| 摘要 |
1,220,723. Tractor hitches. DEERE & CO. 14 Aug., 1968 [14 Aug., 1967], No. 38921/68. Heading A1P. A weight transfer hitch for connecting trailers or agricultural machinery 64 to tractors provided with a pair of vertically adjustable lower draft links 24, includes an upright frame 76 connected at its lower ends to the draft links 24 and at its upper end by a brace 86 to the draft links 24, the frame 76 also being connected at its upper end to the draft tongue 68 of the towed implement 64 via a chain or rope 104, and at its lower ends via a pivot pin and a rod 98 rotatably and releasably attached to the lower ends 78. A lever 52 may be set for the required transfer of weight of the implement 64 to the tractor thus operating a control valve (54) in a hydraulic circuit, Fig. 4 (not shown), to lift the links 24 which then support the implement 64. When used in draft control, draft forces are transmitted via links 24, A-frame 26 and bendable rod 30 to the hydraulic control circuit for corresponding lifting and lowering of the links 24. |
