GB865116A - Improvements in or relating to agricultural implements having draw-bars - Google Patents

Abstract

865,116. Draw gear for agricultural implements. VAN DER LELY N.V., C. July' 17, 1957 [July 27, 1956], No. 22651/57. Class 103(5). A vee-shaped draw bar 21, Fig. 1, is provided with a bearing 22 co-operating with a pivot pin 23 horizontally mounted on an agricultural implement such as the swathe turner shown. The draw bar may rotate slightly about the pin 23 when the implement is in use, and the tractor wheel may enter the vee as in 25B when turning. The draw bar may be pivoted to the dotted position for towing the implement on roads. In modifications the vee arms may be made adjustable in length, or one arm may be rotatably adjustable in a horizontal plane with respect to the other, Figs. 2 and 3 (not shown). In Fig. 4 the draw bar comprises arms 51, 54 which provide a first axis of rotation about the pin 56 and a second axis of rotation about the pin 53, so that the coupling 52 may have either of the positions shown or two further positions obtained by rotation about the pin 56. In another embodiment, Figs. 5 and 6 (not shown), the draw bar may be vertically offset from the plane containing the first axis of rotation, and in a further embodiment one arm of the vee is telescopically adjustable and the draw bar is rotatable about either vertical or horizontal intersecting axes. In Fig. 10 the draw bar may be pivoted about its first axis 80 to a further forward dotted position. In Figs. 11 and 12 (not shown) the coupling itself is rotatable about a pivot pin 84 lying parallel to the first axis of rotation, and in yet other embodiments two different arms spaced 90 degrees apart in a vertical plane pivot for alternative use around a horizontal first axis, or a single arm rotatable about a first axis may be readily detached from the pivot of that axis.