U.S. patent number 3,913,343 [Application Number 05/410,769] was granted by the patent office on 1975-10-21 for sanitary ice storage and dispensing apparatus and method.
Invention is credited to Michael L. Rowland, George C. Stephens.
United States Patent |
3,913,343 |
Rowland , et al. |
October 21, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
Sanitary ice storage and dispensing apparatus and method
Abstract
An ice dispensing device including a storage receptacle for
containing a quantity of ice cubes which can have an automatic ice
maker attached to said receptacle to supply ice cubes to said
receptacle. An ice cube agitator positioned adjacent the bottom of
said receptacle and having an inclined blade attached to rotate
about an inclined shaft. A dispensing means for dispensing measured
quantities of ice cubes from said receptacle without contamination.
Control means are provided for periodically operating the agitator
means and for refilling the dispensing means to assure correct
quantity dispensing.
Inventors: |
Rowland; Michael L. (Houston,
TX), Stephens; George C. (Houston, TX) |
Family
ID: |
26849742 |
Appl.
No.: |
05/410,769 |
Filed: |
October 29, 1973 |
Related U.S. Patent Documents
|
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
152658 |
Jun 14, 1971 |
|
|
|
|
Current U.S.
Class: |
62/137; 62/344;
222/318; D15/80; 222/241 |
Current CPC
Class: |
F25C
5/20 (20180101) |
Current International
Class: |
F25C
5/00 (20060101); F25C 005/18 () |
Field of
Search: |
;222/318,241,76,233,146C
;259/97,42 ;62/344,137 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Wayner; William E.
Attorney, Agent or Firm: Richards, Harris & Medlock
Parent Case Text
This application is a continuation-in-part of application Ser. No.
152,658, filed June 14, 1971, now abandoned, for ICE MAKING AND
DISPENSING APPARATUS AND METHOD.
Claims
We claim:
1. An ice cube vending machine comprising:
receptacle means for storing a volume of ice cubes;
a first means in communication with said receptacle means at a
point spaced above the lowermost portion of said receptacle means
for receiving ice cubes retained in said receptacle means and
alternatively dispensing and mixing said ice cubes in said
receptacle; said first means comprises a screw auger means for
conveying ice cubes from a first point spaced above the lowermost
portions of said receptacle means to a second point elevated above
said first point, means supporting said auger means in said
receptacle, and valve means attached to the elevated end of said
auger means for selectively diverting ice cubes conveyed by said
auger means into the upper portion of said volume of ice cubes
stored in said receptacle means and out of said receptacle
means;
a second means provided in said receptacle means for first
vertically lifting and thereafter dropping portions of the ice
cubes in said receptacle to agitate said ice cubes, and thereby
eliminate bridging and fusion of said ice cubes in said
receptacle;
means periodically operating said first and second means; and
an ice manufacturing means connected to said receptacle to supply
ice cubes thereto.
2. A machine as defined in claim 1 wherein said screw auger means
is inclined within said receptacle means.
3. A machine as defined in claim 1 additionally comprising a
dispensing chute means connected to said valve means for delivering
ice cubes out of said receptacle means.
4. An ice cube vending machine comprising:
receptacle means for storing a volume of ice cubes;
selectively operable first means in communication with said
receptacle means adapted to receive ice cubes retained in said
receptacle means for selectively dispensing said ice cubes from
said receptacle means;
second means positioned in the bottom of said receptacle means for
first vertically lifting and thereafter dropping portions of the
ice cubes in said receptacle to agitate said ice cubes, and thereby
break up bridging and fusion of adjacent ice cubes in said
receptacle, said second means comprising an impeller blade mounted
to rotate about an axis in said receptacle in an area spaced above
the lowermost portion of said receptacle, surface means on said
blade extending from said axis through an angle less than
360.degree. for lifting a portion of the ice in said bin onto said
blade and abruptly dropping ice from the blade surface;
control means periodically operating said second means to thereby
periodically break up bridging and fusion between adjacent ice
cubes; and
ice manufacturing means connected to said receptacle to supply ice
cubes thereto.
5. A machine as defined in claim 4 wherein said first means
comprises a screw auger.
6. A machine as defined in claim 4 additionally comprising control
means for energizing the ice cube manufacturing means when the ice
in said receptacle is less than a predetermined amount.
7. A machine as defined in claim 4 wherein said axis is vertically
inclined in said receptacle.
