US2335156A - Wheelless four-tools-in-one disk implement - Google Patents

Description

' WHEELLESS FOUR-TOOLS-IN-ONE DISK IMPLEMENT Filed Feb. 1s, 1942 Y s sheets-sheet 1 Y f l Z0 ./O 30* 27 w 6) f@ 26 30 u g5 32 n nn,... L ,A 'l y 2b K mf? ila" 30 l I .hc 50 7i 35? 52 `3/ v .37v I N 5/ a/ l,

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IN VENTOR.

Non 23, 1943. l l w F MCMAHON 2,335,156

WHEELLESS FOURTOOLSINONE DISK IMPLEMENT Filed Febf `1:5, '1942 1 s sheets-sheet 2 "d" "e" if" 2? 5o INVENTQR,A

Nov. 23, 1943. w. F. lMQMAHON 2,335,156

WHEELLESS FOUR-TOOLS-IN-ON DISK IMPLEMENT n Filed Feb. 1s, 1942 y s sheets-shears INVENT R.

Patented Nov. 23, 1943 WHEELLEss `Form-'roots1N-ONE msx IMPLEMENT WilliamA Frederick McMahon, Riverside, Calif. n Application February 13, 1942, Serial No. 430,768 Y u f 9 claims. (ci. 55-73) t My invention relates to disk harrows and more v particularly to a wheelless four-inone disk implement constructed to perform the function of harrowing, ridging, furrowing and ditching.

Heretofore all disk harrows werermounted on i wheels made an integral part ofthe disk harrow itself in order to provide means for adjusting the depth of penetration of the disks therein. or in the event the disk harrow was not so mounted on wheels then the entire weight of the latter construction came upon the very soil it was cultivating and said weight caused a plowsole or hard-pan to form.- These heretofore disk harrows were very ineftlclentconstructions because they served to pack underneath the very soil they were cultivating on top. In the 'former mentioned construction, mounted on wheels, heavy and complicated adjusting mechanisms had to be resorted to and made an integral part of the' disk harrow itself. This heavy adjusting mechanism obviously added weight to the respective heretofore disk harrows and increased the hardness of the plow-sole. Obviously, both of these heretofore types of construction were drawn by tractors having wheels but they were not constructed to be carried on the wheels of the tractors. My improved disk harrow is constructed so that its weight is carried on the wheels of the tractor which draws it and a new result, the elimination of the mentioned hard-pan or plow-sole, is provided thereby. I will hereafter use the term wheel-less" i to distinguish my improvement with its new result from that which was formerly used. .All4

heretofore disk narrows, having wheels made an integral part thereof, regulated the depth of these disk implements require individual mounted disks in the harrow that they are converted from and no heretofore` disk harrow` had individual mounted disks.

Itis an object, of this improvement, to provide a simple single construction unit which can be used to perform the work heretofore done by four or more disk' implements. l

It is also an object of this improvement to provide a single disk unit capable of doing the work of furrowing, ridging, ditchingand harrowing.

It is also an object ofthis improvement to 'provide a disk implement comprising parts constructed to form a disk harrow and then, with noV extraY parts. it can'quickly be made into either a, ridger or a furrower or a ditcher and Aquickly reconverted into either of the iour said implements. Y Y

A further object is to provide an efficient soil cultivating disk implement for use in orchard, field and vineyard work.

A further object is to provide a wheel-less disk implement with a close-up hitch connected to al simplified hooking and power lift, adapted to provides-even controlled soil penetration at any desired depth with least draft.

penetration of their disks in direct relationship with their said wheels and independent of the tractor wheels whereas, I regulate the depth of penetration of my disks in direct relationship with the tractor wheels and by so doing create my new result above mentioned. My improvement further resides solely in disk harrows hav--` ing two parallel opposed gangs of-disks and the conception of utilizing my respective disk harrow construction to do the work of ridging, middlebusting, iurrowing and ditching without having to resort to extra elements from those used in the basic disk harrow and without departure from the basic mode of operation thereof and new result above mentioned.

`Without my disk harrow construction of two parallel gangs of opposed disks I obviously could not convert the harrow into a furrower or a ridger or a middle-buster or a ditcher because and novel combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended, it being understood that various `changes in the form, proportion, design, size and details of construction may be resorted to by those skilled in the art without departure from the spirit or intent of this invention.

Similar characters of referencedenote like or correspondingparts throughout the several gures of the accompanying drawings forming a part of this specification and upon which;

Figure `1 is a plan view of the disk implement arranged as a disk harrow.

