a com
partment to an end thereof toward one side of said
1%
Walls and another wall integral with said side walls which
is continuously rounded from the top at one end of the
cavity to the top? of the other end thereof, and said an
other rounded wall being a fixed curve formed by radii
each of changing length from end to end of said cavity.
tray member, said fingers on the ejecting member being
6. A freezing device including a tray provided with
bounded by upright walls and another wall curvilinear
from end to end of the compartment and formed by radii
each of increasing length at least from a predetermined
side of said tray member, adjacent upright compartment
walls being joined together at their upper extremity and
least from the center of a compartment to an end thereof
in a direction toward one side of said tray with respect
to a single radius of the coextensive part of the other
of said wall surfaces, the top of an elongated ice block
adapted to have a downward force applied thereto at the
end thereof opposite said one side of said tray for rotat
erally arcuate shaped wail surface a part of which de
pends below the normal level of water placed in said tray
fracturing said ice trunnion, and that portion of the frac
tured ice trunnion remaining on said rotating ice block
a plurality of cavities therein, said cavities being bounded
of such length as to enter said compartments upon swing
by upright walls and another wall integral therewith
ting one of said members relative to the other of said
which is continuously rounded from the top at one end of
members and engage and apply force to the top of
elongated ice blocks frozen therein at the end thereof 10 the cavities to the top of the other end thereof, said up
right walls of each of the cavities diverging in the same
opposite said one side of the tray member for rotating
direction toward one side of said tray, and said rounded
the ice blocks within and outwardly of the compart
wall of the cavities being a ?xed curve formed by radii
ments, and portions of the bottom of said ice blocks ?being
each of increasing length at least from a point substan
when their rotation is initiated shifted out of contact
tially centrally of a cavity to its end adjacent said one
with said rounded curvilinear wall of the compartments
side of said tray.
to facilitate removal of the blocks from said tray member.
7. A freezing device comprising a tray having a row
2. The combination de?ned by claim 1 wherein 0p
of long relatively narrow compartments therein adapted
posed upright walls of each compartment are divergent
to receive water to be frozen into elongated ice blocks,
in the same direction toward the one side of the tray
member to also relieve portions of sides of the ice blocks 20 each compartment being bounded by two upright walls
and a wall surface which is continuously rounded from
from contact with said upright compartment walls.
the top at one end of a compartment to the top of its
3. An ice block making apparatus comprising in com
opposite end, adjacent upright compartment walls being
bination, a resilient tray member adapted to be twisted
joined together at their upper extremity and provided at
from end to end thereof to be refrigerated to a tempera
the juncture therebetween with a recess substantially cen
ture below 32� F. having a row of long relatively narrow
trally of ends of said compartments, said recess having
compartments therein for receiving water to be frozen
a generally arcuate shaped wall surface with a part there
into elongated ice blocks and an ice block ejecting mem
of depending below the normal level of water placed in
ber associated with said tray member provided with a
said tray to provide an overflow weir between the com
plurality of spaced-apart ?ngers thereon each arranged
partrnents causing when water freezes therein formation
in different stepped distances from the tray member, one
of an ice trunnion intermediate ice blocks frozen in said
of said members being stationary and the other of said
row of compartments, one of said well surfaces being a
members being swingable into cooperation with said one
?xed curve formed by radii each of increasing length at
member, each compartment of said tray member being
point in a compartment to an end thereof toward one
provided at the juncture therebetween with a recess cen 40 ing same within and outwardly of its compartment, the
initial application of force to said rotating ice block
trally of ends of compartments, said recess having a gene
member providing a water overflow passageway between
each compartment and causing when water freezes in said
passageways formation of ice trunnions intermediate ice
blocks frozen in said compartments, said spaced-apart
?ngers on said ejecting member being of such length as
to progressively enter said compartments upon swinging
bearing during rotation thereof against said weir where
by the part of said ice block normally engaging said one
wall surface throughout its increased radii is shifted out
of engagement therewith to facilitate removal of the
block of ice from said tray.
