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Aug. 20, 1946. _ - V. L. SCHIELD mamas EARTH MOVING ‘DEVICE Filed Feb. '26; 1944 4 SheetS-Sheet 1 » 72 INVENTQR. l/E/PN ‘L. 50/1540 ' ATTOIP/VEX‘ ' Aug. 20, 1946. ' v, LSCHIEL§ ' A05, EARTH MOVING DEVICE VE/P/V L. JCH/ELD BY ~ P ' _ ATT/PNEK' 3 ' Aug» 2@, 19%. ~ v. L. SC-HELD ~ ‘ 2,405,981 EARTH MOVING DEVICE _ _ Filed Feb. 26, 1944 , 4 Sheets-Sheet s F. ' INVENTOR. l/E/PN L. JCH/ELO AITTOPNEY. Patented Aug. 20, 1946 2,485,981 UNITED STATES _ PATENT 0 FFIC‘E 2,405,981 EARTH. MOVING DEVICE Vern L. Schield, Waverly, Iowa Application February 26, 1944, Serial No. 523,998 3 Claims. (01. 2'14—1?.8) 1 2. This invention relates to earth moving devices and has particular reference to an excavating, dirt moving and material handling device. While many devices of the excavating shovel ‘type have been proposed for large scale earth moving, such devices have been for the main part large, heavy, especially designed and constructed machines which are notoriously expensive to buy Figure 6' is a. view in elevation of a. clutch fork for use with the clutches of the. turntable swing ’ and maintain. It. is a particular object and an important ob ject of my invention. to provide a small machine constructed of readily available units and parts which, by reason of their use for other purposes, mechanism. Referring now more particularly to Figure l; a device constructed according to my invention may be mounted on a mobile base- such as. the stripped chassis of a truck such as illustrated at. lit. The device of course could be mounted on a tractor or the like in the manner I am about to describe. 10 In mounting the» device on the rear of a truck I preferably employ a pair of H-' channels it and I2 secured to the upper faces of‘ the side. members of the» truck frame to reinforce the members and toact- as a means for securing the channelled‘ ring are low in ?rst cost and maintenance, so as‘ to make available to the public a low cost. machine l3 on the truck. This channelled ring is of par which is relatively light and small but which can ticular importance and a considerable portion of the cost of manufacturing a device of this char nevertheless do many of the common excavating jobs for which the large machines‘ are too expen acter is saved? by utilizing an ordinary steel» chan sive: to operate. nel which is rolled into a ring. This ring thus Still another object of my invention is to pro~ 20 provides not only a circular path on which rollers 24. roll but also provides a circular lip or ?ange [5 vide a machine adapted to be mounted on any ordinary conventional long Wheel base truck chassis so as to eliminate the necessity for a for the hook roller I51 to roll under to keep the machine from tipping. special built truck or heavy expensive caterpillar To the inner face of the channel member [3 I type tractor or carrier. 25 secure an internal gear or bull gear [4. This gear is preferably bolted in place so’ that it can be re Still another object of my invention to pro vide a device which is readily adaptable for use placed and this bull gear is readily available on the open market without the necessity of using with a large variela/v of attachments such as drag a specially constructed and cut gear. lines, cranes, ditching machines, trench hoes; ex cavating shovels and the like. A rectangular frame having side members- It and end members H is mounted for rotation about Still another object of my invention is to pro- ' the axis of the bull gear by means of a through vide an extremely simple device which is con structed of relatively widely available parts and units so that repair may be quickly effected‘. Other and further features and objects of the ~ invention will be more apparent to those skilled in the art upon a consideration of the accom panying drawings and following speci?cations, wherein is disclosed a single exemplary embodi ment of the invention, with the ‘understanding, however, that such changes may be made therein as fall within the scope of‘ the appended claims, Without departing from the spirit of the inven— tion. 45 In said drawings: Figure l is a view in perspective of a device constructed according to one embodiment of my invention. > shaft, center pin or-king pin It. The center pin [8 is rotatably mounted in- sleeve - bearings: t9 and 21. The sleeve bearing I9 is se cured’ to crossmembers 22 which are in turn- se cured to the channel member [3. The bearing member 21 is secured to ‘a cross member 23 which is. in turn secured to the side frame members I16‘ of‘ the turntable frame. Rollers 24 are provided which are rotatably mounted in turn-table frame stiffening members 26' and these rollers‘ roll on the bull ring l3. A plan view‘ of the various members'just described is shown inFigure 3'. The turntable frame It and I1 is thus free to rotate on the ?ange of the steel channel ring, and held in place by the king pin t8 A power means, such as the internal combus— Figure 2 is a view,’ partly in side elevation and partly in section, of the turntable of the device 50 tion engine, illustrated at 30, is mounted on an engine irame' 31 mounted above the turntable shown in Figure 1. frame It‘. The unit here illustrated is a hoist unit Figure 3.‘ is a plan view of the turntable of the commonly used for elevating building material in structure shown in Figures 1 and 2. erecting buildings, and includes two drums Figure 4 is a view in section of the turntable mounted in side frame members 32, these drums 55 and bull ring shown in Figures. 2 and 3. being driven from the power unit 38 through a Figure 5 is a view, partly in section and partly chain drive such as that enclosed in the housing in elevation, illustrating the turntable drive and 33; These units are provided with the drums 34 the control means for controlling the swing of and 38. and; the drum 36 has an extension shaft 3'! the turntable and the movement of the dipper 60 projecting beyond the side of the frame which I stick, or other excavating means, and utilize in rotating or swinging the turntable. 2,405,981 ‘ . 