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Патент USA US2135436

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Nov. l, 1938.
>
2,135,436
¢_ F, BALL
APPARATUS FOR MIXING CONCRETE AND THE LIKE
Filed Sept. 9, 1936
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APPARATUS FOR MIXING CONCRETE ÁND THE LIKE
Filed Sept. 9, 1936
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Nov. 1, 1938.
2,135,436
c. F. BALL
-APPARATUS FOR MIXING CONCRETE AND THE LIKE
Filed Sept. 9, 1936
íísheets-Sheet 3 '
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QN.
2,135,436 »
Patented Nov. 1, 1938
`UNITED STATES
_
PATENT OFFICE
2,135,436
APPARATUS Foa MIXING CONCRETE .um`
'
rm: Lum
Charles F. Ball, Wauwatosa, Wis., assignor to
Chain Belt Company, Milwaukee, Wis., a cor
poration -of Wisconsin
Application September 9, 1936, Serial No. 100,008
8 Claims. (Cl. 259-175)
A'I'his invention relates to apparatus for mixing
concrete and the like, and has for one of its ob
jects to provide an improved construction of mul
tiple compartment mixing receptacle for such
5
apparatus.
.
‘
`A further object of the invention is to` provide
_ an improved closure mechanism >for controlling
the drum openings of concrete mixing apparatus.
A further object of the invention is to provide
o improved mechanism for actuating said closure.
. A still further object of the invention is to
provide power actuated mechanism for operat
ing the closure', which includes yieldable means
l arranged to prevent damage to the parts in the
' event of a piece of large, aggregate or other un
yielding material being caught between the clo
sure and its seat in its closing movements.
A still further object of the invention is to pro
Fig. 6 is a central vertical sectional view. Dm
ly in elevation,~of said connection, taken-ap
proximately on the plane indicated by the line
6-6 in Fig. 5;
`
Fig. 7 is a longitudinal sectional elevational 5
view of one form of yielding means for prevent
ing damage to the parts as above set forth; and
Fig. 8 is a fragmentary sectional view of 4a
slightly modified form of connection between
the closure and its supporting shaft.
' Referring more particularly to Fig. 1, the mul
tiple compartment drum or receptacle comprises
va tubular shell Iii> preferably although not neces
sarily circular in cross section, the open ends of
which areclosed by the heads II and I2, riveted, 1.5
welded, or otherwise rigidly secured therein. 'I‘he
head II is provided with the charging Opening
I3 which may have associated therewith the>
charging chute I4 for. conducting the raw ma
ternas into the drum, and the head Iz is pro- 20
vide an improved connection between the closure
carrying shaft and the actuating arm therefor,> vided with the-discharge opening I5 which Vmay
said connection serving to translate rocking have associated with it any suitable and well
movements of the arm into axial movements of known form of discharge chute or mechanism
the shaft while permitting free rotation of the not shown, since it in itself constitutes no part
shaft upon its axis.
`
of the present invention. This discharge chute 25
With the above and other objects in view may be either manually operable or automatical
25
which will appear more fully below, the invention ly operable, by suitable power mechanism, as is
consists in the novel details of construction, and
known in the art.
,
combinations of parts, more fully hereinafter well
Intermediate the heads I I and I2 is the trans
described and particularly pointed out in the ap
verse partition I 6 having a central transfer open- -30
30 pended claims.
‘
ing I1 preferably surrounded by an angle mem
Referring more particularly to the accompany
ber I8 which strengthens _the -partition at this
ing drawings forming a part of this specifica . point and serves as a seat for the closure mem
tion in which like reference characters desig
ber I9 which controls the transfer of the par
nate like parts in all-the views:
tially mixed materials 'from the preliminary mix- 35
35 Figure 1 is a central longitudinal sectional ing compartment 20 into the ñnal mixing com
elevational view of one form of concrete mixing partment 2| into which the transverse partition
or agitating receptacle, closure, and operating divides the receptacle. 'I‘he closure member I9
mechanism therefor, constructed in accordance is carried by an axially- extending hollow shaft
with the present invention;
22 being joined thereto at the inner end of the 40
40 Fig. 2 is an enlarged longitudinal sectional latter by a connection 23 winch will be described
view, partly in elevation, of a portion of the
more in detail hereinafter.
closure carrying shaft, its support, and its con
The shaft 22 extends longitudinally through
nection with the closure, the extreme right hand the compartment 20 with an extension 'I9 there
portion of the view being taken approximately
45 on the planes indicated by the line 2-2 of Fig. 4;
Fig. 3 is a transverse sectional elevational view
of the shaft and its _splined support. taken ap
proximately on the plane indicated by the line
3-3 in Fig. 2;
50
.
