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Патент USA US2379647

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July 3, 1945.
R. w. MUERLE
v
2,379,647
CENTRIFUGAL SEPARATOR PAN
Filed Dec. 8, 1941
3 Sheets-Sheet 1
fwenior':
July 3, 1945-
R. w. MUERLE
2,379,547
CENTRIFUGAL SEPARATOR PAN
Filed Dec. 8, 1941
5 Sheets-Sheet 2
July 3, 1945.
R w, MUERLE
2,379,647
CENTRIFUGAL SEPARATOR PAN
. Filed Dec. 8, 1941
MIL/f COVE/9
zum" lllllllllllhllhin
3 Sheets-Sheet 3
Patented July 3, 1945
2,379,647
UNITED STATES PATENT OFFICE
2,379,647
CENTRIFUGAL SEPABATOR PAN
Richard W. Muerle, Spring?eld, IlL, assignor to
Montgomery Ward & 00., Incorporated, Chi
cago, 111., a corporation of Illinois
Application December 8, 1941, Serial No. 422,028
10 Claims. (Cl. 233-4)
of metal (from a chemical standpoint). Perhaps
This invention has to do primarily with an
improvement in what is generally termed cream
covers and skim milk covers for cream separators
and the like.
For a number of years, centrifugal cream sep
arators had been in use to separate butter fat
from whole milk. The separated butter fat, in
the form of cream, is discharged from a rapidly
one piece becomes su?iciently plated before an
other is even partially plated, and di?'iculties are
encountered in securing the uniformity of color~
ing in plating which is so necessary for articles
of this type subject to frequent inspection.
It is a further object of this invention to pro
vide a device which has a certain amount of
springiness so that the assembly of the cream
rotating separator bowl into a cream cover which
catches and conducts the cream from the sep 10 and milk covers into operating position will re
sult in a construction which does not rattle, which
arator to where it is discharged into buckets or
has a secure grip betweenmating parts.
other containers. The skim milk is discharged
from another portion of the rotating separator
bowl, into another generally similar structure
Other objects and advantages of the inven
tion will appear as the nature of the improve
known as a skim milk cover. In the past, it has 15 ments is better understood, the invention consist
ing substantially in the novel construction, com
been customary to make these covers of several
bination and arrangement of parts hereinafter
pieces, generally steel stampings, and weld or
fully described, illustrated in the accompanying
solder the parts together to form a complete unit.
drawings, and ?nally pointed out in the appended
Since
is a highly perishable product, and
the utmost importance is attached by State, city 20 claims.
In the drawings:
and dairy inspectors and the like to all surfaces
Figure 1 is a. fragmentary vertical sectional
and passages contacted by the milk products dur
view showing a. portion of an ordinary cream sep
ing the process of separation, it is highly desira
arator with the cream spout and the milk spout
ble that there be no ridges, roughly soldered
seams, poor joints between spout and frame, and 25 in operating position thereon. This ?gure is
partly cross-sectioned to show pertinent parts of
portions which resist regular efforts at cleaning.
Despite this fact, even the latest styles of tinware
the device;
(as these skim milk and cream covers are gen
erally designated) have rough joints, crevices and
portions that resist cleaning, and covered spouts.
It is an object of this invention to provide a struc
ture and method of making it, which will overcome these objections.
Figure 2 is a top plan view of a cream spout
incorporating my new construction;
Figure 3 is a longitudinal, cross-‘sectional, ele
30
vational view, showing the device of Figure 2;
Figure 4 is a vertical elevational view looking
directly into the spout portion of the device of
Figure 3;
It is the object of applicant's invention to elimi
nate soldering or other jointer of parts and sur 35 Figure 5 is a view similar to that of Figure 2.,
but showing the skim milk cover;
faces used in the conduction of the milk and
Figure 6 is a view similar to Figure 3 but illus
cream in the construction of this tinware.
trating the device of Figure 5; and
It is a further object of applicant's invention to
Figure 7 is a view similar to that of Figure 4,
provide a construction which may be manufac
tured with less operations and fewer tools and 40 but illustrating the device of Figure 5.
