close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3048997

код для вставки
Aug. 14, 1962
E. B. ARCHER
3,048,986
AUTOMATIC ICE MAKING DEVICES
Filed Nov. 19, 1959
3 Sheets-Sheet 1
7.17.1.
INVENTOR.
590m; 15. ?ecasq
"MR/4%
Aug. 14, 1962
E. B. ARCHER
3,048,986
AUTOMATIC ICE MAKING DEVICES
Filed Nov. 19, 1959
5 Sheets-Sheet 2
7.5
47 "L7
I
73
E’YLING 5. AQCHEQ
“WP/4%
A rroe/vey
Aug. 14, 1962
E. B. ARCHER
3,048,986
AUTOMATIC ICE MAKING DEVICES
Filed Nov. 19, 1959
3 Sheets-Sheet 5
'all!!!Ill/11111111111111![Ill/IQ
5\
5|
3?)
'
32>
49
v
89
.
89
39
/
/ 4/
949
23b
0/
EFL/~6- 5. Apcuezq
BY WP 114%
United States Patent 0 ”
ce
3,048,985
Patented Aug. 14, 1962
2
3,043,936
AUTGMATHQ ICE MAKING DEVIPCES
Erling B. Archer, 33--74- 191st 5L, Flushing, ELY.
Filed Nov. 19, W59, Ser. No. 854,138
19 Claims. (Cl. 62-345)
A further object of the present invention is to provide
novel supply-responsive means in association with the
ice cube storage means for such ice making devices,
which supply-responsive means are effective to interrupt
the ice-forming operation as soon as a predetermined
quantity of ice cubes has been collected in the storage
This invention relates to automatic ice making de
vices, and in particular to apparatus for use in a standard
refrigerator for the purpose of freezing and harvesting
blocks of ice, commonly referred to as ice cubes.
There are available on the market at the present time,
for use in household refrigerators, several different types
of ice cube making devices, some of which are fully
automatic and provide a continuous supply of ice cubes,
while others are semiautomatic or even non-automatic
means.
Still a further object of the present invention is the
provision of such ice making devices which are inexpen
sive to construct and maintain and which are su?iciently
economical to warrant their incorporation in all standard
refrigerators at a minimum of extra cost to the ultimate
consumers.
The foregoing and other objects, characteristics and
advantages of the present invention will be more fully
in that they require removal of a formed batch of cubes
from the storage bin and/or manual emptying of the
ice ‘mold or tray prior to the formation of the next
batch of ice cubes. Several of such ice makers further
require thermostatically controlled heating means in co
operative relationship with the ice mold for loosening the
understood from the following detailed description there
of when read in conjunction with the accompanying
drawings, in which:
FIG. 1 is a fragmentary, partly sectional illustration
ice cubes from the mold surfaces so as to enable associ
ated gripper and/or conveyor means to remove the
invention;
cubes from the mold. By their very nature, these last
mentioned ice makers still further entail the provision
freezer cabinet as seen from one side of the refrigerator;
of a refrigerator freezer cabinet as seen from the front
of the refrigerator and shows the features of the present
FIG. 2 is a partly sectional, fragmentary View of the
cubes prior to transfer of the latter to the storage bin.
For the foregoing and a variety of other reasons, the
known ice cube making devices have failed to find full
FIG. 3 is a sectional view taken along the line 3—3
in FIG. 2;
FIG. 4- is a partly sectional, fragmentary view of the
structure shown in FIG. 1 and illustrates the ice cube
freezing device in one stage of operation thereof;
acceptance in the market. As will be readily appreciated,
they are extremely expensive to produce and di?icult to
device in another operational stage thereof;
of means for drying the wet surfaces of the removed ice
incorporate or install in commonly available refrigera
tors.
Moreover, with respect to those devices which are
FIG. 5 is a View similar to FIG. 4 and illustrates the
FIG. 6 is a perspective elevational View of the cam
means employed as a part of the device according to the
less than fully automatic, proper functioning thereof de
present invention;
pends on constant attention by the possessor of the re
frigerator, and since freezing of a new batch of cubes
in such non-automatic devices cannot be initiated until
in FIG. 6;
the preceding batch has been removed from the mold,
the possibility of an insufficient supply of cubes in the
event of a sudden, heavy demand therefor is always
present. Still another problem which has not yet been
satisfactorily resolved in such known ice cube making
devices is that of accelerating the freezing of water in
the mold, with the object of possibly reducing the freez
for clearing accumulated ice particles from the water feed
tube or conduit employed in accordance with the present
ing time for each batch of cubes to an‘hour or less.
FIG. 7 is a sectional view taken along the line 7-7
FIG. 8 is a sectional view taken along the line 8-3
in FIG. 5;
FIG. 9 is a fragmentary, perspective view of the means
invention; and
FIG. 10 is a sectional view taken along the line 1tl-—
10 in FIG. 2.
