US1689963A - Concrete mixer and conveyer - Google Patents

Description

Oct. 30, 1928. 1,689,963

B. H. PELTON CONCRETE MIXER AND CONVEYER Filed May 4, 1926 INVENTOR. BENJAMIN r1. PELTON ATTORNEYS.

Patented Oct. 30, 1928.

UNITED .STATES.

. 1,689,963 PATENT OFFICE.

BENJAMIN H. PELTON, 0F CARLSIBAD, CALIFORNIA, ASSIGNOR TO B. H. PELTON,.JR., 0F

\ CASPER, WYOMING.

CONCRETE MIXER AND CONVEYER.

Application filed May 4,

My invention relates to a concrete mixer and conveyer adapted to be used for conveying concrete in the construction of large concrete structures, such as buildings, bridges, or structures where concrete is to be conveyed a considerable distance.

Heretofore in the construction of concrete buildings, bridges and the like, the concrete v for the construction was mixed at or conveyed by elevator to a central point and distributed from the central point by dump trucks or by tubular conveyers or chutes. The use of ordinary tubular conveyors or open chutes has been found ineffective and impractical in that the finer and coarser aggregates separatefrom each other and from the thin concrete, making an uneven pour 1n the concrete structure, often to the extent of considerably weakening the structure at certain portions.

The objects of my invention are: first, to provide means whereby concrete is received from the mixer or elevator and conveyed to the desired point and continually mixed.

when being conveyed; second, to provide a positive tubular conveyer whereby concrete or other materials may be conveyed from a central point to any position desired and in any reasonable direction, either downwardly, on a level, or upwardly from its central point of distribution or supply, or to the side thereof; third, to provide a sectional positive conveyer which may be made in any length desired and easily directed to the point desired; fourth, to provide novelly constructed positive conveyer extension sections; fifth, to provide a novel means for operatively connecting the conveyer screws of the conveyer sections with each other; sixth, to provide novel means for effectively coupling the conductor portions of the conveyer sections; seventh, to provide a conveyer of this class which may be operated at a relatively slow speed for conveying material thereto and also at a relatively high .speed for flushing the conveyer; eight-h, to provide as a whole a novelly constructed mixer and conveyer of this class, and ninth, to provide means of this class which is simple and economical of construction proportionate to its functions, durable, efficient, and which. will not readily deteriorate or get out of order.

With these and other objects in view, as will a pear hereinafter, my invention consists of certain novel features of construction,

1926. Serial No. 106,616.

combination and arrangement of parts and portions, as will behereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawings and to the characters of reference thereon, which form a part ofthis application, in which:

Figure 1 is a fragmentary side elevational view of my mixer and conveyer in one form of construction, showing its relation with a concrete mixer and showing certain parts and portions of the conveyer broken away and in section to facilitate the illustration; Fig. 2 is an enlarged fragmentary sectional elevational view, showing the connection or joint between two sections of the conveyer; Fig. 3 is an end view of one of the conveyer sections, taken at 33 of Fig. 2, and Fig. 4 is a fragmentary View in plan, showing the drive and gear shifting means.

Like characters of reference refer to similar parts and portions throughout the several views of the drawings.

The one or normally stationary end of my concrete mixer and conveyer is mounted on a platform 1, which is preferably in the form of a portable platform or truck. On and above the platform or truck 1 is mounted another, shiftable platform 2, the one end of which is pivoted on the platform 1, as indicated by 3 in Fig. 1. The opposite end of the platform 2 is vertically adjustable by means of-a screw or screws 4, the lower end or ends of which is pivoted on the platform 1. The screw 4 extends through the threaded member 5, which is pivoted on a horizontal axis on brackets 6.

On the platform 2 is mounted the power plant 7 which may be in the form of an internal combustion engine. On the platform 2 is also mounted a pair of brackets 8, at the upper ends of which is supported the conveyer drum or casing 9. In this drum or casing is revolubly mounted a conveyer screw 10, the one end of the shaft 10 of which is revolubly mounted in the head 9 of the casing, and the opposite end of which is revolubly mounted in the journal portion of the inwardly ofi'set bracket 11, which is in the form of a spider having three legs supported by the wall at the open end of the casing 9, as shown in Figs. 1 and 2. On the end of the shaft 1O extending beyond the head 9 are provided drive- gears 12 and 13, which are adapted to be driven respectively by drive- gears 14 and 15. The latter gears are mounted on a sleeve 16, which is shiftably mounted on the shaft 7 of the engine 7. The sleeve 16 is adapted to be shifted on the shaft 7 by means of a gear shift lever 17 For normal operation of the mechanism, that is, when materials are desired to be conveyed thereby, the lever 17 is shifted to the solid line position, shown in Fig. 4, which connects the drive-gear 14 with the gear 12.

