oct., a, 394e. „ G, w, MORK ' ' scRAPER ’ Filed Aug. 2, 1943l z3 2,408,806 4 Sheets-Sheet 1. 27 45 21' 30> 3a 22 ze 49 ' 25 ' 24 e5 2027.22 «ma a1 Z0 /9 2; z5 15 4 Y 29 y ‘à’ i mVENToR BY ATTORNEYS ^ Oct. 8, 1946. G. w. MoRK 2,408,806 ` SGRAPER Filed Aug. 2, 1943V A /ó 4 Sheets-Sheet 2 Y ,l 27 z H4 f5’. ¿la è zz 2@ 2m" o f n O ¿i? i5 Lili’ ¿ß ÚCÈ. 8, 1946. - Q_ w, MORK 2,408,806 SCRAPER Filed Aug. 2, 1943 4 sheets-sheet s n INVENTOR. ÈY ATTORNEYS @CL s, 35946. G, w_ MQR'K » 2,405,806 SCRAPER ' Filed Aug. 2, 1943 4 Sheets-Sheet 4 INVENTOR. BY Mgg/W AUORNBYS. '2,408,806 Patented Oct. `8, 1946 l UNITED STATES PATENT OFFICE 2,408,806 SCRAPER .George W. Mork, South Milwaukee, Wis., assignor to Bucyrus-Erie Company, South Milwaukee, Wis., a corporation of Delaware » . . Application August 2, 1943, Serial No. 495,981 (Cl. 37-133) 11 Claims. 2 1 My invention relates to new and useful im movements in wheeled Scrapers, and more par ticularly to that type of such Scrapers, in which the bowl lills at its front end and dumps at its rear end. Y ln devices of this sort, the bowl is pivoted, ad jacent its rear lower corners, to the carrying frame. A single hydraulic cylinder, or a pair of cylinders, mounted on the frame, serves to rotate the bowl about its pivot, in either direction from its neutral (i. e., carrying) position. , Each end of the bowl is provided with a clo sure, the front closure being known as the “apron,” and the rear closure being known as the “end gate.” In addition to my principal objects, above stated, I have worked out a number of novel and useful details, which will be readily evident as the description progresses. My invention consists in the novel parts and in the combination and arrangement thereof, which are defined in the appended claims, and of which one embodiment is exemplified in the accompanying drawings, which are hereinafter particularly described and explained. Throughout the description, the same reference number is applied to the same member or to sim ilar members. . Figures l, 2, and 3 are side elevations of one variant of my scraper, in digging, carrying and dumping positions respectively. When the bowl tips downward into its digging position, the apron opens. When the bowl tips VFigure 4 is a plan View of that same variant, in carrying position. upward into its dumping position, the end gate . Figure 5 is an enlarged side elevation of the opens. But, although these functions have been at 20 reversible side cutter, in place. Figure 6 is an enlarged end elevation of the tained in the prior art with a fair degree of sat reversible side cutter, taken along the lines Ii-B isfaction, I have found it desirable to eifect the following improvements. of lï‘igure 5. . - Figures 7, 8, and 9 are side elevations of a sec The arms of the apron should be lengthened, ond variant of my scraper (namely the variant 25 and should be pivoted adjacent the rear end of which involves the bowl-lowering feature), and the bowl. This causes the apron to rise nearly show the scraper in digging, carrying and dump vertically, when opening, thus minimizing any lendency to jam. The lower forward edges of the side plates of the bowl should be reinforced with a side cut ing positions respectively. `Figure l0 is a plan View of this same variant, 30 in carrying position. . Referring now to Figure 4, we see that II, II ter, which should be reversible. are the side beams, and I2 is the cross beam, and ~ The end gate, instead of being rigidly mounted I3 is the tongue, of the main frame of my scraper. on the arms which manipulate it to open it, The tongue I3 extends to the tractor (not shown) should be pivotally mounted thereon, so that (l) it will normally be assured of full closing, and 35 which pulls my scraper. Wheels i4, I4 support the frame. (2) it will remain open, if rocks and other ob Turning now more particularly to Figures l, 2, structions prevent its closing, rather than to and 3, We see that the bowl I5 is pivoted at IS stra-in the mechanism by attempting to close it to the side beams II. The bowl has a digging forcibly, and (3) when the bowl is tilted from ' digging position to carrying position the rear 40 edge I1. Hydraulic cylinders I8 are mounted in an ele vated position on the main frame, well forward and out of the way of the digging elements. The cylinders rotate the bowl I5 about its pivot t5, gate will loosen slightly so as not to jam. Means should be provided to strengthen the bowl, and at the same time increase its capacity without increasing its size or materially increas 45 by means of piston rods I9, rocker-arms 20, and ing its weight. connecting-rods 2l. The cylinders are fed from Means should be provided to lock the bowl in a source (not shown) on the tractor, by‘means carrying position. so as to take the load off the of piping (not shown), and may be controlled, hydraulic cylinders, and this lock should be auto preferably from the driver’s seat (not shown) , in matically disengageable. The bowl-lowering device of U. S. Patent No. 50 any convenient conventional manner (not shown). 