Referring now more particularly to FIGS. 1 and 2
of the drawings, it will be seen that a refrigerator 20,
having a freezer cabinet 21 maintained at a temperature
It is, therefore, an important object of the present
invention to provide novel ice cube making devices
which are substantially automatic in operation and free
below the freezing point of water, is provided with an
of the disadvantages and drawbacks inherent in known
ice cube freezing device 22 in one of the rear corners
50
devices of this type.
of the freezer cabinet. The freezing device 22 comprises
Another object of the present invention is to provide
a substantially U-shaped sheet metal supporting frame
automatic ice making apparatus greatly simpli?ed in
23 having upstanding side members 23a and 23b and a
construction and capable of being employed with all
transverse or bottom member 23c. The side member
refrigerators having a freezer compartment normally
23a of the supporting frame 23 is provided at its free,
maintained at a temperature below the freezing point
upper edge with a pair of ears 24 by means of which
of water.
it is suspended on a horizontal rod 25, the latter being
Still another object of the present invention is the
in turn supported adjacent the roof or top wall 26 of the
provision of means, in an automatic ice cube freezing
freezer cabinet by means of brackets 27 and 28. The
second vertical side member 2312 of the frame 23 is
duce materially the time required for each freezing cycle. 60 provided on its outer surface with a pad 29 of rubber
A more speci?c object of the present invention is to
or other resilient, plastic material (either natural or syn
provide a pivotally mounted ice mold or tray in conjunc
thetic) and at its inner surface adjacent its uppermost
edge with an abutment member or bar 30 extending sub
tion with means for blowing cold air against the tray
stantially along the entire front to rear dimension of the
in all of the different positions of the latter for the pur
65 frame. The bottom or transverse member 230 of the
pose of accelerating the freezing period.
frame 23 is provided with a large opening 31 which pref
It is also an object of the present invention to provide
erably is stamped out of the plate of which the frame is
cam ‘means for effecting the ejection of ice cubes from
made.
the ice mold, which cam means may comprise two cams
The refrigerator 20 has a rear wall 32 which may be
one of which serves to loosen the ice cubes in the tray 70
hollow and ?lled with any suitable type of insulating
or mold while still incompletely ‘frozen, and the other
material. A tubular conduit 33 extends from the outer
of which serves as the actual cube ejector.
surface of the rear wall of the refrigerator to the interior
device of the aforesaid type, which are effective to re
3,0d8,986
'
4
3
of the freezer cabinet 21. Fixedly positioned at the out
side of the refrigerator about the mouth of the ‘tube or
conduit 33 is an apertured mounting plate 34‘ which sup
ports a solenoid valve 35. The valve 35 is normally
closed and is adapted to be opened upon energization of
its operating coil (not shown) via a pair of conductors
36 connected with spaced coil terminals 37 and with
a control circuit still to be described. A flexible tube
power, for example, the main power line of the refrigera
tor 23 itself. The shaft 6% is connected with a reducing
gear mechanism 63 mounted on the horizontal support
ing frame member 230 adjacent the opening 31 of the
latter, while the shaft 61 is connected to the impeller
or bladed rotor (not shown) of a suction fan 64 sup
ported from the frame member 23a by means of a
mounting bracket 65.
The reducing gear mechanism 63 is provided with an
38, which may be connected at one end to any suitable
reservoir or source of water, communicates with the 10 output shaft 66 which carries at its free end a transverse
valve 35 and thus is adapted to communicate through
the latter with the feed or inlet tube 33.
'
extension or arm 67 which is adapted to be rotated in a
clockwise direction as seen from the right-hand side of
FIG. 1. As clearly shown in FIGS. 1, 6 and 7, the arm
67 carries at its trailing outside edge 67a a hinge 63 by
metallic frame 43 and a water-receiving body 41 made 15 means of which a relatively large cam 69 is pivotally
connected to the arm. This cam will hereinafter be
of polyethylene, rubber or any other elastic (synthetic or
referred to at times as the cube ejection cam, The arm
natural) plastic material. The body 41 is divided into a
Located within the freezer compartment 21 is an ice
mold or tray 39 which comprises a rigid, preferably
plurality of pockets 42 each of substantially half-moon
shape which are seperated from one another at their outer
surfaces, as best shown in FIG. 2. The tray frame 43
has side edges 40a and 431;, a front edge 40c and a rear
edge 40d. A roller 40’ is journaled in the side edge 4%
67 further carries on its outer face 67b and at a location
intermediate the hinge 68 and the shaft 66 a smaller cam
73 which will hereinafter be referred to at times as the
cube loosening cam. With respect to the larger cam 69,
it will be seen that as long as the leading outside edge
67c of the arm s7 is disposed above the trailing edge 67a,
i.e., after the arm 67 during its rotation has passed the
Attached to the tray frame 40 at the ‘front edge We 25 downwardly directed vertical position thereof, the cam 63
will hang from the arm by means of the hinge 68 and
thereof is an upstanding bracket 43 provided with an ear
will thus not be in a position to catch on the tray frame
or like annular bearing member 44 through which extends
4%} when the latter is in the broken-line position thereof
a horizontal bearing pin 45 af?xed to a stationary bracket
indicated in FIG. 1. When the arm 67 passes the up
46 suspended ‘from the roof or top wall 26 of the freezer
of the tray frame for a purpose to be explained more
fully hereinafter.
