US1749741A - Scraper - Google Patents

Description

March 4, 1930.

l.A P. GREEN SCRAPER Filed May 10, 1926 3 Sheets-Sheet 1 23 J5 20 lg I l y', l @Il o l @glmwy di March 4, i930.

L. P. GREEN 1,749,741

scnAPnR Q Filed lay 10, 1926 5 Sheets-:Sheet 2 L. P. GREEN March 4, l 930.

SGRAPER Filed lay 10. 1926 5 Sheets-,Sheet 5 Patented Mar. 4, 1930 UNITED STATES PATENT OFFICE A LESLIE I. GREEN, OE CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, T

IRA J. WILSON, OF WINNETKA, ILLINOIS SCRAPER Application filed May 10, 1926.

My invention relates to scrapers of the drag type which are especially adapted for' `r which might be called aV pivoted bottom scraper.

One of the objects of the present invention is the provision of a scraper which is simple in construction and eflicient in operation.

Another object of the invention is to provide a scraper in which the bottom thereof is pivoted to the sides of the scraper so that the same may be tilted with respect to the' scraper proper for dumping the contents thereof. Y

A further object of the invention is the provision of a scraper having a pivoted bottom in which the pivot of the bottom may be adjusted with respect to the scraper prop'- 7 er so as to be more or less aggressive in digging and scraping the material over which the scraper is passing.

Another object ofthe invention is to provide a pivoted bottom scraper in combination with a pivoted cutting or digging member by means of which the material is collected by the digging member and is discharged onto the pivoted bottom of the scraper.

A further object of the invention is to provide a scraper which can be dragged forwardly along any plane without collecting any material until the desired point of cutting, diggingl and collecting is reached.

Another object of the invention is to provide means for scraping the inner sides of the wall of the scraper to remove substantially all of the material therefrom at each time the scraper is dumped.

A still further object of the invention is to provide means for simultaneously ,dumping the pivoted bottom and pivoted cutting member so as to permit a complete discharge of all the material collected by the scraper.

Another object of the invention is to provide an automatic means for locking the Serial No. 107,873.

pivoted bottom and pivoted digging member in their dumped position.

These and other objects are accomplished by providing a construction and an arrangement of the various parts in the manner hereinafter described and particularly pointed out in the appended claims.

Referring to the drawings: Y

Fig. l is a side elevational view partly in cross section showing the construction of one form of my improved scraper.

Fig. 2 is a side elevational view'partly in cross section showing another form of an improved scraper. j

Fig. 3 is a top plan View of the scraper shown in Fig. l.

Fig. 4 is a front elevational view of the scraper shown in Figs. l and 3.

Fig. 5 is a side elevational view partly in section of the preferred form of my improved scraper showing the pivoted bottom and pivoted cutting or digging member in their opcrative position, and

Fig. 6 is-a side elevational view partly in section of the scraper shown in Fig. 5 with the pivoted bottom and cutting or digging member shown in their dumped position.

For the purpose of illustration I have shown my invention embodied in a scraper ot the boxlike type, but it will, of course, be understood that the same is capable of being embodied in scrapers of other types. This scraper comprises two longitudinally extending walls l0 and 1l and a rear transverse wall 12 connected in any suitable manner, the wall l2 has its lower edge terminating short of the bottom, as shown at 13 for the purpose of forming substantially a rectangular opening` 18 in the rear wall adjacent the bottom. The forward ends of the side walls 10 and ll are connected together by the transverse angle member 14 which in turn is connccted to the side walls by suitable brackets tom 19 is provided with longitudinallyv extending sides 2O and rear end 21, the forward end of the bottom being preferably left open for the purpose of permitting the bottom to collect the material as the scraper is'dragged over the ground. lThe side walls 20 and end wall 21 of the pivoted bottom 19 are of relatively short height but the end wall 21'is of suficient height Vto extend over the opening 13 in the rear wall 12 of the scraper. In order to permit the scraper bottom to more aggressively cutor engage the material, de# pending on the nature of the material being collected, I provide an adjustment for the pivot of the bottom which includes two additional apertures 22 so that the pivot of the bottom may be changed so as to give the bottom a greater inclination downwardly with .Y respect to the scraper proper, if such an adjustment is required. .5

