US773375A - Concrete-mixing machine. - Google Patents

Description

No. 773,375; a PATENTBD 0012525, 1904. R. H. L. COOPER. CONORETB'MIXING MACHINE.

- APPLICATION FILED FEB. 4, 1904. NO MODEL BBHETITB-BHEET 1.

W V @Q/MA-M .8

No. 773,375. I PATENTED OCT. 25, 1904.

, R. H. L. COOPER.

CONCRETE MIXING MACHINE.

APPLICATION FILED FER-4, 1904.

N0 MODEL. 3 SHEETS-SHEET 2.

No. 773,375. PATENTED OCT. 25, 1904.

R.IH. L. COOPER. CONCRETE MIXING MACHINE.

7 APPLICATION FILED IEB. 4, 1904. NO MODEL. 3 SHEETS-SHEET 3.

UNiTEn STATES Patented October 25, 1904.

ATENT- FFIICE.

CONCRETE-MIXING MACHINE.

SPECIFICATION forming part of Letters Patent No. 773,375, dated October 25, 1904.

Application filed February 4, 1904. Serial No. 191,919. (No model.)

To all whom, 22!; NMLZ/ concern:

Be it known that I, RICHARD H. L. COOPER, a citizen of the United States, residing in St. Louis, State of Missouri, have invented certain new and useful Improvements in Ooncrete-Mixing Machines, of which the following is a specification containing a full, clear,

and exact description, reference being had to I the accompanying drawings, forming a part hereof.

My invention relates to concrete-mixing machines, my object being to construct a machine in which concrete and similar material may be mixed by centripetal force and discharged by centrifugal force; and my improved concrete-mixing machine comprises a suitable frame, heads rotatably mounted in said frame, a series of involute mixer-blades connecting said heads. there being feed-openings through said heads, hoppers discharging to said feed-openings, means of regulating the flow from said hoppers, means of rotating said heads in one direction to mix the concrete or the like by gravity, and means of rotating said heads in the opposite direction to discharge the concrete by centrifugal force.

In the drawings, Figure 1 is a sectional ele vation substantially on the line 1 l of Fig. 2 and looking in the direction indicated by the arrow. Fig. 2 is a side elevation as seen looking in the direction indicated by the arrow 2 in Fig. 1. Fig. 3 is a cross-sectional detail through the mixer-blades and taken on the line 3 3 of Fig. 4. Fig. 4 is a longitudinal section of the mixer heads and blades and taken on the line 4 4 of Fig. 3. Fig. 5 is a view analogous to Fig. 3 and showing the modified construction, parts being broken away to economize space. Fig. 6 is a view looking in the direction indicated by the arrow 6 in Fig. 5, parts being shown in section to better illustrate the construction.

Referring to the drawings in detail, the posts 10 are mounted vertically upon the sills 11, the upper ends of said posts being connected by braces 12, and a floor 13 rests on said braces. Bearing-rollers 14 and 15 are mounted upon the sills l1, and similar bearing-rollers 16 and 17 are mounted upon the posts 10.

The mixer-heads comprise the vertical circular plates 18 and 19, the funnel- shaped walls 20 and 21, extending inwardly from said plates and having the flanges 22 and 23, re-

spectively, projecting outwardly from their inner edges parallel With the plates 19, and the ring- shaped plates 24 and 25 are attached to said flanges 22 and 23, respectively, there being feed- openings 26 and 27 through the plates 18 and 19 and enlarged feed- openings 28 and 29 through the plates 24 and 25, respectively. The series of involute mixerblades 30 connect the inner faces of the plates 24 and 25, thereby connecting said mixerblades, thus forming the involute concrete channels 31, leadingfrom the peripheries of the plates 24 and 25 to points near the openings 28 and 29. The obstruction-plates 32 are fastened to the inner edges of the blades 30 to obstruct the channels 31, so as to break up the concrete as it passes through said channels. Bearing- surfaces 33 and 34 are formed upon the peripheries of the plates 18 and 19, there being flanges 35 upon each side of the bearing-surface 33 and flanges 36 upon each side of the bearing-surface 34, said bearingsurfaces resting upon the rollers 14, 15, 16, and 17 and said rollers operating between said flanges.