cabinet, as shown at 47. A small cotter pin 43, or if de
sired a nut, lock Washer or other retaining member, is
mounted on the free end portion of the bearing pin 45
wardly directed vertical position thereof, however, the
cam 69 will flip over and fall against the surface 67b of
the arm 67. At this itme the operative surface 6% of
the cam 69 will be in a position to engage the roller 40'
and prevents accidental sliding of the bearing member
in the side edge 4th: of the tray frame 40, as will be
44 off the pin. The rear edge 43d of ‘the tray frame 40
carries a bearing member or car 49 which rotatably sur 35 more fully explained presently.
rounds the tube 33. The axis of the tube 33 is aligned
with that of the pin 45, and the tray is thus pivotally
mounted ‘for swinging movement about this axis. Unde
sired movement of the tray 39 toward the rear wall of the
refrigerator is inhibited by a washer or split ring 5t}
Positioned below the supporting frame 23 is a bin or
receptacle 71 which is adapted to receive ice cubes ejected
from the tray 39 and to store the cubes until the same
are used, ‘a door 71' being provided, if desired to fa
cilitate removal of the cubes from the bin. For the
purpose of preventing an accumulation of an oversupply
of ice cubes, the side wall 71a of the bin 71 is cut away
at its uppermost edge a certain distance below the level
journals 45 and 33, this requiring only the removal of
of the upper edges of the remaining walls of the bin.
the cotter pin or other retaining member 48 from the
Hingedly mounted on the upper edge of the bin wall 71a
bearing pin 45.
45 at 72 is a trough-shaped ?ange 73 to which is connected
A?ixed to the tray frame 40 at the side edge 4%
a lug or stop member 74. The flange 73 extends out
thereof is a counterweight 51. The balance conditions
wardly ‘of the bin '71, and the stop member '74 projects
of the tray or ice mold 39 are such that when the pockets
into the bin 71. The ?ange and stop member are nor
4,2 are empty the tray is tilted upwardly to the extent
mally retained in the position thereof illustrated in FIG. 1
permitted by a stop or like member 52 a?ixed to the
by means of a light torsion spring "75. The upper edge
inner surface of the vertical member 23a of the support
of the ?ange ‘73 is disposed adjacent the operative posi—
ing frame 23, while when the pockets 42 are ?lled with
mounted on the tube 33. It will be understood that the
tray 39 can be easily mounted on or removed from its
water or ice the tray is so unbalanced as to tend to move
toward the broken-line position thereof shown in FIG. 1.
Such movement is ordinarily inhibited by a latch mem
ber 53 rockably mounted on a pivot pin 54 carried by
the frame member 23a and adapted to engage the under
side of the tray frame side edge 40a. The latch member
53 is biased to its tray-engaging position by a small
torsion spring or like element 55 and is positively con
nected with a downwardly extending arm 56 having at
its lowermost end an extension 56a.
Thus, a counter
clockwise rocking of the arm 56 (as seen in FIG. 1)
will cause the latch member 53 to be retracted from the
tray frame 49 so as to permit the tray 39 to drop into its
downwardly slanted position. The means for causing
such a rocking movement of the arm 56 will be more
fully described hereinafter.
The side member 23a of the supporting frame 23 is
provided a short distance above the horizontal or trans
verse member 230 with an opening 57 in which is ar
tion of a switch arm 76 of a microswitch '77 which is
connected by means of a pair of conductors 78 to the
power line conductors 62 of the motor 59. The switch
arm 76 is adapted to be moved to the broken-line posi—
tion thereof indicated in FIG. 1, so as to open the switch
77 and interrupt operation of the motor 59, when the
?ange 73 is rocked in a counterclockwise direction upon
accumulation thereon of a predetermined quantity of ice
cubes.
A?ixed to the exterior surface of the bin wall 71a by
means of a pair of brackets '79 is a tube or pipe 80 the
uppermost end of which is connected to a flexible con
duit 81 communicating at its other end with the outlet
port 64a of the suction fan 64. The bin itself is mounted
on a plurality of ?anges 82 (only one of which is shown)
which de?ne below :the bin 71 a substantially air-tight
space 83. The lowermost end of the pipe 80 communi
cates with the space 83 through the ?ange 82 located
below the wall 71a. Arranged Within the space 83, pref
erably by being attached to the bottom Wall 7112 of the
bin ‘71, are several partition members 84 which do not
ranged with the aid of a conventional rubber mounting
58 an electric motor 59 having two output shafts 60 and
extend all the way across the space 33 but are staggered
61. The motor 59 is adapted to be energized through a
with respect to one another so as to de?ne a tortuous
pair of conductors 62 connected 0t any suitable source of 75 ?ow path for air, as indicated by the arrows in FIG. 3.
3,048,986
6
The side wall 710 of the bin 71 opposite the wall 71a
is provided with a recessed portion 85 by means of which
there is de?ned between the bin and the adjacent side
tray becomes horizontal, i.e., when it is ?lled with the
desired quantity of water.
wall 21a of the freezer cabinet an elongated recess or
according to the present invention will thus be seen to
passageway 86 the lowermost end of which communicates
with the space 33 beneath the bin. Positioned atop the
bin wall 71c in ?uid-tight connection with the passage
way 86 is a duct 87 which extends upwardly at a slant
The operation of the automatic ice cube making device
be as follows, reference being had in particular to FIGS.
1, 2, 4 and 5.
