US1167402A - Concrete-mixer. - Google Patents

Description

C. F. HETHERINGTON.

CONCRETE MIXER.

APPLICATION FILED FEB. I5. 191s.

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@TED SITE@ PATENT @FFIQEQ CARL F. HETHER-INGTON, OF INDIANAPOLIS, INDIANA.

CONCRETE-MIXER.

Application filed February 15, 1915.

T 0 all 'whom it may concern:

Be it known that I, CARL F. HETHERING* TON, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Concrete-Mixer, of which the following is a specication.

My invention relates to concrete mixers, and especially to the delivery mechanism therefor.

Considerable diliiculty has been experienced with the delivery mechanism of concrete mixers, that the material may be withdrawn from the mixer as required without having the withdrawing or delivery mechanism interfere with the operation of the mixer or be interfered with thereby.

It is the object of my present invention to overcome this trouble, and at the same time to provide a delivery mechanism by which when desired one or more ingredients, such as the hot asphalt which is used in making bituminous concrete, may be fed into the mixer, and the mixture may be thrown backa ward along the mixer when it reaches the delivery end thereof but is not to be withdrawn.

In carrying out my invention, I provide a rotatable mixing drum, of any usual type, and project approximately axially into one end thereof a delivery chute which is supported by a cantaliver bearing structure entirely outside of the drum so that the chute may be turned about its axis to bring its receiving mouth upward or downward as required and its delivery mouth downward or upward to correspond, provide a conveyer in such delivery chute for feeding material in either direction along it, either for conveying the mixture out of the mixer or for conveying asphalt into the mixer, and make the wall of that part of the delivery chute which projects into the mixer sloping so that the receiving end of said delivery chute acts to thro-w the material backward along the drum for further mixing when the receiving mouth of the chute is downward and to carry it to the eonveyer when such receiving mouth is upward.

rIhe accompanying drawing illustrates my invention.

The single figure of this drawing is a vertical longitudinal section through a hot concrete mixer and discharge mechanism embodying my invention, part of the mixing Specicaton of Letters Patent.

Patented l? an. 11, 1316.

Serial No. 8,178.

drum and its driving mechanism being in elevation.

The frame 10 of the machine may be mounted on suitable wheels 11, and in it is supported a mixing drum 12 of any suitable type, conveniently arranged to be rotated about a horizontal axis and being supported on carrying rollers 13 which cooperate with tracks 14- on the drum. @ne end or both ends of the drum are provided with gear teeth 15 which mesh with a pinion 1G on a driving shaft l?, by which the drum is rotated about its horizontal axis. A charging chute 19 projects slantingly into the drum 12 from one'end thereof, for conveying the materials to be mixed into the drum.

The construction so far described is a usual one.

rl`he wall l2 of the drum 12 is provided with an axial opening 20, through which proyects an axial delivery chute 21. At its end within the drum 12 this delivery chute is provided with a receiving mouth which is uppermost when the delivery chute is in delivering position and with a sloping end wall 23 which when such mouth 22 is uppermost carries the material received thereoy to the body of such chute. At its outer end the delivery chute is provided with a delivery mouth 25 which is diametrically opposite the receiving mouth 22 so that it is downward when such receiving mouth is upward, though the two mouths are longitudinally separated so that the delivery mouth is outside of the drum and the re ceiving mouth within it.

The delivery chute is mounted for rotation about the axis of the drum to bring the receiving mouth 22 either upward or downward (such mouth being shown downward in dotted lines), the delivery mouth correspondingly being brought to the lower and upper sides of the chute respectively. lWhen the receiving mouth 22 of the delivery chute is downward, the wall 23 is in the position shown in dotted lines and acts to throw backward along the drum 12 the material carried to the delivery end of such drum by the flights 26 and raised and dropped upon the inwardly projecting end of the delivery chute by the lifting blades 27 with which the interior of the drum is provided, thus producing a further mixing of the material within the drum when the delivery chute is not in position for delivery. The

delivery chute is in part supported for this rotation by inter-engaging slide rings 27 and 23 fixed on the chute 21 and on the end members 10 of the frame 10 respectively, the ring 28 being provided with a latch 29 for enga ging with notches 30 in the ring 27 to hold the chute in either one of its two positions. The outer end oi the chute 21 is provided with a closing plate 31 which is provided with a long bearing 32 for a hollow shaft or sleeve 33 which extends axially along the chute 21 and projects inwardly beyond it, the outer end of this hollow7 shaft or sleeve iitting over and being iixed to a shaft 34 which is supported in a bearing 35 carried by a sub-trame 36 depending from the projecting upper bars 10 of the frame 10. The shaft 34 is provided with a sprocket wheel 37 on the opposite side of the bearing 35 from the sleeve 33, the sleeve 33 and sprocket wheel 37 bearing against the ends of the bearing to position the shaft- 33 and associated parts axially. The projecting upper bars 10, the subframe 3G, the bearing 35, the shaft 34, the hollow7 shaft or sleeve 33, and the bearing 32 cooperate with the rings 27 and 23 to furnish the rotatable support for the delivery chute 21, providing a cantaliver arrangement which is totally outside of the drum 12 but which furnishes a iirm support for the chute while at the same time allowing it to be rotated about its axis.

