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Aug. 13, 1946. I A, B, ALLEN GULTIVATOR WHEEL Filed April 20, 1944 ' 2,405,630 Patented Aug. 13,- 1946 2,405,53 UNITED STATES ATENT OFFICE 2,405,630 cuL'rIvA'roR WHEEL Andrew B. Allen, Ochre River, Manitoba, Canada Application April 20, 1944, Serial No. 531,894 3 Claims. 1 (Cl. 97-217) 2 My invention relates to cultivator wheels de ceed to perform a deep curvature, so that the signed to be mounted in line upon a shaft posi Wheel as-a-whole may be properly described as tioned diagonally to the direction of travel, pre concave. ' cisely in the manner that conventional cultivator The outer ends 8 of the spokes are rabbeted discs are mounted, an object of this invention 5 to receive the rim 9, which is secured to the being to provide a device of the character here spokes by means of the nut and bolt assemblies within described by means of which a more effi cient weed exterminating operation vmay be car' ried out in one stroke of the implement to which my wheels are attached. A further object of my invention is to provide in, the rim being edge-sharpened as clearly illus trated in» the accompanying Figure 2. Although the spokes 6 may beof roundtrans~ 10 verse cross-section, 0r of any other desired trans verse cross-section, it is to be noted from Figures 3 and 4 that the spokes are shaped to a trans verse cross-sectional con?guration such as pro vides a longitudinal edge H to facilitate the vator, is of rugged construction, and is provided 15 penetration or entrance of the spokes into the with a detachable rim capable of being sharp ground while the wheels are rotating askew in a device of the character herewithin described which is simpli?ed, self -cleaning, can be attached readily to the diagonal shafthof any disc culti ened or replaced. With the above more important objects in view and such other minor’objects as may appear as the direction of the arrow I2 when the cultivator superstructure is being pulled in the direction‘ of the arrows t3. _ ' the speci?cation proceeds, my invention consists 20 It is-to ,7 be understood that my cultivating essentially in the arrangement and construction wheels rotate just as do conventional cultivating of parts all as hereinafter more particularly de discs when mounted at spaced intervals upon a scribed, reference being had to the accompany disc shaft 3 having the conventional ground wheel ing drawing, in which: l4‘ keyed to the end thereof. However, since I Figure l is a view of one of my cultivator 25 deem it desirable for the purpose of reducing draft wheels in the plane of its rotation. that the spokes should penetrate the ground with Figure 2 is a section on the line 2-—2 of Figure 1. as little resistance as possible, it is to be under Figure 3 is a section on the line 3-—3 of Figure 1. stood that the longitudinal edges II are so posi Figure 4 is a schematic plan embodying a skele tioned that they will enter the ground ?rst as the tal representation of the essential parts of a disc 30 wheels roll forward. cultivator superstructure, viz. the draw bar, di- ' Since the cultivator wheels are positioned di agonal shaft, and the ground wheel thereof, and agonally, or askew with respect to the direction illustrating my cultivator wheels in situ thereon. of travel of cultivator superstructure, it will be In the drawing like characters of reference in apparent that in order to design spokes of a dicate corresponding parts in the different ?gures. 35 transverse cross-section such as will reduce draft To describe ?rst one of my cultivator wheels to a minimum, the longitudinal edges H thereof per se, the same will be seen to comprise a con centric hub ! provided with a squared central aperture 2 designed to engage the conventional must be on the convex side of the neutral plane of the wheel as-a-whole, and such plane I have indicated in the accompanying Figure 2 by the squared, horizontal, and diagonally disposed disc 40 numeral l5. In fact, as a consideration of Fig ure 2 will indicate, the heavy boundaryline E6 formed integral with the hub, and being pro of the downwardly extending spokes B repre shaft 3, a sleeve 4 functioning as a spacer being vided for the purpose of spacing the several wheels sents the edge I l of that spoke. In the accompanying Figure 4, I have en accompanying Figure 4, the sleeve 4 functioning 45 deavored to indicate the manner in which the in precisely the same manner as the spacing edges H of the spokes enter the ground ?rst, sleeves which are commonly inserted