8. A machine as defined in claim 7 wherein said blade is inclined
with respect to said axis.
9. An ice cube vending machine comprising:
receptacle means for storing a volume of ice cubes;
a first means in communication with said receptacle means at a
point spaced above the lowermost portion of said receptacle means
for receiving ice cubes retained in said receptacle means and
alternatively dispensing and mixing said ice cubes in said
receptacle;
a second means positioned in the bottom of said receptacle means
for first vertically lifting and thereafter dropping portions of
the ice cubes in said receptacle to agitate said ice cubes, and
thereby eliminate bridging and fusion of said ice cubes in said
receptacle, said second means comprising an impeller blade mounted
to rotate about an axis in said receptacle in an area spaced above
the lowermost portion of said receptacle, surface means on said
blade extending from said axis through an angle less than
360.degree. for lifting a portion of the ice in said bin onto said
blade and abruptly dropping ice from the blade surface;
means periodically operating said first and second means; and
ice manufacturing means connected to said receptacle to supply ice
cubes thereto.
10. A machine as defined in claim 9 additionally comprising control
means for energizing the ice cube manufacturing means when the ice
in said receptacle is less than a predetermined amount.
11. A machine as defined in claim 9 wherein said impeller blade is
inclined with respect to said impeller axis.
12. An apparatus as defined in claim 11 wherein said axis of said
impeller is vertically inclined in said receptacle means.
13. An ice cube vending machine comprising:
receptacle means for storing a volume of ice cubes;
a first means in communication with said receptacle means at a
point spaced above the lowermost portion of said receptacle means
for receiving ice cubes retained in said receptacle means and
alternatively dispensing and mixing said ice cubes in said
receptacle;
a second means provided in said receptacle means for first
vertically lifting and thereafter dropping portions of the ice
cubes in said receptacle to agitate said ice cubes, and thereby
eliminate bridging and fusion of said ice cubes in said receptacle,
said second means comprises a semicircularly shaped impeller blade
and means mounting said impeller blade to rotate about an axis
within said receptacle means at a point spaced above the lowermost
portion of said receptacle;
means periodically operating said first and second means; and
an ice manufacturing means connected to said receptacle to supply
ice cubes thereto.
14. An automatic ice cube vending machine comprising in
combination:
a frame;
a sealed sanitary receptacle means defined by said frame for
storing a volume of ice cubes;
means mounted on said frame for manufacturing ice cubes;
delivery means connecting said ice cube manufacturing means and
said receptacle means for delivering ice cubes to said receptacle
means;
ice cube dispensing and mixing means in communication with said
receptacle means positioned at a point spaced above the lowermost
portion of said receptacle means and adapted to receive ice cubes
retained in said receptacle means for selectively dispensing said
ice cubes from said receptacle means and mixing said ice cubes in
said receptacle, said mixing and dispensing means comprising a
screw auger means mounted for conveying ice cubes from said
receptacle, said screw auger having a shaft and a screw blade
attached to rotate therewith, valve means attached to the elevated
end of said auger means for selectively diverting ice cubes
conveyed by said auger means into the upper portion of said
receptacle means and out of said receptacle means, and dispensing
chute means connected to said valve means for delivering ice cubes
out of said receptacle means;
movable ice cube agitating means provided in said receptacle means
for first vertically lifting and thereafter dropping a portion of
the ice cubes in said receptacle to agitate said ice cubes, and
thereby break up bridging and fusion between adjacent ice cubes in
said receptacle, said agitating means comprising a semicircular
shaped impeller blade inclined with respect to and attached to
rotate with the lowermost portion of said auger shaft;
power means connected to rotate said auger shaft;
first control means for operating said power means and opening said
valve means to dispense ice cubes from said receptacle; and
second control means periodically operating said power means and
closing said valve means to break up bridging and fusion between
adjacent ice cubes.
Description
The present invention relates to improvements in ice dispensing and
storage apparatus and methods of operating the same. In another
aspect, this invention relates to improvements in the breaking up
of fusion and bridging between adjacent ice cubes in the storage
receptacle and improvements in the dispensing means for dispensing
measured quantities of ice cubes from the ice storage
receptacle.