Figure 2 is a. plan View of the same disk implement arranged as a disk furrower.

Figure 3 is a plan view ofthe same diskimplement arranged as a `disk ridger.

Figure 4 is a plan view of the same disk implement arranged as a disk ditcher.

Figure is a longitudinal side elevation showing the disk implement penetrated into'the soil and the particular lifting linkage system and its method of connection with a. tractor.

Figure 6 is a similar longitudinal elevation showing the disk implement raised out of the soil andthe position of the lifting linkage system in this operation.

Figure 7 is a sectional elevation through the disk bearingassembly.

Referring in 4detail to the characters of refery ence marked upon the drawings,`8 represents a Vconventional tractor having a conventional power take-off shaft 9. Y

-The wellknown elements comprising the operating mechanisms of a conventional tractor, viz.,

the engine, gear transmission, differential gearing, driveshafts, power take-off shaft mechanlsms and/or hydraulic lifting mechanisms and the other various well known elements thereof,1

are not shown nor described because itis thought that they are so well known, that further illus- 'trationand/or description'would be superfluous.

My improvement is, basically, a novel, new and distinct fo-ur-tools-in-one disk implement adapted to be used with conventional tractors having mechanical or hydraulic lifts.

Itis also well known that various conventional Y -ventional hydraulic and/or mechanical lifting mechanisms incorporated as standard equipment in the various conventional tractors.\ While' the drawbar horsepower of the said tractors is such that many commercial implements can be pulled, yet thev lifting power'of the hydraulic and/or mechanical lifts, on the conventional tractors, prevents or limits the use of said commercial implements. This feature hinders or stops many sales of conventional tractors with lifts. To overcome this limitation in the lifting of heavy implements, I have provided a novel construction of a lifting arm I0 ywhich has a fulcrum II on a support I2 secured to the front axle support I3 of the tractor 8. Arm I will extend over the top of the rear axle housing I 4.

The particular design of said arm Ill serves to permit,the conventional tractor lifting mechanism, to raise or lift, several times more implement load, on the tractor, without` having'to resort to any mechanical changes in the conventional lifting mechanism. The application of simple levermechanics'to the arm I0, as shown in Figures 5V and 6 of the drawings, will prove the above statement.

As a statutory prerequisite of disclosing at least one known'way to operate or actuate the arm I0. I have placed a worm I5 onto a conventional power take-oi shaft a. This worm I 5 will drive a worm-wheel I 6. Suitable clutch and reversing mechanism, not shown, would obviously be applied, to the worm I5, in order to regulate the. clockwise or counterclockwise movement of the wormwheel IB.

Secured to the worm-wheel I6 is a crank I1 which'serves to transmitvthe movement of said worm-wheel IG to the' main lifting arms LII). A slot I8, in arm III, provides connection with crank Il. On the outer end portionv I9 of arm. I0, I

connect my improved disk implement 28. There will be two arms Ill each parallel to each other on the' same vertical plane. They will move as a unit. In the vicinity of the rear axle housing I6, I form a bridge-shape 2I, in the arm ID. This bridge-shape 2I may obviously be eliminated and the arm Ill made straight if so desired.

Arm I0 is thus moved in an upward direction and/cr downward direction, on fulcrum II, by the corresponding movement of crank I'I moved by the worm-wheel IB.

The only difference between the operation of this mechanical lift I6 and a conventional hydraulic lift is that, the crank I1, in a hydraulic lift mechanism, would be actuated by a hydraulic piston instead of a Worm-wheel I6.

A' top connecting link 22 is solely provided to maintain a horizontal position to the disk implement 20 when it is operating in the soil. See Figure 5 of the drawings. Connecting link 22 is secured on one end portion thereof to the tractor 8 by meansof bracket 23 whichis fastened to the top of the differential gear housing 24. On its opposite end portion, it is connected with the up- Vrights 25 of the cantilever rigid-hitch 26 of the disk implement 20.

Y Disk implement 20 comprises a single steel shape frame 2l to which a cantilever rigid-hitch 26 is connected. This cantilever rigid-hitch 26 extends over the tops of front gang 28 of disk blades 30 and serves to connect the frame zlrwith the tractor 8. Cantilever rigid-hitch 26 provides a close-up hitch withthe tractor 8 and prevents the disk implement 2U from pulling away from v the tractor 8 on hillside Work. A notable feature of the cantilever rigid-hitch 26 is that it connects with the disk implement 2li at a place located between the both gangs of disk blades. This said hitch 26, while shown to be made up of steel shapes, is rectangular in shape and it may be formed a steel castingV if so desired. Cantilever rigid-hitch 2B permits the disk implement frame 2l to be offset to either side of it.

