Патент USA US2131421код для вставки
Sept. 27, 1938. 2,131,421 w. J; ADAMS )SGRAPER Filed March v23, 1936 ‘ INVENTOR. W J.Ada,1n.s .mm ‘ ATTORNEY Patented Sept. 27, 1938 2,131,421 UNITED STATES PATENT OFFICEl 2,131,421 scasraa William Joseph Adams, Santa Cruz, 'oaua, as signor to W. J. Adams, Inc., Stockton, Calif., a corporation ’ Application March 23, 1938, Serial No. ‘70,218 ~ 6 Claims. This invention relates to scrapers, and partic rear end on a cross member 2 extending between ularly to the scraper shown in my Patent No. the frame‘ beams. 2,010,801, dated August 13, 1935. The side plates 3 of the, main bowl terminate in a plane adjacent the scraping blade 4 of said This scraper includes main and auxiliary bowls, 5 the latter being mounted in front of and in con nection with the main bowl in such a manner that while the dirt supporting plate of the auxiliary bowl is above and spaced from the main bowl while the latter is digging, the adjacent ends of 10 the bottom plates of the bowls meet each other. when the main bowl is raised to a carrying posi tion. In the previous scraper, the side plates of the auxiliary bowl, while extending rearwardly some 15 distance from the rear edge of. the bottom plate thereof to overlap the sides of themain bowl, . bowl. This avoids the wear on the forward por tions of theside plates as when they extend for- ' wardly from the blade some distance and must also dig into the ground, as is the case in some scrapers. . The auxiliary bowl A is also disposed between I, the side frame beams, and is supported at its forward end from side beams for combined swivel and longitudinal movement relative thereto, by rollers 5 riding-on the beam tracks T substantially as in the previous device. - The side plates 3 of the main bowl B inter- ' break upwardly from said bottom'plate. 'An open mediate their ends are provided with substan space above ground was thus-formed ahead of the tially' vertical rows of bolt holes 6, while the side _ main bowl between the overlapping plates. when plates ‘I of the auxiliary bowl A are provided with similar rows of holes 8. When the main bowl B " and the auxiliary bowl A are in what may be termed closed position, i. e. when the co-operating 20 working in light or sandy dirt this space allowed. considerable dirt as pushed up by the- advancing blade, to escape past the sides of the main bowl, and the ei?ciency of operation in dirt of this character was correspondingly lessened. i (0]. 37-429) ‘ It is therefore the object of this'invention to overcome this defect by arranging the side plates of the auxiliary bowl so that this dirt'eescape space is practically eliminated, thus positively con?ning all the dirt as scraped wltliinthe con edges of these bowls lie in substantially contacting relation, the rows of holes 8 are in register with the adjacent rows of holes 8. A bolt l0, provided for each side of the scraper, may be inserted in corresponding pairs of holes-to pivotally connect the overlapping plates together. By moving these bolts ill from one set of holes ?nes of the side plates. -At the same time, the ' to the other, the extent of the forward movement cost of construction of the scraper is increased of the inner edge of the apron relative to the cut but little if any. " ' I have also provided an improved form of cut ting blade for the scraper, which prevents adher l ing of sticky dirt to the blade so that the; bowl loads more easily and with less resistance when working in dirt of that character, and by eliminat ing the mound of dirt adhered to and built up across the blade, aids in the ready-and complete dumping of the load. The above objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following speci?cation and claims. 45 .The ?gure on the drawing is a sectional eleva tion of my improved scraper, showing the aux iliary bowl as set for operating in light dirt and with the main bowl in a scraping position. 50 Referring now more particularly 'to the char acters of reference on the-drawing, the scraper as ting edge of the bowl when the latter is tilted to scraping position, may be altered. When the bolts iii are in the topmost holes, the forward movement will‘be greatest and will be the least , when the bolts are in the lowermost holes and in termediate movement may be had by placing the bolts in the intermediate holes. The greatest for ward position has been found preferable when the scraper is operating in loose dry earth such 40 as dry sandy soils. When the bowls are disposed in this relative position the inner edge of the bot tom plate 9 of the auxiliary bowl A is consider ably forward of the cutting edge of the main bowl B and above the ground. . ' In the structure of the former patent this left an objectionable opening between the bottom edge of the side plates 1 and thesround inter mediate the edges of the main and auxiliary bowls. In scraping through loose dirt, therefore, a considerable portion of the scraped dirt would before comprises [a wheel supported frame which _ have the tendency to ?ow out of these openings includes spaced side beams, one of which is shown instead of moving into the bowl. This materially at I. The main bowl B is disposedbetween the lessened the eillclency of the scraper. 55 beams and is pivotally mounted at the bottom and To overcome this latter objection, I therefore ‘ 2 2,131,421 conceived of the projection of the lower edge of the side, plates 1 rearwardly of the plate 9 on herence of the column to the face of the blade and has the tendency to break up the solidarity of the column which then is further broken up furthest apart, the lower edges of such plates 1 by its movement over the curved ridge l3. The will extend substantially to the level of the column being thus broken up, the dirt tends to 5 ground as at II at the lowest point of overlap roll or flow into the bowl B more like loose earth of the plates of the two bowls; said lower edges ' does. The ease of loading sticky dirt is thereby being substantially parallel to the rear end por increased, and the power necessary to load the tions of the top edges of said plates. scraper with such dirt is materially lessened. 10 ' In this manner, a closure with the ground and From the foregoing description it will be read- 10 with the side plates 3 is provided immediately ily seen that I have produced such a device as such a line that when the edges of the bowls are ahead of the plates 3 and ‘blade 4; which prevents substantially ful?lls the objects of the invention the escape of the dirt outwardly of and past the 4 as set forth herein. sides-of the main bowl as such dirt is crowded ; > up by the scraping action, as was previously the case. If the auxiliary bowl is lowered at its front end by adjustment of the supporting rollers 5, the rear end of the bottom plate 9 will be close to the ground, and said dirt enclosing function I of the side plate extensions will be practically unbroken from the plates 3 to the bottom plate 9. Even if the bolts I 0 are set in the lowermost While this speci?cation sets forth in detail the present and preferred construction of the 15 device, still in practice such deviations from such detail may be resorted to as do not form a de parture from the spirit of the invention, as de ?ned by the appended claims. Having thus described my invention what I 20 claim as néw and useful and desire to secure by ' Letters Patent is: . holes 6-8 thus bringing the edge of the bottom 9 closer to the edge of the scraper bowl when the 25 latter is in digging position, as shown by dotted lines in the drawing, the side plate extensions II will still be held from materially projecting into the ground during the digging operation. 1. In a scraper, main and auxiliary bowls, the latter being in front of the former, the main bowl including side plates and a scraping blade 25 disposed adjacent the forward end of the side This avoids extended wear on these extended from and overlapping the side plates of the main bowl outwardly thereof, and means connecting 30 the overlapping portions of the plates together so that when the blade is in digging position below ' edges. plates and the auxiliary bowl comprising a bottom plate and side plates projecting rearwardly there— To facilitate the operation of the mechanism arranged as above described, I have also relo cated the apron supporting rollers 5 from points near the forward end of the auxiliary bowl A, as shown in the patent, to points substantially mid way between the ends of such auxiliary bowl as shown in the present drawing. This relocation of these rollers constitutes a vital improvement ground level the rear end of the bottom plate is above ground level and’spaced in front of the blade, the side plates of the auxiliary bowl being 35 over the previous structure in that it changes the bowl from a point adjacent and below the rear arc of the opening movement of the auxiliary apron and causes it to have' a much faster open ing and closing‘ action and to open much wider relative to the scraping edge of the main bowl when the latter is in scraping position, than-is ‘ ; the case when the rollers are located near the ' front end of the auxiliary bowl, as shown in the patent. - - The blade 4 is concavely curved, and is sup ported ‘and bolted on the similarly curvedface of a transversely extending cast shoe l2, which forms the base supportfor such scraping blade. This shoe or scraping blade support is disposed under and extends ahead of the bottom plate of the main bowl, being welded or otherwise rigidly secured thereto. The upper edge of the blade is spaced ahead of the forward end of the bottom plate; the shoe at the top, between the blade and plate, being formed with a convex ridge l3 which ex 60 tends above the level of the bottom plate. The forward side of the ridge merges into the forward surface of the blade as shown, so as to provide a smootlr surface for the movement of the dirt, and to form an abutment for the