As considerable power is sometimes required for rotating the delivery chute 21, 1 preferably provide power means for obtaining this rotation. To this end, the upper bars 10 of the traine lO support bearings 40 for a countershaft 41, on which is fixed a pinion 42 which meshes with one set of the gear teeth 15. r1`he countershaft 41 has loosely mounted thereon a sprocket pinion 44 which may be clutched to the countershaft by a sliding clutch member 45 operable by a lever 46, the sprocket pinion 44 being connected by a chain 47 to a sprocket wheel 48 fixed on the end plate 31 of the delivery chute 21. By throwing in the clutch 45, the delivery chute 21 may be turned to bring its receiving mouth either upward or downward and its delivery mouth either downward or upward.

That part of the hollow shaft or sleeve 33 which is within the delivery chute 21 is provided with a suitable conveyer, such as a worm conveyer 50, for conveying material along such chute. A hand wheel 51 is mounted on the hollow shaft or sleeve 33 for operating this worm by hand, so that when the mouth 25 is upward and the mouth 22 downward the desired ingredient or ingredients, such as hot liquid asphalt, may be poured into the mouth 25 and fed into the drum 12 through the delivery chute 2l and mouth 22 of such chute by proper rotation of the worin by the hand wheel 51. The worin 50 may also be operated by power, the pinion 37 being connected by a chain 55 to a sprocket wheel 5G loosely mounted on the countershaft 41 but connectible thereto by a clutch member 57 operable by a lever 58. TWhen the clutch 57 is thrown in, the worm 50 is operated to convey materials along' the delivery chute toward the delivery mouth 25, and so acts when such delivery mouth 25 is downward and the receiving mouth 22 of the chute is upward.

I claim as my invention:

1. In combination, a mixing drum, a delivery chute projecting into the end of said drum, a cantaliv-er support for said delivery chute located entirely outside of said drum and in which said delivery chute is rotatably mounted to swing about an axis which extends along the passageway of the chute, said delivery chute having a receiving mouth within the drum which may be brought either to the upper or lower side of the chute by such rotation and with a sloping end wall within the drum which when such receiving mouth is downward throws material backward along the drum and with a delivery mouth outside of said drum and a rotary conveyer mounted in said chute and rotated on the axis about which the chute is rotatable.

2. ln combination, a mixing drum, adelivery chute projecting into the end of said drum, a cantaliver support for said delivery chute located entirely outside of said drum and in which said delivery chute is mounted to swing about an axis which extends along the passageway of the chute, and a. rotary conveyer mounted in said chute and rotatable on the axis about which the chute is rotatable.

3. ln combination, a mixing drum, a delivery chute projecting into the end of said drum, a cantaliver support for said delivery chute located entirely outside of said drum and in which said delivery chute is rotatably mounted to swing about an axis which extends along the passageway of the chute, said delivery chute having a receiving mouth tithin the drum which may be brought either to the upper or lower side of the chute by suoli rotation and with a delivery mouth outside of said drum and a rotary conveyer' mounted in said chute and rotated on the axis about which the chute is rotatable. Y

4. In combination, a rotatable mixing drum, a delivery chut-e projecting into the end of said drum, a cantaliver support for said delivery chute located entirely outside of said drum and in which said delivery chute is rotatably mounted to swing about an axis which extends along the passage- Way of the chute, said delivery chute having a receiving mouth within the drum which may be brought either to the upper or lower side of the chute by such rotation and with a slo-ping end wall within the drum which when such receiving mouth is downward throws material backward along the drum and with a delivery mouth outside of said drum, and common means for rotating said chute and said' drum at will.

5. In combination, la rotatable mixing drum, a delivery chute projecting into the end of said drum, a cantaliver support for said delivery chute located entirely outside of said drum and in which said delivery chute is rotatably mounted to swing about an axis which extends along the passageway of the chute, said delivery chute having a receiving mouth within the drum which may be brought either to the upper or lower side of the chute by such rotation and with a delivery mouth outside of said drum, and means for drivingly connecting said chute to the drum at will to produce rotation of said chute about its axis.

G. In combination, a mixing drum, a delivery chute projecting into the end of Said drum, a cantaliver support for said delivery chute located entirely outside of said drum and in which said chute is mounted to swing about an axis which extends along the passageway of the chute, and a rotary conveyer within said chute, said rotary conveyer being rotatable in either direction to convey material in either direction along said chute.