Fig. 4 is a transverse sectional elevational
view, taken approximately on the plane indicated
by the line 4-4 in Fig. 2;
Fig. 5 is an end elevational view of the im
proved connection between the closure carrying
55 shaft and its actuating rock arm;
of projecting through the charging opening I3 45
and charging hopper Il, as will be readily under
stood from Fig. l, and having its exterior end
connected by a ball and socket joint 2l, to be »
more fully hereinafter described, with one end
of a rock arm or lever 25, the other end of which 50
is rigidly connected to a rock shaft 20 suitably
journalled in the framework of the apparatus,
not'shown. The said rock shaft 28 also rigidly
carries an arm or lever 21 the free e'nd of >which
is plvotally connected as at 2B to one end of a 56
~9,185,180
link 29, the other end of which is pivotally con
upon the squared end 5I of the stud 52 which is '
nected as at 39 to one arm 9| of a .bell crank
lever pivoted as at 92 upon the framework. The
received in and rigidly secured to the extreme
other arm '39 of said bell crank lever is pivotally
connected as by the pin 95 to one end of a link
or pitman 35 which preferably embodies a yield
ber SII is enclosed by a socket Il comprising two
able overload release mechanism to be more fully »
hereinafter described, and the other' end bf
which is pivotally connected as at V95 to the
rotating or oscillating arm I1 of the power dis
charge mechanism 35 which is or may be sub-`
- stantially of the rconstruction set forth and
claimed in the prior U. S. Patent Vto Samuel
15.
Shafer, Jr., granted May 9, 1922, No. 1,415,411.
end of the hollow shaft 22.
The said ball mem- _, t
‘ members 64 and 95 which are separable and have
the closure plate I9 clamped between them. The
ball member 55 is provided with a plurality of
radially extending lugs 55 which are receivable in
recesses 51 formed in the socket members 54 and
55 which recesses are of such dimensions relative
to those of the lugs that limited oscillatory'.
movements of the socket members and closure
I9 are permitted in the direction of the axis of
the shaft 22 but relative circumferential move
'I‘he drum or receptacle Il is further provided
with the circumferentially extending tracks 4l
receivable upon suitable supporting rollers, not
shown, ioumaled on the framework of the‘ma
chine and the said drum may also be provided
ment between the ball member and the socket
ting -element Il by means of which the drum
ially`to accommodate itself to the `seating ring „
may be rotated in the
II and thus provide a reasonably tight closure
and plate is prevented. It results from this con
struction that although rotary motion of -the
shaft is positively transmitted through the lugs
and recesses to the socket and closure member
with the sprocket or equivalent power transmit- l» I9, the latter at the same time may oscillate ax 20
ner.
and well known man
.
The preliminary mixing 'chamber 2l is pro
vided with a coniform shield and deflecting
member l5, as well as with a plurality of mixing
blades 45 only two of which are hereshown, and
with a plurality of transfer blades or troughs I5,
which extend along the inner surface of the coni
30 form defiecting member 44 which extends from
ás.
the outer shell I5 to the transfer opening I1, as
will be readily apparent from Fig. l. The coni
form member u not only tends to guide _the mix
ture to the transfer opening I1, but also serves
to brace and reinforce the transverse partition I5,
as well as to prevent concrete from collecting
in the corner joint between the said partition
and the outer shell I5, where it would otherwise
harden and build up to such an extent as to
between the said ring and plate, as will be read
ily understood.
f
.'