8. A freezing device as defined by claim 7 wherein
one member relative to the other member whereby one
the opposed upright walls of each compartment of the
?nger engages and applies force to the top of one elon
gated ice block therein at the end thereof opposite said
one side of the tray, the initial force applied by said one
?nger to said one ice block twisting said tray member and
fracturing ice trunnions intermediate ice blocks in said
compartments, other of said plurality of ?ngers on the
9. A freezing device including a mold provided with
an elongated cavity therein adapted to receive water to
be frozen into an ice block, said mold cavity being
ejecting member engaging the top and said end of all
of the elongated ice blocks in said row of compartments
row thereof are divergent in the same direction toward
the one side of the tray.
bounded by opposed substantially upright walls and an?
other wall integral therewith which is continuously
rounded from the top at one end of the cavity to the
top of the other end thereof, said rounded wall being a
during continued relative swinging of said members for
rotating the ice blocks Within and outwardly of their com 60 ?xed curve formed by radii each of progressively increas
ing length from a predetermined point in the cavity to
partments, and that portion of the fractured ice trunnions
one of its ends, said ice block being rotatable within said
remaining on the ice blocks bearing against said arcuate
cavity toward and upwardly relative to said one end
shaped wall surface of the recesses to relieve the bottom
thereof for effecting removal of the ice block from said
of said ice blocks while they are being rotated from con
mold, ?and the intrinsic shape of said rounded cavity wall
65
tact with said curvilinear compartment walls for facili
being such that contact of portions of the bottom of said
ice block therewith is relieved upon initiating rotation of
the block.
10. A freezing device as de?ned by claim 9 wherein
continuously rounded from the top at one end thereof to
the top- of its opposite end, and said rounded well being 70 wall of the mold cavity are metal and provided with a
multitude of spaced-apart reoccurring depressions there
a ?xed curve formed by radii each of increasing length at
in imparting a patterned surface thereto which is coated
least from a point substantially centrally of the cavity to
with a coextensive layer of nonporous nonmetallic water
one of said ends thereof.
repellent material.
5. A freezing device including a mold provided with
11. A freezing device as de?ned by claim 9 wherein
a cavity therein, said mold cavity having upright side
tating removal of the blocks from said tray member.
4. A freezing device including a mold provided with a
cavity therein, said mold cavity having a wall which is
3,075,364
11
walls of the mold cavity are constructed of substantially
rigid water shedding plastic material.
12. A freezing device including a tray provided with
12
least portions of the bottom of an ice block therewith
upon initiating rotation of said block.
13. A freezing device including a mold provided with
a plurality of elongated cavities therein adapted to re
a cavity therein, said mold cavity having a wall the sur
ceive water to be frozen into ice blocks, said cavities 5 face of which is arcuate shaped and continuously rounded
being bounded by opposed substantially upright side walls
between the top of opposite sides thereof, and said wall
diverging from one end thereof to their other end and
surface being a ?xed curve formed by radii each of in
another wall integral with said side walls which is con
creased length from a point intermediate said top of one
tinuously rounded throughout its entire extension be_
side to said top of the other side of said cavity.
tween the top of ends of the cavities, said rounded cavity
wall being a ?xed curve formed by different radii, said
References Cited in the ?le of this patent
radii each ?being of increased length from a point in the
UNITED STATES PATENTS
vicinity of said one end of said cavities toward said
1,889,481
Kennedy ____________ __ Nov. 29, 1932
other end thereof, said ice blocks being when a force is
2,717,503
Woehler ____________ __ Sept. 13, 1955
applied to the top- thereof at said one end of a cavity
2,757,519
Sampson ____________ __ Aug. 7, 1956
selectively rotatable therein toward and outwardly of its
said other end, and said divergent side Walls cooperating
with the intrinsic contour of said rounded wall of a cav
2,796,742
2,968,168
Flatt ________________ __ June 25, 1957
Lip-pincott ___________ __ Ian. 17, 1961
ity to simultaneously relieve contact of both sides and at
3,003,335
Kattis _______________ __ Oct. 10, 1961
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