U.S. patent number 3,581,516 [Application Number 04/763,244] was granted by the patent office on 1971-06-01 for ice body maker collecting bin control.
This patent grant is currently assigned to Whirlpool Corporation. Invention is credited to William J. Buchser, Eric Henry Schwenker.
United States Patent |
3,581,516 |
Buchser , et al. |
June 1, 1971 |
ICE BODY MAKER COLLECTING BIN CONTROL
Abstract
An ice body maker having a mold in which ice bodies are formed
with means for ejecting the ice bodies to a collecting bin along a
preselected path. A control is provided including a holding means
which interrupts the movement of the ice bodies along the ejection
path to hold them in spaced relationship to the collecting space,
permitting them to dry. During this drying period a sensing portion
of the control moves through the collecting space to sense the
level of ice bodies therein for automatically maintaining a preset
level. During movement of the sensing portion of the control
through the collecting space, the holding means prevents the ice
bodies being ejected from the mold from falling onto the sensing
portion, thereby preventing them from being raked from the bin
defining the collecting space by the sensing portion should the bin
be removed from the ice body maker. The control is adjustable to
permit different preset levels of ice bodies in the collecting
space to be obtained as desired. The adjustment of the control may
be maintained by means of a retaining member.
Inventors: |
Buchser; William J.
(Evansville, IN), Schwenker; Eric Henry (Evansville,
IN) |
Assignee: |
Whirlpool Corporation
(N/A)
|
Family
ID: |
25067276 |
Appl.
No.: |
04/763,244 |
Filed: |
September 27, 1968 |
Current U.S.
Class: |
62/137; 222/56;
200/61.2 |
Current CPC
Class: |
F25C
5/187 (20130101); F25C 1/04 (20130101) |
Current International
Class: |
F25C
1/04 (20060101); F25C 5/18 (20060101); F25C
5/00 (20060101); F25c 005/18 () |
Field of
Search: |
;62/137,344 ;200/61.2
;222/56 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Wagner; William E.
Claims
The embodiments of the invention in which an exclusive property or
privilege is claimed as defined as follows:
1. In an ice body maker having a mold in which ice bodies are
formed, a collecting bin subjacent said mold, an ejector for
ejecting formed ice bodies from said mold, and means for
transferring said formed ice bodies along a preselected path from
said mold to said collecting bin, means for controlling the
transfer of said ice bodies and arresting the operation of said ice
body maker when the level of ice bodies in said bin rises above a
predetermined level comprising: an elongate control element having
a holding portion, a sweep portion, and a connecting portion
connecting said sweep portion fixedly to said holding portion; and
means for selectively disposing said control element with said
holding portion in a first position across said path to comprise a
means for interrupting the transfer of said ice bodies and
maintaining the ice bodies spaced from said collecting bin, and for
moving said holding portion from said first position to permit
completion of the transfer of said ice bodies to said collecting
bin, said disposing means acting through said holding portion and
said connecting portion to move said sweep portion through said
collecting bin prior to the transfer to sense the level of ice
bodies collected therein and to dispose said sweep portion out of
said collecting bin during the transfer of said ice bodies to said
collecting bin whereby accumulation of the ice bodies on said sweep
portion during the transfer of said ice bodies is prevented.
2. The ice body maker controlling means of claim 1 wherein said
element comprises a one piece, formed wire.
3. The ice body maker controlling means of claim 1 wherein said
element comprises a U-shaped wire, said holding and sweep portions
comprising the legs thereof and said connecting portion comprising
the bight thereof.
4. The ice body maker controlling means of claim 1 wherein said
connecting portion defines adjustable means for varying the
disposition of said sweep portion relative to said holding portion
whereby the predetermined level at which ice bodies are maintained
in said bin may be selectively varied.
5. The ice body maker controlling means of claim 1 wherein said
connecting portion is controlably manually bendable for varying the
disposition of said sweep portion relative to said holding portion
whereby the predetermined level at which ice bodies are maintained
in said bin may be selectively varied.
