Concrete-mixer.

•Application filed May.15. 1907. Serial No.· 373^788.'·

To all wltom7t,may concent: .· I ., Berit-knoivrikhatl, Pniuii’A. 'Koehring, j a citifcoh M'lhb United States, residing at MihyUftketq’codhtv of -Milwaukee, arid State of Wisconsin;’have invented new and useful IniprOV-emenls dii· Goncrete-Mixcfs; of which' the following is' a Specification; '

My irtv0nti<in i'dlates to that class of coh-, crcte niixdr.A ’in which cement, sand .and' other material of Which the concrete is 'comCosed, ate mixed together 'preparatory to eiiig iised within a revoluble drum and it pertains more especially among other things, to the means employed for discharging the concrete from the Outlet toward the inlet side of the drum and for discharging the same when properly mixed froih the drum while the same is being revolved'into a stationary receptacle. .

The construction of niy device is explained by reference to the accompanying drawings ift which, , ’Figure 1 is a side view part broken away to show the interior of the druni. Fig..2 is an end view part broken away, and Fig. 3 is a detail showing the relative arrangement of the mixing buckets. .

Like parts are identified by tin» same,reference figures throughout the several views.

represents the drum which is rcvolubly supported from the frame 2 of the vehicle through the rollers 3, 3, ami roller supporting shaft 4: Motion is communicated to the druni 1 from the sprocket chain 5 through the procket wheel 6, wheel supporting shaft 7, pinions 8 and two annular series of cog teeth 9, 9, which series of teeth 9,are secured to the periphery of the drum. The. shaft 7 is supported from .the frame 2 at its respective ends from the .bracked 10. *1 he.-mechanism thus far described is. substantially of ordinary construction.

My invention pertains more especially, as nreviouslv suggested, to the means employed for discharging the contents of the drum therefrom as the same is being revolved as hereinafter described. The buckets of the scries 12 comprise the bottom portion 13, the lower end 14 which curves upwardly and terminates flush with the upper edge 15, reference beiiv· had to the position of said buckets as shown‘in Figs. 2 and 3, while the rear wall 16 is formed at substantially right angles to the bottom portion 13 and said buckets are secured to tlie inner wall of the drum by a plurality of rivets 17.

Each alternate’ bucket 'A ^;of^; the series is • £. ΐ end of the drum as'shown ’iri'Fig. 8 'ahd'each 60 alternate' bucket of-staid seiife is· ;nclined,'at oppositL· directions ^las indicated In tFig.¹ / . For example,'the Idfi^bjick^ts Aare incliit^d.* downwardly arid toward' tire* left; and' arb adapted as the drum iAr'eyoW'ed to'disHiaitge’ < their contents' to.xvafd t'he brill bftthe.ilituin' upon the left hand side thrirbdfj’ v'hiH alternate bucket B. inclines dowrH^itraWjTAward the right at' Aubstaritiallf 'rigfiUaK'gles to the buckets’ ^lA( Xvhbreb'V' the •.bn'ntbnI&mF such buckets as the drii'in ιέrevdl^ett^illJBbi. discharged · toward'thb djiposite drum. Thbs as said' drilfij is revolybdp'tW contents therein Will’ be! alterimtCly tlhbwjif toward tbe'riglit-Ind left, the same Beihgkhsy charged frb'm’the buckets of the series as f ^y approach' arid 'rise’ Above the longitudinal axis of the druni, Whereby the contents 6ftlt£ drum.becomes thoroughly inixed? . .*/·,»

When the poritehts. Of the 'drum has been thoroughly inixed, tne same is discharged thefefi-imi while . the druin' is revolyftig thrbugh the pivotalfy supported trough 18 and the stationary' extension; thereto, .19;. The trough 18 is pivotally’slipporteil at its respective sides from the horizontal arms 19, upon the pivotal bolt or rod 20, said arms 19 being connected with the frame 21 b} the standard 22 in the ordinary manner.

While the concrete is being mixed preparatory to discharging the same, the pivotally supported trough 18 is inclined downwardly and inwardly as indicated in dotted lines ¹¹¹Fig. 1, whereby tlie concrete as it falls from the buckets therein will discharge toward the left hand side of the drum, reference being had to Fl·'. 1. When, however, the concrete has been sufficiently mixed and it is desirous to discharge the same, the trough 18is turned upon its supporting pivot 20 from the position indicated in dotted lines, to that, shown, in Fi. 1, when its outer portion is adapted to rest within the inner end of the· portion 19, wherebv as the conciete is carried up bv trie revolving buckets it will be discharged from the drum through said pivotal trough 18 and stationary extension 19 thereof. Motion is communicated to the pivotally supported trough for the purpose of inclining the same in the two positions shown and indicated through the elbow crank lever 23, pivotal bolt 24, link 25, pivotal bolt 27 arid lever 28, the ! Each alternate' bucket Ά oi- the senes is preferably’made longer thari theinterfnedifiie buckets B and.'extentls laterally to near’rihri oc

100

10E

110

899,414 elbow crank lever 23 is pivotally supported from one of the arms 19 upon the bolt 29. Thus it will be obvious that by pressing downwardly upon the arm 30 of the elbow 5 crank lever 23. motion will be communicated to the pivotally supported trough 18 and the same will be inclined from the position shown to that indicated in dotted lines in Fig. 1. When, however, it is desirous to discharge 10 the contents of the drum therefrom, said trough is brought back to its normal position shown by drawing upwardly upon the arm 30. 31 is a hopper through which the material to be mixed is discharged into the 15 drum as the same is being revolved. Tlie hopper 31 is supported from the supporting frame of the vehicle upon the standards 32 with which standards' it is connected by the rivets 33 in the ordinary manner. The 20 frame 2 upon which the drum 1 is supported is preferably supported on a wheeled vehicle of ordinary construction by which the machine is readily transported from one place to another.

The respective ends of the drum 1 are preferably curved inwardly toward the center of the drum, whereby the concrete mixed therein has a tendency as the drum is revolved to be thrown by gravity toward the center of 30 the drum in position to be acted upon and elevated by the annular series of buckets and whereby the tendency of the concrete to accumulate as heretofore in the comers between the ends and the periphery of the drum is thereby avoided.

It will be understood that the arm 28 is rigidly affixed to the side of the trough 18 by nails, screws, or in any ordinary well known manner. It will also be understood that 40 when the trough 18 is inclined in the position, indicated in dotted lines in Fig. 1, the con crete which is deposited therein by the revolving drum will be discharged toward the inlet side of the drum. Also that when said trough is inclined in the opposite direction as 45 shown in Fig. 1, the concrete will be discharged from the drum into the stationary

I trough 19.