upper edge of 65 the blade, relieving the holding bolts of the blade of shearing strains. . When a scraper is cutting through sticky soil the latter tends to move into the bowl in a solid column-like formation. Where‘a ?at scraping blade is used this sticky solid column tends to ad here to the face of the blade and the bottom of the bowl. This materially increases the power necessary to force the column into the bowl. With the blade curved however, as disclosed in a ‘this application, such curvature prevents'the ad arranged to then form a substantial closure with -. the ground between the bottom plate of the auxiliary. bowl and the side plates of the main end of said bottom plate. _ 40 2. In a scraper, a tiltable main bowl, an auxil iary bowl in front of the main bowl, said main bowl including side plates and a scraper blade disposed adjacent the forward end of the side plates and the auxiliary bowl including a bottom 45 plate and side plates outwardly overlapping’ the ‘ side plates of the main bowl, means pivotally connecting the overlapping side plates together above the bottom thereof in position to cause the rear'edge of the bottom plate to engage the blade 50 when the bowls. are in transporting position, and , means functioning with-the tilting of the main bowl to a digging position with the blade below ground level to cause the bottom plate to remain above ground level in an advanced position rela- 55 tive to the blade; the side plates of the auxiliary bowl being, formed to then extend rearwardly from the bottom plate adjacent ground level ‘from a point adjacent and below the rear end of said bottom plate and a sufficient distance to 60 overlap the side plates of the main bowl adjacent ground level. ‘ 3. In a. scraper, a tiltable main bowl, an auxil iary bowl in front of the main bowl, said main bowl including side plates and a scraper blade 65 disposed ‘adjacent the forward end of the side plates and the auxiliary bowl including a bottom plate and side plates outwardly overlapping the side plates of the main bowl, means pivotally connecting the overlapping side ‘plates- together1 70 above the bottom thereof in position to cause the rear edge of the bottom plate to engage the blade when the bowls are in transporting position, and means functioning with the tilting of the main bowl to a digging position with the blade below 75 9,131,421 10 15 20 25 3 ground level to cause the bottom plate to remain ya. scraping blade disposed adjacent the forward above ground level in an advanced position rela ends of such side plates, the auxiliary bowl in tive to the blade; the side plates of the auxiliary cluding a bottom plate the rear end of which is bowl being formed so that the bottom edges there disposed above and some distance in front of the of are then disposed on a level below the rear blade when the latter is in scraping position, and end of the bottom plate and extend adjacent side plates on- said auxiliary bowl pivotally ground level from a point some distance ahead mounted to the side plates of the main bowl and of said end of the bottom plate to a termination overlapping the same at substantially ground rearwardly of the forward end of the side plates level when the main bowl is in scraping posi of the main bowl. tion and extending thence forwardly at substan 10 4. A scraper comprising tiltable main and aux-v tially said level to a point ahead of and belo iliary bowls, the latter being disposed in front the rear end of the bottom plate. _' , ‘ of the former, the main bowl including side plates - 6. A scraper comprising tiltable main and aux and a scraping blade disposed adjacent the for iliary bowls, the latter’being disposed in front of ward ends of such side plates, the auxiliary bowl the former,’ the main bowl including side plates 15 including a bottom plate the rear end of which is and a scraping blade disposed adjacent the for disposed‘ above and some distance in front of the ward ends of such side plates, the auxiliary bowl blade when the latter is in scraping position, including a bottom plate the rear end of which and side plates on the auxiliary bowl pivotally is disposed above and some distance in front of mounted on the side plates of the main bowl the blade when the latter is in scraping position, 20 and overlapping the outside of the same at sub and side plates on the auxiliary bowl overlapping stantially ground level when the main bowl is in the outside of the side plates of the main bowl scraping position and extending thence forward- , at substantially ground level when the main bowl ly at substantially said level to a point ahead is in scraping position and extending thence for of and below the rear end of the bottom plate. wardly at substantiallyv said level to a point ahead 25 5. A scraper comprising main and auxiliary of and below the rear end of the bottom plate. bowls, the latter being disposed in front of the former, the main bowl including side plates and WILLIAM JOSEPH ADAMS.