6. The ice body maker controlling means of claim 1 wherein said
holding portion is rectilinear.
7. The ice body maker controlling means of claim 1 wherein said
sweep portion is arcuate.
8. The ice body maker controlling means of claim 1 wherein said
connecting portion is arcuate.
9. The ice body maker controlling means of claim 1 wherein said
sweep portion has a distal end spaced from said holding portion and
said controlling means further includes means connecting said
distal end to said holding portion.
10. The ice body maker controlling means of claim 1 wherein said
sweep portion has a distal end spaced from said holding portion and
said controlling means further includes means adjustably connecting
said distal end to said holding portion to adjust the path of
movement of said sweep portion through said collecting space
thereby to sense any one of a plurality of different predetermined
levels of ice bodies therein.
11. The ice body maker controlling means of claim 1 wherein said
sweep portion has a distal end spaced from said holding portion and
said controlling means further includes a connector element
adjustably connecting said distal end to said holding portion.
12. The ice body maker controlling means of claim 11 wherein said
connector element comprises a strap having a first portion retained
on said holding portion and a second portion retained on said
holding portion and a second portion retained on said sweep
portion.
13. The ice body maker controlling means of claim 11 wherein said
connector element comprises a strap having a first aperture
receiving said holding portion and a second aperture receiving said
sweep portion.
14. The ice body maker controlling means of claim 1 wherein said
sweep portion has a distal end spaced from said holding portion and
said controlling means further includes a flexible plastic member
adjustably connecting said distal end to said holding portion.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to ice body makers and in particular to
controls for automatically controlling the operation thereof to
maintain a preselected level of predryed ice bodies in a collecting
bin associated therewith. The control further prevents accidental
ejection of ice bodies from the bin upon subsequent removal thereof
from the ice body maker.
2. Description of the Prior Art
In one form of improved ice body maker disclosed in Linstromberg
U.S. Pat. No. 3,280,578, owned by the assignee of the instant
invention, a mold is provided with an ejecting means for
transferring the formed bodies to a subjacent collecting bin. In
Heath U.S. Pat. No. 2,778,198, also owned by the assignee hereof,
an ice-making machine is disclosed having a modified form of
level-sensing means wherein intercepting members are operated by
the control concurrently operating the sensing arm to hold the
relatively wet ice bodies for a period of time before delivery
thereof to the subjacent collecting bin.
SUMMARY OF THE INVENTION
The present invention comprehends an improved means for controlling
the transfer of ice bodies in an ice body maker. In the structure
disclosed herein, an elongate control element is provided having
different portions providing a number of different coordinated
functions whereby an improved control of the ice body transfer is
obtained. Thus, in the present invention, the elongate control
element includes a first portion selectively interrupting the
transfer of the ice bodies from the mold to the collecting space
whereby the ice bodies may be held to permit refreezing thereof
after removal from the mold so that they will be substantially
completely dry when they are delivered to the collecting space.
The control element further includes a sweep portion spaced from
the holding portion by a connecting portion. The holding portion
retains the ice bodies during the time the sweep portion moves
through the collecting space to sense the level of ice bodies
therein and thus prevents pileup of the ice bodies on the sweep
portion during the sensing cycle. As a result of the improved
holding function, the transferred ice bodies are prevented from
being raked from the collecting space by the sweep portion should
the bin, defining said collecting space, be subsequently removed
from association with the ice body maker.
The present invention further comprehends providing such a control
element with means for permitting selective adjustment so as to
maintain different preselected levels of ice bodies in the
collecting space, as desired by the user. The adjusting means is
manually operable to permit facilitated adjustment and readjustment
as desired. One highly desirable advantage of this feature is the
adaptability of the control for use with different-size collecting
bins. Such adjustability is also advantageous where the ice body
maker is installed by the user in the field.
The improved control is extremely simple and economical of
construction, while yet providing the desirable features discussed
above.