The mechanism for actuating the'pivoted bottom to dump the same after the scraper f has been filled comprises a fulcrumed lever 23 which is pivoted by means of a pin 24 supported in two oppositely disposed vertically Y extending` spaced apart standards 25. These standards 25 are secured by means of rivets 26 to a transverse angle 27 which in turn is secured to the rear wall 12 of the scraper by rivets or other suitable means. The standards 25 are provided with additional apertures 25 so that the pivot of the lever 23 may beadjusted so as to elevate the pivot with respect to the scraper. The lever 23 is also provided. with additional apertures 23V so that the fulcrum of the lever 23 may be adjusted to these apertures for adjusting the lever longitudinally of the scraper. 'Secured r.to the forward end of the fulcrumed lever 23 and on the opposite sides thereof are two plates 28. These plates 28 are preferably tri angular in form and are secured to the opposite sides `of the lever 23 by means of bolts V29. The lower end of the plates 28 are connected to the pivoted bottom 19 by means of twofoppositely disposed connected links 30, the upper ends of which are pvotally connected by a bolt 31 and the lower ends of which are connected by bolts 32 which extend through angle brackets 33. These brackets 33 Secured to the rear of the fulcrumed lever` 23 and on the opposite sides thereof are two downwardly extending brackets 40. These brackets are secured to the lever 23 by means of rivets 41. Journalled between the brackets-40 on a pin 42 is a sheave v43. Trained about the sheave 43 is a rear drag cable 44 which has one end, as shown at 45, secured by means of a bolt to two spaced apart brackets 46, which in turn are secured to the rear wall 12 of the scraper. Journalled on a bolt 47 between therbrackets 46 and at the lower ends, is a sheave 48.r The drag cable is trained about the sheave 48v and extends upwardly and is trained about the sheave 43 so that when the rear drag cable 44 is drawn rearwardlyiwith respect to the scraper the fulcrumed lever 23 isoscillated from its full line position, as shown inFig. 1, thereby swinging or tilting thexbottom 19 from its full line position to its dotted line position shown in lthis figure, dumping the contents of the scraper.'

Secured tothe lever 23 in a position above the brackets 4() is an Vupwardly extending" of the members-36. The forward end ofthe cable 52 isY connected by means of a link 54 to two converging drag cables 55 which havel their rear endsconnected by links 56 to the opposite sides 10 and 11 of the scraper. The

drag cables 55 are trained about two oppositely disposed sheaves 57 which are journalled in a bracket 58.A Theforward end of the bracket is connected to the forward dragcable 59. From the above it'will be noted f that when the pivoted bottom is being returned from its dottedline position to its full line position shown in VFig. 1, the forward drag cable 59 is drawn lforwar ly, thereby drawing the cable 52 forwardly and swinging the fulcrumed lever 23 about its pivot 24 from the dotted line position to the full line position until the lower edge of the fulcrumed lever strikes the transverse angle 27, as shown at 27 At the same time it will be noted that when the link 54 of the cable 52 reaches the sheaves 57 on the drag bracket Y 28, the pivoted bottom 19is returned to its normal operative position and the scraper is ready to be drawn forwardly.

By having the cable 52 connected up with' the draft cables 55, sheaves 57 and link 54 in the mannerabove described, it will be readily understood thatshould it be desir-Y able to draw the scraper forwardly without loading the same the lock 61 may be maintained in engagement with the transverse member 27 and support the pivoted bottom in its dumped position. When the scraper is drawn forwardly in this position the sheaves 57 on the draft bracket 58 will engage the bights of the cables 55 in a manner to balance the tension between the cables 52 and 55 so that the scraper will be drawn forwardly withoutv tilting the rear end of the scraper. In other words, if the forward draft cable 59 was connected up by merely a link to the cables 52 and 55, the cables 55 would become slack and a forward pull on the cable 52 would cause the scraper to be tilted on its forward end.

The scraper is provided with rearwardly extending runners 60 which have their lower edges inclined so as to permit the scraper to be drawn rearwardly at the time the load is being dumped from the scraper.

In the operation of my improved scraper, let us assume that the pivoted bottom is in full line position as shown in Fig. 1 and the cable 59 is being'drawn forwardly until the scraper has been filled with material and when it has reached the point or position where it is to be dumped, the forward drag cable 59 is slackened and the rearward drag cable 44 is drawn rearwardly causing the lever 23 to swing from its full line position to its dotted line position and at the same time tilting the bottom 19 from its full line position to its dotted line position shown in Fig. 1. During this movement it will be noted that the sides 20 of the pivoted bottom 19 operate in close proximity with the sides 10 and 11 of the scraper so as to clean the material therefrom. It will also be noted that by having the rear wall 12 of the scraper terminating short of the bottom of the scraper that no obstructions will interfere with the rearward movement of the scraper proper as it is being drawn rearwardly to dump its contents.

rIn order to permit the scraper to be dragged forwardly along a plane without collecting any material until the desired point of cutting, digging, and collecting has been reached, I provide an automatically actuated lock for maintaining the pivoted bottom in a dumped or tilted position. This lock comprises a bell crank 61 which is pivoted by means of a pin 63 to the lever 23. The lower end of the bell crank is notched, as shown at 64, to form a lock so that the same may engage the forward edge of the transverse.

member 27, as shown in the dotted lines in Fig. 1. The upper arm of the bell crank 61 is normally actuated in a forward direction by an extension spring 65 which' has one end connected to one of the plates 28 and the other end thereof connected to the upper arm of the bell crank 61.