In the provision of ice at hotels, motels, restaurants, filling
stations, marinas, drive-in groceries, shopping centers,
recreational facilities and the like, it has been a general
practice to store ice in a receptacle to be manually removed as
required. Although such devices have served the general purpose,
they have not proved entirely satisfactory under all conditions of
service for the reason that the ice supply bins were unsanitary and
open to the public, allowing the ice therein to become
contaminated. In addition, ice could be pilfered by those not
having legitimate access thereto.
The need for solving the problems of elimination of contamination
of ice has become an even more acute problem due to recent actions
by federal and state health officials requiring minimum standards
of sanitation for the dispensing of ice at public facilities. As a
consequence, the open ice bin that has been common in many hotels,
motels, apartments, etc. has come into disfavor.
To overcome the sanitation problems, it was proposed that a
completely closed ice receptacle be used with automatic dispensing
means to remove the ice cubes from the receptacle and deliver the
cubes to the customer as desired. It was further proposed that
conventional designs for dispensing apparatus which had been used
with products other than ice be used to dispense the ice cubes from
the receptacle.
Although these conventional systems were satisfactory to store and
dispense other particulate materials, they have not proved
satisfactory to solve the unique problems present in the field of
the sanitary dispensing of particulate ice cubes.
When a quantity of ice cubes is constrained within the upstanding
walls of a receptacle, unique problems are present in that the
individual ice cubes are not necessarily supported by the ice cubes
located directly therebelow. This is due to the fact that fusion
between adjacent ice cubes at contact points takes place. Thus, a
cube of ice is often supported by fusion to other cubes located
above or to one side. This fusion between adjacent cubes can create
arches, columns and beams within the receptacle which are, in turn,
supported by fusion to the receptacle walls and bottom. The
quantity of ice in the receptacle can thus become rigid and
self-supporting with varied paths of support of the cubes within
the receptacle.
It has also been discovered that the longer the period that the
cubes in the receptacle are left at rest, the stronger the fusion
bonds between adjacent cubes become and the more rigid and
difficult the breaking of these fusion bonds becomes. Due to the
fact that long periods of time can exist between the successive
dispensing operations from the receptacle, these fusion bonds
between adjacent cubes and the walls of the receptacle can present
material problems in the dispensing of ice from the receptacle by
conventional gravitational feed means. Thus, the feeding of ice
cubes by the force of gravity from a receptacle by conventional
means over long periods of time can become impractical.
In addition, it has been found that ice cubes stored in a
receptacle can change in size and weight over a period of time due
to evaporation and melting. This can be caused by reduced
temperature in portions of the receptacle, pressure forces between
adjacent ice cubes and the walls of the receptacle and the like.
This reduction in size and weight of the individual cubes can
create problems in the dispensing of a fixed portion if a time
lapse is present between successive portion measuring and
dispensing operations.
Therefore, any acceptable ice storage and dispensing apparatus must
successfully solve the ice bridging and fusion problems to dispense
ice from a storage receptacle over a period of time and must
provide a means for consistently dispensing a fixed portion of ice
cubes.
According to one aspect of the present invention, an improved
sanitary automatic ice cube storage and dispensing apparatus is
provided with an improved agitation means which is periodically
operated to agitate the ice to break up fusion bonds between
adjacent ice cubes.
According to another aspect of the present invention, an improved
sanitary automatic ice cube storage and dispensing apparatus is
provided with means periodically refilling the measuring portion of
the apparatus to insure dispensing of a complete fresh portion of
ice.
In accordance with the present invention, an improved ice cube
dispensing apparatus is provided including an ice storage
receptacle which can be placed in communication with an automatic
ice maker. Disposed within the receptacle, and extending upwardly
from the base thereof is a dispensing conveyor for transporting the
cubes within the receptacle to a dispensing chute. The conveyor
includes an auger mounted for rotation within a housing, the
housing includes an overflow opening and a dispensing opening at
the top end thereof, the dispensing opening being in communication
with the dispensing chute. Means are also provided to automatically
operate the auger and to open or close off the dispensing opening
thus circulating ice cubes through the auger to thereby either
dispense the ice cubes from, or return them to the storage
receptacle. Improved ice agitation means, including an impeller
blade uniquely affixed to the shaft of the auger adjacent to the
bottom of the receptacle, accomplishes break up of the fusion of
the ice disposed within the receptacle by vertically lifting and
dropping portions of the ice cubes in the receptacle. Means are
provided for actuation of the impeller agitator during the
dispensing operations and during defined periods therebetween.