4 3 The means for rotating the turntable includes a sprocket 38, a chain 39, and sprockets 4|, the sprocket 4| being mounted upon a cross shaft chine constructed according to my invention per mits mounting of the operating machinery well back of the center of gravity so that the need or swing shaft 42 in bearings‘43; which in turn for dead counterweights is eliminated and the machinery itself acts as a live counterweight. Although I have described a speci?c embodi 'ment of my invention, it is apparent that modi connected through the links 48 to the control‘ ' ?cations thereof may be made by those skilled member 49 to be selectively engaged to rotate the in the art. Such modi?cations may be made turntable in one direction or the other as de 10 without departing from the spirit and scope of sired. Rotation of the turntable is Y effected my invention as set forth in the appended through the bevel gears 5| or 52 which selectively claims. drive the bevel gear 53 in one direction or the I claim as my invention: other to rotate the spur gear 54 in one direction 1. In an earth working device of the character or the other as desired. The spur gear 54 is‘in ‘described, a truck having a rear axle and rear mesh with the bull gear l4 and since the shaft supporting and driving wheels, and a chassis 56 on which the spur gear and bevel gear are frame, a turntable mounted on the rear of said mounted is rotatably mounted in a bearing 51 on frame substantially over the rear axle and in the turntable frame; rotation of the turntable in cluding a forwardly extending frame, an elevator one direction or the other as desired is secured. A 20 hoist unit mounted on the forward end of said clutch fork 50 is shown in Figure 6 by which the turntable frame, a boom pivoted at its inner are secured on channel members 44. ' ' l The shaft 42 is provided with oppositely dis posed clutches 46 and 41 and these clutches are clutch collars 55 are shifted. An A frame or boom BI is pivotally'mounted on end to the rear end of said turntable frame and extending generally rearwardly, a mast structure the end of the turntable frame opposite to the 25 ?xedly carried at the rear end of said turntable power unit 30 by means of pins 62 and projects frame and extending substantially directly up outwardly therefrom. wardly therefrom and generally above said rear I preferably mount a mast structure on the axle in substantially all positions of said turn turntable frame by means of the A shaped sheave table, and cable means extending between said support frame 63; the mast members 64, 66, struts - - hoist and boom and trained over the upper end B1 and E8, and tension members 89 and ‘II. This structure is stiffened by the cross members 72. The sheaves 34 and 35 are geared together as by gears (not shown) and these sheaves may be engaged to their respective drive shafts by means of clutches indicated at ‘l3 and“. If the clutch 14 is engaged the sheave 34 is rotated and the A frame may be raised or lowered by means of the ‘cable 16 which is reeved over the cat-head sheave ‘H, the boom head 18, and dead ended on the of said mast structure. ' 2. In an earth working device of the character described, a truck having a rear axle and a chas sis frame, a turntable mounted on the rear of said frame substantially over the rear axle and including a forwardly extending frame, an ele vator hoist unit having two driving drums and mounted on the forward end of said turntable frame, a boom pivoted at its inner end to the rear end of said turntable frame and extending I ’ 40 generally rearwardly, a mast structure carried If the clutch 13 is engaged, the drum or sheave at the rear end of said turntable frame and ex 3B is rotated in one direction or the other to either tending substantially directly upwardly there reeve in the line 19 or let it out to thus swing from generally above said rear axle in all posi the stick 8| which is pivotally mounted on the tions of said turntable, a ?rst cable means ex end of the boom 6 l. The dipper stick 8| may car 45 tending between said hoist unit and boom and ry the ditching bucket 82 or a conventional ex ‘trained over the upper end of said mast-struc cavating shovel. The clutches ‘l3 and 14 are con ture, and a second cable means extending directly . trolled by means of control handles 83 and 84 from said hoist unit to a dipper stick carried through any suitable linkages; as shown. Foot ~ by said boom, one of said cable means being pedals 85 may be utilized for braking the sheaves 50 connected with one of said driving drums and 34 and 36. the other cable means being connected with the Obviously since two lines are available, a crane other of said driving drums. may be mounted in the place of the A frame GI 3. In an earth working device of the character and one line used to raise and lower the boom described, a truck, a turntable mounted generally and the other line used to raise and lower a load. 55 over the rear wheels thereof and including a In the same manner a drag line may be rigged up forwardly extending frame, an elevator hoist unit and operated from the structure here shown. The mounted on the forward end of said turntable entire turntable may be rotated as desired, so that frame, a boom pivoted at its inner end to the a load may be picked up and loaded in the wagon f 60 rear end of said turntable frame and extending or truck or disposed in a pile as desired. generally rearwardly therefrom; a mast structure including an A frame extending substantially It is apparent that I have provided a machine which may be moved from one job to another vertically from the rear end of the said turntable at a minimum of expense and time. This effects frame, a freely rotatable sheave mounted in the a material saving in the overall cost of a job‘ upper portion of said A frame; a ‘bracing struc_ and permits the machine to accomplish many 65 ture for the A frame including struts mounted, at their lower ends adjacent the lower ends of small jobs or operations in a short time. The .boom or A frame 6 l. the A ‘frame and diverging upwardly and for wardly away from the A frame and the struts, and tension members extending from the upper ments. The parts are easy to get at for repair 70 ends of the struts forwardly and downwardly to the forward end of the turntable; and a cable and servicing.‘ The swinging clutches may be extending between said hoist and said boom and mounted or dismounted in a few minutes. This trained over the said sheave. machine is extremely light, which also makes it extreme outstanding simplicity and the structure of the machine permits ready and quick servicing and repair of parts and substitution of attach-4 highly portable, and the operator can quickly. change from one attachment to another. A ma- 75 VERN L. SCHIELD.