More specifically, the invention comprehends an improved means for
controlling the transfer of ice bodies in an ice body maker having
a mold in which ice bodies are formed, means defining a collecting
space subjacent the mold, and means for transferring the formed ice
bodies along a preselected path from the mold to the collecting
space. The transfer-controlling means is defined by an elongate
control element having a holding portion, a sweep portion, and a
connecting portion connecting the sweep portion to the holding
portion. Operating means is provided for selectively disposing the
holding portion in a first position blocking said preselected path
for interrupting the transfer of the ice bodies, thereby
maintaining the ice bodies spaced from the collecting space for a
predetermined time period, and concurrently moving the sweep
portion through the collecting space to sense the level of ice
bodies already present in the collecting space. After the
predetermined time, the operating means moves the holding portion
from the first position to permit completion of the transfer of the
ice bodies to the collecting space and disposes the sweep portion
out of the path followed by the ice bodies during their transfer to
the collecting bin.
Further, more specifically, the invention comprehends the provision
of a deformable connecting portion permitting adjustment of the
disposition of the sweep portion relative to the holding portion.
The invention also comprehends provision of a retaining member for
holding the sweep portion in the adjusted position relative to the
holding portion whereby the sweep portion may be adjusted to sense
any one of a plurality of different levels of collected ice bodies
in the collecting space.
BRIEF DESCRIPTION OF THE DRAWINGS
Other features and advantages of the invention will be apparent
from the following description taken in connection with the
accompanying drawings wherein:
FIG. 1 is a fragmentary perspective view of a refrigeration
apparatus having an ice body maker embodying the invention,
portions being broken away to facilitate illustration of the
invention;
FIG. 2 is a perspective view of the ice body maker;
FIG. 3 is a traverse vertical section of the apparatus of FIG.
2;
FIG. 4 is a perspective view of an ice body as formed in the ice
body maker illustrated in FIG. 2;
FIG. 5 is a traverse vertical section similar to FIG. 3 showing the
ice body maker as at the initiation of an ejection cycle;
FIG. 6 is a diagrammatic section similar to that of FIG. 5 at a
subsequent portion of the ejection cycle;
FIG. 7 is a diagrammatic section similar to that of FIG. 5 at a
further subsequent portion of the ejection cycle with the ice
bodies partially removed from the mold cavity;
FIG. 8 is a diagrammatic section similar to that of FIG. 5 at a
further subsequent portion with the ice bodies transferred from the
ejector to a resting shelf portion;
FIG. 9 is a diagrammatic section similar to that of FIG. 5 with the
ice bodies being released from the resting shelf to fall into the
collecting space;
FIG. 10 is an elevation of the connector element shown in FIG. 3
for holding the control in any one of a plurality of preselected
adjusted positions; and
FIG. 11 is an enlarged side elevation of the ice body maker
illustrating a modified form of the invention;
FIG. 12 is a fragmentary perspective view of the mold of the ice
body maker;
FIG. 13 is an enlarged side elevation of the ice body maker with
portions broken away to facilitate illustration of the
invention;
FIG. 14 is a side elevation similar to that of FIG. 13 but showing
the modified form of control means of FIG. 11;
FIG. 15 is a diagrammatic vertical section of the apparatus of FIG.
14 as at the initiation of an ejection cycle;
FIG. 16 is a diagrammatic section similar to that of FIG. 15 at a
subsequent portion of the ejection cycle;
FIG. 17 is a diagrammatic section similar to that of FIG. 15 at a
further subsequent portion of the ejection cycle with the ice body
partially removed from the mold cavity;
FIG. 18 is a diagrammatic section similar to that of FIG. 15 at a
further subsequent portion with the ice body transferred from the
ejector to a resting shelf portion; and
FIG. 19 is a diagrammatic section similar to that of FIG. 15 with
the ice bodies being released from the resting shelf to fall into
the collecting space.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In the exemplary embodiment of the invention as disclosed in the
drawing, an ice body maker generally designated 10 is shown to be
installed in a refrigeration apparatus 11 of conventional
construction. Apparatus 11 may include a cabinet 12 defining a
refrigerator space 13 and a freezer space 14. Controlled access to
spaces 13 and 14 may be had by suitable doors 15 and 16
respectively. Refrigeration may be effected by suitable means,
herein illustratively comprising a compressor 17, a condenser 18, a
capillary 19 and conduits 20 and 21 for delivering refrigerant to
and from an evaporator 22 provided within the cabinet 12. Freezer
space 14 is maintained at a below freezing temperature whereby
water delivered to the ice body maker 10 through a conventional
water solenoid 23 may be frozen into ice bodies which are
automatically harvested.
