USRE14795E - Concxete-mixisb - Google Patents

Description

M. AND J. P. GILSON.

CONCRETE MIXER.

APPLICATION FILED AUGIBI 1919.

ReiSsued Jan: 27, 1920.

STATES PATENT- HICHAEL GILSON AND JOHN P. GIBSON, OF FBEDONIA, WISCONSIN.

coucnn'rn-mxma.

a. tion'of nelssued L tters Pat nt- Reissued an. 2'7, 1920.

' Io. 137.0110, wee August 14, 1917, Serial 80.146582, filed February a, 1917. enu... to:

Y reissue filed-August 13, 1919. Serial No. 317,880.

To all whom itmay concern:

Be it known that we, Mrcmnr. Grnson and JOHN P. Gnson, both citizens of the United States," -and residents of Fredonia, .in the .w mit of Oza'ukee and State of Wisconsin,

havemvented certain new and useful Imrovements in Concrete-Mixers; and we do hereby declarethat the following is a full, clear, and exact description thereof.

Our invention pertains to new and useful irprovements in machines, particuy those which are adapted for mixing" 4 1 .the drum and on the line 22 of been more or less diflibatchesof concrete.

Heretofore it has cult in mixersof this type to efliciently ex pelthe contents. from the mixing dr-um after th n St ted b n e1 u re em the same has been-thoroughly commin led. -It is therefore the primary object o ,the resent invention to provide an arrangement mixed contents from the m1xing drum, this being accomplished by rotating said drum when in a dumping sition in a direction reverse to the direct1on of rotation when "able mixing drum 1n connection with a drive shaft continuously rotatable in one direction and means for tilting the drum.to either whereby said drum will rotate in one direction when in the first mentioned sition and in a reverse direction when in t e other position.

It is also an object of our invention to simplify and strengthen, the structure and improve the efiiciency of mixers of this general type, and to distribute the load strain of the'mixing drum both when in o rative' I mixing or loading osition and in umping position so as to re ieve the bearing connection between the supporting yoke and said -With the' foregoing .nd other objects we 65 advantages in view, the invention resides wherein:

Figure 1 represents a vertical sectional or quickly and thoroughly discharging theer ob]ect-is to provide a simply. .wit

constructed mixing-machine having a tiltloading or dumping position and engaging the same with drive means on saidshaft,

more particularly in the novel combination, formation and arrangement of parts which will be hereinafter described and'claimed, and shown in the'accompanying drawing view taken through a concrete mixer constructed .in accordance with our invention, said section being substantially on the plane of the line 1-1 of Fig. 2.

Fi (2 is a horizontal sectional view substantially through the supporting? frame of ig. 1, and 1 Fig.3 is a detail view showing the adjustable means for holding the drum in meshing ment with itsv rivi gear.

ment of the invention which depicts one conventional form thereof, it will be seen that the machine consists essentially of a supporting frame, a mixing drum, and means or revolving ,said, drum in loading and dumping positions,

The supporting frame comprises skeleton,

and standards 1 having their feetconnected by -'a pair of spaced skid beams 2 andtheir intermediate portions by a channel beam 3,

the same being located between the feet as clearly-shown in Fig. 1. Then per .ends of the standards 1 terminaterin 4 which'journally receive trunnions' 5 formedon the ends of the arms'of a. U-shape supparting yoke 6. The trunnions are preferliin the form of sleeves formedintegrally the yoke arms. I

. The mixing drum 7 is mounted for axial rotation betweenthe arms'of said yoke 6. and preferably. consists of a pan-shaped bottom casting Sand an annular mouth cast ing 9, having 1ts outer portion taperingly 'rednced to facllitate dischar these castings 'being connected ,b a. cyllndrical wall 10. Thecenter of the'bo ttom' casting 8is provided with an outwardly projecting cylindrical boss 11 which seats in a socket formed I in the bight of'the I oke 6 and has a stub shaft 12 extendingt erefrom, the same being joumally mounted in a bearing opening of a bearing sleeve 13 formed integrally with said bight of the yoke 6 (see Fig. 1). Bearing balls 14 are interposed between the boss 11 and the adjacent portion of the yoke V to form an end, thrust bearing.

. an result of this construction the mixing drum 7 is axially rotatable and vertil ly tiltable The means for causing the 2o Y mg and loading tilting consists of an operat' .handle 15 secured by means of a bolt or t e like 16 to one of the trunnions as indicated in F1g.. 2.

The means for axially rotating the drum includes a drive shaft .17.journa1ed in bear- 18 can'ie'd' by a transverse beam 19 that the standards 1.

gt ese gears being 1s secured to forwardly extending supportmg arms 20 preferably cast integrally with at an inclination purpose which will later be explained. .On

the outer end, that is to say thehigher end, of the shaft 17 is a art that their teeth will be engagedby t eteeth of--an annular gear ring 23 secured.

to the intermediate I position.v L

. in one direction rtio'n of the drum 7 ted to -either itsmixwhen the latter is, p sit on o fiqi s l mP Continuous rotationiofthe drive shaft 1 7 shaft 24journaled in tha 2 other shaft 17, the outer end of saidshaft vided' with 'a* 31to the bottom casting'8 and cylindrical latter that they will ,cause the concrete or.

. other materials deposited in the drum to be sition."