On the market, at the present day', there are several makes of conventional tractors with hydraulic or mechanical lifts. 'Ihesesaid-conventional tractors all have similar connecting arms of various proportions. My cantilever rigid-hitch is formed a universal design for connection, to the various conventional tractors, without departure from the design thereof illustrated and with but slight changes in proportion only.

Disk implement 20 is as heretofore stated really four tools in one. It may be called a kit of implements. Heretofore no ,disk harrow was adapted to be changed intoa disk furrower or a disk ridger or a disk ditcher Without the use of extra parts or otherwise. Nor was any disk furrower adapted to be changed into a disk harrow, nor a disk ridger into a disk furrower, nor a disk ditcher into a disk harrow, yet this is now disclosed by my four-in-one disk implement 20.

I am enabled to make these said four-tools-lnone by the reason of the construction of a single disk blade 30 'mounted on a single disc bladebracket it would be impossible for me to make three other tools out of `the disk harrow shown inFigure 1. l

By this, four-in-one implement, great saving inmaterial is accomplished, for example: In a conventional five-foot three inch offset disk harrow, which is the same size as the disk narrow shown in Figure 1 of the drawings, fourteen disk blades are used; in a conventional disk furrower, of `similar size, six disk blades are used; in a conventional disk ridger, four disk blades are used;

in a conventional disk ditcher, six disk blades are used. Therefore in the four conventional disk implements mentioned there would be some thirty disk bladesused not mentioning other elements whereas, in my diskimplement 20 there would be required but twelve disk blades needed to form any one of the above mentioned four tools. This amounts to a saving, in material, in disk blades alone,` of about one hundred percent. Further there would be required three additional frames in the conventional implements, so ih frame construction, it can be said, that my isk implement saves over three hundred percent in materials for frame construction.

With the use of one tractor, no farmer ever has the occasion to use any two, of the four, above mentioned implements at the same time.

' In the disk implement 20, ythe number of parts required to make the disk harrow, are the maximum number of parts required for the said, disk implement 20, in other words, no additional parts are necessary to make any one of the other three implements, viz., ridger or ditcher or furrower.

By referring to Figure 1 of the drawings, there is shown a five-foot three-inch disk harrow 34 comprising a front gang 28 of disk blades, six in number, and marked g, ,h, i, lc, Z and m. Each disk blade 30 is mounted on an individual bearing bracket 3|. Each bracket 3| is individually secured to the central frame member 2l. Running parallel to the said front gang of disk blades is a rear gang 29 of disk blades 30 having similar mountings and securement as the said front gang 28. Six disk blades also form this Y rear gang 29 and these are marked a, b, c, d, e

and f. The said 'rear gang 29, of disk blades, is in staggered formation relative to the location of the front gang 28 of disk blades. Each disk blade 30 of the front and rear gangs has a xed plow angle 32 and sucti-on angle 33.

Referring to Figure 2. To quickly change the disk harrow 34 into a disk furrower` 35 I simply remove the disk blades, of the rear gang 29, marked b, d, and'e and the disk blades, of the front gang 28, marked h, i and Z, together ywith their respective brackets 3|. However, disk blade a, of the rear gang 29,'is moved from its original position as sh-own by the dotted lines and disk blade 'm is likewise moved from its original position as shown by the dotted lines 52. No other parts are added in this change over from a harrow 34 to a furrower 35 and the same identical frame 21 and hitch 26 is used therewith.

Using the harrow 34, in Figure 1, to illustrate the change over to a disk ridger 36 as shown in Figure 3; disk blades marked a, b, and c are removed from the rear gang 29, and disk blades marked k, l and m are likewise removed from the front gang 28, together with their respective brackets. No other change is necessary.

Using the harrow 34, in Figure 1, to illustrate the change over to a disk dtcher 31 as shown in Figure 4; the disk blades marked d, e, and f are removed from the rear gang 29 and disk blades g, h, and i are removed fromV the front gang 2B, together with their respective brackets. No other change is necessary.

To reconvert any of the implements back into any one of the other three tools, the necessary brackets 3| together with their respective disk blades 30 are merely replaced into their required position on the frame 21 to suit the tool desired.

Referring in detail to the single bearing bracket 3| whichis arranged to give a set plow angle 32 and a suction angle 33 to a single disk blade 38, and by further reference to'Figure 7 of the drawings; a preferred steel casting 38 serves to provide a bearing 39 which is angled to create a suction angle 33 to the said disk. blade 30, while its base 40 serves to provide the plow angle 32 thereto, in its connection with the frame 21.