The icemaker 10 as shown in FIG. 2 includes a mold 29 in which the
ice bodies 30 (FIG. 4) are formed and from which the ice bodies are
ejected to a subjacent bin 25 defining a collecting space 26 (FIG.
1) by means of an ejector 31 which sweeps through the mold during
the ejection cycle. The ejection member swings the ice bodies out
of mold 29 and against a stripper member 32 which effectively
positively strips the ice bodies from the ejector 31 and causes
them to fall downwardly into the collecting bin 25. Cyclical
operation of ejector 31 is automatically effected by a control
generally indicated 27 disposed at the forward end of the mold 29.
In addition to cycling the ejector 31, control 27 further
automatically provides for refilling of the mold for subsequent
further ice body formation therein, in the event that the level of
ice bodies in the subjacent bin 25 is below a preselected full
level. For a detailed description of the operation of control 27,
reference may be had to the hereinbefore identified Linstromberg
U.S. Pat. No. 3,280,578. Mold 29 defines a plurality of upwardly
opening cavities 33 in which ice bodies are formed. The water from
which the ice bodies are formed is delivered to mold 29 by means of
an inlet 34 connected to solenoid-operated valve 23 (FIG. 1)
through a suitable delivery tube. Valve 23 is connected to a
suitable source of water under pressure (not shown).
Referring to FIGS. 2, 3, and 12; mold 29 herein more specifically
comprises a tray structure having a bottom wall 35 and sidewalls 36
and 37. A calrod heating element 44 is pressed into bottom wall 35
to heat the mold during the ejection operation, thus aiding in said
ejection operation. A plurality of partition walls 38 extend
transversally across the mold to define with the above-indicated
tray walls the cavities 33 in which ice bodies are formed. Herein
each cavity 33 is partially divided by a partial dividing wall 39,
which extends transversally across the cavity as best seen in FIG.
12. Each of the partition walls and dividing walls is provided with
a recessed upper edge portion through which water flows from the
end cavity successively forward to the respective cavities until
all cavities are filled to a level L as shown in FIG. 3. Thus, the
recessed edge portion of respective partition and dividing walls
over which the water flows effectively form a plurality of weirs
over which a small body or bridge of connecting ice forms during
the freezing operation. As shown in FIG. 12, however, the recess 40
in the upper edge of the partial dividing wall 39 is substantially
larger than the recess 41 in the partition wall 38. Thus, the
connecting portion of ice which forms in the space defined by
recess 40 is substantially larger than the connecting length of ice
which forms in the recess defined by opening 41. Thus, a connecting
ice portion 42 is formed on ice body 30 the protective shown in
FIG. 4. Connecting portion 42 is preferably sufficiently strong to
prevent breaking of the ice body during the normal ejection and
transfer thereof from mold cavity 33 to collecting bin 25.
Illustratively, the connecting portions 43 formed in the opening 41
of the mold shown in FIG. 12 may break as a result of the impact of
the ice bodies resulting from their free fall into collecting bin
25 the connecting portions 42 being sufficiently strong to preclude
breakage as from such impact forces. Thus, the mold as shown in
FIG. 12 produces bifurcated ice bodies as shown in FIG. 4.
In order to sense the level of ice bodies 30 as they accumulate in
bin 25, this invention comprehends the provision of a novel sensing
arm structure 28 actuated by control 27 for controlling the
automatic harvesting operation so as to maintain a preselected
level of ice bodies in collecting space 26 as desired by the user.
