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Патент USA US3065621

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‘Nov. 27, 1962
A. F. CONTO
3,065,611
FREEZER
"
Filed Feb. 16. 1961‘
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INVENTOR
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Patented Nov. 27, 1962
2
3,065,611
FREEZER
Armando F. Conto, Chicago, 111., assignor to Freez-King
Corporation, Chicago, Ill, a corporation of Illinois
Filed Feb. 16, 1961, Ser. No. 89,834
7 Claims. (Cl. 62—298)
ear-s 17, 18, which receive knurl~headed screws 19, 20
by which the door 14 may be secured to a shell-support
member 22 or other suitable part of the housing 1. A
gasket 23 is interposed between the door 14 and ?ange 4.
At its lower end the door 14 is formed with a longitudinal
bore 24 which communicates with a rotatable shutoff valve
26 having a valve ori?ce 27 and discharge tube 28 through
which frozen material may be discharged from the freez
more particularly, to freezers of the type used to make
ing chamber 3. A handle 29‘ is provided for opening and
ice cream, frozen custard, and similar frozen desserts.
10 closing the valve 26.
It is an object of the present invention to provide a
Rotatably mounted within the freezing chamber 3 is
freezer having a rotatable beater in a freezing chamber,
a beater 31 having scraper blades 32, 33 suitably secured
and wherein the beater may be readily removed from the
thereto. One end of the beater 31 has a hub 34 which
freezing chamber to permit cleaning, sterilization and/ or
is journaled on an axially extending spindle 36 integrally
repair thereof as well as the interior of the freezing cham 15 formed on the inside of the door 14.
ber, and at the same time reduce the possibility of con
The other end of the beater 31 also has a hub 37 pro
taminants entering the freezing chamber ‘when the beater
vided with an axial bore 38 which is square in cross sec
is removed therefrom.
tion and receives the cross-sectionally square end 39‘ of
It is a further and more speci?c object of the present
a drive shaft 41. The drive shaft 41 projects horizontally
invention to provide a freezer of the type stated in which 20 outwardly of the freezing chamber 3 through a large
the beater is driven by a drive shaft projecting into the
opening 42 in the wall 13, below the feed tube 12. The
freezing chamber through a wall thereof, the drive shaft
drive shaft 41 extends coaxially through a housing 43
being supported by bearings adjacent to and exteriorly
secured by bolts 44 (one being shown) to the outside of
of the said freezing chamber. A bellows-type seal is
the wall 13. A gasket 46’ is interposed between the hous
provided to reduce the possibility of seepage of the re 25 ing 43 and wall 13. Adjacent to the wall 13, the housing
frigerated mix outwardly onto bearings or of bearing
43 has a downwardly opening drain tube 45. Mounted
lubricant and foreign matter into the freezing chamber.
on the drive shaft 41 is a bearing sleeve 46 which termi
The seal is independent of the beater and is, therefore,
nates at its inner end in axially spaced relation to the
maintained when the beater is removed from the freezing
wall 13. The ‘bearing sleeve 46 has a transverse slot 47
chamber, permitting more thorough cleaning and steriliza 30 radially therethrough and in axial alignment with an an
tion of the freezing chamber.
nular slot 43 on the drive shaft 41. A key 49 ?ts into the
It is also an important object of the present invention
slots 47, 48 to key the bearing sleeve 46 and drive shaft
to provide a freezer of the type stated in which the bean
41 against relative axial movement. The outer end of
ings are mounted in a housing adjacent to the freezing
the ‘drive shaft 41 is cut down to form opposed ?ats 51,
chamber wall through which the drive shaft projects. A 35 52, which ?t against correspondingly spaced ?ats 53-, 54
lubricant seal is interposed between the bearings and wall
on the outer end of the bearing sleeve 46. The bearing
in spaced relation to the wall, leaving a space or buffer
sleeve 46 has at its outer end an axial keyway 56 for
zone within the housing between the wall and lubricant
receiving a key 57 by which the hub 58 of a pulley 5?
seal. The housing has a drain opening in communication
may be secured to the bearing sleeve 46. A set screw
with said zone so that any seepage of lubricant past the 40 61 may be threaded into the hub 58 for engagement with
lubricant seal or of mix past the sealing means therefor
the key 57.
will pass into the buffer zone and drain therefrom.