At the beginning, it is assumed that the tray 39 is ?lled
with water and that it has just come to rest in a horizontal
from the bin wall ‘710 through the opening 31 in the
state with the tray frame edge 40a engaging the latch mem
supporting frame 23 and terminates adjacent the down 10 ber 53. The motor 59, which is preferably a small con~
wardly slanted position of the ice mold or tray 39 (see
stant speed motor available commercially at very little
FIG. 1). The length of the duct 87 as measured from
cost, is operated continuously. The output shaft 61 ro
the front to the rear of the freezer cabinet 21 is sub
stantially the same as that of the tray 39.
Referring again to the output shaft 66 of the reducing
gear mechanism as, it will be seen that there is provided
on this shaft a lateral projection or arm 38 which moves
with the shaft as the same rotates. The length of the arm
88 is such that at one point of its angular travel it can
tates at the motor speed and thus drives the bladed wheel
or rotor of the suction fan 64 at a relatively rapid speed
to draw air from the freezer cabinet into the conduit
Ell-8i}. This air, which is already at a relatively low
temperature, is thus forced to ?ow through the space 83
beneath the storage bin 71. In this space, the air is
passed over and further cooled ‘by the horizontal evapora
engage the extension 56a of the latch-operating arm 56 20
tor coils (not shown) normally contained in the bottom
(see also FIG. 8). When the arm 88, while in motion,
wall 21b of the freezer cabinet, and due to the provision
engages the extension Eda, the latter and therewith the
of the staggered partitions 84, the How path of the air
arm 56 are rocked counterclockwise (as seen in FIG. 1)
through the space 83 is lengthened to increase the inter
about the axis of the pivot pin 54‘ so as to withdraw the
val of time during which the air is cooled. Upon ?owing
latch member 53 from beneath the tray ‘frame side edge 25 up through the passageway 86, the already cooled air is
f-itla. The arm or projection 88 and the cams 69 and 70
thus constitutes cam means operable to render the latch
or holding means 53-55 ineffective after a predetermined
time interval so as to permit the tray to move from its
still further cooled by contact with the vertical evaporator
coils (not shown) located in the side wall 21a of the
freezer cabinet. Consequently, the air ?owing out of
the duct 87 and into the space within the supporting frame
horizontal position to its downwardly slanted position, 30 23 and below the horizontal tray 39 is at a much lower
the cam means being also operable to effect a deformation
of the tray body 41' and the consequent ejection of ice
cubes therefrom while the tray is in its downwardly
slanted position.
In accordance with the present invention there is fun
ther provided means for ensuring that the interior of the
inlet tube 33 can never ‘become clogged by accumulated
ice. Referring in particular to FIGS. 2, 9 and 10, it will
be seen that attached to the tray frame side edge 4% is
an upstanding bracket ‘39 to the uppermost end of which
is connected an arcuately shaped scraper blade 90 which
extends into the tube 33 substantially concentrically with
the latter. When the tray 39‘ is in its horizontal position,
i.e., ?lled with water or ice and resting on the latch mem
ber 53, the scraper blade 90 is substantially in the position
shown in FIG. 10. When the latch 53 is withdrawn and
the tray pivots downwardly, the scraper blade 90 is ro
tated within the tube 33 in a clockwise direction (as seen
in vFIG. 16), whereby the relatively sharp edge 96a of
temperature than the ambient air in the freezer compart
ment drawn in by the suction fan 64. The water in the
tray pockets 4-2 is thus subjected to a much lower tem
perature than has been possible or customary in the
known freezing devices of this type and begins to solidify
in a much shorter period of time than has heretofore
been possible.
Concurrently with the foregoing, the output shaft 60
of the motor 59 drives the reducing tgear mechanism 63
which is so constructed that the output shaft 66 thereof
rotates at a much slower speed, for example, to make
one complete revolution per hour or hour and a quarter,
‘depending on the freezing time. At this particular point
of the freezing cycle, it may be assumed that the cam
- arm 67 is disposed at a downward slant out of the plane
of the paper as seen in FIG. 1 and that, therefore, the
ejection cam 69 is still lying ?at ‘against the outer surface
67b of the arm 67. After a period of approximately 20
minutes, the shaft 66 will have been rotated sufliciently
the blade 91} scrapes any ice particles which have formed 50 far that the cam arm 67 extends at a small downward
in the tube 33 ‘from the surface of the latter. In this
slant into the plane of the paper as seen in FIG. 1. At
manner, the loosened ice particles will be swept into the
this time, the arm or projection 88 engages the curved
tray or mold 39 when the next charge of water flows
contact surface 56b of the extension 560 of the arm 56
through the inlet tube 33.
