US1019737A - Concrete-mixing machine. - Google Patents

Description

C. 0. HOGLUND.

CONCRETE MIXING MACHINE. APPLICATION FILED JUNE 29, 1911.

1,019,737. Patented Mar. 5, 1912.

3 SHEETS-SHEET l.

C. 0. HOGLUND.

CONCRETE MIXING MACHINE. APPLICATION FILED JUNE 29, 1911.

1,019,737. Patented Mar. 5, 1912.

3 BHEETE-SHEET 2.

3' 65 v 0.0.Hoglumd.

COLUMBIA PLANMRAPN C0 WAsmNuToN. n. C.

UNITED STATES PATENT OFFICE.

CARL O. HOGLUND, OF CROOKSTON, MINNESOTA.

CONCRETE-MIXING MACHINE.

To all whom it may concern.

Be it known that I, CARL O. HOGLUND, a citizen of the United States, residing at Orookston, in the county of Polk and State of Minnesota, have invented certain new and useful Improvements in Concrete-Mixing Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in concrete mixing machines.

The invention consists in the construction and arrangement of parts as will be hereinafter described and particularly pointed out in the claim.

In the accompanying drawings: Figure 1 is a side view of my improved concrete mixing machine. Fig. 2 is a top plan view thereof; Fig. 3 is a central vertical longltudinal section; Fig. 4 is a vertical cross section on the line tl of Fig. 2; Fig. 5 is a similar view on the line 55 of Fig. 1; Fig. 6 is a detail perspective view of the delivery chute showing the construction and arrangement of the door for opening and closing the discharge passage thereof.

Referring more particularly to the drawings 1 denotes the main supporting frame of the machine, said frame being provided with suitable supporting wheels 2 whereby the machine may be readily moved from place to place. Arranged on the main frame 1 is a superimposed trough supporting frame 3 in which is disposed a mixing trough 4 whose bottom inclines forward as seen in Fig. 3. Extending throughout this trough is a central longitudinally disposed agitator shaft 5 on which is secured a series of radially projecting curved agitator arms 6, said arms being preferably arranged in pairs-and connected by bars 7 which at their inner ends are secured to the sleeves ti on the said shaft 5 so as to form spiral blades whereby when the agitating shaft is revolved the contents of the trough will be thoroughly mixed and gradually fed forward toward the discharge end of the trough. The shaft 5 is driven in the proper direction by a suitable operating mechanism hereinafter described.

Secured to one side of the main frame 1 of the machine substantially midway between the ends of the trough is a sand and Specification of Letters Patent.

Application fiIed June 29, 1911.

Patented Mar. 5, 1912.

Serial No. 635,935.

gravel hopper 8, while on the opposite side of the frame is arranged a cement hopper 9. It will be observed that these hoppers 8 and 9 are hung extremely low, the purpose of this construction being to facilitate the feeding of material into them as it needs replen ishing, and to utilize its weight in giving stability to the machine. A still further point of advantage in this construction is that it permits the superintendent to observe constantly whether these hoppers need replenishing, and it permits an inspector (if one be present) to observe whether the material fed into them is of the proper consistency. Secured at its lower end to the inner end of the superimposed frame 3 and supported by standards 11 and 11 is a chute 10 for the sand and gravel and the cement, its front and rear walls being closed and upright and its side walls being closed as seen in Fig. 6 and diverging at their upper ends into Wings 10 which stand beneath the delivery ends of the elevators next to be described. On the forward standards 11 are shaft bearings 12 in which is revolubly mounted an elevator operating shaft 13 on one end of which is fixedly mounted a sprocket gear 15. The gear 15 is connected by an elevator chain 16 to a sprocket gear 17 arranged in the sand and gravel hopper 8 and revolubly mounted on a suitable sup porting shaft 18 journaled in the main frame 1 as shown. The elevating chain 16 is provided with suitable elevating buckets 19 whereby the sand and gravel is elevated from the hopper 8 and discharged into the chute 10.

On the opposite end of the shaft 13 is fixedly mounted a sprocket gear 20 which is connected by an elevator chain 21 with a sprocket gear 22 mounted on the opposite end of the shaft 18 from the gear 17 in the cement hopper 9. On the elevatin chain 21 is arranged a series of elevating buckets 23 which are adapted to carry the cement upwardly from the cement hopper 9 and discharge the same into the chute 10 from which the cement together with the sand and gravel are discharged into the adjacent end of the mixing trough 4 and are thoroughly mixed together by the agitating mechanism hereinbefore described.