Referring more in detail to the construction
dies than other devices used for the same purpose.
shown in the various ?gures, and particularly to
It is still a further object of applicant's inven
‘Figure 1, Ill designates, in general, a cream sep
tion to provide cream covers and skim milk cov
arator of the centrifugal type. It is provided
ers which are stamped from a single piece of met
al. In this connection, frequently trouble in 46 among other things with the milk supply can II,
into which the milk to be separated is poured,
manufacturing is encountered where different
with the separator bowl l2, float l3, the portion
metals are used for different stampings due to
which will here be designated as the ?oat sup
the fact that these metals may not be of the
porting cover It, the cream cover I5, the milk
same chemical composition. In such condition
the tinning or plating which is necessary to pre 50 \cover It, the latter two of which form the prin
cipal subject matter of this invention, the sep
arator bowl housing II, the spindle l8 which is
be accomplished more easily on one piece of met
used for driving the separator bowl, and the driv
al than it may on another. Frequently, the pieces
ing gear l9.
.'
of metal constituting one assembly, such as a
cream cover will be made of different qualities 65 Referring in particular to the construction
vent corrosion and make the unit sanitary, ‘may
2
2,379,647
shown in Figures 2, 3 and 4, which is the cream
cover designated in its entirety as I5, I have pro
vided a construction which is readily stamped
out of a single piece of metal using ordinary ma
chinery and dies with the exception of the mating
?ange 20. A single sheet of metal such as light
weight steel is placed in the dies and the spout
l l and frame I8 and bottom 19 are stamped there
It will be understood that after these units l5
and I6 are formed, they are generally dipped into
molten tin which protects the surfaces against
corrosion, and makes them more sanitary.
The mating?ange 20 is stamped out of a single
piece of metal in a single operation.
from in a series of operations known as “draws.”
When it is noted that the cream and milk covers
?oat supporting cover [4 ?ts over the cream cover
55. The cream cover is designated herein as Hi.
'I'hat’is, the forming is partially done in what is 10 must be assembled and disassembled at least twice
known as a ?rst draw and is continued in a second
a day in normal operation, and thoroughly cleaned
and additional draws until it is completely formed,
so as to pass‘ inspection and be sanitary, it will
trimmed and ?nished in its ?nal dimensions.
be readily seen that the simpli?ed and sanitary
The unit is thus made from a single piece of metal.
construction of applicant’s arrangement has ad
This forms the device as an open spout which 15
vantages.
is easily cleaned, and the frame It and bottom I9
The form of the invention herein shown and
described presents a preferred embodiment there
the various parts having generous radii which will
of, and delineates its adaption to p.'actical use,
not retard cleaning. Heretoi’ore, the greatest
but it is to be understood that the present dis
di?iculty has been experienced in connecting the 20 closure is to be considered from the illustrative
spout to the frame and bottom, and to my knowl
standpoint and not as imposing restriction or
limitation on the invention.
edge there is no construction on the market which
does so without welding or soldering, and with a
While I have herein shown and described
complete elimination of seams and angles. The
certain features of my invention, still I donot
open spout is cleaner than the closed spout ?rst, 25 wish to limit myself thereto, except as I may do
merge into the spout 11 without a seam and with
because it is not necessary to form a seam, and
secondly because a closed spout does not offer
so in the claims.
I claim:
1. In a centrifugal discharge receiving pan and
ready access for thorough cleaning. Further, the
elimination of sharp angles is seldom possible in a
cover, an annular receiving pan having a side wall
closed shout, and a closed spout must be joined to 30 with a spout gap therein and an annular integral
the rest of the structure by special operations.
centrally elevated bottom to provide in combina
tion with the side wall an annular open top re
As shown in my construction, I have provided
the reinforcing ?ange 21 which adds strength to
ceiving trough, and an open top spout integral
with said pan having a substantially ?attened
the construction and springiness and ?exibility
so that the stacking of the ?oat supporting cover 35 base portion at its inner and extending outwardly
on the cream cover in assembling the units for
from said bottom, and side walls, one of which is
operation is readily accomplished. With this ar
integral with and extends outwardly from the
rangement, the diameter of the mating ?ange of
?rst mentioned side wall of said pan and the other
of which extends outwardly from said side wall
the ?oat supporting cover which slips into the
inner periphery of the cream cover may be sub 40 on the other side of said gap in a smooth bend,
and a sti?ening ?ange extending continuously
stantially that of the cream cover, assuring a
around the upper edge of the pan side wall, and
tight ?t which will eliminate rattling and will
continuously along the upper edges of the spout
provide a good grip between the mating parts.
side walls.