(see FIG. 8) and rocks the latter upwardly to retract the
Associated with the scraper blade $30 is an arrangement
latch member 53 from beneath the tray frame 40. The
for controlling the flow of water to be frozen through the
tray 39 is thus permitted to drop from its horizontal,
valve 35 and the tube 33. As clearly shown in FIG. 9,
solid-line position shown in FIG. 1 to its broken~line posi
there is ai?xed to the scraper blade % adjacent the free
tion. Although the water in the various pockets 42 of the
end thereof, i.e., that end which is located immediately
tray is not yet completely frozen, it will be understood
adjacent the valve ‘mounting plate 34, a small contact ele 60 by those skilled in the art that the water is partly frozen
ment or plate 91 which is insulated ‘from the remainder
into solid shells of ice each having a still ?uid core of
of the blade 90 as well as from all other parts of the ap
water. Thus, despite the fact that the tray drops against
paratus. The width of the contact plate 91 is such that
the abutment bar 30 before the water is entirely frozen,
it can bridge the gap between a pair of terminals 92
this entails no disadvantage for the present invention since
65
mounted on the inside of the tube 33 and connected by
no water can spill out of the tray.
means of leads 93 to the terminals 37 of the solenoid
As the rotation of the shaft 66 continues and brings
valve 35. The circuitry is such that the coil of the sole
the arm 67 into its horizontal position directed into the
noid valve is energized to open the valve only when the
plane of the paper as seen in FIG. 1, the outer surface
terminals 92 are connected to one another by the contact
70a of the small cam 70 comes into engagement with the
70
plate 91. The position of the element 91 is so chosen, in
adjacent edge 40a of the tray frame 40 vand pushes the
accordance with the present invention, that the terminals
latter toward the member 23b of the supporting frame
92 are connected to one another ‘only when the tray 39
23, which pushing action causes a slight indenting of the
is tilted upwardly, and that the connection between these
tray pockets 42 by the abutment bar 30, as clearly shown
terminals is broken approximately at the time that the 75 in FIG. 4. The still not completely frozen cubes in the
ace-sees
E5
tray 39 will, consequently, be slightly loosened from the
inner surfaces of their respective pockets 42 without,
however, being ejected from the latter. There is no
danger, in the system according to the present invention,
that this loosening process will result in any spilling of
water ‘from the mold.
This is due to the fact that not
only were the ice cubes already in solid shell form, but
during the few minutes preceding the contact between
the cam 70 and the tray frame 46‘ the cubes were located
in the immediate vicinity of the duct 87 and were, there
fore, subjected to the flow of extremely cold air issuing
therefrom, which cold air in those few minutes effected an
accelerated freezing of whatever water was still left in
and shifts the switch arm'76 so as to open switch '77 and
interrupt the operation of the motor 5h. When this con
dition obtains, no further ejection of ice cubes can take
place and, of course, no re?lling of the tray can take
place since the contact element $1 remains stationary
and does not engage the ‘terminals 92. Only when the
excess ice cubes have been removed from the ?ange 73
can another operational cycle be initiated.
From the foregoing it will be appreciated that the pres
ent invention leads to a number of advantages unattain
able by any of the known ice cube freezing devices. For
example, in the known devices the ice cube tray is al
ways located in one position, usually either on the surface
covering the refrigerating coils of the freezer compartment
the tray pockets 42 to an extent much greater than could
be accomplished in known devices of this type even over 15 or on ‘a metallic plate connected to that surface. In either
case, the freezing of the water takes place by conduction
much longer periods of time. In this connection it is to be
which, as will be readily understood by those skilled in
noted that the supporting frame 23 additionally functions
the art, is a relatively slow process. The major disad
as a type of shield or separator between the region in
vantage of this type of freezing action, which may take as
which the tray is located and the remainder of the freezer
compartment, thereby ensuring that the cold air from the 20 long as two hours or more for each trayful of water, is
that the supply of ice cubes may run short in the event of a
duct 87 is substantially completely used for freezing the
sudden heayy demand therefor. The present invention
water in the tray and does not diffuse into the remainder
eliminates this disadvantage by employing a forced ?ow
of the compartment until its freezing action has been per
of frigid air directed against the bottom of the tray, as a
formed.
During the so far described part of the rotation of 25 result of which it is found that each ‘tray-load of ice cubes
is formed in approximately one-half the time required
the shaft 66, the cam 69 is still hanging downwardly from
by the conventional freezing methods. This accelerated
the trailing edge 67a of the arm 67, so that the tray does
freezing, as effected lby the present invention, is enhanced
not hinder the upward movement of the arm. When the
by virtue of the fact that the water in the tray, after
arm 67 passes its upwardly vertical position and begins
its downward movement, however, the cam 69 falls over 30 being initially partly frozen by a stream of frigid air
traveling over ‘a considerable distance, is then brought
against the arm surface 6717, thus placing the outer sur
into the immediate vicinity of the said stream of air.
face 69a of the cam in position for engaging the roller
40' carried by the tray frame 40 (see FIG. 5). The cam
69, upon sliding past the tray as the arm rotates, forces
the tray frame a considerable distance toward the support
ing frame member 23b, as a result of which the tray
pockets 4-2 are greatly deformed by the abutment bar 30.
The by now completely solid ice cubes 94 are thus posi
tively ejected from the tray and fall through the opening
In this connection, it is to be noted that other means than
a suction fan may be employed for bringing about the
forced ?ow of cold air required by the present invention.