~
,
v
In order to prevent entry of constituents of
the *concreteV mixture into the connection 29
there is preferably provided a rubber- or other
yielding sleeve 59 one end of which is clamped as
by a ring 59 to the socket member 5l, while the
other end thereof is clamped as by a ring 1li to a 30
flange 1I rigidly secured to the stud 52, all as
will be clear from Fig. 2.
I
‘
. The ball and socket connection 2| between the
outer'end of the shaft 22 and rock` arm 25 is
shown in detail in Figs. 5 and 6, and comprises 35
a housing 15 formed with a partly` spherical sock
et 15 which receives the ball member 11.
The '
said ball member ‘|1- is axially bored for the re
c_eption of an anti-friction bearing 15 which
40 have to bel frequently chipped out by hand. 'I'he serves as a journal forfthe extreme‘outer end of 40
numbergof mixing blades 45 and Vthe transfer . the stud shaft 1l which is rigidly secured by weld
blades or troughs 59 may vary, one typical ex
ing or otherwise to the hollow shaft 22. One end
ample thereof being sixl mixing blades such as of thebore in the ball 11 is preferably closed by
I5, and three transfer troughs I5, which latter ‘ the threaded cap member Il, while the other end
45 preferably form continuations of an alternate of said bore is Provided >with a suitable seal Il
three of the mixing blades as shown in the upper which seal and cap prevent entry of the ¿con
portion of the preliminary mixing chamber. In crete constituentsinto the bearing. The housing
' like manner the final mixing chamber 2| is pro
vided with a plurality of mixing blades I1 and a
plurality of discharge buckets 49,' and the num
bers of these blades and buckets will likewise
vary, one typical example thereof being six mix
ing blades I1, and 12 discharge buckets- Il.
As will be clear from Fig. l, the outer end of
55 the hollow shaft 22 is supported by the ball and
>socket connection 2l and rock arm 25, and the
inner end of the said shaft is supported by a
slide bearing which, as here'shown, comprises a
plate 50, see also Figs. 2 and 3, substantially ver
tically disposed within the preliminary mixing
chamber 20 adjacent the transfer opening I1 and
welded or otherwise rigidly secured to the trans
fer blades or troughs I5. ‘The said plate 50 car
ries a plurality of fingers or projections 5|, the
65 inner ends 52 voi? which> are slidably receivable in
the longitudinal extending channel vmembers 5I,
which a're `welded or otherwise rigidly secured
upon the exterior surface of the hollow shaft 22.
The said shaft is thus splined to the support 50
70 being freely axially slidable therethrough but
positively rotatable therewith, as will be readily
understood.
-
As best shown in Figs.2 and 4, the connection
between the transfer closurek I9 and the hollow
75 shaft 22 comprises a ball member 59 mounted
15 is provided with a pin or stud 92 one end 93
of which projects into an elongated recess 84
formed in the ball member 11 and which serves to 50
prevent rotation of the ball relative to the hous
ing while at the same time permitting of oscil
lating movements thereof in the plane of the
shaft axis.
'
.
The stud 52, stud shaft 19 and cap member Il,
are preferably provided with the axial lubrication
passages 85, 86, and 91, respectively, whereby l
>suitable lubricant may be introduced to the parts.
While the yielding overload mechanism incor
porated into the pitman 35 may take various 60
forms, that shown in detail in Fig. 'Ihas beenfound
quite effective in actual use. Referring more par
ticularly to the said ligure, the mechanism may
comprise a stud 90 having an eye 9| for the recep
tion of the pin 34 and which stud is threaded as at 65
92 into one end of a tubular housing member 99,
vthe other end of which housing isthreadedasat 94
into the complementary end ofthe tubular hous
ing member 95. -A rod or shaft 99 having an eye
91 for the reception of the pin 95 slidably enters 70
the housing member 95 through a bearing 99
and extends therethrough as well as into the
housing member 93, being provided at its other
end with a head 99 which serves as a seat -for
One end of a coiled compression spring I 95, the 75
'
3
9,185,486
other end of which is seated against a sleeve or
bushing |0| which has a ball or anti-friction
. bearing |02 interposed between it and the shoul
der |03 of- the housing member 0l.' ` It will thus
be apparent that if `during the closing move
ments of the closure I9 a stone or other un
ñnal agitating compartments, said partition wall
extending substantially perpendicular to the
perimetral walls of' said shell, and having a
transfer opening affording communication lbe
yielding piece of material should be caught be
tween the closure and the seating ring I8, there
by resisting further closure of the member I9, no
10 damage to the parts will result since the motion
being transmitted to the shaft 22 and closure I9
through the rock arm 25, arm 21, link 29, bell
crank lever 3| and 33 and pitman 35 from the
power actuating arm 31 of the power discharge
15 device 30 will merely compress the spring |00
while permitting those elements beyond the rod
90 to stop their movement.