Arranged on one end of the main frame 1 construction and is preferably in the form of a gasolene engine. On the inner end of the shaft 25 of the engine is fixedly mounted a spur gear pinion 26 which is engaged with a large gear 27 fixed on a suitably mounted countershaft 28. On the inner end of the shaft 28 is fixedly mounted a spur gear pinion 29 which is engaged with a spur gear 30 fixedly mounted on the agitator operating shaft 5 whereby the latter is driven in the proper direction for operating the agitator.

Mounted in suitable bearings on the upper end of the standards 11 of the hopper 10 is a power transmitting shaft 31 on the inner end of which is fixedly mounted a spur gear 32. The gear 32 is in operative engagement with the gear 27 on the countershaft 28 whereby said shaft 31 is driven in the proper direction. On the outer end of the shaft 31 is fixedly mounted a beveled gear pinion 33 which is engaged with a similar pinion 13 on the elevator operating shaft 13 whereby said shaft is driven in the proper direction for operating the endless cement and sand and gravel elevators.

Arranged on the trough supporting frame 3 is a water tank 34 having in one side a discharge faucet 35 which connects with a perforated water distributing pipe 36 arranged above the central portion of the mixing trough whereby water may be discharged in the proper quantities into the trough and onto the material being mixed therein. The pipe 36 is provided substantially midway bet-ween its ends with a cut as valve 36 whereby the water may be cut off from the outer portion of the pipe when desired.

The sand and gravel are placed in the sand and gravel hopper and the cement in the cement hopper in any suitable manner for being elevated or conveyed to and discharged into the chute 10 and from thence pass into the mixing trough and after being thoroughly mixed and moistened in said trough are discharged therefrom to a dis charge spout 37 secured to the rear end of the main frame 1 below the discharge end of the mixing trough as shown and from which the concrete or finished material is shoveled or otherwise discharged where the same is to be laid or into receptacles for conveying the same to its place of disposal.

The chute 10 is provided with an inclined bottom 38 which communicates at its lower end through a discharge opening 39 with the inner end of the mixing trough 4 whereby the material is discharged from the chute into the trough- The discharge opening in the chute 10 is provided with a door 40 slidably mounted in suitable guides 41 arranged on the front side of the chute as shown. The door 40 is provided with a suitable operating mechanism, said mechanism comprising rack bars 42 secured to the outer side of the door adjacent to its opposite side edges and with which are engaged pinions 43 fixed on a crank shaft 44 revolubly mounted in suitable hearings on the outer side of the chute and having on one end a crank handle 45 whereby the same may be operated to engage the pinions 43 with the racks 42 whereby the door is raised and lowered when desired. The shaft 44 is also preferably provided with a small ratchet gear 46 with which is adapted to be engaged a locking pawl 47 pivoted to the adjacent portion of the chute whereby the shaft is locked to hold the door in its open or closed position. By providing the chute 10 with the door 40 for opening and closing the discharge opening therein the material dumped into the chute may be continuously fed therefrom to the mixing trough or the door may be closed and a certain quantity of material placed into the chute before being discharged therefrom into the mixing trough thus permitting the machine to be employed for mixing the material in batches or for mixing the same continuously.

From the foregoing description taken in connection with the accompanying drawings, the construction and operation ofthe invention will be readily understood without requiring a more extended explanation.

It will be noted, as above explained, that the low-hung hoppers 8 and 9 are of advantage for the reasons set forth; the mixing trough 4 is disposed between these hoppers and is as low as possible upon the main frame, while the water tank which is above the trough can easily .be fed through a hose or other connection; and the chute 10 which is disposed across the inner end of the trough 4 has wings 10* at its upper end forming receiving tables for the material dumped by the two elevators, while its door or gate 40 may be opened from time to time to deliver the material in batches to the trough, or may be set as above explained so that there will be a constant delivery into said trough. Therein the spiral blades 7 not only thoroughly mix the materials with each other and permit a free admixture of a proper proportion of water, but by their shape and disposition feed the mass slowly forward until it reaches the spout 37 at the exit end of the machine. During all this time the heavy materials are as low as possible which results in the advantages above set forth, and the various instrumentalities are grouped around each other in the smallest compass and mounted upon a unitary framework and single running gear in compact form.

Having thus described my invention, what I claim is: v

A concrete mixing machine comprising a supporting frame with a trough arranged within the same and having a forwardly insecured to the curved blades, and means for 10 operating the shaft.

In testimony whereof I have hereunto set my hand in presence of two subscribing witclined bottom, a longitudinal shaft extending the length of the trough and having thereon sleeves or collars, and a series of transverse radially projecting curved blades arranged in pairs thereon, a plurality of messes. longitudinal bars twisted in spiral form to CARL O. HOGLUND. provide blades, each pair of said longitudi- Witnesses:

Trrno. NELSON,

nal bars having one of their ends directly CONRAD A. FINsANn.

secured to said sleeves and their other ends Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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