US1329506A - Frederick h - Google Patents

Description

F.. H. C-UMMER. ASPHALT MIXING APPARATUS.-

' APPLICATION FILED DE C. I2. 1944. r 1,329,506.

Patented Feb 3, 1920.

3 SHEETS-SHEET 1 Ill F. H. (SUMMER. ASPHALT MIXING APPARATUS.- APPLICATION FILED DEC. I2. 1914.

1,329,506, V Patent ed Feb. 3,1920.

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F. H. CUMMER.

ASPHALT MIXING APPARATUS.

APPLICATION FILED DEC. 12. l9l4.

Patented Feb. 3,1920.

3 SHEETSSHEET 3 illNITED STATES PATENT OFFICE.

FREDERICK H. .CUMMER, OF CLEVELAND, OHIO, ASSIGNOR TO THE F. CUMMER & SON COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

ASPHALT-MIXING APPARATUS.

Specification of Letters Patent.

Patented Feb. 3, 1920.

Application filed December 12, 1914. Serial No. 876,958.

To all whom it may concern:

Be it known that I, FREDERICK H. Qumnnn, a citizen of the United States, reslding at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Asphalt Mixing Apparatus, of which the following is a specification.

This invention relates generally to mix ing apparatus and particularly to that class of such devices utilized in treating and mix ing" materials in the production of asphalt for pavements.

More specifically the invention relates to a road apparatus for preparing and mixing materials in the production of asphalt for pavements, and it comprises abody or frame mounted on lOttd'WllGGlS, a heating chamber supported upon the frame, a heater or furnace below said chamber, a rotatable drier cylinder within said chamber and having hooded hot air inlets, means for feeding sand or gravel or other material to the receiving end of said cylinder, means for exhausting air from said cylinder, means for receiving the materials from said cylinder, separating mechanism, suitable bins or troughs for receiving said materials, means for directing the materials to any of said devices, means for elevating the materials from the drier receiving bin to the distributing means, means for weighing the materials as they pass from the bins, a suitable batch mixer for receiving the materials, together with driving means arranged to be operated from a single driving element, all of said parts be ing carried upon one bed and co-acting to make a self-contained road asphalt mixing plant.

The invention may be further briefly summarized as consisting in the construction and combination of parts hereinafter set forth in the following description, drawings and claims.

Referring to the drawings, Figure 1 is a side elevation of the apparatus; Fig. 2 is a top planyiew; Fig. 3 is a sectional view partly in elevation showing the heating chamber with the drier cylinder; Fig. 4 is a rear end elevation; Fig. 5 is a horizontal sectional view through the bins; Fig. 6 is a vertical section upon the line 6-6 of Fig. 5

and Fig. 7 is a sectional view taken nearthe bottom of the bins on the line 77 of Fig. 5.

In carrying out the invention any preferred form and construction of parts may be employed so long as they possess the necessary characteristics, but I have shown one arrangement which is in accordance with the'invention, and in such embodiment 1 represents a suitable frame supported upon front road wheels 2 at the forward end and rear road wheels 3 at the rearend,the connection of these wheels being of any preferred arrangement, except that the rear wheels are arranged at a distance from the rear so as to provide an overhanging frame portion. Mounted upon this frame is a heating chamber casing 4 having a fire box 5 at the bottom which is adapted to be supplied with fuel through the fire door 6. This fire box 5 extends below the frame and is adapted to furnish heat to the chamber formed in the heating chamber casing 4:. The heating chamber casing is provided near the rear and at the bottom with a discharge hopper portion 7 ,shown in dotted lines in Fig. 1, and in full lines in Fig. 3, and for a purpose which will later appear. Extending into this casing 4 is a drier drum 8 su-pported at the rear end by a suitable Web 9 secured within the cylinder and arranged upon a short shaft portion 10 extending into a suitable journal box 11 supported upon the frame 1. The forward end of the cylinder or the end projecting beyond the casing 4 is supported by a steel tire 12 engaging suitable rollers 13 carried by the frame. The periphery of the cylinder 8 may be provided with hot air inlet openings 14 arranged spirally about the periphery of said cylinder and each communicating with an inwardly projecting tubular member 15 having an elbow 16, the opening of which extends toward the inlet of the cylinder or toward the left end, as shown in Fig. 3. The discharge from' each. of the openings of the elbow 16 is baflied by a hood 17 supported by the elbow in any suitable manner, so that heat may pass from thesehooded members into the cylinder, and sand and gravel may be prevented from entering the openings of the elbows. Theextreme left or inlet end of the cylinder is provided with a ring gear 18 having teeth 19 and an inwardly extending flange'20 counter-bored at 21. The gear is also provided with a recess 22 for receiving a retaining ring 23 held in place by suitable screws 24. Between the ring 23 and the inwardly extending flange 20 is a ring 25 forming a part of an exhaust housing 26.