2,308,534, issued January 19, 1943, to 'I'homas R. Considering the carrying position of Figure 2 Paulsen, should be adapted to use on this type as neutral, it will be seen that a retraction of of scraper. piston-rod I9 will lower the bowl I5 to the dig The attainment of these desiderata is the prin cipal object of my invention. ' Y .5.5 ging position shown in Figure 1,. and that al. 2,408,806 n) 4 thrusting ont of this piston-rod will raise the bowl to the dumping position shown in Figure 3. The side walls of the bowl are reinforced by a a rod 3f', capable of engaging in a socket 3G on the rocker-arm 20, when in carrying position, as shown in Figure 2. When not in use, the rod 35 lies on the side beam Il, as shown in Figures 1 and 3. It is to be noted that this device, although set manually, can be unset by merely tilting the system of bracing ribbing 22, on which are l0 cated all the pivot points (hereinbefore or here inafter referred to) , and one of the points of at tachment of the side cutter (hereinafter re ferred to). bowl slightly toward dumping position. The lower portions of the forward edges of the There is also on each side plate a bracing rib side plates of the bowl I5 are each reinforced by a cutting plate 3l, which is shown in more de tail in Figures 5 and 6. Turning to these ñgures, we see that the cut 22A, which performs three functions: i. e., it re inforces the side plate, it serves as a point of at tachment for the side cutter, and it serves as a rubbing plate and spacer for the arms 25 of th apron 2f.' (hereinafter referred to). ' The bowl i5 is also reinforced by two cross braces 23, of triangular cross-section. The for ward one of these two braces serves the dual purpose of a cross-brace and a baille, I having found that its substantial downward rearward face is sufficient to prevent clirt from spilling for- f wardly over the top of the apron. Thus this brace greatly increases the capacity of the bowl. The apron 2d is rigidly secured to two apron arms 25, which in turn are pivoted to the bowl l 5 at 26, adjacent to the pivots 2l of the connect ing-rods 2l. ting plate 3l' has a cutting edge 38, and live bolt holes, three of which accommodate bolts 39 for bolting to the side plates of the bowl i5, and two of which accommodate bolts 40 for bolting to the bracing ribs 22 and 22A. It will be noted that these cutting plates 3'! are symmetrical, and hence reversible by inter changing them. Inasmuch as the Wear comes on the lower portion of each, this reversibility prolongs their life. Along the upper edge of each side plate of the apron 2è .is a wiper bar 4|, which partially closes the gap between these side plates and the side plates of the bowl I5. Turning now to Figures 7 to 10, let us consider the second variant of my scraper. Insofar as The connecting-rods 2l extend to the rear be yond pivots 2l. Arms 28 of end gate 29 are piv oted to the connecting-rods 2i at SG adjacent the parts thereof are the same as those of the pivots If a line be drawn, on Figures 1 and 2, 30 ñrst variant, they will not be numbered nor dis from pivot point 2ï to the point where the bot cussed, except so far as necessary to illuminate tom of end gate rests on the rear end of the the description of the changed parts. iioor of bowl I5, it will be seen that pivot point In this second variant, instead of the wheels 35 lies approximately the same distance above ill icing pivoted on side beams Il as in the iirst that line in Figure i (the carrying position) as it 35 Variant, they are pivoted on extensions 42 of lies below that line in Figure 2 (the digging posi rocker-arms EEA. tion). This means that, when the bowl is tilted Accordingly the entire scraper is lowered for from the digging position to the carrying posi digging (Figure '1); is raised for carrying (Fig tion, pivot point Sil moves in a short arc which ure 8) ;,and is raised slightly, but not appreciably, is substantially a straight line perpendicular to 40 farther, for dumping (Figure 9). During dig the above-mentioned line. This motion tilts the ging, this expedient keeps the bottom of the bowl end gate rearwardly very slightly about its bot more nearly level than would otherwise be the tom point, thus loosening it slightly, and thus in case, and thus renders the bowl more easy to iill. suring against it jamming. Having now described and illustrated two forms A bracket 3i on each end gate arm 28 carries r of my invention, I wish it to be understood that an adjustable stop 3E, capable of engaging the my invention is not to be limited to the speciñc rear end of connecting-rod 2l. ri‘hus, by the form or arrangement of parts hereinbefore de engagement between this stop and the rear end of the connecting-rod, the tilting of the bowl from the carrying position of Figure 2 to the dumping position of Figure 3, will cause the end gate to open; but, in the carrying position of Figure the stop will come away from the con necting-rod 'so that the end gate will rest on its closed position on the bowl; and, if rocks or other obstructions prevent the gate from closing, the bowl can nevertheless return to carrying posi tion, without strain, in spite of the gate being jammed open. This form of end gate construc tion can be employed on other dumping contain ers than scrapers, and even on the front ends of front-dumping containers. The apron ner. `, , is opened in the following‘man When the bowl l5 is tilted from the car rying position of Figure 2 to the digging position of Figure l, rails 34 on the bottom of the apron engage and roll upon rollers 33. These rollers are adjustable in any convenient manner, three scribed, except insofar as the limitations are specified in the appended claims. Whenever in the claims I use the phrase “piv otally supported by,” it is intended to be generic to a direct pivotal support or an indirect pivotal support, at the location