US2309750A - Earth mover - Google Patents

Description

2 Sheets-Sheet l Feb. 2, 1943. G. E. cARRlNG-roN EARTH MOVERl File'd Sept. 22, 1941 A INVENTOR. G50/wf f. @ARAP/Gram ATTORNEY.

Feb. 2, 1943. G. E. cARRlNG-roN 2,309,750

EARTH MOVER Filed sept. 22, 1941 l2 sheets-sheet 2 G INVENTOR. fwof .Omi/Gram jig BY MAX Patented Feb. 2, 1943 UNITED STATES PATENTOFFICE This invention relates to an earth moving and grading attachment for tractors and has for its Y principal object the provision of a simple, compact, and eflicient earth moving attachment which can be quickly attached to a 'tractor for leveling or terracing or banking earth which can be accurately and easily controlled from the operators position on the tractor.

Another object of the invention is to provide a terracing or grading attachment of this type in which the grading blade can be inclined upwardly at either side of the tractor and can return along an inclined terrace or bank and continue grading the incline when traveling in either direction.

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and eiliciency. These will become more apparent from the following description.

In the following detailed description of the invention reference is had to the accompanying drawings which form a part hereof. Like numerals refer to like parts in all views of the drawings and throughout the description.

In the drawings:

Fig. l is a, rear view of a typical tractor of the Ford" type illustrating the invention in place thereon and arranged for grading an inclined terrace or bank;

Fig. 2 is a cross sectional view of the tractor, illustrating the invention in side elevation;

Fig. 3 is a. plan view of the improved earth moving and grading attachment;

Fig. 4 is a side view thereof;

Fig. 5 is a detail view, illustrating the angle latch employed in the attachment; and

Fig. 6 is a detail sectional view of the connection between the tension arms and the attachment.

In the drawings a typical Fordson" tractor is illustrated at I0, its wheels at Il, transmission housing at I2, draw bar lugs at I3, tension links at I4, and hydraulic lifter arms at I5. The standard tension links carry socket balls 48 in their extremities.

In such a tractor, the lifter arms I5 are rotated upwardly by means of a hydraulic piston incorporated in the tractor. Such a tractor is provided with a compression rocking member I6 acting against a compression spring I1. The invention is designed to make use of the above standard parts of the tractor.

The improved attachment comprises a longitudinal frame member I8 to which a cross bar I9 is attached. A pair of upstanding lugs 2l arisgcw from the opposite sides of the cross member I The legs of an A-shaped standard 20 are secured between each pair of lugs and rise vertically above the cross member I9 being braced in the vertical position thereon by means of diagonal brace members 22.

through the legs of the standard 20 which are positioned therebetween. These .bolts project outwardly at each side of each pair of lugs and extend through the socket balls 48 in the rear extremities of the two tension links I4.` The balls member I6 and extends rearwardly to receive-fi the forward extremity of a rig-ht and left jackl screw 26. The jack screw is provided with a convenient hand wheel 2l by means of which it may be rotated. The rear extremity of the jack screw 26 enters a threaded sleeve 28 which is pivoted in the upper extremity of the standard 20 upon a' suitable pivot bolt 29.

The tension links I4 are suspended from the` rearextremities of the lifter arms I5 by means of a right and left threaded shaft 30. The shaft 30 is threaded at its lower extremity into a socket ymember 3l which is hinged to the links I4 on a suitable hinge bolt 32. The upper extremity of the threaded shaft 30 passes through a threaded sleeve 33 and terminates in a hand crank 34. The sleeves 33 are hingedly mounted on suitable i hinge pins 35 on the extremities of the lifter arms I5.

The rear extremity of the frame member I8" terminates in a. pivot bolt 36 by means of which a blade bracket 3l is pivotally secured thereto. The blade casting is bolted to the middle of a mold board 38, the lower edge of which is provided with a removable scraper blade 39.

The mold board and scraper blade are maintained at any desired angle with reference to the frame member I8 by means of an arcuate brace bar 40 which is secured at each of its extremities to a bracket 4I adjacent the extremities of the mold board 38. The arcuate brace bar 40 rides upon the forward extremity of the frame member IIii where it passes through a yoke 42 which maintains it in place thereon.

'I'he brace bar 40 is adjustable in the yoke 42 and is maintained in any desired circumferential position therein by means of a latch bolt 43 which enters any desired one of a series of A bolt 23 passes through the two lugs 2| and 'I For such a purpose he wishes the right extremity of the blade to be positioned forward of the'left side. To change the angle of the blade he rotates the left crank to force the left end of the blade against the ground. He then releases the latch bolt 43 and drives the tractor forward to swing the blade forwardly on the right side. When the proper angle is reached, he releases the bolt 43 into one of the perforations 44. He now rotates the right hand crank 34 to force the blade 39 downwardly and rotates the left hand crank in the opposite direction to lift the blade upwardly. This tilts the entire attachment downwardly to the right with the right extremity of the blade forward of the left extremity thereof. He now drives along the terrace banking the earth to the right.

When the end of'the terrace is reached, the operator releases the latch bolt 43 while the tractor continues forward this throws the left end of the 4mold board and blade forward to a position opposite its former position where it is again locked by the latch bolt 43. He now, by means of the cranks 34 raises the right end of the mold board and lowers the left end and returns along the terrace in the opposite direction.

The depth of cut is regulated by adjusting the hand wheel 21. The blade is completely lifted from the ground when turning or when not in use by operation of the hydraulic lift of the tractor which swings the rearward extremities of the arms l5 upwardly to swing the tension links I4 to an upward angle.

While a specic form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent l. An earth moving attachment for tractors comprising: a cross bar positioned transversely of the line of travel; a frame member extending forwardly and rearwardly of the mid-portion of said cross bar; a. vertical pivot bolt at the rear extremity of said frame members; a scraper blade pivotally mounted at its middle in said pivot bolt and extending transversely of said frame member; a semi-circular brace bar secured at its extremities to said blade and extending forwardly thereof; a yoke member on the forward extremity of said frame slidably receiving said brace bar; means for locking said brace bar in said yoke; a tension link extending forwardly from said cross bar at each side of said frame member for hinged connection to a tractor; a standard arising from the middle of said cross bar; a jack screw device extending forwardly from the upper extremity of said standard for connection to said tractor; and an extensible suspension shaft extending forwardly and upwardly from each tension link for connection to said tractor so that variation of the length of said jack screw will tilt the scraper blade forwardly and backwardly and so that relative variation of the length ofthe extensible shafts will raise or lower the extremities of said blade to tilt the latter.

2. An earth moving attachment for tractors comprising: across bar positioned transversely of the line of travel; a frame member extending forwardly and rearwardly of the mid-portion of said cross bar; a vertical pivot bolt at the rear extremity of said frame member; a scraper blade pivotally mounted at its middle on said pivot bolt and extending transversely of said frame member; a semi-circular brace bar secured at its extremities to said blade and extending'forwardly thereof; a yoke member on the forward extremity of said frame slidably 'receiving said brace bar; means for locking said brace bar in said yoke; a tension link extending forwardly from said cross bar at each side of said frame member for hinged connection to a tractor; a standard arising from the middle of said cross bar; a jack screw device extending forwardly from the upper extremity of said standard for connection to said tractor; an extensible suspensionshaft extending forwardly and upwardly from each tension link for connection to said tractor so that variation of the length of said jack screw will tilt the scraper blade forwardly and backwardly and so that relative variation of the length of the extensible shafts will raise or lower the extremities of said blade to tilt the latter; and universally moveable hinges between said tension links and the blade to allow the latter to tilt in all directions.

' GEORGE E. CARRINGTON.

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