The control 27 operates the sensing arm 28 through a connecting
portion 45, as best seen in FIGS. 3 and 11. The sensing arm 28
includes a holding portion 46, a sweep portion 47, and a connecting
portion 48 which, as seen in FIG. 11, effectively define a
generally U-shaped structure wherein the holding portion 46, and
sweep portion 47 define the legs of the U-shaped structure and the
connecting portion 48 defines the bight of the U-shaped
structure.
As shown, holding portion 46 may be substantially rectilinear and
extend adjacent the stripper 32 of the mold 29 onto which the ice
bodies 30 are delivered during an intermediate stage of the
ejection cycle. The sweep portion 47 is arcuate and the connection
portion 48 is also arcuate. The arcuate configuration of connection
portion 48 and sweep portion 47 effects an improvement over
prior-art sensing arm structure as follows: Should the user of the
icemaker remove bin 25 from the freezer compartment by sliding it
in the direction indicated by arrow 56, edge 57 of bin 25 contacts
an arcuate portion of sensing arm 28. This allows the arm to easily
ride up over edge 57 and thus not catch thereon or rake ice bodies
from bin 25.
The sensing arm may be formed of a suitable strong material such as
a metal rod or wire, and in the illustrated embodiment is formed of
stainless steel having a spring temper. Further, illustratively,
the sweep portion 47 may have a relatively large arcuate radius
varying from approximately 33/4 inches adjacent the connecting
portion 35 to approximately 43/4 inches adjacent the distal end 49
thereof. The connecting portion 48 may have an arcuate radius of
approximately 11/4 inches and may include an upturned arcuate
potion 50 extending from the distal end 51 of the holding portion
46. As seen in FIG. 11, the sweep portion 47 extends downwardly
into the collecting space 26 while the distal end 49 is juxtaposed
to the holding portion 46 adjacent the connection 45.
As shown in FIG. 11, the distal portion 49 may be adjustably spaced
from the holding portion 46 by means of a connector strap 52 which
connects end 49 to holding portion 46. As shown in FIG. 10, the
connector strap 52 may comprise a plastic element having a pair of
apertures 53 and 54 at the opposite ends thereof. Aperture 53 is
preferably slightly larger than the cross section of the sensing
arm 28 to permit facilitated movement of the strap 52 onto the
holding portion 46 from the distal end 49 thereof. The distal end
49 is inserted into the smaller aperture 54 whereby the spacing of
end 49 from the holding portion 46 may be retained by the canted
locking engagement of the strap 52 with the respective rod portions
46 and 49. A protective cap 55 may be installed on the end of the
rod 28.
The operation of sensing arm 28 with the ice body maker 10 may best
be understood by reference to FIGS. 5--9 of the drawings. Thus, as
shown in FIG. 5, the ice-harvesting operation is initiated by
counterclockwise rotation of the ejector 31 as seen herein, with
the sensing arm 28 disposed in a lowermost level-sensing position
within the bin space 26. As ejector 31 continues to rotate, the
sensing arm 28 is swung outwardly from the collecting bin 25, as
shown in FIG. 6. Continued rotation of ejector 31 causes it to
forcibly engage the upper surface 56 of the ice bodies and urge the
ice bodies outwardly from the mold cavities 33 in a pivotal
movement, as shown in FIG. 7. At the same time, control 27 causes
the sensing arm 28 to swing back downwardly into the collecting
space 26. At the position of FIG. 7 wherein the ejector fingers
have moved approximately 270.degree. from the start position, the
control 27 brings the sensing arm substantially fully to the
lowermost sensing position.
As shown in FIG. 8, the continued rotation of ejector 31 now brings
the ice bodies 30 outwardly from the mold cavities 33 whereupon the
ice bodies are stripped from ejector 31 by plastic stripper 32.