Additional features and advantages of the invention will be readily
appreciated by those of ordinary skill in the art as the same
becomes better understood by reference to the following detailed
description when considered in connection with the accompanying
Drawings, in which:
FIG. 1 illustrates a perspective view of the preferred embodiment
of the automatic ice making and dispensing apparatus of the present
invention;
FIG. 2 illustrates a front elevation of the apparatus illustrated
in FIG. 1 with the lower cover removed therefrom;
FIG. 3 illustrates a partial section of the device taken on lines
3--3 of FIG. 2 looking in the direction of the arrows;
FIG. 4 is a view identical to FIG. 3 showing the ice dispensing
apparatus in the ice dispensing cycle;
FIG. 5 is a view identical to FIG. 4 showing the ice dispensing
apparatus in the ice agitation cycle;
FIG. 6 illustrates a partial section of the device showing the
improved ice agitator taken on line 6--6 of FIG. 3 looking in the
direction of the arrows; and
FIG. 7 illustrates a partial section of the device showing the
auger assembly taken on line 7--7 of FIG. 3 looking in the
direction of the arrows.
Referring now to the Drawings, wherein like reference characters
designate like or corresponding parts throughout the several views,
there is initially illustrated in FIG. 1 a coin-operated ice making
and dispensing apparatus 10 which embodies the features of the
present invention. The entire apparatus can be supported on a floor
or other flat surface by means of a plurality of legs 12 which are
desirably adjustable in length to accommodate variations in the
floor surface.
Apparatus 10 includes an enclosure or cabinet structure 26 upon
which can be mounted an ice maker assembly 14. The illustrated ice
maker 14 can be of a conventional design known in the art and
commercially available which is effective to produce a quantity of
ice cubes which are received by a receptacle 28 (FIG. 3) disposed
within the cabinet structure 26 and in communication with ice maker
14. Ice maker 14 (as well as the overall apparatus 10) is
preferably electrically powered, but it is contemplated that gas,
butane or other forms of power may also be utilized therefor.
It is preferred that the ice maker assembly 14 be of the type which
has means to sense the amount or level of the ice stored or
contained in a bin or receptacle 28. This sensing means could be a
capillary tube or other temperature sensor 13 which is located
within receptacle 28 at a desired ice level height in the upper
portion of receptacle 28 so that when ice is in contact with the
sensor, ice maker assembly 14 remains off and when the ice level
falls below the sensor, ice maker assembly 14 is actuated to
manufacture and dispense ice cubes into receptacle 28.
It is envisioned, of course, that the apparatus of the present
invention could be used without an ice making apparatus with the
ice being manually added to the receptacle as needed.
The term "ice cube" is used herein in the generic sense to mean
"particulate ice material" and is not intended as a geometrical
limitation of the shape of ice particles which can be manufactured
by ice maker 14 or dispensed by the overall apparatus 10 in
accordance with the present invention.
In accordance with the operation of apparatus 10, the details of
which are subsequently described, ice cubes stored within
receptacle 28 are dispensed through chute 22 into a suitable
holder, such as a paper or plastic bag 20, positioned within a
dispensing recess 18 in the front portion of cabinet 26. The
dispensing is normally effected in response to the insertion of the
correct amount of coins into a coin receiving slot 19 and the
subsequent manual closing of a vend switch 24 located above a face
plate 16, the plate 16 also having a coin return slot 21 and a coin
control mechanism (not shown) mounted therebehind. This coin
control mechanism and the related circuitry associated therewith is
immaterial for the purposes of the present invention in that many
such mechanisms are commercially available on the market, it only
being sufficient for the present purposes to state that the
dispensing of the ice into bag 20 is effected in response to the
receipt of the correct amount of coins or tokens through slot 19 or
the insertion of a card or pass key and closing of vend switch 24.
Disposed above face plate 16 is a bin empty indicator light 23, the
operation and purpose of which is subsequently described.
Referring specifically to FIGS. 2 and 3, it is observed that
receptacle 28, which houses a quantity 29 of ice cubes, includes
upstanding walls and a lower portion 30 of a generally pyramidal
shape. Preferably, receptacle 28 is formed of or coated with
fiberglass, foamed urethane, or some other suitable insulating
material to reduce the heat loss and melting of the ice
therein.