It will further be appreciated that in a broad sense the
present invention contemplates the performance of an ice
cube freezing operation in two stages. In the ?rst of
these stages the ice cube tray ?lled with water is disposed
31 in the bottom member 230 of the frame 23 into the 420 substantially horizontally, for example, in the immediate
vicinity of the upper horizontal cooling coil of the freezer
This ejection is accomplished rapidly
compartment, while in the second stage the tray, now ?lled
and without requiring too powerful a motor 59 due to the
with partly formed ice cubes as hereinbefore described, is
fact that the preceding loosening of the cubes by the small
storage bin 71.
cam 70 considerably facilitates the ?nal separation of the
cubes of the inner surfaces of the tray pockets 42.
disposed substantially vertically, i.e., in the immediate
again becomes effective to swing the tray upwardly past
ture and structural arrangements are subject to a number
of changes and variations none of which involves any de
vicinity of the vertical freezing or cooling coils of the
freezer compartment. In its more speci?c form, of course,
It will be understood that as the cam 69 pushes the tray
the present invention provides that the normal freezing
39 toward the frame member 23b, considerable reaction
action of the aforesaid cooling coils of the freezer com~
forces may be exerted on the member 23a and on the
partment is supplemented by a ?ow of frigid air around
motor mounting 58. it is for the purpose of avoiding any
possible damage to the affected parts of the device that the 50 the ice cube tray in all of the positions thereof, which air
has itself ?rst been subjected to the cooling action of the
supporting frame 23 is mounted on the rod 25, whereby
freezer compartment coils.
the frame as a unit can rock slightly about the axis of
It will be understood that the foregoing description of
the rod 25 accompanied at worst by only a slight de?ec
the apparatus according to the present invention is for the
tion of the member 23b.
purpose of illustration only and that the disclosed struc
As soon as the tray is emptied, the counterweight 51
the latch member 53 and into an upwardly slanted posi
tion (not shown) in Which the roller 40" engages the stop
member 52 affixed to the supporting frame member 23a.
The contact element 91 now bridges the gap between the
electrical terminals 92 mounted in the feed tube 33, where
by the solenoid valve 35 is actuated to permit water to
how from conduit 38 into the tray 39‘. As the tray
pockets 42 become ?lled, the tray begins to return to
its horizontal position against the action of the counter
weight 51, until at the time the pockets are completely
?lled with the desired quantity of water the tray becomes
horizontal and the contact element 91 leaves the terminals
92, deactuating and closing the solenoid valve 35 to pre
vent further ?ow of water into the tray.
The entire ‘operational cycle heretofore described is now
repeated, and thereafter over and over again, until the bin
71 becomes ?lled with cubes 94.
As soon as some of
the cubes spill over onto the ?ange 73, the latter is weighed
down and moved slightly to the left (as shown in FIG. 1)
parture from the spirit and scope of the present invention
as set forth in the appended claims. Merely by way of
example, other types of valves, not actuatable by means
of a solenoid, may be employed in lieu of the valve 35,
and different cam arrangements could be used in lieu of
the means e’/_ea-7e.
Having thus described my invention, what I claim and
. desire to secure by Letters Patent is:
1. In an automatic ice cube freezing and harvesting
apparatus; ice mold means adapted to contain water to be
frozen into ice cubes, means mounting said ice mold
means for pivotal movement between a substantially hori
zontal position and a downwardly slanted position, air
flow means for effecting a forced ?ow of cold air over
said ice mold means and comprising duct means adapted
to discharge said cold air at ‘a location adjacent one of
said positions of said ice mold means, and means oper
75 able to retain said ice mold means in said horizontal posi
9
3,048,986
tion for an initial portion of the freezing period for the
water therein and to release said ice mold means to swing
under the weight of the partially frozen water therein
to said downwardly slanted position for a ?nal portion of
the freezing period.
2. In an apparatus according to claim 1; said ice mold
means comprising a deformable elastic body for con
taining said water, and cam means operable for engaging
said ice mold means to effect a deformation of said body
and the consequent ejection of formed ice cubes from
said body.
3. In an apparatus according to claim 2; motor means
operatively connected to said cam means for moving the
it)
feed pipe means will be scraped off the interior surface
of the latter to prevent clogging of said feed pipe means.
10. In an apparatus according to claim 9; counter
weight means carried by said ice mold means at one side
5 of the axis of pivotal movement thereof, the balance
conditions of said counterweight means and said ice mold
means being predetermined to ensure movement of said
ice mold means when empty to an upwardly slanted posi
tion and when ?lled to said horizontal position.
11. In an apparatus according to claim 10; solenoid
valve means controlling the inlet to said feed pipe means,
a pair of spaced electrical terminals arranged in said
feed pipe means and constituting a part of the energiza—
same at the proper time during each freezing cycle into
tion circuit for said solenoid valve means, and a contact
engagement with said ice mold means to effect the ice— 15 element carried by said scraper blade means and dimen
ejecting deformation of said body.
sioned to bridge the gap between said electrical terminals,
4. In an apparatus according to claim 3; said air flow
said contact element being positioned on said scraper
means comprising fan means, conduit means for con
ducting air from said fan means to said duct means, said
motor means being operatively connected with said fan
means for driving the same jointly with said cam means,
and means located adjacent the path of ?ow of said air
from said fan means to said duct means for reducing the
temperature of said air prior to arrival of the latter at said
blade means so as to be out of contact with said terminals
whenever said ice mold means is in said horizontal and
downwardly slanted positions thereof and so as to be in
contact with said terminals only when said ice mold means
is slanted upwardly relative to said horizontal position.
12. In combination with a household refrigerator hav
ing a freezer compartment; an ice cube tray pivotally
duct means.