24 having a drive means .such as the band The opposite end of the shaft 24 Theinterior of the mixing-drum 7 is pro one of which'is'rigidly secured as at 30 and wall IO-resipectivel the others being spaced about the interior of the drum and. secured in the same'manner; These mixing blades are soarranged with-respectto the drum and the axisof rotation of the thorou hly comml nglfid .When the same is rotate while in its mixin and loading'pothe other'hand when. the mun drum 1s m a dumping position, and rotating contents.

in a direction-the reverse of the direction of rotation when .inits other position, the blades 29 will Inother words-.these mixing blades29 are inclined at an an'gle-to the tat' "holding the teeth of when the drum is rotated drum, means is" provided for' positively I the gear'nn 23 in proper mshmg. M t with j I teeth the 3e on'said shoulder prevents This shaft is posltioned to the horizontal for a tially as follows: The swung 'by means of the end thereof w l the teeth of the gear,,ring 23'meshed with 1s procured by v means of a bearings 25- carried by but at right angles to the plurality of; mixing blades 29' wall of the point of engagement the "sition'g These difl'erences indirection of roto expel thecommingled verse direction of rotation the I .29will havea tendency to expel-the drum direction of rotation of the drum'so that in a loading or mixing position the contents will be direct-. ed toward the bottom thereoflwhereas when dum'pni'g position-and r0- I when in both of its 'two' positions. 1 That is t say when the drum .is in loa etc the horizontal the mix' as to expelz'the' contents b'y as the mixingand loading posi tion-is the normal position'of the mixing of the gear 21. vThis means-consists of a I pawl 32 pivoted toone of'the standards 1' and having-an adjustable head 33 for engagement with a stop shoulder 34 formed on the operating or tilting handle 15 adjacent pivot thereof as seen from Fig. 3. A lug inward slipping movement of the pawl. 'I he adjustable hBRd 0f the pawlprovidesan ar-' rangement whereby an exact meshing of the :gear teeth may beinsured, and the pivotal arrangement of said pawl allows the same o, be readily shifted the'drurnto its dumping position. v I

The operation of the lnvention is substan- .-mixingdrum 7 is handle 15 to its leadposition wherein the open be located upwardly and ingand mixi n the, teeth lof the gear 21. Now, assuming that the various ingredients to be mixe have been deposited in the drum, .revolution of the shaft 24 will impart rotation to the drive shaft '17 and in turn axially rotate said drum in such a direction that the mixing blades therein will aid the tumbling action given the materials in thoroughly P I agitating and commingling the same.

' --After' the.drum-contents have been effec- .tively mixed, the operating handle '15 is swung in a proper direction to tilt the drum" through an arc of substantially 180 de rees', the gear teeth ofthering 23 thereby oing disengaged -from the teeth of the gear '21 and caused to mesh'with the teeth of-the gear 22 at the opposite end of the shaft 17 rom said gear 21. It will be noted that the engagement between the gearring 23 and gear 22 is diametrically op osite' the between said and the gear21. Thus even though theshaft 17 isrotated in the same direction as pre- I viously mentioned, which is'the in practice, the drum 7 will be-rotated .while 'in a dum ing ition in a direction reverse 0t,

'rectlon of rotation in the normalvp tation will be observed in each case from the mouth end-of the drum.- Ow' to this remixing blades contents, thereby aiding the natural action oflgravity'. I I

f positioning he drive shaft 17 at an drum be caused to assume a proper inc ation dmg and mixmgPOsitionits mouth will be s'uficiently raised to retainthe contents therein, whereas when the same is in dumping 'tion, its

open end will permit ready exp ion of the contents. Furthermore the gears 21 and 22 are of such a diameter to permit movement of I I thattheaxis ofroiao I loading position to mix the contents and in v the reverse direction when in dumping posi-. tion to aid in expelling the mixed contents,

and means operable at will for moving the drum from loading to'dumping position and 'vice versa and simultaneously disengaging the same from said rotating means.

' 2. A mixer comprising a rotary, vertically tiltable drum, one end of'said drum being open, a support for said drum, means for rotating the drum in one direction when its open end is disposed upwardly, means for rotating the drum' in a reverse direction when said openend is disposed downwardly i'ncludin acontinuously rotatable shaft disposed su stantially parallel to the axis-of the drum, a pair of ear wheels on the shaft,

perlpheral gearteet on the drum adapted to be selectively meshed with the gear teeth, and means for rotating said shaft.

3. A mixer comprising a horizontally rotatable drum support, a mixing drum having one end rotatably secured to the su "periphera gear teeth on the mixin port, an inclined shaft journaled under t e drum, a air of .gear wheels on the shaft,

l drum, adapted to selectively mesh with t e gear wheels, and means for'rotating" said shaft.

4. .Amixercomprising a support, a mixselectively v ing drum rotatably secured therein, a shaft journaled under the drum substantially par- 'allel to the axis thereof, and means carried by each end of the shaft for rotating the drum in one direction when in normal position and in reverse direction'when in damping position. a

5. A mixer comprising, in combination, a pair of sup) orting standards, a mixing drum rotata y and vertically mounted between said standards, eripheral gear teeth on the drum, 9. forwar 1 extending bracket carried by said brackets, transversely extendin and alined arms formed on said 'beam, earings in said arms, .a shaft jour- .naledin said bearings and extending substantially parallel to the axis of the drum, gear v wheels mounted on the shaft and adapted to be selectively engaged by the peripheral 'teethof the drum for revolving formed on each standar a transverse beam v said drum in one direction when in norma position and in a reverse direction when in discharging position, a beveled gear fixed to said shaft and juxtaposed to the forward gear wheel thereon, laterally extending and transversely alined arms formed on said beam to oneside of saidother arms, a driven shaft journaled therein, anda beveled gear on the inner end of the last namedshaft and in mesh with the 'beveledgear'of the first shaft substantially as described.

In testimony that we claim the fore ing we have hereunto set our hands at Fre onia,

inthe county of Ozaukee and Statej'of Wis consin.

'MIGHAEL GILSON. JOHN P.. GILSON.-

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