US1715063A - Drawbar for harrows - Google Patents

Description

May 28, 1929. ENDRES 7 1,715,063 I DRAWBAR FOR HARROWS Original Filed June 25, 1926 Patented May 28, 1929.

entree LAWRENCE M. ENDRES, 6F WAUNAKEE, WISCONSIN nnnwizan roe.- HARROWS.

Application filed June 25, 1926, Serial 110. 118,428. Renewed. Apri112, 1929.

This invention relates to adrawbar for harrows, and is particularly d rected to a drawbar for a toothed harrow. I 4 it is theusual practice to draw harrows across a field in sets or groups, and it has been the practice heretofore, to provide a drawbar for the entire group so that all of the harrows may be simultaneously drawn across the field. This modeof operation, however, has the defect of not permitting the same freedom that the harrows heretofore have had when will permit the folding of one harrow over the other so that although a plurality of units.

may be used in the normal operation of the device, nevertheless they may be folded to permit passage through constricted spaces, and to permit the ready drawing of the harrow to and from the place of work.

Further objects are to provide a drawbar for harrows which is so constructed that the draft or pull is distributed correctly for the several harrows without excessive strains and without any tendency to buckling or fold ing up.

Further objects are to provide a drawbar for harrows having the characteristics noted above, which may be very cheaply constructed, which is eminently practical in operation, and which is strong and rigid.

An embodiment of the invention is shown in the accompanying drawings in which:

Figure 1 shows the drawbar attached to several harrows and shows the harrows in their extended position; v s

Figure 2 is a rear view of the drawbar showing one of the sections folded;

Figure 3 is a detail of one of the joints of the drawbar, such view being a plan view;

Figure 1 is an elevation of one of the joints.

The drawbar consists of'a central'section 1 and a plurality of end sections 2. In the form shown, three sections have been illustrated, although obviously another number of sections maybe employed.

The central'section is attached to a forward bar 3, by means of bolts 4;, such forward bar being held in spaced relation to the bar lby means of sleeves 5, or spacers position-ed upon the bolts. 1

1 Further, the'bars l andg are braced'by in Figure 1. The 'drawbar may bedrawn across the field by means of the draft ring 7, which is joined to the bar 8 by means of the diagonal links 8. These links have their inner ends engaged by the plates 9, which are clamped beneath the nuts of the bolts 4. The other. end of the plates 9 carry diagonal links 10 which form a continuation of thelinks 8, as may be seen from Figure 1. These links have their ends received by looped or U-shaped portions-11, which. are pivotally secured to the bars 2 means of the diagonal; braces 6, as shown by means of the bolts or screws 12. It is upper portions, as shown most clearly in Figure 4:. It is to be noted from reference to Figure 3 that the bolts 4 pass through the ends of the bar 1 and are securely attached thereto by means of the rear nuts.

It is to be noted from reference to Figure 4; that a plate 15 is held bymeans of the bolts l rigidly against the back of the hinged member 13 of the bar 1, at each end of such bar and that such plate, conse-' quently, forms a bearing against which the adjacent end ofthe plates'13 for the end bars 2 may bear. This construction is most clearly illustrated in Figure 4.

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Each of the several bars are provided with eye bolts16 which carry links 17 by means of which the harrows 18 are attached in a floating or self-adjusting.manner to permit the harrowsto adjust themselves to the varying contour of the field."

It will, be seen, therefore, that a very strong construction ofjjointed drawbar has been provided for harrows so that the harrows may be drawn in groups across a field under normal working conditions and may be folded one over the other in order to render the structure compact and permit its passage through constricted spaces It Will be seen further that the device may be readily constructed and maybe cheaply produced.

Although the invention has been described in considerable detail such description is intended as illustrative rather than limiting as the invention may be variously embodied and as the scope of sucliinven tion is to be determined as claimed.

I claim:

' A drawbar for toothed barrows, comprisinga central bar, a forward bar positioned in front of said central bar, bolts and spacers joining said bars, a central draft ring positioned in front of said forward bar and joined to said bolts by means of links, end bars hingedly joined to said central bar and joined to said bolts by means of links forming a continuation of said first mentioned links and extending rearwardly in line With said first mentioned links, and

means carried by said central and end bars for attachment to barrows. I e

In testimony that I claim the foregoing I have hereunto set my hand at Waunakee,

in the'county of Dane and State of \Visconsin.

LAWRENCE M. Bunn es.

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