From the above it will be noted that when the lever 23 is actuated to position in which th`e bottom is being tilted to empty the contents in the scraper, the locking member 61 will be actuated by the spring to lock the pivoted bottom in its tilted position and when it is necessary to release the lock to lower the tilted bottom, suitable manually operated connections 66 which connect with' the bell crank 61 are provided. In order to guide the cable 52 over the top of the scraper proper` I have provided a guiding eyelet 67 which is secured to the transverse angle mem ber 14. This eyelet is provided with a small sheave 68 which is journalled in the lower side of the eyelet and permits the cable 52 to move freely during the operation of tilting the bottom of the scraper.

Another form of my invention shown in Fig. 2 is equipped with the same operating mechanism as that shown in Fig. 1 with the exception that I have provided a dierent form of pivoted bottom or cutting member, as indicated by the reference character 69. This pivoted bottom or cutting member is preferably made with a single piece of metal and is so formed that the cutting portion or bottom 70 is inclined at an angle at substantially 45o with respect to the horizontal edges of the scraper when its normal operative position, as shown in Fig. 2, and the side walls thereof are inclined upwardly, as shown at 71, toward the rear of the scraper. This inclined bottom or cutting member is particularly adapted for use in connection with excavating and levelling material in which the nature of the material is hard and difficult to excavate. In order to permit the inclined bottom 7 0 of the cutting member 69 to be adjusted angularly with respect to the scraper, I provide additional apertures 72 so that the pivot 18 of the cutter may be adjusted. This permits the scraper to be adjusted so that the best results can be accomplished in taking care of the varying conditions found in excavating.

With the scraper formed with this construction of digging member I have formed a construction which might be said to be a bottomless type of scraper.

In the preferred form of my invention, as illustrated in F 5 and 6, I have combined substantially the two forms shown in Figs. l and 2, by positioning the pivoted cut-ting member in advance of the pivoted bottom. In this connection I have arranged operative connections between the pivoted bottom and the cutting member' so that they are simultaneously actuated when the contents of the scraper are discharged. The mechanism for actuating the pivoted bottom to dump the material and return the same to its normal operative scraping position is identical with the mechanism shown in Figs. 1 and 2. but in addition thereto, I have provided a pivoted angle member 14 of the scraper.

link 73 which is pivotally supported at its forward end on a pin 74 supported in oppositely disposed brackets 75, which in turn are supported and secured to the transverse connected to and adjacent'the rear end of the link 73 by means of a bolt 7 6 is a connecting link 77. The connecting link 77 has its lower end connected by means of the bolt 31 to the plates 28. Pivotally connected to the bolt 7 6 which forms the pivotal connection for the links 73 and 77, is a third connecting link 78 which has its lowerend pivotally connected to a bracket 79, which in turn is secured by means of bolts 8O to the inclined bottom 81 of an inclined cutter or digging member 82. The inclined cutter or digging member 82 is pivotally connected by means of bolts 83 to the forward edge of the opposite walls 10 and 11 of the scraper. In order to permit the cutting and digging member 82 to be adjusted longitudinally with respect to the scraper' and pivoted bottom, I have provided additional apertures 84. I have also provided a plurality of apertures 85, 86 and 87 in the,

upper ends of the links 77, 78 and 7 3, respectively, so that the pivotal connection 7 6 may be adjusted in these links in order that the proper operative relationship between the cutting member 82 and the pivoted bottom 19 may be accomplished for taking care of the varying conditions encountered in eX- cavating. In order to accomplish the return of the dumping bottom 19 and the pivoted cutter or digging member 81 from their dumped position to their normal operative position or from their position shown in Fig. 6 to the position shown in Fig. 5, I have provided a sheave 39 mounted between the members 36 over which the cable 52 is trained. The supporting or holding of the cable at this point when the pivoted bottom or cutting knives are in their dumped position or in the position shown in F 6, affords the necessary leverage on the lever 23 to return the pivoted bottom and cutting members to their normal operative position. The forward portion of the cable 52 is further guided over a sheave 88 which is journalled on the common pivot 76 of the links 73, 77 and 78. This, in addition to forming a guide cable 52, also assists the return of the pivoted bottom and cutting blade 81 to their normal operative positions as the drag cable 52 is drawn forwardly.