Surrounding the outside of the housing 43 is a U-bolt
In the drawing:
62, which may be held by nuts 63 (one being shown) to a
FlG. 1 is a longitudinal fragmentary sectional view of
bracket 64. The bracket 64 is joined to a suitable sup
a freezer constructed in accordance with and embodying 45 porting frame (not shown) for the housing 1.
the present invention;
Mounted on the bearing sleeve 46 are spaced ball bear
FIG. 2 is a fragmentary front elevational view of the
ings 63, 64, the bearing 63 ?tting against a shoulder 66
freezer as seen from line 2—2 of FIG. 1; and
on the ‘bearing sleeve 46. The bore of the housing 43 is
FIGS. 3, 4 and 5 are fragmentary sectional views taken
annularly grooved for receiving snap rings 67, 68, and
along lines 3—3, 4-4 and 5-5, respectively, of FIG. 1. 50 the bearing sleeve 46 is similarly grooved for receiving
Like reference characters indicate like parts throughout
the snap rings 79, 71, 72, thereby to retain the bearings
the drawing.
63, 64 against axial displacement. Adjacent to the snap
Referring now in more detail to the drawing, which
ring 67, the diametrically enlarged end of the bearing
illustrates a preferred embodiment of the present inven
sleeve 46 has a grease seal 73 mounted thereon. It will
tion, A designates a freezer comprising a housing 1 hav 55 be seen that the bearings 63, 64 and grease seal 73 are
ing a horizontally extending tubular shell 2 therein which
contained in a part 43a housing 43, which is remote from
forms an enclosing wall of a freezing chamber 3. The
the wall 13. The part 43b of the housing between the
front end of the shell 2 is turned radially outwardly to
seal 73 and wall 13 forms a buffer zone or space 69 be
form a ?ange 4, which projects through an opening 6
tween the wall 13 and bearing-grease seal assembly, the
in the housing front wall 7, and at its radially outermost 60 buffer zone 69 being in communication with the drain
part 8 the ?ange 4 is secured to the inside of the front
tube 45.
wall 7. Surrounding the shell 2 are refrigeration coils
Within the freezing chamber 3 the drive shaft 41 has
9 for freezing ice cream or similar frozen dessert mix
a diametrically enlarged collar 74 having a shoulder 75
within the chamber 3. Mounted over the rear end of
for receiving a plastic thrust washer 76, which is prefer
the shell 2 is a casting 11 having an upwardly opening 65 ably formed of a ?uorocarbon resin of the type sold under
feed tube 12. through which mix may be admitted at the
the trademark “Te?on.” Mounted on the drive shaft 41
rear upper end of the shell 2 to the freezing chamber 3.
adjacent
to the thrust washer 76 is an annular, bellows
The casting '11 also includes a plate 13 which constitute
type sealing member 77 which surrounds the opening 42.
a rear wall for the freezing chamber 3.
»
Disposed over the front end of the shell 2 is a door 70 The sealing member 77 may be fabricated of ?exible,
white polychloroprene rubber of the type ordinarily used
14 which provides a closure for the opening 16 at the
in dairy equipment. The sealing member includes an
front of the shell 2. The door 14 has laterally projecting
This invention relates to improvements in freezers and,
3,065,611
3
a
axial ?ange 78, against;- the washer 76‘, substantially radial
in the housing, the sleeve and drive shaft being rotatable
together and being keyed against relative axial movement,
portions 79, 81 joined by a bellows section 80, and an
axial ?ange 82 against the Wall 13. Sufficient thrust on
the sealing member 77 is applied through the washer 76
to provide a good seal across the opening 4-2.
When the pulley 59‘ rotates during operating of the
freezer, the drive shaft 41 will rotate the beater 31 to
agitate the mix within the freezing chamber 3. The mix
may rise to a level above the opening 42. However, the
sealing member "77 remains ?xed and prevents mix from 10
entering the buffer zone 69. Furthermore, the sealing
member 77 prevents lubricant or other foreign matter
from Within the buffer zone 69 from entering the freez
ing chamber 3 through the opening 42. However, if there
should be seepage of mix past the sealing member 77 15
bearing means in the housing and mounted on the sleeve,
shoulder-forming means on ‘the part of the drive shaft
within the chamber and presented axially toward said
opening, a sealing member surrounding the ?rst-men
tioned opening and including spaced radial portions joined
by a bellows section, said sealing member being on said
drive shaft and supported at one end by the shoulder-form
ing means for axial thrust-wise engagement against the
inside of said chamber wall to form a seal over said ?rst
mentioned opening independently of the beater.
