US1111974A - Concrete-mixer. - Google Patents

Description

K. R. SOHUSTEB. CONCRETE MIXER.

APPLICATION IILED APR.25,1914.

1,11 1,974. Patented Sept.29,1914.

3SHEETS-SHBET 1.

Pf. C. W KarZJZ.Schu5ter I "ran/15y;

K. R. SGHUSTER,

CONCRETE MIXER. APPLICATION FILED APR. 25, 1914.

1 1 1 1,974. Patented Sept. 29, 1914.

3 SHEETS-SHEET 3.

' Br 7/2, fi. l I l i o arramvsrs iii ' mixtures of. the ingredients are effected by facture.

ii E STATES PT NT. OFFICE.

KARL It. SCHUSTER, OF NEW YORK, N. Y.

CONCEETEJQZ'KER.

L111 31 @711 Specification of Letters Patent. Patented Sept, 29, 1914 Application flied at, 1-914. Serial No. asaass. To all whom it may concern: period; and means are provided for distrib- Be it known that I, KARL R. Scrmsrna, a citizen of the United States, residing in the city of New York, borough of Brooklyn, county of Kings, and State of New York, have invented a certain new and useful Concrete-Mixer, or which the following is a I specification.

This invention is a concrete mixer characterized by important advantages over 1 machines common in the art, wherein the uting the agitating fluid in different directrons at the bottom of the container.-

ihe machine is especially well adapted for mining concrete, the coarse aggregate of The fluid pipe and valve cannot become obstructed by stones or other large pieces which may find their way into the container. The machine is so simple that the possibility of break downs is vc 1 remote, and it is economical of manufacture. I An important advantage is the availabilaty ot' steam, or other heated gas, as the agitating. agent, whereby the materials are heated to a certain extentsimultaneously with the mixture thereof. This makes it practicable to make concrete in low temperatures andduring cold weather, in which respect the ordinary mechanical mixers are useless.

()ther featuresa-nd advantages of the invention will appear in the course of the following detailed. description.

In the drawings, Figure l is a side elevastirring them mechanically.

The objects in view are to expedite the operation of mixing the constituent parts of concrete or other materials; to thoroughly combine the materials; to enable the mix operation to be carried on successfully during cold Weather; to facilitate the rations of charging the materials into ti nachine and of discharging the resulting mixture therefrom; and to simplify the structure to the end that it is durable and e'fiicient in operation and economical of menu- Broadly stated, the invention embodies a tiltable container equipped with means for supplying air, gas or steam, to the interior thereof, whereby the constituents of the concrete or other mass are agitated by the pressure of aeriform fluid, said container being movable bodily to one position for receiving the materials and being movable, also, to another and different position for discharg-' ing the mixed mass.

In addition to the novel structure thus briefly outlined, the mixer is characterized by the use of several important features, viz :'The means for supplying air, steam or I gas to-the container are movable with said container so as to be normally in operative relation thereto; the flow of the fluid is controlled by a normally closed valve which is opened automatically when the container is I full lines illustrating the mixing position of the container, one of the dotted lines showing the charging position of said container and the other dotted line illustrating the discharging position of the container. Fig. 2 is a vertical section, partly in elevation, the plane of the section being indicated by the dotted line 2-2 of Fig. 1. Fig. 3 is a horizontal section through the operating mechanism for opening the valve when the container assumes the upright position wherein the materials are mixed. Figs. 4 and 5 are detail sectional views, partly in elevation, ilhmtrating different forms of deflectors by rected in difierent paths within the lower part of the container. Fig. 6 is a side elevation of another embodiment of the inventionwherein the cover is movable with respect to the container. Fig. 7 is a sectional view on the line 77 of Fig. 6.