In the operation of my preferred form as shown in Figs. 5 and 6, let us assume that the parts of the scraper are in the position shown in Fig. 5 and as the forward drag cable 59 is drawn forwardly the inclined bottom 8lof the cutting or digging member 82 conveys and discharges the material onto the pivoted bottom 19v and continues this until the scraper has been filled with material .and when the-scraper has been drawn to the Pivotally point or position to where the material's to be discharged the forward drag cable 59 is' slackened and the rearward drag cable44 is drawn rearwardly by reason of which the fulcrumed lever 23 is actuated about its pivot, and by reason of the link connections 30, 77 and 78 the pivoted bottomf19 andthe cutting member 82 are actuated about their pivots 18 and 83 respectively, to dump the contents of the scraper and at the same time the scraper is drawn rearwardly removing the scraper proper from the material thus discharged. It will be noted that by reason of the rectangular opening 13 and therearward wall 12 of thescraper and that by reason of the inclined runners 60, the scraper n will readily ride over vany obstructions 'enf countered in its rearward movement.

@Whilefin' the above 'specification I have.

otedibottom'forsaid scraper, a lever fulcrumed onl said 4scraper yand operatively connected to said pivoted bott-cin, and means connected with said scraper and operatively connected with said lever for actuating said lever tov tilt said bottom about its pivot for dumping the contents of said scraper.

2. In combinati-onwith a scraper, of a bottom pivoted at its forward end to said scraper,

a lever fulcrumed on said scraper and operatively connected with the rear end of said bottom, and means secured to saidV scraper and operatively connected with ,said lever for actuating said bottomv about its pivot for dumping the contents of said scraper.

3. In combination with a scraper, of a bottom pivoted at its forward end to said scraper, a lever fulcrumed on said scraper and operatively connected with the rear end of said bottom, means secured to said scraper and operatively connected with said lever for actuating said bottom about its pivotfor dumping the contents of said scraper, and means for locking said bottom in its dumpedV position. f

4. In combination with a scraper, of a bottom pivoted at its forward end to said scraper, a lever fulcrumed on said scraper and operatively connected with the rear end of said bottom, means secured to said scraper and operatively connected with said lever for actuating said bottom about its pivot for dumping the contents of said scraper, and automaticallyk actuated means for locking said bottomin its dumped position.

5. In combination witha scraper, of a bot IDG ies

tom pivoted at its forward end to said scraper, a lever fulcrumed on said scraper and operatively connected with the rear end of said bottom, means secured to said scraper and operatively connected with said lever for actuating said bottom about its pivot for dumping tlie contents of said scraper, and automatically actuated means carried by said lever and engageable with said scraper for locking said bottom in its dumped position.

6. A scraper comprising` two longitudinally extending side walls and a rear transverse connection wall, a bottom pivoted at its forward end to the opposite sides of said side walls, a lever fulcrumed on the rear wall of said scraper and operatively connected to the rearward end of said bottom, and means connected to said scraper and operatively connected to said lever whereby said lever may be actuated to dump the contents of said scraper.

7 A scraper comprising two longitudinally extending side walls and a rear transverse connection wall terminating short of the bot tom of said scraper so as to form substantially a` rectangular opening on the rear end thereof, a bottom pivoted at its forward end on the opposite side walls of said scraper, said bottom having longitudinally extending sides and a transverse end, said transverse end extending'over the rectangular opening iii the rear end of said scraper, a lever fulcrumed on said scraper, operative connections connecting the forward end of said lever with said bottom, and means operatively connecting with the rear end of said lever for actuating said bottom about its pivot to dump the contents of said scraper.

8. In combination with a scraper, of a pivoted bottom for said scraper, a lever pivoted to said scraper and operatively connected to said bottom, means connected to vsaid scraper and operatively connected to said lever for actuating said lever to tilt said bottom for dumping the contents of said scraper, and means connected to said scraper and operatively connected with said lever for actuating said lever to return the bottom to its normal operative position.

9. A scraper comprising a box-like struc ture, a bottom pivoted at its forward end to said scraper, a lever fulcrumed on the rear end of said scraper and having its forward end operatively connected by a link to said bottom, a cable connected to the rear end of said scraper and operatively connected with the rear end of said lever for actuating said lever to tilt said bottom for dumping the contents of said scraper, and a draft connection connected with the forward end of said scraper and operatively connected to the rear end of said lever whereby said lever may be actuated for returning said bottom to its normal operative position.