between Figure 4 embodying a schematic representation each conventional cultivating disc when these of the essential parts of a conventional cultivat 5 a desired distance apart as illustrated in the are mounted on the shaft 3. ing disc superstructure required for crientating Radiating from the huh I are spokes 6, of 60 one’s mind to the cross-section of, my spokes, which any desired number may be provided, 211- ‘_ though I have found that ?ve is, for most con- ‘ and in this ?gure I have included a draw bar assembly 15', whereby the implement including ditions the most satisfactory number. the diagonal shaft 3 is drawn in the direction The spokes 6 are preferably straight between of the arrows 13. the limits 1 (see Figures 1 and 2), but then pro 65 In Figure 4 I have illustrated several culti 2,405,630 3 4 vating wheels schematically, but have included in one of them a fragmentary representation of a . portion of a wheel rim 9 and a spoke 6, in con nection with which it should be understood that the fragment of spoke illustrated is projecting downwardly, ‘being in the position it would occupy when the lower curved end thereof is submerged in the soil. A consideration of the foregoing de tail in association with the band-arrow "5 will clearly indicate that as the spokes successively rotate and enter the ground with the longitudinal edges II in advance, an ef?cient scouring action will take place along the surfaces I’! and I8 . positioned diagonally to the direction of travel, said wheel consisting of a hub, spokes radiating therefrom normal to the rotary axis of said wheel for a substantial portion of their total length and then curving, a rim connected to the outer ends of said spokes, the wheel as-a-whole thus having the characteristic of concavity, said rim having an edge-sharpened outer perimeter. 2. A concave-o-convex cultivator wheel for at tachment to a shaft positioned diagonally to the direction of travel, the concave side thereof being the leading side, said wheel consisting of a hub, spokes radiating therefrom, said spokes, when which converge towards the edges H, whereby, - viewed in transverse cross-section, having a the soil will be parted with a minimum of re‘ 15 boundary which is rounded for a portion of its length but converges to a point substantially op posite the rounded portion to provide a longi tudinal soil entering edge on the convex side of sociation with the accompanying drawing, it will said wheel, said rounded portion being on the become apparent that I have succeededv in de-v ?ning a cultivator wheel structure which will ma 20 concave side, said spokes being curved medially uponthe length thereof and a rim connected to terially reduce the draft in comparison for in the outer ends of said spokes, said rim having, an stance with the conventional solid disc cultivator, edgeesharpened outer perimeter. which will sever and out off weed-growth in its 3. A concave-o-convex cultivator wheel for at advance with much less agitation of the soil than is'the'case with’ the conventional disc cultivator, 25 tachment to a shaft positioned diagonally to the direction of travel, the concave side thereof being and which will, in addition, be self-scouring or the leading side, said wheel consisting of a hub, self-cleaning by permitting the soil to escape spokes vradiatingtherefron'i normal to the rotary between the spokes. sistance thereby. From a consideration of the foregoing in as-. axis- of said wheel, for. a substantial portion of Since, various modi?cations can be made in my invention as hereinabove described and many ap 30 their total length, and then ‘curving, a. rim con parently widely different embodiments of‘ same made within the scope of the‘ claims without departing from such spirit and scope, it is in tended that all matter contained in theaccom panying, speci?cation shall be interpreted as il lustrative only and not in a limiting sense’ and I desire only such limitations placed thereon as nected to the outer ends of said spokes, said spokes when viewed in transverse cross-section having a boundary which is rounded for a por tion of, its length but converges. to a point sub stantially opposite the rounded portion to provide a longitudinal soil entering edge on the convex are speci?cally expressed in the accompanying side of said wheel, said rounded portion being oil-the concave side, said rim having an edge claims. sharpened outer perimeter. ‘ What I claim as my invention is: l. A cultivator wheel for attachment to a shaft , ANDREW B. ALLEN.