Патент USA US2113660код для вставки
April 12, 1938. R. G. L'È TouRNEÁU _ DRAG 2,113,660 scRAPER Filed Aùg. 1o, 193e INVENToR ' vATTORNEY Patented Apr. l2, .l u I _ 2,113,660 UNITED STATE s PATENT OFFICE 2,113,660 mmc scaAPEa *Robert G. Le Tourneau, Peoria, Ill., assignor .to R. G. Le Tourneau, Inc., Stockton, Calif., a cor poration of California Application August 10, 1936, Serial No. 95,148 6 Claims. 'I’his invention relates to wheel and tractor sup' ported drag scrapers; my principal objects being same by a cross beam 9, so that said beam and arms form a substantially non-distortablemnit. to provide a scraper of this character in which the wheels and bowl are so mounted relative to 5 `each other and controlled so that a great range of vertical movement of the bowl may be had; one in which the bowl may be disposed at a trans beam in transversely spaced relationship; these Standards III are rigid with and depend from this standards supporting wheels II whichare dis posed outwardly thereof. l . One arm 8 is mounted on the adjacent side plate by a non-adjustable pivot I2. The pivot verse tilt relative to the wheels so as to make the . scraper suitable for sidehill work; and one having 10 an eilicient and easily operated means to hold the point of the opposite arm however is made ver tically adjustable by the following means: the 10 forward end of said arm projects between the ad jacent plate I and a bracket plate I3 rigid with said side plate, and having a block I4 projecting from its outer face for its full height. The block bowl in a raised position for transportation, with out relying on the tension of the control cable or other operating mechanism. Aiurther object of the invention is to produce and bracket plate as well as the plate I are pro 15 a simple and inexpensive device and yet one which 15 vided with a number 'of vertically spaced sets of will be exceedingly effective for-the purpose for holes I5 and the such are 'adapted to receive the pivot pin I6 of the adjacent arm 8. This pin is of V structure and-relativearrangement of parts as will course removable and to prevent it from unde fully appear by a perusal of the following speci ' sired removal, I provide a removable locking pin which it is designed. 6 ' These objects I accomplish by means of such 20 I'I tication and claims. ' ’ ` ` which extendsV horizontally ' through the In the drawing similar characters of reference indicate corresponding parts in the several views: block I4 of the pin I6 as >shown in Fig`.`3, It is of Figure 1 is a side elevation of the scraper in a Inf this manner by changing the position ofv the pivot bolt. I6', and sincethe arms 8 and the wheelsV form' a rigid unit, the bowl will be set at'diiierent scraping position. _ ' ` . , v course to be understood that the block isdrilled at each pivot' pin hole to receive the locking pin. o Y Figure 2 is a sectional elevation of the scraper in a ~raised transporting pc'isitio?i.V ` transverse` >slopes as operating conditions may ' Figure 3 is a fragmentary plan section taken on l require; Í " " ’ 1 Y' ' the line >3-l3 of Fig'. 1. - ' Referring now more particularly ’to the char? acters'ofref'erence on the drawing,> the bowl of theA scraper 'comprises side plates I and a back plate 2, the lower portion of which is disposed with a forward slope to its lower end and has a scraping plate 3 across such end and set at the same slope.- This slope is such that `while the weight of the dirt in the bowl when the latter is in a scraping position tends to hold the same down so as to enable the plate to properly dig into 40 the ground and avoid chattering, while at the same time such dirt will readily slide oif the plate when thebowl is lifted the relatively short distance necessary for leveling purposes. This _slope is ‘substantially 45° to the horizontal. A cross beam 4 connects the side plates at the top and front, and a rigid‘braced tongue 5 extends forwardly and downwardly from said beam cen trally thereof.- At its forward end the tongue is provided with a swivel coupling unit 6 adapted' for supporting connection with the draw bar 'I of The vertical'movement of -the bowl is controlled by a single tractor-‘operated cable I8 as -followstlv secured on end behind the bow1"adjacent thebottom and centrally of its width is a sheave block I 9, while occupying a similar position on the cross beam 9 and overhanging the block- I9 is another 35 sheave block 20. AThe cable I8 passes along and over the bowl from the tractor, about a direction changing pulley 2| iixed on the top of the bowl centrally thereof, down to the sheave block I 9 and then up to the sheave block 20; passing about and 40 between these sheaves to an anchor as at 22 on the latter. It will thus be seen that by pullingl on the cable the bowl will be raised. relative to the Wheels, while lowering of the bowl is effected by slacking up on the cable and allowing the weight of the bowl to cause it to drop. vDue to the length of the arms 8 a relatively large raising andlower- » ing movement of the bowl may be easily had 4(about three feet at the back being obtainable) which is suñ‘icient for deep scraping as well as 50 ' providing for a high ground clearance of the bowl the tractor. ‘ „ when being transported. At the same time the , Pivoted on the side plates at the front and sub stantially midway of their height are rigid arms wheel mounting arms 8 do not relatively move B. ’I‘hese extend to terminations rearwardly of 55 the bowl and are rigidly connected behind the through any excessively great arc. ‘ ' When it ls desired to transport the scraper I 55 2 . 