Movement of ice bodies 30 into the subjacent collecting space 26 is
blocked by the holding portion 46, and ice bodies 30 remain on top
of stripper 32, as shown in FIGS. 8 and 11. Thus, the ice bodies
are held on stripper 32 for a shot period of time while any melt
formed thereon as a result of heating of the mold in the ejection
cycle tends to refreeze whereby the ice bodies are dried before
completion of their transfer from the mold to the collecting bin
25. Further, the holding portion 46 prevents the ice bodies from
falling into the collecting space 26 prior to the movement
outwardly of the sensing arm 28, as shown in FIG. 9, during the
final portion of the harvesting operation. This effectively
precludes the ice bodies 30 from piling up on sweep portion 47
during the ejection operation. Should such "piling up" be
permitted, ice bodies 30 might be accidentally raked from bin 25
upon its removal from freezer compartment 14.
As shown in FIG. 9, the ejector 31 continues to rotate back to the
starting position of FIG. 5 while the sensing arm 28 is again
brought down into the collecting space 26 subsequent to the
delivery of the ice bodies 30 thereinto to sense the new level of
ice bodies in space 26. In the event that the level reaches the
preselected level, the movement of the sweep portion 47 of the
sensing arm 28 is arrested, thereby preventing further cycling of
the ice body maker 10 until such time as the level is lowered as by
the removal of ice bodies from the collecting bin whereupon the arm
may move to the lowermost position to initiate a subsequent ice
body making and harvesting operation.
To adjust the ice body maker to provide any one of a plurality of
different levels of ice bodies in the collecting bin 25, the user
may merely bend the connecting portion 48 to raise or lower the
sweep portion 47 as desired (assuming that adjusting strap 52 is
not used). Thus, as illustrated in FIG. 11, the connecting portion
48 may be bent to enlarge the radius thereof and lower the sweep
portion 47 to the dotted line position providing a lower level of
ice bodies in the collecting bin 25.
Alternatively, the adjusting strap 52 may be employed, as shown in
FIG. 11, to retain the sweep portion 47 in any one of a plurality
of different positions to obtain the desired adjustment of the
level. The strap 52 may be suitably adjusted by movement of the
distal end 49 of sweep portion 47 further into or outwardly of the
aperture 54 with the adjusted positioning of the sweep portion 47
being retained by the frictional engagement of the strap with the
sensing arm portions 46 and 47 in the respective apertures. Thus,
not only does the strap 52 provide a means for adjustably
connecting the distal end 49 of the arm 28 to the holding portion
46 to vary the disposition of the lowermost portion of the sweep
portion 47, but it also stabilizes the sensing arm structure by
effectively causing the sweep portion 47 to be connected to the
upper portion of the sensing arm at each of the opposite ends
thereof.
Where the adjustment of the disposition of sweep portion 47 is
effected simply by suitably bending the connecting portion 48, the
material of which sensing arm 28 is formed is preferably
controlably deformable to permit the adjusted disposition to be
maintained against the forces acting on the sensing arm in the
normal sensing operations while yet the bending of the connecting
portion 48 may be manually effected for facilitated adjustment by a
user, such as a housewife. Where the connector strap 52 is
utilized, the sensing arm material may be somewhat less rigid.
Thus, ice body maker 10 provides an improved control of the
transfer of the ice bodies from the mold to the collecting space in
the automatic harvesting operation. The control includes means for
interrupting the transfer of the ice bodies sufficiently to assure
a drying thereof before delivery to the collecting space and
provides improved means for permitting variation in the preselected
level of ice bodies in the collecting space, as desired by the
user. The improved sensing arm further assures that the ice bodies
will not pile up thereon during the ejection operation resulting in
their accidental expulsion from the collecting bin should it be
removed from the freezing compartment. The sensing arm structure is
simple and economical of construction, while yet providing the
above-discussed desirable features.
While we have shown and described certain embodiments of our
invention, it is to be understood that it is capable of many
modifications. Changes, therefore, in the construction and
arrangement may be made without departing from the spirit and scope
of the invention as defined in the appended claims.
* * * * *