A designates a container, herein shown as a vessel comprising an upper cylindrical moved, after chargin into a normal position, thus admitting t e fluid at the time required to efi'ect the agitation of the ingredicuts; a cover cooperates with the container I in order to preclude the fluid admitted by the valve from ejecting or blowing out the sel is open at its upper end and it is mounted for tilt-able movement by trunnions bb se cured to the opposite sidesof the vessel I above the conical part a thereof. The trunnion b is solid, whereas the ingredients, but at the same time the air or gas is free to escape from the conta ner through a suitable vent so that the contalner is not sealed at the period of admitting the agitating agent, or in fact at any other which may be stones of any practicable size.

which the agitating fluid is dition of a mixer embodying my invention, the

part a and a lower conical part a. The ve'sother trunnion l 1 0 1'5 this part of the structure may be varied stuflin'g box D: is provided between trunnion -The trunnions are supported in bearings '0 7X- i's tubular so as to produce a passage 0.

provided on a supporting frame, herein shown as consisting of side members B attached toa base One of the side members ,i'sprovidedwith a bracket (Z to which is attached the casing e of a valve E, said valve being herein shown as a turning or plug valve although it is evident that any other form of valve maybe employed. The valve body 6 is provided with a passage e for the flow of steam. air or gas through the valve when the latter is opened. Suitable means are provided for'coupling a pipe or hose to the valve body, but as the details of within wide limits, I have not considered it 1 necessary'to illi1strate' the pipe or hose for feeding a-ir, gas or steam to the container.

C-isa pipe attached tothe container so as to be movabletherewith. As shown, this pipe is positidned exteriorly to the conical part a of the container,- the lower end of said pipe having an elbow 0 which, is at tached' to the lower extremity of, said coni- CaLmember' a forming a partof the" on-' -tainer' A.' The upper end of the pipe;

attached to trunnion b so as to communicate with the passage c'therein.- The body eof the pipe C.

the valve is connected with-the hollow trunnion bby a pipe D, one end oi which is attached to the valve body-e-soas to communicate with the passage 6 therein, whereas the other end of said pipe 1) isreoeivedw thin the passage 0v of theihollow' trimnion." A

b and pipe'D s'oastominimize the leakage of the agitating fluid which is-supplied from.

the, valve throughflthe hollow 'trunnion: to

It is apparent that pipe is attached 'to the tank and. the hollow trunnion for [movement therewith when the hopper is tilted either to the charging position or to the discharging position, whereby the pipe is retained at all times in an operative relation to the tiltable container. Provision is thus made for-supplying the agitating fluid to the ldwer part of the container when,

the valve E is open.- but normally this valve is closed inorder to cut 0d the flow of the agitating fluid into the container. said valve being opened only w'hen the container assumes theupright position of Figs. 1 and 2 subsequent to the deposit of the materialswithin said container.

Suitable means are provided for imparting a tilting movement to the container.

\Vhile various devices may be used for this purpose it 1s preterred to employ hand-operated mechanism illustrated in Fig. 2.

The solid trunnion 7) extends. through its bearing 0' in the frame and to the protruding endof this solid trunnion is secured an internal gear segment F. the same being shown as having a flange f provided with gear teeth on the inner edge thereof. With this internal gear segment meshes a pinion F. 'the same being secured to a short fwhich. is provided with a hand-crank F said short shaft bein journaled in a bearing of a bracket or hanger f secured firmly to one of the side members B of the main frame.

G designates a cover which is separate from the container A and is supported in a fixed position on the upper part of frame B. The cover closes the open upper end of the container when'the latter is in the upright position shown in the drawings, the main function of said cover being to prevent the piece of metalthe curvature of which is concentric tothe axis of movement of the tiltable container. The upper open end of the container is curved on an arc concentric to that of the cover C. and when the container isint-he upright position the upper edge of said container fits close to the under surface of the curved cover.