2,113,600 _ have provided a means to enable the bowl to be I held in the necessary raised position without having to- maintain the cable Il on a tension. This means comprises a link 23 pivoted on and depending from the underside of the beam l and lugs 24 mounted on and projecting rearwardly from under the sheave block i8. The lugs and the lower end of the link are drilled to receive a coupling pin 25. Therefore when the bowl has 10 been raised by a pull on the cable sumcient so that the hole in the link when swung between the lugs alines with those in the lugs, the pin ß may be projected thereto and the tension on the cable may then be released. The weight of the bowl will 15 then be entirely supported by the link and since the bowl is then of course empty and the link is __on a tension besides being ina central position relative to the width of? the bowl, said link will easily support its load without undue strain. 2,0 From the foregoing description it will be readi ly seen that I have produced such a device as L'. substantially fulfills the objects of the invention . as set forth herein. While this specification sets forth in detail the 25 present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims. Y' ~ i ' Having thus described my invention, what I claim as new and useful and desire to secure by Letters Patent is: l. A drag scraper comprising a bowl having side plates, means to support the bowl at the 35 front from the ground, arms pivoted on the side plates adjacent their forward ends and projecting beyond the rear end of the bowl, a cross beam _rigidly connecting said arms rearwardly of the link, said 1R88 and link having holes adapted to match'when the bowl is raised a predetermined distance and a coupling pin adapted for remov able placement through the holes. . - 3. A drag scraper comprising a bowl having side plates, means to support the bowl _at the front from the ground. arms pivoted on the side plates adjacent their forward ends and project ing beyond the rear end oi' the bowl, a cross beam rigidly connecting said arms rearwardly of the 10 bowl, ground engaging wheels mounted in con nection with said _cross beam, a sheave mounted on the bowl behind and toward the bottom thereof centrally of its width, another sheave mounted on the cross beam ‘in alinement with the‘bow'l sheave, a direction changing pulley on the back of the bowl at the top, and a pull cable extend ing over the pulley from in iront, down to and over the bowl sheave and up to and over the cross beam sheave to an anchor adjacent one of 20 said sheaves. « 4. A drag scraper comprising a bowl having side plates, altongue rigid with and projecting forwardly from the bowl and adapted at its front end for swivel connection with a tractor, arms extending along the side plates outwardly of the bowl to a termination rearwardly of the same, a member rigidly connecting the arms at their rear ends, wheels supporting said member from the ground', pivot connections between the 30 arms and bowl. 'and means to adjust the pivot connection of one arm vertically. ' . ` 5. A structure as in claim 4 in which said last named means comprises a bracket plate mounted ion the adjacent side plate ofthe bowl land over lapping the front end of the adjacent arm, a block rigid with and -projecting outwardly from , the bracket plate, said block, bracket plate ¿and bowl, ground engaging wheels mounted in con nection with said cross beam, and means be tween-_ the cross beam and the bowl below the side plate having vertically spaced sets of match ing holes. a pin for removable placement through Sgam to control the raising and lowering of the removable placement through the block and pin. tliearmanda'mysetoflioles,anriacrosspini'orv 8. AdragscrapercomprisingabowLmeansto 2. A drag scraperl comprising a bowl, means- support the bowl- at the front» end from the to support the bowl at the front en_d from the ground. arms pivoted on the bowl adjacent its ground, arms pivoted on> the bowl adjacent its forward end and projecting beyond the rear end , of the bowl, wheels mounted in connection with the arms, Va-crossbeam connecting the arms rear-` wardly of the bowl, means to raise and lower _the bowl. a link mounted on and depending from the cross beam.- lugs mounted on and projecting reu-~ wardly: from the bowl in alinement with the 1.5 forward end and projecting beyond the rear end ofthebowhwheelsmountedin connectionwlth 'thearmaacrœsbeamconnecting'thearmsrear wardlyofthcbowhtensionmeansconnectingthe cross beam and bowl belcw‘said beam, and controlmeanstoaltertheeifectivelengthofsaid ' 'ROmTG.LlTOURNEAU.