in open communication with the cylinder. This exhaust housing is connected to a blower 27 of any preferred type, the arran ement being such that the operation of the lower causes air to be drawn from the housing and from the cylinder. Extending into the housing is a supply chute 28 adapted to receive materials from a supply hopper 29 adapted to be furnished with materialsgby a suitable elevator 30, preferably of the bucket type, or of any preferred structure. Meshing with the ring gear 19 is a drivin inion 31 mounted upon a shaft 32 p'rovi with a pinion 33 meshing with a pinion 34 upon the main operating shaft 35, supported- 1n bearings 36, 37 and 38 on the frame and extending throughout the-length of the frame on the outside of the casing 4. This driving shaft carries on its forward end a bevehgear 39 meshing with a bevel pinion 4011 n a transverse driving shaft 41 mounted 1n bearings on the forward end of the frameand provided with a driving pulley 42 adapted to be driven in any suitable manner. Secured to the opposite end of the shaft 41 is another pulley 43 adapted to drive a belt 44 leading to a pulley 45 on the shaft of the rotor of the blower.

Mounted on the frame and arranged at the rear of the casing 4 is the elevator casing. 46 rectangular in form and having its lower end extending down below and receiving a discharge from the heated sand hopper 7. Rotatably mounted in the lower end of this casing is a suitable shaft 47 provided with a sprocket wheel 48 carr ing an elevator chain. This elevator casing extends to a point above the casing 4 and is there hinged to theupper elevator casing 49 adapted to swing from vertical to horizontal position so as to allow head room above the machine when traveling under bridges and the like. In this upper portion 49 of the elevator casing there is a shaft 50 provided within the casing with a sprocket wheel 51. Upon the sprocket wheel 51 is an elevator chain provided with buckets of any preferred type,

# these buckets being adapted to elevate the sand or other material from the bottom to a int where it will enter the mechanism to described. The shaft 50 is also provided with a sprocket wheel 52 connected by a chain 53, indicated by dotted lines, with a sprocket wheel 54 mounted upon the shaft 35. By means of this mechanism, the elevator chain is driven in the proper direction. The buckets" on the chain 53v are adapted to empty into a chute 55 at the rear, and this chute is connected to a pair of chutes 56 and 57 these chutes being formed with a common wall which projects to a point midway between the two walls of the chute 55 so that a shutter or door 58 may be pivoted at the end of the partition or wall and may be thrown from one side to the other of the chute 55 so as to direct the materials either in the chute 56 or 57 as the case may be. The chute 56 communicates with the inlet end 59 of a cylindrical screen member comprising a shaft 60 supported in suitable bearings 61 and 62 in the ends of the housing 63. This shaft 60 is provided with suitable spiders 64 which support two cylindrical wire mesh sections 65 and 66, the former being made of small mesh wire, and the latter being made of coarse mesh. The end of the screen cylinder empties into a tailing chute 67 provided with a discharge 68. The chute 57, the fine mesh screening portion and the coarse mesh screening portion all discharge into a suitable recelving hopper, and this hopper comprises a casing 69. having a transverse partition 70 coincident with the division between the fine and coarse mesh screening portions, and separating the reoeiving hopper into two compartments 71 and 72, the compartment 72 being common to the fine mesh screening portion of the screen and to the chute 57. The lower end of the hopper chamber 71 leads into a discharge chute 73 while the hopper chamber 72 communicates with a discharge chute 74 arranged in transverse alinement with the chute 73. Extending through both of these chutes is a shaft 75 provided with a valve member 76 for closing the chute 73. At the end of this shaft is an operating handle 77 for operating the valve. Surrounding the shaft 75 is a sleeve 78 extending throu h the hopper 74 and carrying a valve me r 79 for closing the chute 74. This sleeve is provided with an operating handle 80. Both of the chutes 73 and 74 empty into a mixer hopper 81 supported beneath them, and this opper empties into a batch mixer 82 of any preferred type. The batch mixer is operated by a gear 83 mounted loosely upon the shaft 35 and provided with a clutch member 84 adapted to be engaged by a clutch member 85 loosely splined to the shaft 35. The shaft 35 is supported beyond. the clutch member 85 by a suitable bearing 86. Secured to the side of the receiving hopper is a rail 87 adapted to receive a trolley 88 upon which is mounted a suitable scale comprising a balance 89', and a yoke 90 receiving the bucket 91.

