US1889722A - Road grader - Google Patents

Description

ZShQQtS-Sheet T. P. WRIGHT ROAD GBADER Filed Jan. 18, 1932 Nov. 29, 19 32 w w w w V BY M ATTORNEY wnnsss:

New. 29, 1932. T. P. wRiGHT ROAD GRADER Filed Jan. 18, 1932 2 Sheets-Sheet 2 Patented Nov. 29, 1932 UNITED STATES PATENT OFFICE THOMAS P. wnrenn or ATLANTA, GEORGIA, nssrenoa ro MeL riwHnEr. 'ROAID MACHINE COMPANY, me,- or ATLANTA, enoaem, A CORPORATION or enonera ROAD enhnnr.

Applicationfiled January 18, 1932. Serial No. 531 113. I

The invention relat es toa road grader the provision of a machine ofthis character 1 wherein the same possesses considerable weight and is of considerable length, being supported upon SlX pans of. wheels, onepair 10 of these being vertically adjustable so that when these wheels are lowered all the other wheels except the front pair are moved off the surface which enables the machine to be H readily turned aroundand to cross bridges, tracks and the like withthe scraper blade in inoperative position;

Another object of the invention is the provision of a machine of this character wherein the construction thereof is novel in form and 29 is equipped with a laterally ustable tongue which can be set at an angle, while the scrap ing blade is adjustable in a novel manner,

A further objectof theinvention is the provision of. a machine of this character which is extremely simple in construction thoroughly reliableand eflicient in its purpose, strong,

durable, readily and easily adjusted, and in-' expensive tomanufacture. n With these and other objects'in view, the' O invention consists in the features or construction, combination and arrangement of parts as will be hereinafter more fully described in detail, illustrated in theaccompanying drawings, which'disclose the preon the line 33 of Figure 1 looking in the direction of the arrows. I

Figure 4 is a detail sectional view showing v how the front wheels are swiveled to the frame.

Figure 5 is a sectional'view on the line 55 of Figure 1.

Figure 6 is a fragmentary vertical sectional view showing in detail themanner of adj usting the scraping blade. 7

Figure 3 is a fragmentary sectional view.

spending parts throu in'the drawings. 1

Referring to'the drawings in detail, A designates generally the frame of themachine' which is composed of heavy material Similar reference characters indicate correghout the several views and strengthened by cross pieces land the braces 2. The braces Q-are angularly disposed and cross each other at the longltudi nal center line of the frame A. The frame A is of considerable length and is supported by six sets or pairs of wheels 3, the front wheels 3 being swiveled to the front of the framerasshown at 1 in Figure & ofthe drawmgs. V v a I A shaft 5 is journaled in the frame an appreciable distance from the center thereof and to the rear of the frame and this shaft is formed with crank ends 6 which are located beyond the sides ofthe frame, the extremities of the cranks forming. journals for the large wheels 7. Thus by partly rotating theshaft in one direction the wheels 7 will be lowered to engage the ground or road surface and thuslift the frame A so that allthe wheels 3 will be lifted offthexground with the exception ofthe' front wheels 3. When the tion the=wheels7 will be lifted so that the wheels 3'wil1 contact the road surface. A

lever Sis connected with'theshaft 5 and a cable 9 extends from the upper end of the lever to a drum 1O journale'd in the front of the frame A and the axle of said drum'is connected by the gears 11 to a shaft 12 which is provided "with a hand wheel 13 arranged at a point where the operator can readily reach the samefor manipulation thereof.

The scraper blade 14 is adjustably connected in anysuitable manner to the holder 15 which'is raised and lowered by the; screw shafts 16 l1aving the hand wheelsfli connected to their upper ends. Eachofthe screw shafts 16 is mounted in a bearing memher '18 disposed crosswise ofthe frame A and the said shaft carries jamb nuts 19 which coact with the. bearing 18on adjustment for takin out all vertical play-to the blade 14L by locking the rotation'of the screw shaft 16. a V The blade carrier slidably fits within castings arranged on the side sills of the frame A and these castings are designed to hold the carrier in vertical position and to permit free movement when adjusting up or down. Formed on the carrier adj acent to the connection of each shaft 16 therewith is an ear 21 to which is pivoted at 22a swinging 23, the same being pivoted 24 to 'a thrust casting 25 and this arm acts to shove blade let ahead instead of pulling upon the same and by such mounting of the carrier eliminates vibration of blade and throws the weight of the machine onto the blade at all times when cutting.