25 mounted in said freezer compartment for angular move
5. In an apparatus according to claim 3; said cam
ment between an upwardly slanted water-receiving posi
means comprising a ?rst relatively smaller cam and a sec
tion, a substantially horizontal position and a down
ond relatively larger cam, said ?rst cam upon engaging
wardly slanted position, a valved feed pipe which
said ice mold means effecting a relatively minor deforma
communicates with said tray and is open when the latter
tion of said body to cause loosening of formed ice cubes 30 is in said upwardly slanted position thereof and closed
within said body, and said second cam effecting a rela
when said tray is in said horizontal and downwardly
tively major deformation of said body to cause the previ
slanted positions thereof, and means mounted in said
ously loosened ice cubes to be ejected from said body.
freezer compartment for effecting a forced flow of cold
6. In an apparatus according to claim 5; supporting
air over said ice cube tray in said horizontal and down
frame means mounting said motor means, said cam 35 wardly slanted positions thereof to cause accelerated
means, said fan means and said retaining means, and
freezing of the water in said tray in the respective
abutment means carried by said supporting frame means
positions.
at a location adjcent said downwardly slanted position of
13. in combination with a household refrigerator hav
said ice mold means and opposite the region of action of
ing a freezer compartment; an ice cube tray having a
said cam means, whereby said cam means when engaging
said ice mold means press the latter toward said abutment
means and cause said body of said ice mold means to be
deformed by said abutment means.
7. In an apparatus according to claim 6; storage bin
rigid frame and a resiliently deformable elastic plastic
body supported by said frame, stationary pivot means
mounted in said freezer compartment, said ice cube tray
being swingably connected ‘with said pivot means for
angular movement between an upwardly slanted water
means positioned below said ice mold means and said 45 receiviug position, a substantially horizontal position and
supporting frame means, said mounting means for said
a downwardly slanted position, an abutment member
ice mold means being located within the con?nes of said
supporting frame means, and said supporting frame means
being open intermediate said ice mold means and said
storage bin means to permit ice cubes ejected from said
ice mold means to fall into said storage bin means, and
quantity-responsive means operatively connected with
said storage bin means and operable to interrupt the
operation of said motor means upon accumulation of a
predetermined quantity of ice cubes in said storage bin
means.
8. In an apparatus according to claim 7; said quantity
the length of ‘which is coextensive with the length of said
body, said abutment member being positioned in said
freezer compartment adjacent said downwardly slanted
position of said ice cube tray, means for e?ecting a
forced ?ow of cold air over said ice cube tray in said
horizontal and downwardly slanted positions thereof to
cause an accelerated freezing of the water in said tray,
and cam means operable for engaging an adjunct of said
frame of said ice cube tray for pushing said body of said
ice cube tray against said abutment member, whereby
said body is deformed and formed ice cubes are ejected
from said tray.
?ange means pivotally connected to one side Wall of said
14. The combination set forth in claim 13, further
storage bin means at a level below the top plane of said
comprising an electric motor operatively connected to
storage bin ‘means, said motor means being provided with
said cam means for bringing the latter into engagement
switch means having an operating arm disposed in the
‘with said adjunct of said frame of said ice cube tray
path of movement of said flange means, whereby upon
at a predetermined time during each freezing cycle, said
movement of said flange means out of the rest position
means for effecting said forced ?ow of cold air compris
thereof due to ice cubes spilling over onto said ?ange 65 ing a fan for drawing air from the interior of said
means, said operating arm of said switch means is moved
freezer compartment, and along the cooling coils asso
responsive means comprising substantially trough-shaped
to interrupt operation of said motor means.
9. In an apparatus according to claim 8; feed pipe
means adapted to conduct water to be frozen into said
ice mold means, said feed pipe means constituting a
part of said mounting means for said ice mold means,
and scraper blade ‘means carried by said ice mold means
for movement therewith and extending into said feed
ciated with said freezer compartment, and a duct for
directing the so cooled air toward said ice cube tray from
below the same, said electric motor being drivingly con
nected to said fan.
15. In combination with a household refrigerator hav
ing a freezer compartment; a supporting frame of sub
stantially U-shaped cross-section and having a central
pipe means, whereby upon pivotal movement of said ice
bottom member and a pair of upstanding side members
mold means ice particles which have accumulated in said 75 at the opposite ends of said bottom member, ?rst pivot
8,048,986
12
11
tion, a feed pipe for directing water into said tray, a valve
controlling said feed pipe, a member connected to and
movable with said tray and controlling the operation
means mounted in said freezer compartment, said sup
porting frame having the uppermost edge of one of said
ide members connected to said ?rst pivot means for
of said valve so that the latter is closed when said tray
the other of said side members of said supporting frame CI is in said horizontal and downwardly slanted positions,
and open only when said tray moves to said upwardly
being shorter than said one side member and normally
slanted position thereof, and means for effecting a forced
in face to face engagement with a side wall of said
flow of cold air over said tray when ?lled with water
freezer compartment, said bottom member of said sup
and located in both said horizontal and downwardly
porting frame being provided with an opening, an ice
cube tray having a rigid frame and a deformable elastic 10 slanted positions thereof to effect an accelerated freezing
of said water in the respective positions.