The receptacle 28 is supported by frame 33. A drip pan may be
positioned below the lower portion 30 and a drain hose 34 to
receive any liquid from the ice melting within the receptacle and
direct the liquid therefrom. Additionally, other drain hoses 35 and
37 could be utilized to remove any accumulation of liquid from the
dispensing recess 18 and ice maker 14, respectively.
Disposed adjacent or in front of frame 33 is a control box 36 which
preferably houses the control mechanisms and circuitry for
operating the various portions of apparatus 10 in accordance with
the subsequently described operation.
Disposed within receptacle 28, and preferably within the lower
portion 30, is a level switch 27 for indicating when the amount of
ice disposed with bin 28 falls below a desired minimum. This
desired minimum is set to insure that sufficient ice is present in
the receptacle to allow a complete vend and to keep the bin
sufficiently cold. While various switches known in the art may be
utilized for switch 27, one suitable device is a temperature
responsive switch which remains open as long as the ice is in
contact with (at or above the level of) switch 27. As soon as the
ice level falls below that of switch 27, the resulting rise in
temperature will be sensed by the switch and it will close, thus
energizing bin empty indicator light 23 de-energizing coin control
mechanism so that any coins placed in slot 19 will be returned to
slot 21 without effecting the dispensing operation.
In accordance with the improved feature of the present invention,
the dispensing of the ice from lower portion 30 of the receptacle
to external chute 22 is effected by way of an auger assembly 44
inclined at an angle "A" with respect to the vertical axis (FIG.
3). This assembly 44 includes a hollow key hole-shaped cross
section housing 46 as shown in FIG. 7 suitably mounted within the
receptacle 28 and a screw auger 48 rotatably mounted within housing
46. Screw auger 48 is attached to the output shaft 42 of a suitable
driving means 40 which is driven by a motor 38. Consequently, when
the motor 38 is energized, screw auger 48 will be caused to rotate
and will convey ice disposed within the housing 46 and that
adjacent to the bottom opening thereof to the upper end thereof
adjacent the chute 22. As illustrated, shaft 42 extends from
driving means 40 up through lower portion 30 of receptacle 28 and
is provided with suitable seals (not illustrated) to prevent any
leakage of the liquid from receptacle 28 along shaft 42. The upper
end of the shaft is suitably constrained by a bearing or the
like.
At the upper end of auger housing 46 are a pair of openings 50 and
52, respectively, providing the overflow and vend outlets. The vend
opening 52 preferably extends to a level below overflow opening 50,
and communicates with vending chute 22. A vend door assembly 56
positioned adjacent vend opening 52 includes a vend door member 56a
operatively connected to a solenoid assembly 58, the solenoid
assembly 58, respectively, moving vend door 56a to an open and
closed position for respectively allowing the ice which is
transported up the housing 46 to enter, or be restrained from
entering dispensing chute 22. The operation of solenoid 58 to move
door 56a to the open position (as illustrated in FIG. 4) is in
response to the insertion of coins into opening 19 of a fact plate
and subsequent actuation of vend switch 24.
When vend door 56a is in the closed position (for example FIG. 5),
any ice transported up through housing 46 will exit through
overflow opening 50 back into receptacle 28. This ability to refill
auger assembly 44 with a fresh supply of ice is of particular
advantage in insuring the dispensing of a fresh and correct
quantity of ice in each dispensing operation without regard to the
time span between each dispensing operation. This is accomplished
because the auger is periodically operated with the vend door 56a
closed by a control mechanism to cause ice cubes to be transported
into and up through auger assembly 44 out overflow opening 50, and
back into receptacle 28. This insures that before the ice in auger
assembly 44 can become stale or reduced in size through evaporation
or melting during prolonged periods of time between vend
operations, that auger assembly 44 will be operated to remove the
ice therefrom through opening 50, and fresh ice will enter auger
assembly 44 from receptacle 28. Thus, by periodically operating the
auger, a full auger is assured and reliable portion control can be
accomplished through a timed operation of the auger.