\
As is readily understood by those skilled in the
art, in the use of these multiple compartment
drums or receptacles, the raw materials which
go to make up a batch of concrete are introduced
into the preliminary mixing chamber such asv
20 through the charging chute I4 and are there
mixed for a portion only of the predetermined
25 mixing period, after which they are transferred~
into the final mixing chamber 2| and the mixing
of that batch completed, while a fresh batch is
being introduced into and preliminarily mixed in
the chamber v2li. Of course, during the prelimi
30 nary mixing in chamber 20 of the initial batch
the closure I9 is moved to the left, as viewed in
Figure l, toseat against the ring I0, while, when
the predetermined portion of the mixing cycle
tween said compartments; a coniform member
in said preliminary agitating compartment, se
cured to the perimetral walls of said shell and to
said partition adjacent said transfer opening, andarranged to brace said partition wall as well as
to deflect material toward said opening and pre 10
vent its collecting in the joint between said par
tition and shell; mixing blades in said compart
ments; transfer blades in said preliminary agi
tating compartment disposed substantially par
allel to said coniform deflecting member and ex 15
tending tosaid transfer opening; and means for
controlling the passage of material through said
transfer opening. '
»-
`
2. In apparatus for mixing or agitating con
crete and the like,ja receptacle comprising a tu
bular shell having end walls provided respectively
with a charging and a discharging opening; a
partition wall intermediate said end walls di
viding‘the receptacle into'preliminary and iinal
agitating compartments, and having a transfer
opening aiîording communication between said
compartments; a bracing member secured to said
partition and shell, arranged to also prevent
building up of material deposits in thecorner
joint between theV partition and shell; material-`
transfer blades in said preliminary agitating
compartment arranged to direct material to and
through said transfer opening; a supportcar
ried by said blades; a longitudinally movable
shaft mounted in said support; and a closure
member carried by said shaft in cooperative re
lation to said transfer opening, arranged to
control the passage of material therethrough.
3. In apparatus for mixing or agitating con
crete and the like, a receptacle comprising a tu
bular rotatable shell having end walls provided
respectively witha charging and a discharging
opening; a partition wall intermediate said end
walls dividing the receptacle .into separate agi
tating compartments, and having a central
transfer opening affording communication be
tween said compartments; a coniform member
secured around the perimeter of the transfer
cycle~ is repeated.
In the somewhat modified form of connection opening in said partition wall and extending
therefrom to said shell„ arranged to brace said
between the closure and shaft illustrated in Fig
ure 8, the end of the shaft is provided with a. partition wall and deflect material in onevof
4 stud |05 having an enlarged head |00, which said compartments toward said opening; trans
is positioned between the opposite rubber or -fer blades in one of said compartments arranged
other yielding blocks ,or members |01 and |08. to direct material to and through said transfer
opening; a support secured to said blades and 55
55 The said blocks and head are enclosed by a rotatable therewith; a shaft- extending axiallyl
housing |09,_secured as by bolts ||0 to the cen
tral part of the closure I0, and as will be readily through said charging and transfer openings,
and splined in said support for axial movement
understood, the construction provides for uni
versal movement of the closure’relative to the `relative thereto and rotary movement therewith;
a closure member mounted on said shaft for
shaft, as in the preferred construction.