The mating ?ange is spot Welded or otherwise
2. In a centrifugal discharge receiving pan and
attached to the bottom 19 of the cream cover. 45
cover an annular receiving pan having a side wall
The mating ?ange 2D is preferably spot welded to
with a spout gap therein and an annular integral
the bottom iii of the cream cover. This mating
centrally elevated bottom to provide in combina
?ange renders itself readily to what is known as
tion with the side wall an annular open top re
a coining operation which is performed after the
?ange has been spot welded to the main frame. 50 ceiving trough, and an open top spout integral
with said pan having a substantially ?attened
This coining operation is usually performed with
base portion at its inner end extending radially
a heavy press under considerable pressure and
and tangentially outward from said bottom, and
joins the ?ange to the main frame and rounds the
side walls, one of which is integral with an' ex
edges to such an extent that no seam is apparent
after the entire unit has been dipped into tin, and 55 tends substantially tangentially from the ?rst
mentioned side wall of said pan and the other of
appears to all practical purposes as one piece.
which extends substantially radially from said
In actual operation neither cold milk nor cream
side wall in a smooth bend, and a sti?ening ?ange
ever reaches this lower ?ange, but skim milk does
extending radially outwardly and extending con
spray against the same as it runs oil into the
skim milk frame. Skim milk is a by product and 60 tinuously around the upper edge of the pan side
wall, and continuously along the upper edges of
is used in most cases for feeding livestock. Even
the spout side walls.
1
so, there should be no seams anywhere on the
3. In a centrifugal discharge receiving pan and
.tinware where bacteria can breed and the jointure
cover an annular receiving pan having a side wall
between the ?ange 20 and the frame as formed
above is of such a satisfactory type that there is 65 with a spout gap therein and an annular integral
centrally elevated bottom to provide’ in combi
no seam left, in the ordinary sense of the word.
Referring to the construction shown in Figures
5, 6 and 7, the proportions are slightly different
than those of Figures 2, 3 and 4 but the construc
tion and parts are otherwise identical. Accord
ingly, no separate description is believed neces
sary and the observations with respect to Figures
2, 3 and 4 are equally applicable to Figures 5, 6
and 7 with the exception that the cream cover ?ts
‘ nation with the side wall an annular open top re
ceiving trough, and an open top spoutvintegral
with said pan having a substantially ?attened
70 base portion at its inner and extending radially
and tangentially outward from said bottom, and
side walls, one of which is integral with and ex
tends substantially tangentially from the ?rst
mentioned side wall of said pan and the other
over the milk cover in the same manner as the 75 of which extends substantially radially from said
2,879,647
side wall in a smooth bend, a sti?ening ?ange
extending continuously around the upper edge of
the pan side wall, and continuously along the
3
I of said spout, the upper edge of said outer wall
upper edges of the spout side walls and ‘an an
nular nesting ?ange secured to the under side
of said bottom for cooperating and mating with
being provided with a ?ared ?ange uniformly
spaced above the plane of the base of said trough,
said ?ange continuing without interruption
I along the upper edges of the side walls of said
spout channel, and an annular skirt depending
the side wall of a second annular receiving pan.
from the bottom of said trough, the diameter of
4. In a centrifugal discharge receiving pan and
which is slightly different from that of the cir
cover an annular receiving pan having a side
cular wall.