plastic body connected to the same, second pivot means
17. In an apparatus according to claim 16; means oper
mounted in said freezer compartment within the con
able to releasably hold said tray, when ?lled, in said
?nes of said supporting frame, said ice cube tray being
horizontal position, and cam means operable to render
connected with said second pivot means for angular move
said holding means ineffective after a predetermined time
ment between an upwardly slanted Water-receiving posi
permitting rocking movement of said supporting frame,
interval so as to permit said tray to move to said down
tion, a substantially horizontal initial freezing position
wardly slanted position thereof.
and a downwardly slanted ?nal freezing position, a feed
18. in an apparatus according to claim 17; said tray
pipe for directing water into said tray, a valve controlling
comprising a resiliently deformable body for containing
said feed pipe, said valve being open in response to loca
tion of said tray when empty in said upwardly slanted 20 said water, and said cam means being further operable
to effect a deformation of said body and the consequent
position thereof and closed in response to location of said
ejection of formed ice cubes from said body while said
tray when ?lled in said horizontal position thereof, an
tray is in said downwardly slanted position.
abutment member carried by said other side member
19. In an automatic ice cube freezing and harvesting
of said supporting frame and having a length which is
apparatus; resiliently deformable ice mold means adapted
coextensive with the length of said body of said ice cube
to contain Water to be frozen into ice cubes; means
tray, said abutment member being located at said down
mounting said ice mold means for pivotal movement
wardly slanted position of said ice cube tray, an electric
between an upwardly slanted position, a substantially
motor mounted on said one side member of said sup
horizontal position and a downwardly slanted position,
porting frame and provided with ?rst and second output
shafts, a suction fan mounted on said one side member 30 counterweight means connected with said ice mold means
of said supporting frame exteriorly of the con?nes of
the latter and connected to said ?rst output ‘shaft to be
driven thereby, said suction fan when driven drawing
air from that section of said freezer compartment out
side said supporting frame, conduit means for directing
said drawn air from said suction fan along the refrig
erating coils associated with said freezer compartment
and operable to move said ice mold means when empty
to said upwardly slanted position, air ?ow means for
effecting a forced ?ow of cold air over \said ice mold
means and comprising means de?ning a duct adapted to
*" discharge said cold air at a location adjacent said ice
mold means, means operable to releasably retain said
ice mold means when ?lled in said horizontal position
thereof until rendered ineffective so as to permit move
ment of said ice mold means to said downwardly slanted
to enable cooling of said drawn air, a duct communi
cating with said conduit means and extending upwardly
therefrom through said opening in said bottom member
of said supporting frame for directing the cooled air
toward said ice cube tray from below the same, reducing
gearing connected to said second output shaft of said
position thereof, feed pipe means for directing water
to be frozen into said ice mold means, valve means con
trolling said feed pipe means and responsive to the loca
tion of said ice mold means so as to be open only upon
location of said ice mold means in said upwardly slanted
position and so as to be closed upon location of said
ice mold means in said horizontal and downwardly slanted
positions, and ‘means for effecting a deformation of said
ice mold means and consequent ejection of ice cubes
therefrom upon said ice mold means being located in
electric motor, cam means operatively connected to said
reducing gearing and driven thereby and adapted to en
gage an adjunct of said frame of said ice cube tray
when the latter is in said downwardly slanted position
so as to displace said tray frame angularly in the direc
tion of said abutment member, whereby said body is
deformed and formed ice cubes ejected therefrom, latch
said downwardly slanted position.
means mounted on said one side member of said sup
References Cited in the file of this patent
porting frame and for holding said tray in said hori
zontal position thereof when ?lled with water to be frozen,
UNITED STATES PATENTS
means driven by said reducing gearing for releasing said
latch member so as to permit movement of said tray 55
under the weight of frozen water therein to said down~
wardly slanted position thereof, and a storage bin posi
tioned below said supporting frame and adapted to receive
ice cubes ejected from said tray and falling out of said
supporting frame through said opening in said bottom
member of the latter, said storage bin being provided
60
‘with means for interrupting the operation of said electric
motor upon accumulation of a predetermined quantity
of ice cubes in said storage bin.
16. in an automatic ice cube freezing and harvesting 65
apparatus; an ice cube tray mounted for pivotal move
ment between an upwardly slanted position, a substan
tially horizontal position and a downwardly slanted posi
912,873
1,127,104
1,510,147
1,748,043
1,844,522
2,064,655
2,077,820
2,429,851
2,487,408
2,522,651
2,718,125
2,732,690
2,907,183
2,942,435
‘McCall ______________ __ Feb. 16,
Souther _______________ __ Feb. 2,
Keith _______________ __ Sept. 30,
Grupe _______________ __ Feb. 18,
Oster _________________ __ Feb. 9,
Geyer _______________ __ Dec. 15,
Arp _________________ __ Apr. 20,
Swann _______________ __ Oct. 28,
Askin ________________ __ Nov. 8,
Van Vleck ___________ __ Sept. 19,
Horvay ______________ __ Sept. 20,
Henderson ____________ __ Jan. 31,
Roberts _______________ .__ Oct. 6,
Nelson ______________ __ June 28,
1909
1915
1924
1930
1932
1936
1937
1947
1949
1950
1955
1956
1959
1960
Документ
Категория
Без категории
Просмотров
0
Размер файла
1 363 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа