US2380021A - Scraper - Google Patents

Description

July 10, 1945. A. J. BROWN ET AL U SCRAPER Filed April 21, 1943 2 Sheets-Sheet 1 m3 N Q m fin Q E E m\ w.\\ wm\wul 9w m .13 Silva July 10, 1945. A. J. BROWN ETAL SGRAPER Filed April 21, 1943 2 Sheets-Sheet 12 3mm 5.]..Brown N WWW Patented July 10, 1945 UNITED STATES PATENT orslcs semen Anthony J. Brown and Joseph B. Silva, Tux-leek, Calif Application April 21, 194:, Serial No. ssaaso Claims. (01. 37-129) This invention relates in general to improvements in a wheel supported scraper for earth working, and in particular the invention is directed to a carry-type scraper which includes a main bowl mounted for movement between digging, carrying, and dumping positions, and a front bowl or apron mounted for cooperation with said main bowl. I

One of the objects of this invention is to mount and actuate the main bowl ina novel manner whereby to accomplish ready and effective ad justment of said bowl between digging, carrying, and dumping positions; the actuating means including a pressure fluid-actuated power cylinder connected with the main bowl by a unique lever assembly.

A further object of the invention is to provide, in a scraper of the type described, a front bowl which is actuated entirely from the main bowl, 1. e. the front bowl is responsive to movement of the main bowl whereby the front bowl assumes diiierent operative positions corresponding to operative positions of the main bowl.

An additional object is to provide a scraper having a front bowl, as in the preceding paragraph, in which both the main bowl and front bowl are pivotally mounted for turning-motion about a transverse axis; the front bowl actuating means comprising transversely spaced arms which project in rigid relation rearwardly from the sides of the front bowl and seat in longitudinally sliding relation upon corresponding rollers mounted on the sides of the main bowl adjacent the upper edge thereof and relatively close to the front end thereof so that raising or lowering movement of the main bowl is correspondingly imparted to the front bowl.

It is also an object of this invention to provide a scraper of the type described wherein the wheels are mounted on the scraper frame to normally ride inwardly of the borders of the cut made by the main bowl, but which wheels are removably mounted so that they may be removed and remounted on the frame alongside the bowl for certain types of work, as for example levee construction where it is desirable to have the wheels adjacent the transverse plane of the cutting blade. Additionally, the front bowl is removable, as it is not needed when the scraper is used for levee construction or certain other work.

These objects we accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal'of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views:

Figure 1 is a plan view of the implement.

Figure 2 is a side elevation of the implement partly broken away, and illustrating the bowls in earth carrying position; the position of the wheels when .mounted alongside the main bowl being shown in broken lines.

Figure 3 is a sectional elevation of the imple-' ment showing the bowls in the position occupied by the same when the cutting blade of the main bowl is in digging position; the full dumping position of the main bowl being shown in broken lines.

Figure 4 is an enlarged fragmentary cross sec:

tion on line 4-4 of Fig. 8.

Referring now more particularlyto the characters of reference on the drawings, the scraper comprises a horizontally disposed substantially rectangular frame indicated generally at I, and which includes parallel, transversely spaced side beams 2, a front cross beam 3, and a rear cross beam 4. A draft tongue 5 projects longitudinally and forwardly in centered relation from the main frame, and at its forward end said tongue is fitted with a draft unit 6 which includes a vertically adjustable coupling element 1 which is adapted for connection in draft relation with a tractor.

The side beams 2 project at their rear ends some distance rearwardly of the cross beam 4, as at 8, and as clearly shown in Fig. 1. Ground engaging wheels 9, preferably rubber-tired, are disposed to the inside of V and are detachably mounted in connection with said rear end portions of the side beams 2 by means of attachment assemblies shown at l0, and which are arranged to permit of relative vertical adjustment of the wheels.

A main bowl II is disposed between the side beams 2 immediately ahead of the rear cr'oss beam 4, said main bowl being open at its forward end and including a bottom l2 fitted at its forward edge with a transversely extending cutting blade l3. Substantially centrally of its ends and adjacent its upper edge the bowl is formed with trunnions l4 which are joumaled in bearings ll secured atop the side beams 2, whereby the bowl is turnable about said trunnions between a carrying position, as shown in full lines in Fig. 2, various digging positions, one of which is shown in section in Fig. 3, and spreading and dumping positions; the full dumping position being shown in broken lines in said latter figure. a

The main bowl II is power-actuated between cylinder being disposed at a forward and downward incline relative to the lever l8 and pivotally connected at its forward end between upstanding ears 22 secured on the forward end of a center beam 23; the center beam 2: extending rearwardly to a termination adjacent and below the cross-shaft II. A stop 24 mounted on top of center beam 22 adjacent its rear end limits.

the forward throw of lever ll.

Adjacent its ends, but inwardly of the brackets l1 and side beams 2 the shaft I6 is rigidly fitted with depending radial levers 25 which are pivotally connected at their lowerends, as at 28, with corresponding links 21 which extend rearwanily to pivotal connection at their rear ends,

Y as'at 2|, with the sides 29 of the main bowl II a short distance above the bottom l2 and relatively close to the vertical plane of the cutting blade I3; and generally in a line between the blade and trunnions ll. When the bowl is in carrying position, lever ll is disposed at a rearward slope, while levers 2| are disposed at a relatively steep forward incline as shown in Fig. 1. The links 21 are then disposed at a slight downward incline tothe rear.

Stops 24:: on crossbeam l are positioned to engage levers 2i and limit forward movement thereof, or the corresponding rearward movernentoflever l8.

A front, rearwardly opening bowl or apron, indicated generally at 30 and which includes sides Ii and a bottom 82, is mounted in the main frame i in cooperating relation to the main bowl I I as follows:

At the front and some distance below its upper edge the front apron is formed with attachment ears II which are pivotally mounted on corresponding cross pins 34 removably secured in transversely spaced bearing sleeves 28 mounted in connection with the lower edge of front cross beam 2: the apron being turnable about pins 24 for movement responsive and corresponding to the movement of the main bowl between its several positions.

The sides II of the apron are formed at their upper edge with parallel rearwardly projecting arms 30 which slidably ride atop rollers 31 removably mounted on and laterally inwardly of the sides I! of the main bowl ii adjacent the upper edges thereof and in a plane substantially vertically alined with pivot points 2| of the links 21, and ahead of the trunnions II, when the bowls are in carrying position. If the bowls are relatively wide. they may be stiffened by central longitudinal gusset plates ll.

Operation In operation, the power cylinder II, which is double-acting, is connected by fittings II with conduits (not shown) which lead from a controlledsourceofpressure onthe tractor,asis conventional.

To move the bowl to a di in position. s

cylinder I! is actuated so as to retract the piston rod 20, causing lever It to swing forwardly, and levers 25 and links 21 to move rearwardly, tilting the main bowl II to said dig in position- W n the main bowl is moved to said position the arms 3. are relatively lowered, causing the front bowl a bi; lower to the position shown in section in Fig. a

After the bowls are filled with earth with advance of the implement, the power cylinder is is actuated to swing the lever ll rearwardly to the position shown in Fig. 2, whereupon the levers 2i and links 21 raise the main bowl to carrying position; upward movement of said bowl ahead of the trunnions ll causing a corresponding movement of the roller engaged arms 3| which swings the front bowl 3!! upwardly to carrying position, wherein the rear portion of said front bowl telescopes the forward portion of the main bowl to prevent earth escaping from this assembly of bowls.

At the desired point of dumpin the power cylinder I9 is actuated to cause the lever to be swung forwardly to the position shown in broken lines in Fig. 3, whereupon the main bowl swings downwardly through and rearwardly beyond digging position to either a spreading or full dumping position, the latter being shown in dotted lines in Fig. 3. As the bowl swings into spreading or dumping position the rollers 31 leave arms It, whereupon the front bowl, at its rear or lower edge, rests upon the ground, dragging thereover during the spreading or dumping operation. Upon return of the main bowl from dumping position to either digging or carrying position, the rollers 31 again pick up the arms 86.

For levee construction and certain other types of earth moving, it is desirable that the wheels I be removed from porflons I of the side beams and attached alongside the main bowl H, as shown in dotted lines in Fig. 1 and broken lines in Fig. 2. In order to accomplish this we provide attachment members Illa on the side beams and with which members the detachable portion ofhattachment assembles l0 matohingly coopera It is also desirable for levee construction orthe like that the front bowl be removed, and this is accomplished by withdrawing pins 34 and removing rollers l'l, which permits the front bowl to be detached from the implement. Under certain working conditions, as when constructing levees, it is desirable that the tuming motion of the main bowl I I be more rapid than otherwise, and to this end an additional hole I! is formed in lever l8 intermediate its ends and to which the clevis 2| may be attached. The structure of the implement as described makes the scraper useful for many different purposes and the actuating mechanism, while being quite simple, is effective to accomplish ready control of the parts of the scraper including accurate adjustment of the angle of the cutting blade for dig ing or spreading of earth.

From the foregoing description it will be readily seen that we have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the 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.

shown for example in section in Fig. 3, the power 76 Having thus described our invention, what we claim as new and useful and desire to secure by Letters Patent is:

1. In a scraper, a frame supported from the ground, a main forwardly open bowl, means pivoting the bowl intermediate its ends and adjacent the top for rotative movement between digging, carrying and dumping positions, a front bowl hung from the frame ahead of the bowl for free tilting movement'and tending to drop at its rear end, said front and main bowls being disposed to cooperate in closing relationship when the main bowl is in carrying position, means to control the rotation of the main bowl, an arm rigid with and projecting rearwardly from the front bowl and an element on the main bowl ahead of its pivot means slidably and disengageably supporting said arm when the main bowl is at or between digging and carrying positions.

2. In a scraper, a, frame supported from the ground, a main forwardly opening bowl pivotally suspended from the frame for swinging movement between carrying, digging, and dumping positions, said main bowl being pivoted so that its forwardly opening end moves downward as said bowl is tilted from carrying to digging position, a front rearwardly opening bowl pivotally suspended from the frame ahead of the main bowl, said front bowl being pivoted ahead of its open rear end so that such end tends to swing downward about said pivot, means to control rotative movement of the main bowl, the main and front bowls being disposed to cooperate in closing relationship when the main bowl is in carrying position, and means responsive to mainbowl movement between carrying and digging positions to automatically effect a corresponding movement of the front bowl; said last named means being automatically disengaged upon movement of the main bowl to dumping position whereby, when dumping, the main bowl is free of the front bowl.

3. In a scraper, a frame supported from the ground, a main forwardly opening bowl pivotally suspended from the frame for swinging movement between carrying, digging, and dumping positions, said main bowl being pivoted so that its forwardly opening end moves downward as said bowl is tilted from carrying to digging position, a front rearwardly opening bowl pivotally suspended from the frame ahead of the main bowl, said front bowl being pivoted ahead of its open rear end so that such end tends to swing downward about said pivot, means to control rotative movement of the main bowl, the main and front bowls being disposed to cooperate in closing relationship when the main bowlis in carrying position, and means responsive to main-vbowl movement between carrying and digging positions to automatically effect a cor responding movement of the front bowl; said last named means comprising an arm projecting in rigid relation rearwardly from the front bowl, and a supporting element on the main bowl slidably supporting said arm when the bowl is in carrying or digging positions whereby upon predetermined rotating movement of the main bowl between said positions with resultant raising or lowering of said element, the arm and front bowl follow with a corresponding movement.

4. In a scraper, a frame supported from the ground, a main forwardly opening bowl pivotally suspended from the frame for swinging movement between carrying, digging, and dumping positions, said main bowl being pivoted so that its forwardly opening end moves downward as said bowl is tilted from carrying to digging position, a front rearwardly opening bowl. pivotally suspended from the frame ahead of the main bowl, said front bowl being pivoted ahead of its open rear end so that such end tends to swing downward about said pivot, meansto control rotative movement of the main bowl, the main and front bowls being disposed to cooperate in closing relationship when the main bowl is in carrying position, and means responsive to main-bowl movement between carrying and digging positions toautomatically effect a corresponding movement of the front bowl; said last named means comprising a pair of transversely spaced arms projecting in rigid relation rearwardly fromthe sides of the front bowl adjacent the upper edges thereof, the rear end portions of said arms extending in adjacent overlapping relation to the sides of the main bowl when the latter is in carrying or digging position, and arm supporting rollers mounted on the sides of the main bowl adjacent their uption, a front rearwardly opening bowl pivotally suspended from the frame ahead of the main bowl, said front bowl being pivoted ahead of its open rear end so that such end tends to swing downward about said pivot, means to control rotative movement of the main bowl, the main and front bowls being disposed to cooperate in closing relationship when the main bowl is in carrying position, and disengageable means between the bowls to control the movement of the front bowl with movement of the main bowl between digging and carrying positions and disengaging the front bowl upon movement of the main bowl between carrying and dumping positions.

ANTHONY J. BROWN. JOSEPH B. SILVA.

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