wall with a spout gap therein and an annular 10
8. In a vertical axis centrifugal separator hav
integral centrally elevated bottom to provide in
combination with the side wall an annular open
top receiving trough, and an open top spout inte
gral with said pan having a substantially ?at
tened base portion at its inner end extending 15
radially and tangentially outward from said bot
tom, and side walls, one of which is integral with
and extends substantially tangentially from the
?rst mentioned side wall of said pan and the
ing a separator’radially outward discharge level,
in combination, a receiving pan for said radially
outward discharge level, comprising a single one
piece pan having an annular open top trough and
open top channel spout extending outwardly
therefrom, the pan having an outer substantially
vertical discontinuous circular wall of substan
tially uniform height broken only by said spout,
said wall on- either side of said spout merging
other. of which extends substantially radially 20 without break, into the respective side walls of
from said side wall in a smooth bend, a stiffen
ing ?ange extending radially, outwardly and ex
tending continuously around the upper edge of
the pan side wall, and continuously along the up
said spout, and an associated means acting as a
cover forsaid pan, having an annular depending
circular skirt of a diameter slightly different
from‘ said circular wall whereblr to produce a
per edges of the spout side walls and an annular 25 tight grip between said skirt and wall when tele—
nesting ?ange secured to the under side of said
scopically embraced, ?ared means on one of said
bottom for cooperating and mating with the side
skirt or wall to facilitate telescoping one on the
wall of a second annular receiving pan.
other, and means for limiting the axial tele
5. An annular centrifugal separator pan and
scoping of said parts to a distance substantially .
open top channel spout formed from a single in 30 less than the height of said wall.
tegral sheet of metal, said pan portion compris-v
9i In a vertical axis centrifugal separator hav
ing an annular open top trough, the edge of the
ing two or more axially spaced separator radial
inner wall of which de?nes an aperture to re
ly outward discharge levels, in‘ combination a
ceive the centrifuge discharge device, ‘and the
receiving pan for each of said levels, the upper
outer wall of which is circular and discontinuous 35 and lower receiving pans each comprising a sin
at the spout, and merges continuously and with
gle one piece pan having an annular open top
out break with the side walls of the channel walls
trough and open top channel spout extending
of said spout, the upper edge of said outer wall
outwardly therefrom, the lower pan having an
being provided with a ?ared flange uniformly
outer substantially vertical discontinuous circu
spaced above the plane of the base of said-trough. 40 lar wall of a substantially uniform height broken
6. An annular centrifugal separator pan and
only by said spout, said wall on either side of said
open top channel spout formed from a single
spout merging without break into the side walls
integral sheet of metal, said pan portion com
of said spout and the upper pan having a short
prising an annular open top trough, the edge of
annular depending skirt of diameter slightly dif
the inner wall of which defines an aperture to 45 ferent than that of said circular wall, whereby in
receive the centrifuge discharge device, and the
sertion'of said skirt into-telescopic engagement
outer wall of which is circular and discontinuous
with said circular wall will spring said wall to
at the spout and merges continuously and with
vary its diameter and provide a tight engage
out break with the side walls of the channel
ment between the parts, ?ared means on oneof
walls of said spout, the upper edge of said outer 50 said wall and skirt for facilitating the telescopic
wall being provided with a ?ared ?ange uniform
engagement of said skirt and side wall and
ly spaced above the plane of the base of said
means for limiting the length of telescopic en
trough, said flange continuing without inter
gagement between said skirt and side wall.
ruption along the upper edges of the side walls
10. An annular centrifugal separator pan and
of said spout channel.
-» 55 open top channel spout formed from a single in
7. An annular centrifugal separator pan and\ tegral sheet of metal, said pan portion com
open top channel spout formed from a single in
prising an annular open top trough, the edge of
tegral sheet of metal, said pan portion compris
the inner wall of which de?nes an aperture to
ing an annular open top trough the edge of the
receive the centrifuge discharge‘ device, and the
inner wall of which de?nes an aperture to re-_ 60 outer wall of which is circular anddiscontinuous
ceive the centrifuge discharge device, and the
at the spout, and merges continuously and with
outer wall of which is circular and discontinuous
out break with the side walls of the channel
at the spout and merges continuously and with
; walls of said spout.
out break with the side walls of the channel walls
RICHARD W. MUERLE
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