specified. I claim: l. Ina dumping container, the combination of: a frame; ground supports for said frame; the container proper, pivoted at one end adjacent its bottom on the frame, for tilting movement in a vertical plane, said container proper being open at its pivoted end; a longitudinally reciprocable rod on each side of the container proper, pivoted means to theside for forcibly thereof, reciprocating and supportedthese by therods; an end gate pivotally supported by the rod-con ' tailler-proper assembly, adjacent the pivotal con nection between the rods and the container prop er; and stop means between the gate and the rods, to limit the downward swinging of the gate with respect to the rods. the rollers, the wider will the apron open duringV 70 2. A dumping container, according to claim 1, digging.l Thus the extent of opening of the furthercharacterized by the fact that the stop positions being shown in Figure 1. The higher apron can be related to the-stickiness or" the ma terial beingexcavated. . . j ` means are adjustable. 3. A dumping container according to‘ claim 1, To take the load oiîthe -cylinders I8 Iduring further characterized by the fact that themeans carrying, there is pivoted on each side beam Il, 75 for reciprocating each rod comprises: a rocker 2,408,806 arm, pivoted on the frame; a cylinder-piston as sembly pivoted on the frame and on the rocker arm; and a pivotal connection between the rocker-arm and that end of the rod furthest from the gate. 4. In a dumping container, the combination of: a frame; ground supports for said frame; the container proper, pivoted at one end adjacent its bottom on the frame, for tilting movement in a vertical plane, said container proper being open at its pivoted end; a longitudinally reciprocable rod on each side of the container proper, pivoted to the side thereof, and supported by the frame; means for forcibly reciprocating these rods; an end gate- pivoted on these rods, adjacent their points of pivotal attachment to the container proper; and stop means between the gate and the rods, to limit the downward swinging of the gate with respect to the rods. 5. A dumping container, according to claim 4, further characterized by the fact that the stop of pivotal support of the end gate when the con tainer is in digging position, is located a given distance below the line which runs from the point of pivotal attachment of the rod and the container to the point of contact between the bottom of the gate and the container; and, when the container is in carrying position, is located approximately the same distance above that line. 9. In a scraper, the combination of : a frame; ground supports for said frame; a bowl pivoted at its rear end adjacent its bottom on the frame, for tilting movement in a vertical plane, said bowl being open at its front end, and having a means are adjustable. digging edge at its front end; a longitudinally reciprocable rod on each side of the bowl, piv oted to the side of the bowl; a rocker-arm piv oted at its lower end on the frame, and at its upper end on the forward end of the rod, and having a downward extension pivoted on one of the ground supports; and means to rock the rocker-arm; whereby, when the rocker arms are rocked to tilt the bowl forwardly into digging 6. A dumping container according to claim 4, further characterized by the fact that the means position, the frame is lowered with respect to the ground supports, thus lowering the bowl pivot. for reciprocating each rod comprises: a rocker 10. In a scraper, the combinaion of: a frame; arm, pivoted on the frame; a cylinder-piston as ground supports for said frame; a bowl pivoted sembly pivoted on the frame and on the rocker arm; and a pivotal connection between the rocker-arm and that end of the rod furthest at its rear end adjacent its bottom on the frame, for tilting movement in a vertical plane; a lon gitudinally reciprocable rod on each side of the bowl, pivoted to the side of the bowl; a rocker from the gate. 7. A dumping container according to claim 4, further characterized by the fact that the point of pivotal support of the end gate is so located below and toward the dumping end of the con tainer from the point of pivotal attachment of the rod and the container that when the con arm pivotally supported by the frame, and piv oted on the forward end of the rod; means to rock the rocker-arm; and a lock between the frame and at least one rocker-arm, whereby to hold the bowl in carrying position, said lock com prising a downwardly facing socket carried by tainer is tilted from digging to carrying position the rocker-arm, and a cooperating compression the first above-mentioned pivot will move in a bar, pivotally supported by the frame, and tilt path substantially perpendicular to thel line able into end engagement with the socket. 11. A dumping container, according to claim 4, further characterized by the fact that the point of pivotal support of the end gate is located a slight distance toward the dumping end of the which runs from the second above-mentioned pivot to the point of contact between the bottom of the gate and the container, thereby slightly loosening the gate from the container in carry ing position, and thus avoiding jamming the con tents of the container. 8. A dumping container according to claim 4, further characterized by the fact that the point container away from the pivotal axis of connec tion of the rods to the container. GEORGE W. MORK.