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Патент USA US2403914

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My w» 2%
Filed April 7, 1942
2 Sheets-Sheet 1
mew/er IMJHAUG
. Jul}? 11%» @416.
Filed April 7, 1942
2 Sheets-Sheet 2
Patented July 16,}946
‘ ’
Edwin G. Eppenbach, Manhasset, and Henry
Imshaug, Flushing, N. Y.; said Imshaug assign
or to said Eppenbach
‘ lClaim.
Application April 7, 1942, Serial No. 437,979 ‘
‘a '
(01. 241-285)
This invention relates to grinding devices or
mills in general, and particularly to what may
within the base“ interior.
be termed a vertical milll
from the motor is a vertical shaft i2. ' Abutting
the insertion or the removal ‘of motor H located
While thedevice is
primarily intended to operate vertically, it may
be placed and operated in any other desired‘posi
tion. The device is adapted for ?nely grinding
or milling either dry or ?uid matter, but is pref
erably used for material suspended in fluids.‘ v It
is especially adapted for handling dietary or
medical substances, such as serum, andfor bring 10
ing these substances to any desired colloidal state.
Its prime object is to provide a compact, rela
tively simple and accurately operating and ?nely
Extending’ upwards
and associated with upper ?ange ill" of the base
is a substantially dish-shaped element [3 form
ing the support for an upwardly converging open
frame work or structure I4. Dished element or
support [3 overhangs the ‘body of the‘base. At
the center of the support is an opening l5, motor
I I being suspended from the peripheral ?ange of
that opening into hollow base Iii. Spaced from
support 13 and covering motor II and opening I5
and overhanging the latter is an upwardly dished,
adjustable device of this type, which may be
concentrically disposed centrally/apertured drip
readily disassembled and re-assembled for steri- 15 guard l6, designed to effectively prevent liquid
lization purposes, and wherein means are pro»
or moisture from entering the base and damaging
vided for not only milling substances and disthemotor. It will be observed that motor shaft
charging them in their milled state from the dei2 Passes‘ Centrally through Opening i5 and
vice, but whereby a sustained and continuous
through drip guard l6.>
milling operation, for any desired period,’may be 20 secured to and Supported by the reduced HD1391‘
provided until the required ?neness of the milled
end of Open frame Structure I4 is a combination
matter is reached
journaling and adjusting member ll, consisting
The foregoing and still further important ob-
of a hub member IS with which is associated a
jects and advantages of the present invention
threaded adjustable cup l9, accommodating shaft
will become more fully apparent from the ensuing 25 bearing 20. Cup l9 may be set in its adjusted
description in connection with the accompanying
DOSitiDn in respect to hub 13 by set screws 2!.
drawings, wherein;
Within hub I8 is lodged and guided a sleeve 22,
Fig. 1 illustrates an elevation of the device in
which is threaded externally at 23 and is engaged
its presently preferred form, shown partially in
by an internally threaded and calibrated index
30 ring 24, by means of which ring sleeve 22 may be
Fig. 2 illustrates an enlarged partial detail vie
adjusted in upward or downward directions.
of the grinding or milling mechanism;
Sleeve 22 may be held in its adjusted position by"
Fig. 3 is a similar illustration of a modi?ed
means of set screw 25 engaging ring 24
form of the grinding or milling arrangement;
‘Within sleeve 22 and journaled in bearings 20
Fig. 4 is a bottom View of a portion of the stator 35 is rotor shaft 26. The latter is joined with shaft
in one of its forms used with the grinder shown
l2 of motor H by means of coupling 21, accessibly
in Fig. 2;
located within frame [4. Secured to shaft 26 is
Fig. 5 is a top view of a rotor such as employed
rotor 23, forming a part of the grinder 01' mill
in the construction shown in Fig. 2; and
unit of the device. Rotor 28 is exchangeable.
Fig. 6 illustrates a top View of a rotor such as 40 The stator of the mill is indicated at 29 and also
employed in the construction shown in Fig. 3.
comprises an exchangeable member or insert,
In Fig. 1 of the drawings there is illustrated
which is supported by the broadened upper or
a vertical mill structure in accordance with the
?anged end 30 of sleeve 22, and which broadened
present invention. It broadly consists of four
end forms the bottom of the mill casing, which
major parts, that is, a base portion, an open mill- 45 houses the grinder unit. It will be seen that the‘
supporting portion, the mill and the hopper.
The base portion comprises a hollow, relatively
' casing is provided with a water jacket 35, where
by the casing, and therefore the grinder unit, may
spacious base Hi provided with an outwardly ex
be readily cooled or held at any desired tempera
tending bottom or floor ?ange l0’ and an in
ture required for the matter to be treated within
wardly directed upper or supporting ?ange I 0" 50
at the top of the base. The base, although pref
Above jacket 3| is a jacketed top member 32,
erably placed upon the floor, may be mounted
held together with flange 3!] of sleeve 22 by means
and secured‘ at any desired position by means of
of spacer bolts 33. Supported by upper jacket
bolts, not shown, passing through ?ange [0’.
structure 32 is a hopper 34, provided with‘ a cover
The upper end of the base is open to permit 55 35, which may be completely closed if so desired.
