Dec. 3, 1946. 2,412,121 J. R; BRADSHAW BULK CEMENT CONVEYANCE Filed July 30, 1945 .96 ‘4 15 .76 .96 27 2.6 2727 24 24 w 73 25 w 25 21 Jz’forrg 2,412,121 Patented Dec. 3, 1946 UNITED STATES PATENT OFFICE 2,412,121 Q BULKcEnmN'rcoNvnYANca John a. Bradshaw, Duncan, 0th., animal a» ' Balliburton ' Oil Well. cementing Company, Duncan, Okla. Application-July so, 1945, Serial No. 601,191 1 10mm; (Cl- 214-88) 2 Thi- invention relates to automotive convey ances and more particularly to an arrangement for transporting Portland cement in bulk from one place to another, such as from a bulk storage conveyors, the construction being in accordance with the principles of the present invention; ' Figure 2 is a transverse ‘cross-sectional view of the container shown in Figure 1, the view being plant to the site of an oil well. taken on the line 2-4 thereof; - , Until a few years ago, oil wells were commonly cemented by conveying Portland cement‘ to the well in sacks. At the well a number of men were I ‘ . Figure 3 is an enlarged cross-sectional view of one of the screw conveyors of Figure 2, ,with the protective means mounted thereabove; employed to open the sacks and dump the cement Figure 4 is a perspective view of one of the 'being taken to the well and fed into the mixer being taken on the line 5-5 of Figure 3. Referring to the drawing in detail, it will be seen that the frame oi an automotive trailer is illustrated at H, the trailer being provided with _ rubber tired wheels l2. Mounted upon this into a mixer where a slurry was made and 10 protective plates shown in Figure 3; and 'Figure 5 is a cross-sectional view across the pumped into the well. Recently, bulk cement ' conveyances have come into use, the cement - braces supporting theprotective means, the view by means of screw conveyors located in the lower portion of the conveyance. In many cases, oil wells are located in territory where the roads are not good or in ?elds some distance from a central bulk cement plant, or on rough ground. As a trailer is a, container l3, preferably of welded steel , construction and provided with one or more man result, Portland cement conveyed in bulk has a tendency to pack and settle. From experience 20 holes I‘ through-which the container It may be loaded with cement. The manholes may be pro it has been found that screw conveyors located vided with suitable covers l5. in the bottom of a bulk cement conveyance can As shown in the drawing, two screw conveyors not be rotated when the conveyance arrives at l6 are mounted in the bottom of the container 13. its destination because of the packing of the 25 These preferably extend longitudinally of the cement around them. trailer body and terminate in a discharge spout In accordance with the present invention it is or chute I‘! at the rear of the trailer. A gaso proposed to equip a bulk cement conveyance hav line engine l8, or the like, is employed to rotate ing one or more discharge screws in the bottom the screws It, being connected thereto through thereof with means for preventing the packing of the cement around the screws while‘the cement 30 suitable chain sprockets i9 or other driving means. ' is being transported, the protective means being As shown in Figures 2 and 3, the lower por so disposed as to permit it to be lifted to uncover tion of the container i3 is provided with bame the screws after they have started to rotate to plates or guiding means 2! which form troughs discharge the cement from the conveyance. Accordingly, it is an-object of the invention to 35 in the bottom of which thescrews it are located. In accordance with the present invention a num provide a bulk cement conveyance in which screw ber of inverted V-shaped braces 22'are riveted or conveyors are employed to discharge the cement otherwise rigidly secured to the ba?ie plates 2| at into a mixer or hopper with a minimum 01 in spaced points longitudinally along the screw con convenience and with a minimum of power re 40 veyors l6. These serve to brace the baiiie plates quired to rotate the screw conveyors. 21 and also serve to guide and support protective It is a further object of the invention to pro- , plates .23 which are placed thereon. vide means for selectively dumping portions of a As shown in Figure 1, five pairs of protective _. bulk cement conveyance so that di?‘erent kinds plates 23 are provided. When the container i3 of cement may be carried in the conveyance and 45 is being loaded with cement and while the cement discharged therefrom as desired. is being transported the plates 23 rest upon the Other objects reside in certain features of the arrangement and construction of parts, as will be apparent from the following description taken in connection with the accompanying drawing, in which: . ' Figure 1 is a vertical cross-sectional view of an automotive trailer provided with a bulk cement container, conveyor screws with an engine for driving the same and with means for preventing braces 22 in the position shown in Figure 3, and form a roof over the screw conveyors it, thus preventing the cement from packing around the 50 screw conveyors. As shown at 20 in Figure 1, a transversely ex tending partition may be provided in the con tainer l3. This divides the container into com partments so that cements of different kinds may the bull; cement from packing around the screw 55 be conveyed. For example the ‘compartment to ‘9,412,121 ' ‘ . . 3 the right of‘the partition 23 may be loaded with cement containing 8% bentonite, while the com partment to the left of the partition may be loaded with ordinary Portland cement. By rais while the/conveyance is being moved long dis tances or over rough roads, but in which the cement may readily be discharged from the con - tainer when so desired. ing the sets of plates 23 selectively, the various While only one embodiment of the invention has been shown and described herein, it is obvious that various‘changes'may be made without de parting from the spirit of the invention or the cements may be discharged into the screws l8 and chute I‘! as desired. 4 " _ When the conveyance has reached its destina tion and it is desired to discharge the container , scope of the ‘annexed claim. i3, the engine It is started and the screw con 10 I claim: ' veyors It rotated. The plates 23 are then raised " In an automotive conveyance to; cement in 1 to the position shown at the right hand side of bulk, a container having a partition therein di Figure 2, so as to uncover the screws l6 and per viding the same into compartments‘, screw con mit the cement to move downwardly. into the veyors mountedi’or rotation in the bottom oi’ said screw conveyors It. Any suitable means, ‘either 15 container forv discharging cement therefrom, mechanical or hydraulic, may be employed to baillelplates forming troughs for directing the raise the protective plates 23. In the arrange cement into said screw conveyors, angled braces ment shown, a jack is employed, the screw 24 or ’ disposed above said screw conveyors 'at spaced which is connected to the plates 23 through suit points'therealong and connected to said baii'ie able linkage 25. ' The jack includes a hand oper 20 plates, protective plates mounted in, pairs for ated nut 26 swivelledi upon a base member 21 mounted on the top 28 of the container l3. As shown in Figures 4 and 5, loose ?tting brackets 29 are secured to the'plates 23 to guide the plates over the angled braces 22. ' With the arrangement just described, it will be apparent that provision has been made for pre-v venting cement from packing around the screws ' sliding movement on said~ angled braces and adapted to form roofs over said screw conveyors, and jacks mounted on the top of said container 4017 raising said protective plates selectively'to. 25 permit cement from either of said compartments to ?ow into said screw conveyors as desired. JOHN R. BRADSHAW.