While one form of the invention has been il.-y limited oscillatory movements, arranged to con
lustrated and described it isobvious that those trol the passage of material through said trans
has been conípleted, the power mechanism 38
35 will automatically move the closure tothe posi
tion shown in Fig. 1, so that the partially mixed
batch may be transferred through the transfer
opening |'l i'nto the ñnal mixing chamber 2|
whereupon the mechanism 38 will again close
40 the transfer opening and the preliminary mixing
of the second batch as well as' the final mixing
of the ñrst batch will be simultaneously com
pleted with the closure I9 closed. At the com
pletion of-the mixing in chamber 2| the usual
discharge chute is manipulated either manually
or automatically to discharge the completely
mixed batch from the receptacle whereupon the
skilled in the art may vary the details of con
fer. opening ;, and power actuated connections ex
struction as well as the precise arrangement of
terior of the receptacle arranged to automatical
parts without departing from the spirit of the
ly move said shaft in its support to open and 65
invention and therefore it is not wished to be '
close said closure.
limited to the above disclosure except as may be
4. In apparatus for mixing or agitating con
crete andthe like, a rotatable receptacle com
prising a tubular shell having transverse walls
defining a mixing compartment, said walls hav 70
ing alined openings for ingress and egress of
the material; a ‘support adjacent said egress
opening, rotatable with said shell; an axially
required by the claims.
`
What is claimed isz
l. In apparatus for mixing or agitating con
70
crete and the like, a receptacle comprising a
tubular shell having end walls provided respec
tively with a charging anda discharging open
ing; a partition wall intermediate said end walls
75 dividing the receptacle intd preliminary and
'
>
-
movable shaft extending through- said openings
and splined adjacent one end in said support; a 75
4
9, 185,486
solegsupport for the outer end of said shaft: a
connection between said outer end of the shaft
and said rock arm, arranged to translate swing
6. In closure mechanism for an opening of a
concrete mixing receptacle, a shaft mounted for
axial movements vrelative to the receptacle and
rotary movement therewith; a closure carried by
said shaft for movement thereby vto and from
said opening; and a ball and socket joint'be
tween said closure and shaft providing for lim
ited axial oscillation of the closure relative to' `the
ing movements of said arm into axial movements
shaft, there being lugs formed on one member
closure member carried by saidshaft for move
ment to and from said egress opening to control
the passage of material therethrough; a rock arm
mounted exteriorly of the receptacle adjacent
said ingress opening. arranged’to constitute the
10 of said shaft while providing for rotation of _the
shaft about its axis; and means for moving said>
rockarm.
A
Y
4
5. In apparatus for mixing or agitating con
crete vand the like, a rotatable receptacle com- .
prising a tubular shell having transverse walls
defining a mixing compartment, said walls hav
A ing alined openings for ingress and egress of
the material; a support adjacent said egress
opening. rotatable with said shell; a shaft ex- f
tending through said openings, and splined ad
jacent one end in said support; a closure mem
»ber carried by said shaft for movement to and
of said joint. receivable in recesses formed'in the 10
other member thereof, for preventing circum
ferential movement of thev closure relative to
thev shaft._
.
.
‘
'
'
’
7. In closure' mechanism for an opening of a
concrete mixing receptacle„a shaft mounted -i'or
axial movements and provided with a head; a
closure member having a housing enclosing said
head; and resilient members interposed between
said head and said closure and housing arrangedto provide for axial oscillation of the closure rel
ative to the shaft.
8. In closure mechanism for an opening of a
from said egress opening to control the passage
of material therethrough; a rockr arm mounted concrete mixing receptacle, a shaft mounted for
exteriorly of the receptacle adjacent said ingress , axial movements; a closure carried thereby for
opening; a connection between the other end of movements to and from said opening; a rock
-said shaft and said rock arm, supporting said last arm for imparting movements to said shaft; and
named shaft end on said arm and arranged tn
translate swinging movements of said arm into
axial movements of said shaft while providing
for rotation of the shaft Vupon its axis; power
Y means for moving said rock arm; and yieldable
means inthe closure operating system for pre
a connection between said rock arm and shaft
including a socket member, a ball member mount
ed therein' for’ oscillatory movements, and a
bearing within said bail member Journalling said f
shaft for rotation about its axis'relative to said
ball and socket members.
-
venting damage to the parts should a piece of
unyielding material be caughtï in the closing
movements of saidV closure.
i
'
CHARLES F. BALL.
35
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