The container is not sealed when in the upright position and in coiipcrative relation to the cover but. on the' contrary. said cover is provided with a vent opening 9 so that in the mixing position the container is opento the-atmosphere. This vent g is surrounded by a vent tube G within which is secured a battle g whichis positioned directly. over the vent opening 9. It is apparent that the air or steam supplied to the lower part of the container is free to escape through the opening 9 and the tube-G. but the cover Grand the baffle a minimize the outflow of any of the materials present in the container under the pressure of the agitating fluid supplied by pipe C to the bottom part of the container.

lVhile various forms of means for automaticall opening the valve may be employed. I prefer the mechanism sho 'n in Figs. 1. i2 and 3 of the drawings. one of the side frumes'B is provided with a bearing f r horizontal rocksh: ft 11 the end of which project beyond the bearing". Ar one end of this rockshaft is secured. a lever arm 1 by means of a he i. said lever arm being provided with an anti-friction roller 2" which is in the path of a cam plate K. Said camplate is fixed in any suitable way to the outside of container A. said plate being shown as having inclined edges 76 and an operative top edge is. as shown in full and dotted lines in Fig. 1. On the other end portion of the rockshaft.H is secured another lever arm J, the latter bein made fast with the rockshaft by a key j, sai lever arm J being provided with a bent end j. Fitted loosely on the rockshaft is an arm L which is positioned quite close to the lever J so that the bent end j of said lever J will'contact with the loose arm L. This arm L is attached to adepending valve rod M, the lower end portion of which is pivoted by a pin m to a crank arm m of valve E. Said valve is held normally in a closed position end of which is fastened to a lug 0 of the valve rod M, whereas the other end of said sprin is anchored on the frame by a-fixed pin 0 said spring acting valve rod M and for closing valve E.

The elbow end of 0 of the pressure pipe C is connected in any suitable way with the lower extremity or apex of conical section a forming a part of the tank or container. Said pipe may be so positioned that the air, steam or gas will point toward the center of the mass Or the pipe may discharge the agitating agent toward one side of the tank, as shown in Fig. 2. Furthermore, a deflector P may be positioned within the lower portion of the tank and opposite t the outlet from the pipe, said deflector consisting of members spaced to roduce openings 1, as shown in Fig. 4, w ereby the deflector acts to distribute the inflowing steam or air in different directions Within the tank.

Again, the deflector Q may be positioned turning lever J so its within the lower part of the tank opposite to the outlet from the pressure pipe, as shown in Fig. 5, said deflector Q having downwardly converging side walls which are substantially parallel tothe walls of the container bottom a. These different modes ofdirecting the inflowing agitating agent so distribute the steam or air as to attain the best results in making mixtures of aggregates of various sizes or weight.

he operation is as follows :-The container or tank A is turned to the dotted linev position toward the left in Fig. 1 in order to swing its open upper end beyond the closure G, at which time the materials to form the mixture are dumped or otherwise deposited into the container. The container having been charged it is swung back to the upright position beneath the closure G, as shown in full lines in Figs. 1 and 2, and during this movement of the container one edge In of cam K contacts with the roller 2' of lever I, thereby rocking shaft H and with the loosely mounted arm L. This arm is operated during the return movementof the container to the upright-position for the purpose of lifting the rod bent end j engages M against the.

returns to a normal position below the cover.

he steam or air is thus supplied to the lower part of the container so as to flow upwardly through and as a result of this 0 eration the ma terials are agitated to such an extent as to mix them thoroughly within a very short space of time. The inflowing agitating agent has a tendency to lift the materials within or blow them out of the container through the upper openend thereof, but the escape and waste of the material preeluded by cover G and baflle 9' within the vent tube G, said vent tube aifording a free outlet at all times for the agitating agent supplied to the container. terials having been mixed the container is turned in an opposite direction and to a discharging position, as indicated by the dot and dash lines in Fig. 1, whereby the mixed material is discharged through the open end of the container, said material flowing bygravity from the container. The operator now turns the gear in an opposite direction so as to restore the container, first, to a normal position below the cover and then to swing the container to the charging position indicated in dotted lines, but dur: ing the return movement of thecontainer the valve mechanism is not operated, for the reason that the other edge 7c of cam K acts on the arm I and shaft H so to turn the bent end of arm J away from the loosely mounted arm L which controls the valve, as a result of which operation of the container to a charging position withdraws arm J to a position where it will not act upon the valve mechanism so as to open said valve. The container having been returned to a charging position the operations of depositing material therein and of mixing and discharging'said materials are renewed.