ner as to provide precise cooperation between one
another. In both constructions the rotor is not
bodily adjustable, whereas the stator may be
moved for adjustment in respect to the rotor
By means of the jacket in member 32 the con
tents of the hopper may be kept at any desired
temperature. The top of the hopper is provided
with an inlet 36 into which‘ is removably placed
the end of the goose neck 31 forming the upper
through the arrangement of sleeve 22 and index
ring 24, which latter may be fixed in any position
portion of conduit 38, joined at its lower end with
to hold the stator in its adjusted place. In this
outlet pipe 39. The latter is connected at 49 with
manner a very minute adjustment is possible be
the grinder unit, and its discharge is controlled
tween the grinding or work surfaces of the rotor
by valve 4|. This valve may be so placed that
it either provides a direct discharge from the 10 and stator, and any wear of these surfaces may
be readily compensated by simply moving the in
grinder unit through its hollow structure 42, or
dexed adjusting ring 24 to the desired setting.
that it closes outlet pipe 39 to provide circulation
Although the illustration in Fig. 1 indicates a
of the matter being milled through pipe 38 to
device primarily intended for use in vertical posi
the top of hopper 34 and back into the grinder. tion, and although the device is called a vertical
Referring now to Figs. 2, 4 and 5, these detail
mill, the grinding mechanism, as well as the mo
?gures clearly show the construction of the
tive source, will operate in any other desired posi
grinder or mill unit. Rotor shaft 26 is off-set and
tion, provided the hopper issuitably located to
threaded at 43 for the reception of rotor 28, which
> function in conjunction with the grinder in such
is shown in plan view in Fig. 5. This form of a
rotor has a conical work surface 44, in which are 20 other position.
While speci?c details are illustrated in the
drawings, itis readily‘ evident that in the em
minating with‘ their broadened ends at the nor
ployment of the device for various matter to be
mally horizontal top surface 46 of the rotor.
milled, ,modi?cations and improvements may
From this top surface extend vertical vanes or
have to be incorporated, and we therefore reserve
blades 41, which are positioned tangentially to a
for ourselves the right to make changes and im
theoretical inner circle. Recesses 45 and the
provements in our invention, without departing
peripheral faces of vanes 41 are provided with
from the scope thereof, as expressed in the an
sharp cutting edges.
nexed claim.
Stator 29, which forms an annular insert within
provided wedge-shaped, inclined recesses 45, ter
W e claim:
the water jacketed portion 3| of the grinder hous
ing, is provided with an internally conical work
surface 48, corresponding to and adapted to co
operate with conical work surface 44 of the rotor.
In a colloidal mill, a hollow base haVing an
upper ?ange arranged to provide a central open
ing at the top of, the base, an open frame struc
ture mounted upon the upper base ?ange and
Within work surface 48 are provided recesses 49,
and adjacent to these recesses are ?utes 50 eX
comprising a dished frame-supporting element
overhanging the base and an upwardly tapering
open framework connected to the dished element,
said dished element having a central opening, a
indicated at 5| in Fig. 4, which cooperate with
motor with an upwardly extending vertical shaft
the working or peripheral edges of rotor vanes
41. These vanes are adapted to function. both as 40 suspended from the dished element and concen
trically aligned in the hollow base with the cen
turbine blades as Well as precutting instrumen
tral opening, an upwardly dished centrally aper
talities in conjunction with ?utes 58, which latter
tured stationary drip guard concentrically aligned
also serves as feeders for the material to be milled,
with the shaft and spaced above and overhang
in that they guide it towards the adjacent milling
surfaces of the rotor and the stator.
45 ing the central opening, and attachment means
between the drip guard and the frame support
In the modi?ed form of the grinder or milling
ing element for preventing liquid or moisture
unit shown in Figs. 3 and 6, the rotor consists
from entering the base and damaging the motor,
of a lower, bodily immovable member 52, provided
the shaft of the motor extending through and
with a recess formation 53 and an adjustable top
member 54 provided with a ?ange 55. Extend 50 above the drip guard, a, mill unit surmounted by
a feed hopper supported upon the top of the frame
ing vertically from the ?at upper surface of mem
structure and. including a vertically adjustable
ber 54 are tangential vanes 56. Between lower
disk centrally coupled to a vertically downward
members 52 and ?ange 55 of the upper member is
ly extending shaft, the lower end of the mill shaft
securely held an abrasive element 51, provided
with an outer conical work surface, which forms 55 being shouldered to form a shaft portion of re
duced diameter, a ball bearing unit mounted
a continuation of the outer tapered face of ?ange
about the reduced shaft portion with the inner
55 and the tapered peripheral surfaces of vanes
race contacting the shaft shoulder, a bearing cup
vertically adjustably mounted within and to the
The stator in this construction comprises an
annulus 58, provided with a recess 59, and a head 60 top of the open frame structure and supporting
the outer race of the ball bearing unit, a coupling
6!’! provided with an internally conical Work face,
disposed directly above the drip guard and di
which latter is provided with inclined ?utes 6|.
rectly below the bearing cup, and opcratively
Within recess 59 is lodged an exchangeable abra
connecting the upwardly extending motor shaft
sive element 62, preferably provided with recesses
63, which form continuations of ?utes iii.
65 and the downwardly extending mill shaft, the
bearing cup and coupling being readily accessible
In either of the constructions shown in Figs. 2,
due to their location with respect to the open
4 and 5 and Figs. 3 and 6, the Work surfaces,’
frame work.
whether conical or cylindrical or both, of the
tending vertically through the upper portion of
the stator. These ?utes have sharp cutting edges,
grinder stator and rotor conform with one an
other in their respective contours in such a man
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