3. In a freezer having means forming a freezing cham
ber, a beater rotatable in the freezing chamber about a
substantially horizontal axis, a drive shaft for the beater
into the buffer zone 69' or seepage of lubricant past the
exteriorly of the chamber and projecting into the chamber
grease seal 73 into the buffer zone 69, the seepage will
through a wall of the chamber-forming means, means
drain outwardly through the drain tube 45.
forming a coaxial separable connection between the drive
When it is desired to remove the beater 31 from the
shaft and the beater, a housing exteriorly of the chamber
freezing chamber 3, the screws 19, 29 are removed, where 20 and adjacent to said wall and into which the drive shaft
upon the door 14 may then be removed from the front
extends, a sleeve over the drive shaft and being within
end of the frezer housing 1. The beater 31 is then axially
the housing, the sleeve ‘and drive shaft being rotatable
withdrawn from the freezing chamber 3 through the open
together and being keyed against relative axial move
ing 16 without removal of the drive shaft 41. This is
ment, bearing means in the housing and mounted on the
possible because of the separable telescoping connection 25 sleeve for journaling the sleeve and drive shaft, means
between the shaft end 39 and hub 37. The axial position
?xing the axial position of the bearing means relative to
of the drive shaft 41 remains such as to maintain the seal
the housing, a shoulder on the part of the drive shaft
ing member 77 sealing-wise over the opening 42 due to
within the chamber and presented axially toward said
the fact that the shaft a1 is keyed to the bearing sleeve
opening, a bearing-forming washer mounted on the shaft
46, which is, in turn, prevented from axial movement.
Consequently, the seal across the opening 42 is main
tained independently of whether or not the beater 31 is
in or out of the freezing chamber 3. This is important
because bearing lubricant and other foreign matter are
thus prevented from entering the ‘freezing chamber when
the beater 31 is removed from the freezing chamber 3,
with the result that thorough cleaning and sterilization is
permitted of the parts within the chamber 3.
In compliance with the‘ requirements of the patent
statutes, I have herein shown and described a preferred
embodiment of the invention. It is, however, to be un
derstood that the invention is not limited to the precise
construction herein shown, the same being merely illus
trative of the principles of the invention. What is con
sidered new and desired to be secured by Letter Patent is:
‘1. In a freezer having means forming a freezing cham
ber, a heater rotatable in the freezing chamber, a drive
shaft outwardly of the chamber-forming means and pro
jecting through an opening in a wall thereof axially of
the heater for driving the beater, means forming an
axially separable connection between the drive shaft and
one end of the beater, the chamber-forming means hav
ing another opening adjacent to the other end of the
heater and through which the beater is axially remov
able, a closure for said last-mentioned opening, and means
independent of the heater for sealing the ?rst-mentioned
opening, said last-named means including a sealing mem
ber mounted on the part of the shaft within the chamber
and surrounding the ?rst-mentioned opening, and means
on the shaft for applying axial thrust on the sealing mem
ber in the direction toward said wall for urging the seal
ing member axially against the Wall
2. In a freezer having means forming a freezing cham
ber, a beater rotatable in the freezing chamber, a drive
against the shoulder, and a resilient sealing member
mounted on the shaft against the washer, said sealing
member being urged by the washer, thrust-Wise over the
opening to form a seal thereacross independently of the
v
beater.
4. In a freezer having means forming a freezing cham-_
her, said means including a chamber wall, a housing adja
cent to the exterior of said wall and extending’away
therefrom, a heater rotatable in said freezing chamber,
a drive shaft in said housing and projecting into the
chamber through an opening in said wall for driving the
beater, said opening being below the level at which mix
may be present in the freezing chamber, bearing means
in the housing for journaling the drive shaft, ?rst sealing
means in said housing for sealing the bearing means,
said ?rst sealing means being adjacent to the bearing
means and being between the bearing means and the
wall and spaced from the wall, the part of the housing
between the wall and ?rst sealing means having a drain
opening, and second sealing means within the chamber
for sealing said opening in the wall, the drain opening
being in substantially unobstructed communication with
the opening in the wall and the ?rst sealing means where
by seepage of material past either of said sealing means
will pass out of the housing through said drain opening.