It will be understood that any suitable agitating agent may be supplied to the interior of the container, for the purpose of mixing the materials therein. In this connection it is desired to call attention to the fact that steam or other heated agent :mrv be supplied to the mixer for the purpose of mixing and heating the materials in low temperatures. This is particularly useful in preparing and installing concrete during cold weather, under which conditions t e ordinary mixer cannot be used to advantage.

the materials therein,

the return rt-ho frame so that the container is' movable relative thereto; but when the -invention is to be embodied in a machine of increased capacity, a larger container is employed,- it 'being. desirable, to increase thecross sectional area of saidconta nerv rather than the .iver

t-ical dimensions thereof. Under. such oi-rcumsta'nces, it preferred to employ .a cover which, instead ofhaving a fixed relation to the-.eontainer, is mounted for movement with "respect. to: said container. Accordingly,-; the cover G. of Figs. 6 and 7 is supi'rt-(liDQI' open at theupper end, means forsupplying anagitnting agent under pressure to ported. for movement simultaneously with the-container, and preferably the cover.

swings' in' are-opposite direction to that in which the container itself moves. Said fcover G' is carried by parallel arms S S whichare fitted loosely on the trunnions b b,

"of the container, one of saidarms being formed with a gear segment T. The trunnion b is provided with another gear segment ,T', theilatber being in opposing or fac- -ing'-r el ation .to the segment ,T. A shaft V is journaledjna suitablebearing on the side frame B, said shaft being positioned inter. .mediate the facinggear-segments TT. and

secured-rigidly tothis shaft is agear pinion .U,the teeth of Whichare in mesh with the gear-segments as shown. "Suitable means are provided for operating the shaft; a hand crank .u' is shown for. this. purpose, although evident that the shaft may be turned by power if desired.

1 posite-directions to each other, and thus't-he movement of. :the container in one direction and to a charging position. will result in a movement' of cover G' in an opposite direc tion so as tofully uncover the open end of the container and permit the materials to be deposited therein. Of course, the back ingfposition will be followed by a return of the, cover G. to a position over the container 'so as to prevent the materials from being blown out of-the container when the agitating-agentis admitted thereto.

and embodies the several features of the invention as, herein shown and described.

Having thus fully described the invention,

what I claim as new, and desire to secure by.

Letters Patent, is:

.' LA mixer embodying a pivoted con-' (11s apparent-thatiby turning theshaft, U in one direction, the gear segments T T will}.. be turned simultaneously and in op-- and a pressurepipecoimected with saidhol- In all other respects the mixer of Figs. 6

bottom portion thereof, said lcont ainer't-hem ing movable to a charging position and to a discharging position without disconnect ing said supply means.

3. A mixer embodying a tiltable con- :tainer, means for-supplying an agitating agent under pressure tojsaid-container, and

-.a cut (at controllable by the-tilting movement of the container for opening and closing said supply means. v

- 4:. A mixer. embodying a pivoted 0on said containen-gand .a' closure for said open end of the containensaid' container :he'rng movablerelativeto said closure. p

5.- A mixere'mbodying a pivoted con .tainer open at the upper end, means for supplying an agitating agent to said c011 miner. and a closure for said'open-end of :the container, said closure being provided with a normally open vent, whereby the closure prevents the materials from being blown out of the container by the action of said agitating agentand the latter is free @to escape through said-vent, said container ibeing movable relative to the closure for as suming charging or discharging positions.

, 6. A mixer embodying a pivoted con- :tainer, means movable with the container for supplying an agitating agentto the in- !terior of said container, and Valve mechanism controllable by the movement of said con tainer "for admitting the agitating agent :t-he/reto when it occup es a. substantiallyuprright position.