In accordance with another improved feature of the present
invention, an impeller blade 60 is attached at an angle to and
rotates with shaft 42 to enable the agitation and subsequent
breaking of the fusion between adjacent ice cubes within receptacle
28. As illustrated in FIG. 6, impeller 60 includes a cutting edge
61 and an inclined plane surface 62 afforded by attaching the
impeller 60 to the shaft 42 at an angle with respect to the axis of
shaft rotation. As illustrated in FIGS. 3, 4 and 5, the impeller 60
is inclinably attached to shaft 42, and shaft 42 is inclined at an
angle "A" with respect to the vertical axis of receptacle 28. The
inclined plane surface 62 of impeller 60 thus forms a compound
angle with respect to the vertical axis of receptacle 28.
As impeller 60 is rotated with shaft 42, the plane surface 62
successively changes its angle of inclination with respect to the
vertical axis. Adjacent ice cubes near the bottom of receptacle 28
and in contact with this inclined plane 62, are physically forced
up the inclined plane, but at differing rates of speed and at
successively varying angles to the vertical as the angle of
inclination of the plane surface varies with rotation. The cubes
thus forced generally upward are driven against those cubes
immediately above the cubes in contact with the impeller and in
turn against other cubes higher up within the receptacle 28,
thereby breaking up fusion of the ice within the receptacle.
Impeller 60 is preferably located as near the bottom of receptacle
28 as practical, since it has been discovered that ice cubes
located radially around and outside the volume swept by said
impeller 60 and below the plane swept by the upper tip of said
impeller 60, cannot by thusly agitated. It has been further
discovered that the shape of the lower portion 30 of the receptacle
28 cannot aid the gravity feed of ice cubes into the area of
agitation. In the present embodiment, the walls are preferably
shaped in the lower portion 30 of receptacle 28 to closely conform
to the perimeter of the volume swept by impeller 60 so as to reduce
the quantity of unagitated ice cubes. As illustrated in FIG. 6,
impeller 60, preferably of semicircular shape, is mounted off
center.
The shape and size of impeller 60 is such that when rotated with
shaft 42, the impeller 60 sweeps through and successively cuts
into, lifts and drops a portion of the volume 29 of ice within the
receptacle 28. The force imparted by the impeller 60 is sufficient
to break the fusion between adjacent cubes and this force is
transmitted upward and slightly outward by the action of driven
cubes coming into contact with other cubes. After the fusion
between adjacent cubes is thus broken, and after the impeller blade
60 rotates out from under the cubes thus broken apart, these loose
cubes can fall by gravity downward into the space vacated by the
impeller 60 as it rotates to a new position. Since these loose
cubes immediately begin to readhere to each other, it has been
discovered that the impeller 60 must rotate at some speed so that
it again passes under this same portion of ice cubes before fusion
can reoccur.
The force imparted by impeller 60 against the ice cubes has been
found to be dissipated with height above the impeller. This is
caused by the packing of cubes into void spaces, and horizontal
dissipation caused by cubes contacting others at random angles. The
present invention provides a storage receptacle 28 of substantial
capacity to allow sufficient accumulation of ice cubes 29 within to
meet peak demands and the agitating means is sized sufficiently to
provide agitating force and motion to the desired ice level height
in the upper portion of receptacle 28. As the impeller 60 is
rotated with shaft 42, the impeller will assume successive
positions within the receptacle 28. With each complete revolution,
it can be seen that the impeller passes under a portion of the
total horizontal cross-sectional area of the receptacle 28.
Continuous agitation of the volume 29 of ice would eventually
damage the ice cubes and reduce their desirability as saleable
products. Agitation must be forceful enough to break the fusion
between adjacent cubes and move them to prevent their immediate
refusion. A constant application of sufficient force and motion
substantially reduces size and quality of ice cubes. It is however,
only necessary to agitate and subsequently break the fusion between
adjacent ice cubes within the receptacle 28 during the time when it
is desired to convey a portion of said ice cubes out through the
dispensing means. Except during vending periods, it is of no
consequence that ice may be allowed to fuse together and bridge,
provided that the bridge or fusion should not be allowed to exist
for so long a period of time as to be too strong for impeller 60 to
break.
Inasmuch as continuous agitation is neither desirable nor
necessary, agitation and subsequent breaking of fusion between
adjacent ice cubes should occur at time intervals independent of
the agitation which would normally occur during vending or
dispensing of ice. These agitation cycles, to be subsequently
described, are sufficiently frequent as to prevent a strong fusion
bond between adjacent ice cubes and allow rapid unbridging and
separation of adjacent ice cubes during either the vending or
dispensing cycles or subsequent agitation cycles.