5. In a freezer having means forming a freezing cham
ber, a beater rotatable in the freezing chamber about a
substantially horizontal axis, a drive shaft for the beater
exteriorly of the chamber and projecting through an
opening in a wall of the chamber~forming means and
terminating within the chamber, means forming a co
axial separable connection between the drive shaft and
the beater, a housing exteriorly of the ‘chamber and
cent to said wall and surrounding the opening, said
shaft being within said housing, a sleeve over the
shaft and being within the housing, the sleeve and
adja
drive
drive
drive
shaft in axially separable telescoping connection with one
end of the'beater and projecting from within the chamber
shaft being rotatable together and being keyed against
outwardlly through an opening in a wall of the chamber
relative axial movement, bearing means in the housing
forming means, said chamber-forming means having an
and mounted on the sleeve in axially spaced relation to
other opening adjacent to the other end of the heater
the wall, means for ?xing the axial position of the hear
and through which the beater is axially removable, a 70 ing means relative to the housing, ?rst sealing means
closure for said opening, said ?rst-mentioned opening
mounted on the sleeve adjacent to the bearing means
being below the level at which mix may be present in the
and axially spaced from said wall, said housing having
freezing chamber, a housing adjacent to said wall ex
a drain opening intermediate to the ?rst sealing means
teriorly, of the chamber, said drive shaft extending into
and Wall, and second sealing means within the chamber
the housing, a sleeve over the drive shaft and being with 75 and independent of the beater for sealing said opening
1
3,065,611
6
in said chamber wall, said second sealing means being
in unobstructed communication with the opening in the
wall and the ?rst sealing means whereby seepage of ma
terial past either of said sealing means will pass out of
her, a beater rotatable in the freezing chamber, a drive
shaft outwardly of the chamber-forming means and pro
jecting through an opening in a wall thereof axially of
the beater for driving the beater, means forming an
the housing through said drain opening.
axially separable connection between the drive shaft and
6. In a freezer having means forming a freezing cham
ber, a beater rotatable in the freezing chamber about a
substantially horizontal axis, a drive shaft for the beater
ing another opening adjacent to the other end of the
beater and through which the beater is axially removable
one end of the beater, the chamber-forming means hav
exteriorly of the chamber and projecting through an
from the chamber, a closure vfor said last-mentioned
opening in a wall of the chamber-forming means and 10 opening, and means for sealing the ?rst-mentioned open
ing when the heater is in operative position in the cham
terminating within the chamber, means forming a coaxial
separable connection between the drive shaft and the
ber and when the heater is removed from the chamber,
said last-named means including a sealing member
beater, a housing exteriorly of the chamber and adjacent
mounted on the part of the shaft within the chamber and
to said wall and surrounding the opening, said drive shaft
being within said housing, a sleeve over the drive shaft 15 surrounding the ?rst~mentioned opening, and means on
the shaft and independent of the beater for applying axial
and being within the housing, the sleeve and drive shaft
thrust on the sealing member in the direction toward said
being rotatable together and being keyed against relative
wall for urging the sealing member into axially directed
axial movement, bearing means in the housing and
pressure against the wall to seal said opening, thereby to
mounted on the sleeve in axially spaced relation to the
wall, means for ?xing the axial position of the bearing 20 inhibit leakage of contaminants through the opening and
into the chamber when the heater is removed from the
means relative to the housing, ?rst sealing means mounted
on the sleeve adjacent to the lbearing means and axially
chamber.
spaced from said wall, said housing having a drain open
References Cited in the ?le of this patent
ing intermediate to the ?rst sealing means and wall, and
UNITED STATES PATENTS
second sealing means within the chamber and mounted 25
on the shaft and being urged by means on the shaft inde
2,559,032
Ta-cchella _____________ __ July 3, 1951
pendently of the beater into sealing engagement across
2,560,664
Sammy ______________ __ July 17, 1951
said opening in said chamber wall, the drain opening
being in substantially unobstructed communication with
the opening in the wall and the ?rst sealing means where 30
by seepage of material past either of said sealing means
will pass out of the housing through said drain opening.
7. In a freezer having means ‘forming a freezing cham
2,604,307
2,913,169
2,916,106
2,961,853
2,962,879
2,971,800
Swenson _____________ __ July 22,
Wilsmann ___________ __ Nov. 17,
Duckett ______________ __ Dec. 8,
Cohrt _______________ __ Nov. 29,
Patty ________________ __ Dec. 6,
Ruthner _____________ __ Feb. 14,
1952
1959
1959
1960
1960
1961
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