At the upper portion of the casing or drum 9 is provided an upwardly flaring chute or spout 18 for receiving concrete from the chute 19 of the concrete mixer 20. Concrete, however, may be discharged into the chute 18 from an elevator, if desired. The one end of the conveyer casing 9, or the portion of the casing around the chute 18, is raised from the upper portion of the conveyer screw 10, as indicated by 9 in Fig. 1, so that large stones or other aggregates will not be crushed or ammed between the upper portion of the conveyer screw and the casing. The opposite end of the casing 9 from the head 9 is circular, as shown in Fig. 3.

The open or discharge end of the conveyer casing 9 may be extended to any desired length by the conveyer tube sections 21. One end of the tube sections 21 are flared outwardly, as indicated by 21. These outwardly flared portions 21 receive the open ends of the adjacently positioned conveyer sections. Said tubes or sections are secured together at their adjacent ends by means of bolts 22, there being preferably three in number. These bolts extend through lugs 23 near the ends of the tubes or sections. The holes in these lugs are preferably tapered from their opposite sides, or the same may be merely enlarged, to receive the bolts 22 when positioned at various angles. The opposite sides of the lugs 23 are rounded to provide even bearing surfaces for the bolt-heads and nuts, as shown best in Fig. 2. The tubes or tube sections may be coupled together in a straight line or at slight angles, as shown in the drawings, the practical maximum of these angles being between ten and fifteen degrees. The outwardly flared portion at one end of the tubes and a beveled portion at the adjacent end of the adj acently positioned tube provide a relatively close joint between the two sections or tubes of the connected conveyer sections. Slight openings between the connected ends of two tubes may be readily closed by tightly takin up the bolts 22, the adjacent ends of the tu es being slightly distorted by such takeup to provide a reasonably close joint.

At the o posite ends of the tube sections 22 are secure inwardly offset spider brackets 11, similar in construction to the one previously referred to. In these brackets 11 are revolubly mounted the opposite ends of the shaft 24 of the conveyer screw 24. To the opposite ends of the shafts 24 of the conveyer screw, as well as to the end of the shaft 10 extending through the brackets 11, are secured transuniversal joint member 26 having lug portions 26 at its opposite ends and positioned at right angles to each other. These lug por tions 26 extend into the transverse slots or grooves of the universal joint members 25, as

shown best in Fig. 2. The spider brackets 11 are offset inwardly to provide space for the universal joint members 25; the ends of the arms of the brackets 11 being secured as near the ends of the tubes of the conveyer sections as possible to provide a maximum space for the blades or conveyer portions of the conveyer screws. The conveyer portions of the conveyer screws near the open ends of the tubes are cut out at their hub portions, as indicated by 10 and 24" in Fig. 2, to clear the journal portions of the brackets 11 and to permit the outer portions of the conveyer screws to extend as far as possible toward the end of the tubes. Said cut out portions of the conveyer screws are preferably reinforced at their back sides by reinforcing members 27, as shown in Figs. 2 and 3.

The several sections of the sectional conveyer may be supported from below on suitable structures or suspended from above by means of cables 28, shown in Fig. 1.

When desiring to flush the conveyer for cleaning the same, the lever 17 is shifted to the dotted line position, which connects the gears 13 and 15, permitting the conveyer screws to be rotated at greater speeds.

It will be here noted that although my mixer and conveyer is particularly adapted for conveying concrete and simultaneously mixing the same, the same may be adapted for conveying many other classes of materials, and though I have shown and described a particular construction, combination and arran ement of parts and portions, I do not wis to be limited to this particular construction, combination and arrangement, but desire to include in the scope of my invention, the construction, combination and arrangement substantially as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a means of the class described, a pair of conveyer casings adapted to be connected at various angles at one of their ends, inwardly offset spider brackets mounted within and at the adjacent ends of said casings, conveyer screws revolubly mounted at one of their ends in said brackets, and universal joint means connecting the adjacent ends of said conveyer screws between the offset portions of said brackets.

2. In a means of the class described, a pair of conveyer casings adapted to be connected HIH at various angles at one of their ends, inwardly ofiset spider brackets mounted within and at the adj acent' ends of said casings, conveyer screws revolubly mounted at one of their ends in said brackets, and universal joint means connectin the adjacent ends of said conveyer screws etween the ofiset portions of said brackets, the adjacent ends of said conveyer screws extending outwardly beyond the inwardly ofi'set portions of said brackets.

' 3. In a means of the clam described, a conveyer casing having an open ended cylindrical portion, another 0 en ended cylindrical conveyer casing slightfy funneled at one end, said funneled portion positioned over the cylindrical end portion of said first mentioned casing, means for rigidly securing said conveyer casings together at various angles, conveyer screws revolubly mounted in said casings, and flexible means connecting said .conveyer screws.

4. In a means of the class described, a conveyer casing having an open ended cylindrical portion, another open ended cylindrical conveyer casing slightly funneled at one end, said funneled portion ositioned. over the cylindrical end portion oi? said first mentioned casing, means for rigidly securing said conveyer casings together at various angles, conveyer screws revolubly mounted in said casing, and universal oint means connecting the adjacent ends of said conveyer screws.

In testimon whereof, I have hereunto set my hand at arlsbad, California, this 23rd day of April, 1926.

BENJAMIN H. PELTOH.

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