LA mixerembodying. a container pro-- widedwith trunnions for ivotally supportiing it, one of said trunni nsbeing hollow,

ilow trunnion and with .t-he'bottom'portion of said container so as to supply'an agiand the pipe to the interior'of the container at the bottom portion thereof;

8. A mixer embodying a container providechwith trunnions for pivotally supporting it, one of said .trunnions being hollow,

' a pressure pipe connected to said hollow trunnion and to the container for suppl ing an agitating agent tosaid container, and

. a valve operable by the pivotal movement of said container for controlling the flowof the agitating agent tosaid container. v

9. A mixer embodying a tiltable container, means unitary. with said container for supplying thereto an agitating agent under pressure. said container being movable -from a mixing position to a charging position and to a discharging position. a valve for controlling the flow of the agitating agent to said container, and operating means for said valve, said operating means being actuated by the movement of the container from'its charging position to a 'tating agentthrough said hollow trunnion wardjmoremcnt of the container to'a mixmixing position and being idle when the container moves into and out of its dis'- able from a mixing position to a charging positlon and'to a discharging position, a

valve for controlling the flow of the agitating agent-to said container, and valve operating means including a cam movable with the container and a plurality of levers one of which is connected with the valve and another is in the path of said cam;

11. A mixer embodying a tiltable container, movable to a charging position and to a discharging position, valve-controlled means unitary with said container for supplying thereto an agitating agent under pressure at a period when said container occupies a position intermediate said chargand discharging posltlons, and means for distributing the agitating agent in different directions within the container.

12. A mixer embodying a tiltable container movable successively to charging and discharging positions, valvecontrolled means unitary with said container for supplying thereto an agitating agent under pressure at a period when said container occupies a position 'intermediatesaid charging and discharging positions, and a deflector positioned opposite to the outlet from saidsupply means for distributing the agitating agent in different directions within said container. I

13. A mixer embodying a tiltable container movable successively to charging and discharging positions, valvecontrolled means unitary with said container for supplying thereto an agitating agent under pressure when said container is in a mixing position intermediate said charging and discharging positions, and abaflie positioned within the container and a over the outlet from said supply means for precluding the entry ofmaterials into the supply means. 14. In a-mixer, the combination of a tiltable container open at the upper end, a closure for said open end ofthe container, said closure being disconnected from the container and the latter being movable relative to said closure for; assumin charging and discharging positions, said 0 osure havmg a normally open vent, an inlet plpe for supplyingan agitating agent to the bottom porthe vent.

tion of said container, and a baflle in the path of the agitating agent escapingzfrom 15. In a mixer,,the combination with a t1ltable container,'and a pressure pipe connected therewith, of 'a valve for controlling the flow of an agitating agent through said pipe, a rock arm linked to the valve, a' valve operating member on the containen-a second rock arm in the path of said 'valve 0 ratingmember, 'and-athird arm 0 rated by the movement of the second roe arm and cooperating with the first rock arm for.

opening the valve when the container moves from the charging position to the mixing position. I

16. Ina mixer, the combination with a tiltable container and means for supplying an agitating agent thereto, of a closure for said container, said closure being movable simultaneously with the movement of the container. v a

17 In a mixer, the combination with a tiltable container and means for supplying an agitating agent thereto, of a plvotally supported closure for said container, and means operating to impart movement to the. closure simultaneously with the tilting move-. ment of the container. '18. In a mixer, the combination with Ca tiltable container and means for supplying an agitating agent thereto, of a ,pivotall'y supported closure for said container, and operating means coiiperating with theflcontainr and the closure for imparting'move: ment to the closure in an opposite direction to the container and simultaneously therewith.

19. A mixer-embodying a container pivoted for movement successively to charging and discharging positions, means unitary with said contamer for'supplying a mixing agent thereto, and a'cut oii cooperating wlth said unitary supply means and controllable upon the pivotal movement of-the container for admittingthe mixing agent when said container is 1n a position intermediate the charging position and the dischargingposi- In testimony whereofI-liave myname to thisspecificationfin the presence of two subscribing witnesses.

Witnesses H. I. BEMBORD, M. C. Ronmc'u'nz.

KARL. n. sonus'rna;

Images