Into the bearing end portion 39, a removable bushing 4| is mounted and secured from longitudinal movement by means of a bolt and nut 42, which holds the bushing 4| to the bracket 3|. A rotatable shaft 43 is mounted in the bushing 4| and it is limited in its longitudinal movement by the means of its head 44 bearing against the fixed bushing end 45. A cylindrical washer 46 is pressed cnto the shaft 43 and it has relative rotation with `said shaft. This shaft 43 may be welded to the washer 46, if it is so desired. Washer 48 has a large bearing surface 4T to take care of the end thrust set-up by the disk blade 3|). A grease seal, for a dust-proof precaution, is provided by the outward extending cylindrical lip 48\of washer 46. Said Washer 46 has a series of holes adapted to receive a series of plow bolts 49, which are provided to secure the disk blade 30 to the washer 46. This bolting 49 arrangement permits the disk blade 30, washer 46 and 'shaft 43 to rotate as a unit, while the bushing 4| is secured against rotation. A grease fitting 50 is provided for lubrieating this bearing.

What I claim is;

1. In a disc harrow constructed to be pulled by a tractor and raised or lowered by a lift mechanism made part of said tractor; a steel shape; a series of forwardly and rearwardly extending individual brackets, comprising a single rotatable series of forwardly and rearwardly extendingv bearing brackets individually and shiftably mounted on said steel shape in a disc harrow formation beingarranged to form a furrower formation; a single rotatable disc blade mounted on each said bracket, each said disc blade inclined vertically and horizontally; a connection from the said steel shape to the lift mechanism in the tractor.

3. In a disc harrow constructed -to be pulled Vby a tractor and raised or lowered by a lift mechanism made part of said tractor; a series of forwardly and rearwardly extending individual brackets; each bracket having a single rotatable disc blade mounted thereto; a bar detachably secured to and supported by the said brackets and blades; said bar constructed to provide a disc harrow formation of disc blades or a disc furrower formation of disc blades; a connection to the lift mechanism of the tractor.

Y 4. In a disc harrow constructed to be pulled by a tractor'and raised or lowered by a lift mechanism made part of said tractor; a series of forwardly Vand rearwardly extending individual brackets; each bracket comprising a single rotatable disc blade; each disc blade inclined vertically and horizontally; a bar detachably secured to and supported by the said brackets; a hitch,I to the lift mechanism of the tractor, shiftably mounted on said bar; said bar constructed to provide the `disc harrow formation of. disc blades and to permit conversion of the disc harroW fori'- mation` into a disc furrower formation of disc blades and yto reverse the saidformations.

-5. In adisc harrow constructed to be pulled by a tractor and raised or lowered vby a lift-mechanism made part of said tractor; a series of forwardly and Y rearwardly extending bearing brackets; a single rotatable disc blade inclined vertically and horizontally and mounted on each said bracket; a bar detachably secured to said brackets; `a hitch, tothe lift mechanism of the tractor, mounted Von said bar; said disc h'arrow formation of discblades constructed to permit conversion therefrom to provide a disc furrower formation of disc blades or a disc ridger formation of disc blades or a disc ditcher formation of disc blades and to permit a reversal of the said formation of disc blades into each others formation.

6. In a disc harrow constructed to be pulled y wardly and rearwardly extending individual bearing brackets; each bracket providing a mounting for a single rotatable disc vblade being inclined vertically and horizontally; a bar detachably secured to said brackets and constructed to provide a. disc harrow formation to the disc blades and to provide a conversion arrangement of disc blades to form either a disc furrower formation of disc blades or a disc ridger formation of disc blades ora disc ditcher formation of disc bladesY and to permit a reversal of any one of the'said disc blade formations into their former formation; a

l hitch mounted on the bar for connecting the bar to the tractor. 15

7. In a tractor having a lift mechanism, the combination of: a disc harrow constructed to be raised or lowered by the lift mechanism and comprising a parallel series of forwardly and rearwardly extending bearing brackets, each bracket having a single rotatable Y disc blade mounted thereto, each blade being inclined vertically and horizontally, a bar detachably secured to the said brackets, a cantilever hitch shiftably mounted on said bar and constructed to connect said barjto a lifting lever having a fulcrum support secured inthe vicinity of the front axle of the tractor.

8. A combination as defined in claim 7 in which a. crank is connected with the lifting lever and is constructed to be operated by the lifting mechanism in the tractor for raising or lowering the"

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