I prefer to provide the heating chamber casing with a cover consisting of a plurality of transverse cast members each comprising a main body portion 92 of the width of the chamber and extending onto the upper ed e of each of the side walls. The main b0 y portion of each of these members is provided with a flange 93 spaced from the lower face of the member and adapted to lapover onto a flange 94 of the corresponding member. This lap-joint construction is carried out throughout the top of the chamber casing, and it serves as a means for covering the same and yet --permitting free access thereto by simply raising one or more of the members. .i The members are provided with suitable ribs 95 for strengthening them.

Assuming that firehas been started in the fire box, and that material is ready for feeding to the machine by the conveyer and further assuming that power is transmitted to the driving pulley 42, it Will be seen that as the sand is fed into the drier drum it will gradually move by reason of the inclination of this drum or cylinder to the discharge end, from whenceit will pass into the hot sand receiving hopper 7, hot air being drawn through it by the blower 27. In the meantime, however, the buckets on the elevating chain of the hot sand elevator have elevated the sand to the top and caused it to discharge either directly into the chamber 72 or into the fine mesh screen portion of the screen cylinder. When passing into this cylinder the finer particles are sifted into the chamber 72 and some of the coarser particles into the chamber 75, the tailings being discharged from the end of the screening cylinder into the tailing chute 67 from whence they pass out of the machine. When a sufficient quantity of material has been collected in the chambers 71 and 7 2 the proper quantities of these materials are discharged into the hop per 81 from whence they pass into the batch mixer. To this material in the batch mixer is added the proper quantity of asphalt or other material, Which is Weighed in the bucket 91 carried by the scale.

Having described my claim 1. In a road plant for mixing asphalt, a rotatable drier cylinder, means for supplying heat thereto, a receiving hopper for receiving materials from said drum, a screen, a receiving bin, a chute leading to the screen, a chute leading to the bin, a common supply chute in connection With both of said chutes, means for controlling the passage of materials to either the screen chute or the bin chute, and means for feeding the materials from the receiving hopper to the common chute.

2. In a road plant for mixing asphalt, a rotatable drier cylinder, means for supplying heat thereto, a receiving hopper for receiving materials from said drum, a screen, a receiving bin, a chute leading to the screen, a chute leading to the bin, a common supply chute for both of said chutes, a valve for controlling the passage of materials to either the screen chute or the bin chute, and means invention, I

for feeding the materials from the receiving hopper to the common chute.

3. In a road plant for mixing asphalt, frame, supporting WllGGlSthGlGfOl, a casing mounted upon said frame and forming a heating chamber, afire box for supplying heat to said casing, a rotatable :drier cylinder With'hooded air inlets through its Wall and arranged in said heating chamber, means for supplylng materials to said drier cylinder, a batch mlxer, and a bin structure for receiving materials before being sup-' of materials to either one or the other of said chutes, means for conveying the materials from the drier to the main supply chute, and means for operating the several parts. at. In a road plant for mixing asphalt, frame, supporting Wheels therefor, a casing mounted-upon said frame and forming a heating chamber, a fire box for supplying heat to said casing, a rotatable drier cylinder arranged in said heating chamber, means for supplying materials to said drier cylinder, a batch mixer, and a bin structure for receiving materials before being supplied to the mixer and comprising a bin housing, a screen arranged therein, a tailing chute communicating With the screen for conveying away the tailings, a main supply for said bin structure, a screen chute communicating with the main supply chute, a valve for controlling the fioW of materials to either one or the other of said chutes, means for conveying the materials from the drier to the main supply chute, and means for operating the several parts. 7 V

5. In a road plant for mixing asphalt, a frame, supporting Wheels therefor, a casing mounted upon said frame and forming a heating chamber, a fire box for supplying heat to said casing, a drier arranged in said heating chamber, means for supplyingmaterials to said drier, a batch mixer, and a bin structure for receiving materials before be- .ing supplied to the mixer and comprising a bin housing and a screening device arranged Within said housing and having a fine mesh portion and a coarse mesh portion, a partition in said housing extending from the division point of the coarse and fine mesh portions of said screen, separate discharge chutes for said two bin portions formed by the partition, means for discharging materials into the screen and directly into the bin, means for controlling such discharge, means for conveying the materials from the drier bin Supplying means, and meens for operating the severaibparts.

6. Mix'mgepparatus, eomprising an outer casing, a mtatabledrum supported at one end of said and spaeed; fmm the: walls thereof and; yrevrded therein with .a series of internal air'mlet pipes communicating with :the space between said drum. and casin and openmg toward the opposite end 0 the drum, and hoodsbeflling the inner ends of 10 eaid pipes and reversing direction of air flow therefrom.

In testimony whereof my signature in'presence oftveowitnesses.

FREDERICK 1 H. ,CUMM-ER. -Witneeses:

G. O.-EARQUHARSQN, (1-H. SHGTZBARGER.

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