WVhen the blade is properly adjusted it will not be necessary to change the same for a long time as the construction of the machine enables the blade to do its work without the help of a man to adjust the same.

The length of the machine is quite an asset and makes it possible for the machine to do excellent work, as by making the machine of 7 considerable. length and supportingit by the six sets or pairs of wheels, the blade 'l i is 2;: held out of low places and is not permitted to go too deep in high places. By using a plurality of wheels the machine is kept out of holes and at the same time the blade is prevented from cutting too deep. By mak- 39 ing the machine of-considerable weight the blade will cut the road surface regardless of small obstacles and the roughness of the road and the blade will cut smoothly and only where needed. By lowering the wheels 3;? 7 the major portion of the machine islifted from the ground so that the machine can be readily turnedaround and can crossbridges, tracks and the like without obstruction."

At the front endof the frame'A is ar-- 49 ranged a quadrant 26, the ends of which are horizontally pivoted at 27 so that said quadrant will havefree vertical movement while; mounted centrally of the forward end ofthe frame. A is a coupling 28 for a laterally swinging tongue 29, this being the draft tongue and being susceptible of lateral augu lar adjustment upon the quadrant 26, the lat ter being formed with spaced holes 30 and r0 likewise the tongue has a hole 31' for registration with the holes 30 and these lastadjustably accommodate a .pin 32 so that the tongue 29 can be fastened in its adjusted position. The quadrant 26 near opposite ends is formed with stops 33 which limit the lateral swinging of the tongue. The tongue is swung against either of the stops 83 when it is'desired to make a sharp turn either right or lefta i g The forward corner portion of the frame A, has fitted therein tension rods 3a, which serve to transfer pull of tractor-of the] frame of A the machine,these rods being disposed'in a forwardlybonvergent relation to each-other, wd' js fi eeiwt m h oeee eifi in the scope of the frame close to opposite sides of the coupling 28.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is .to be understood that changes may be madein theconstruction andin the combination and 1 arrangement of the several parts, provided that such changes fall withappended claims. 7 What is claimed is i i 1. A road grading machine comprising a frame of considerable weight and length, a

plurality of pairs of wheels for supporting the frame, means for sWivelling the front wheels to the frame, a blade carried by the frame, a pair of extra wheels located rearwardly of the central part of the frame, and means for raising and lowering the said wheels, said extra pair of wheels, when 10w ered, lifting the framewith all but the front pair of wheels oh the ground.

' 2. A road grading. machine comprising a frame, a plurality of pairs of wheels for supporting the frame, means for swiveling the front wheels to the frame, a blade carried by the frame, 'a pair of extra wheels located rearwardly of the central part of the frame, said extra pair of wheels when lowered lifting the frame with all'but the front pair of wheels'oif the ground, a shaft journaled in the frame and having crank ends to. which the extra p'air 'of' wheels is. connected, and means for rocking the shaft from the front end of the machine; j 7' f 3. A road grading machine comprising a frame of considerable weight and. length, a plurality of pairs of wheels'for supporting the'frame, means for. swivelling the front wheels to the frame, a blade carried the frame, a pair of extra wheels located rearwardly of'the'central part of the frame, means for raising and lowering the said wheels, saidextra pair of wheels, when lowered, lifting the frame with all but the front pair of wheels ofi the ground, a'blade car rier fitted within the framejfor vertical sliding movement, [and arms pivoted in the frame andto the ca'rrier to exert a forward thrust totheblade carrier." i In testimon'y whereof Iaflix my signature.

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