10. A scraper comprising two longitudinally extending si'de walls and a transverse rear wall, a bottom pivoted to the side walls of said scraper, a cutting member positioned in advance of said bottom and pivoted to the side walls of said scraper, and means carried by said scraper for actuating said cutting member and said bottom about their pivots for dumping the contents of said scraper.

11. A scraper comprising two longitudinally extending side walls and a transverse rear wall, a bottom pivoted to the side walls of said scraper, a cutting member positioned in advance of said bottom and pivoted to the side walls of said scraper, and means carried by said scraper for simultaneously actuating said cutting member and said bottom about their pivots for dumping the contents of said scraper.

12. A scraper comprising two longitudinally extending side walls and a transverse rear wall, a bottom pivoted to the side walls of said scraper, a cutting member positioned in advance of said bottom and pivoted to the side walls of said scraper, and means pivoted on said scraper for simultaneously actuating said cutting member and said bottom about their pivots for dumping the contents of said scraper.

13. A scraperl comprising two longitudinally extending side walls and a transverse rear wall, a bottom pivoted to the opposite walls of said scraper, a cutting member positioned in advance of said bottom and pivoted at its forward end to the opposite sides of said bottom, and a lever fulcrumed on said scraper and operatively connected to said pivoted bottom' and cutting member whereby said pivotedbottom and cutting member are simultaneously actuated aboutv their pivots for dumping the contents of said scraper.

14,-. A scraper comprising two longitudinally extending side walls and a. transverse rear wall, a bottom pivoted to the opposite walls of said scraper, a cutting member positioned in advance of said bottom and pivoted at its forward end to tlie opposite sides of said scraper, a lever fulcrumed on the rear end of said scraper, operative connections connecting the forward end of said lever with said cutting member and bottom, and means connectedto the rear end of said lever for actuating said lever about its pivot to tilt said cutting member and bottom for dumping the contents of said scraper. Y l

15. A scraper comprising two longitudinally extending walls and a rear transverse connecting wall, a bottom pivoted at its forward end to the inside of the opposite walls of said scraper, a cutting member positioned in advance of saidv bottom and pivoted at its forward end to the opposite side walls, a lever fulcrumed on the rear end of said scraper, a link operatively connecting the forward end of said scraper with said bottom, a second link pivotally connected to the forward end of said lever, a third link pivoted to said scraper and having its free end pivotally connected to said second named'link and aV fourth link connected to the common pivot 0f said two last named links, said last named link operatively connected to said cutting member, and means operatively connected to the rear end of said'lever for actuat-v ing said lever totilt said cutting member and bottom about their pivots for dumping the contents of said scraper.

16. A scraper comprising two longitudi nally extending side walls and a' rear transverse connecting wall, a bottom pivotedV at its forward end between the side walls of said scraper, a cutting member positioned in ad-l member and bottom to theirnormal operative positions. j Y v 17 Ascraper comprising'two longitudinally extending side walls and a rear transverse connecting wall, a bottom pivoted" at itsvr forward end t0 the opposite side iwalls'fff said scraper, means for adjusting th'epivot off said bottom whereby the" angle of the bottom may be changed with respect to the scraper,

a cutting member positioned in advance of the bottom'and pivoted to the opposite side walls of said scraper, means wherebythe pivj ot of said cutting member may be adjusted so as to adjust the same longitudinally with respect to said bottom, and means'mounte'd on said scraper for simultaneously actuating said cutting member and bottom about their pivots for dumping the contents ofv said scraper. f

18. A scraper comprising two longitudinally extending side walls and a transverse rear wall so as tofform a box-like bottomless structure, a digging member pivote'd' at. a

point substantially midway of the ends of said side walls, a lever fulcrumed on the rear end of said scraper and having one end operatively connected to the rear end of said'digging member and ymeans operatively con-- nectedwith the rear endof Said lever whereby said lever may be actuated about its pivot for dumping the contents yof said scraper. 19. A bottomless scraper comprising two longitudinally extending side walls and Vatransverse rear wall, a digging member 'pivoted adjacent to lower edges of said opposite side walls, said digging member having ak of said diggingmember with the forwardend of said lever, and rearwardly extending drag n cables connected to the rear end of said scraper and operatively connected to the rear end of said lever whereby said lever maybe actuated to tilt-said digging member about its pivot for dumping the contents of said scraper. v

- f In witness of the foregoing I aiix myv signature.

LESLIE P. GREEN.

bottom positioned at an anglewith respect to the longitudinal edges of said side`walls aV lever fulcrumedon the rear end of said scraper, links operatively connectlng the rearend

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