It is important to note that both agitation impeller 60 and auger
48 are attached to shaft 42. Thus, by operating motor 38 both
agitation of the ice within the receptacle to eliminate bridging
and circulation of ice through the auger assembly 44 to assure
proper portion control, can be accomplished simultaneously.
The operation of the apparatus 10 in accordance with the invention
can be described by reference to the following cycles:
(1) inert; (2) standby; (3) vend; and (4) agitation.
Inert Cycle
When the receptacle or bin 28 is empty, or the volume 29 of ice
therein is below level switch 27, light 23 is illuminated,
informing customers of the deficiency in the supply of ice, and the
coin control mechanism diverts any coins inserted within slot 19 to
return slot 21. As a consequence, and during this portion of the
cycle, solenoid 58 remains in its deactuated position and vend door
56a remains closed (FIG. 3). Since sensor 13 is preferably located
above level switch 27, the deficiency in the supply of ice will
also cause actuation of ice maker 14 to produce ice cubes to fill
receptacle 28 to the desired level.
Standby Cycle
As the ice produced by unit 14 is ejected into receptacle 28, the
level of the ice cubes therein rises to and above the level of
switch 27, the corresponding drop in temperature actuating switch
27 to turn off light 23 and actuate the coin control mechanism to
the "coin acceptance" mode. The unit 14 will continue to produce
ice cubes until the level of sensor 13 is reached, and in the
meantime, apparatus 10 will now automatically vend ice cubes in
response to the receipt of the correct amount of coins and manual
closing of the vend switch.
Vend Cycle
Upon receipt of the correct amount of coins within coin receiving
slot 19 and subsequent pressing of vend button 24, the control
mechanism within the housing 36 will energize motor 38 to rotate
screw conveyor auger 48 and to actuate solenoid 58 to translate
vend door 56a to its open position. As a consequence, ice cubes
within housing 46 are transported to and through the vend opening
52 where they pass through dispensing chute 22 and into bag 20
(FIG. 4).
A suitable timing mechanism contained within housing 36 controls
the period of time auger 48 is rotated and vend door 56a remains
open. By setting this timing mechanism for a prescribed time
period, the amount of ice dispensed through chute 22 can
consequently be controlled. Since, as previously described, auger
assembly 44 is always full of ice cubes, accurate control of the
amount of ice that is vended can therefore, be effected. At the end
of this prescribed time period, the control mechanism within
housing 36 de-energizes motor 38, deactuates solenoid 58 to close
vend door 56a, and the vend cycle is completed. Vend door 56a, thus
being closed, seals off the unvended ice within assembly 44 and
receptacle 28, thus preventing contamination of the unvended ice
therein, and prevents ice from being dispensed during the agitation
cycle.
Throughout the entire vend operation, and as a consequence of the
rotation of auger 48 and shaft 42, impeller blade 60 is caused to
rotate. The resulting movement of this blade 60 as a consequence of
its angular attachment to the shaft 42 thus imparts a lifting and
dropping motion to different portions of the volume 29 of ice
within the receptacle 28 as the shaft rotates, the resulting wave
motion therein advantageously and effectively agitating, breaking
up and unbridging the ice particles throughout receptacle 28.
Agitation Cycle
The timing mechanism within the control housing 36 is also
effective to periodically actuate motor 38 independent of the vend
cycle, to transport the ice cubes upwardly through housing 46 while
during this time period vend door 56a remains in a closed position.
Since vend door 56a remains closed, the so-transported ice cubes
will exit through the overflow opening 50 and fall back into
receptacle 28 (FIG. 5). At the same time, agitation and unbridging
of the ice cubes within the bin is effected, as before, by the
rotation of blade 60. Consequently, in addition to the periodic
agitation of the ice cubes within receptacle 28 during time periods
when the dispensing is not being effected, any ice which may have
partially melted within the auger assembly 44 will be removed
therefrom, and replaced to insure an accurate portion control.
As a consequence of the above-described features and operations,
apparatus 10 automatically dispenses precise amounts of sanitary
and contamination-free ice therefrom, assures the provision of a
continuous supply of ice in response to vending requirements, and
is substantially free of operating difficulties due to the
adherence and bridging of the ice cubes contained therein.
Various modifications of the disclosed preferred embodiment may
become apparent to one skilled in the art without departing from
the spirit and scope of the invention as defined by the appended
claims.
* * * * *