7. In combination, a rotatable mixing drum, a delivery chute projecting into the end of said drum, a cantaliver support for said delivery chute located entirely outside of said drum and in which said chute is mounted to swing about an axis which extends along the passageway of the chute, a rotary conveyer within said chute, said rotary conveyer b-eing rotatable in either direction to convey material in either direction along said chute, and means for rotating said conveyer at will in one direction from the rotation of the drum.

8. In combination, a mixing drum, a delivery chute projecting into the end of said drum, a cantaliver support for said delivery chute located entirely outside of said drum and in which said delivery chute is rotatably mounted to swing about an axis which extends along the passageway of the chute, said delivery chute having a receiving mouth within the drum which may be brought either to the upper or lower side of the chute by such rotation and with a delivery mouth outside of said drum, and latching means for holding said chute with its receiving mouth either upward or downward.

9. In combination, a frame, a mixing drum mounted therein, a delivery chute projecting into said drum from one end thereof, supporting means carried by said frame and located between the ends of said chute outside of said drum for furnishing part of the support for said chute, said supporting means permitting the chute to be rotated and said chute being provided at its inner end with a receiving mouth which is brought either upward or downward by such rotation, and the passageway of said chute extending substantially along its axis of rotation, a shaft extending axially of said chute, bearings for said shaft carried by said frame beyond the outer end of said chute and by said chute, whereby a cantaliver supporting structure for said chute is provided, and a conveyer on said shaft within said chute for conveying material along said chute.

l0. In combination, a frame, a mixing drum mounted therein, a delivery chute proecting into said drum from one end thereof, supporting means carried by said frame and located between the ends of said chute outside of said drum for furnishing part of the sul port for said chute, a shaft extending axially of said chute, the passageway of said chute extending substantially along the axis of said shaft, bearings for said shaft carried by said frame beyond the outer end of said chute and by said chute, whereby a cantaliver supporting structure for said chute is provided, and a conveyerl on said shaft within said chute for conveying material along said chute.

ll. In combination, a frame, a mixing drum mounted therein, a delivery chute proj ecting into said drum from one end thereof, supporting means carried by said frame and located between the ends of said chute outside of said drum for furnishing part of the support for said chute, said supporting means permitting the chute to be rotated and said chute being provided at its inner end with a receiving mouth which is brought either upward or downward by such rotation, a shaft extending axially of said chute, bearings for said shaft carried by said frame beyond the outer end of said chute and by said chute, whereby a cantaliver supporting structure for said chute is provided.

l2. In combination, a frame, a mixing drum mounted therein, a delivery chute projecting into said drum from one end thereof, supporting means carried by said frame and located between the ends of said chute outside of said drum for furnishing part of the support for said chute, a shaft extending axially of said chute, bearings for said shaft carried by said frame beyond the outer end of said chute and by said chute, whereby a cantaliver supporting structure for said chute is provided.

13. In combination, a rotatable mixing drum, a delivery chute projecting into the end of said drum, a cantaliver support for said delivery chute located entirely outside of said drum and in which said delivery chute is mounted to swing about an axis which extends along the passageway or' the chute, and means for drivingly connecting said chute at will to the drum to produce rotation of the chute.

14. In combination, a frame, a mixing drum mounted therein, a delivery chute projecting into said drum from one end thereof, supporting means carried by said frame and located between the ends of said chute outside of said drum for furnishing part of the support for said chute, said supporting means permitting the chute to be rotated and said chute being provided at its inner end with a receiving mouth which is brought either upward or downward by such rotation, and the passageway of said chute extending substantially along its axis ot rotation, a shaft extending axially of said chute, bearings for said shaft carried by said frame beyond the outer end of said chute and by said chute, whereby a cantaliver supporting structure for Said chute is provided, a conveyer on said shaft within said chute for conveying material along said chute, and common means located at one end of the drum for selectively operating either said chute or said conveyor.

l5. In combination, a mixing drum, a

delivery chute projecting into the end of the drum and mounted to rotate on an axis along which the passageway of the chute extends, a conveyer mounted in said chute and rotatable on the same axis, said chute being provided with a lateral opening within the drum and a substantially ldiametrically opposite lateral opening outside of the drum, and common means Jfor selectively rotating either said chute or said conveyer.

16. In combination, a rotatable mixing drum, a delivery chute projecting into the end of the drum and mounted to rotate on an axis along which thepassageway of the chute extends, a conveyer mounted in said chute and rotatable on the same axis, said chute being provided with a lateral opening within the drum and a substantially diametrically opposite lateral opening outside the drum, and means for selectively drivingly connecting either said chute or said conveyer to the drum to produce rotation of said chute or conveyer.

In witness whereof, I have hereunto set my hand at Indianapolis, Indiana, this second day of February, A. D. one thousand nine hundred and fifteen.

CARL F. HETHERINGTON.

Vitnesses l JosEPHiNE GASPER, LOUISE BENNETT.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. G.

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