Tooth-segments are attached to the funnelshaped Wall 21 to form a sprocket-wheel 37, and a sprocket-chain 38 connects the sprocketwheel 37 to the driving-sprocket 39, mounted upon the shaft 40, and the belt 41 connects the pulley 42 upon said shaft to the source of power, said source of power being preferably a counter-shaft carrying pulleys and clutches,whereby the'motion may be reversed at Will, so as to operate the mixer first in one direction and then in the other.

A hopper 43 is mounted in position to discharge into the feed-opening 27 said hopper being held in position by braces 44, attached to one of the sills 11, the discharging end of said hopper forming a close joint with the plate 19, and rollers 45, carried by said hopper, engage said plate 19 to prevent friction between the hopper and the plate. A valveframe 46 is mounted at the inner side of the hopper, and a valve 47, controlled by the handle 18, slides from the frame 4:6 to regulate the discharge-opening 19 of the hopper, thus regulating the flow of concrete from the hopper to the mixer.

The hopper may be filled through the opening 50 in the floor 13, the handle 18 operated to raise the valve 47, and the concrete will pass through the opening 27 and through the opening 29 to the mixer-blades 30, and when said mixer-blades are operated in the direction indicated by the arrow 51 in Fig. 3 the concrete Will pass through the channels 31 by gravity and strike the obstruction-plates 32 and be thrown to the center of the mixer,and after said concrete has been sufiiciently agitated the direction of rotation is reversed, as indicated by the arrow 52 in Fig. 3, and then the concrete will pass outwardly through the channels 31 and drop upon the floor or ground or into any suitable receptacle under the mixer, the speed of discharge depending, of course, upon the speed of rotation.

.ln the modification shown in Figs. 5 and 6 the plates 53 close the outer ends of the chan nels 31, and inclined guide-plates 5 1 are inserted to lead the concrete outwardly through the openings 55 in either of the ring- shaped plates 24 or 25, thus discharging the concrete to one side of the mixer instead of discharging from the periphery.

If desired, a hopper may be mounted in operative relation to each of the plates 18 and 19, and the machine may thus be fed from both sides, and, if desired, a different material may be fed from each hopper, said material being mixed in the machine.

I claim-- 1. In a concrete-mixing machine: suitable sills; posts mounted vertically upon the sills in the form of a square; braces connecting the upper ends of the posts; a floor resting upon said braces and having a feed-opening; bearing-rollers mounted upon the sills and upon the posts, so as to support the ends of the mixer; mixer-heads comprising vertical circular plates 18 and 19, the funnel- shaped walls 20 and 21, the flanges 22 and 23 projecting outwardly from the inner edges of the funnel- shaped walls 20 and 21, and the ringshaped plates 24 and 25 attached to the flanges 22 and 23 respectively, there being feed-openings through the plates 18 and 19, and enlarged feed-openings through the plates 2 1 and 25; the series of involute mixer-blades connecting the inner faces of the plates 21 and 25; there being bearing- surfaces 33 and 34 upon the peripheries of the plates 18 and 19 to engage said rollers; and flanges 35 and 36 upon the opposite sides of said bearingsurfaces to hold the mixer in place upon the rollers; substantially as specified.

2. In a concrete-mixing machine: rollers arranged to form bearings; vertical circular plates 18 and 19; the bearing-surfaces 33 and 3 1 upon the peripheries of said plates and engaging said rollers; flanges holding said bearing-surfaces in position upon said rollers; the funnehshaped walls 20 and 21 extending inwardly from the plates 18 and 19; the ring-shaped plates 2a and 25 attached to the inner ends of said funnel, there being feedopenings through said plates 18 and 19, and larger feed-openings through the plates 24 and 25; and the series of involute mixerblades 30 connecting the plates 24 and 25; substantially as specified.

3. In a concrete-mixing machine: suitable heads; a series of involute mixer-blades connecting the heads; means of mounting and rotating the heads, there being a feed-opening through one of said heads; the hopper 43 mounted in position to discharge into said feed-opening; and rollers 45 carried by said hopper to engage the head of the rotating mixer; substantially as specified.

In testimony w hereof l have signed my name to this specification in presence of two subscribing witnesses.

RICHARD H. L. COOPER.

\Vitnesses:

ALFRED EIOKS, M. G. IRION.

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