An improved agricultural earth working implement

摘要

870,403. Agricultural implements. BACK, H. E. Feb. 11, 1959 [Feb. 19, 1958 ; June 26, 1958], No. 4827/59. Class 6(1). An agricultural implement comprises a pair of arms which extend forwardly over the tractor rear wheels and supports a tool bar comprising a centre portion and two outriggers pivoted to the centre portion. The rear ends of the arms are joined by an auxiliary tool bar adapted to receive tines and the arms are raised and lowered by the tractor hydraulic three point linkage 20, 22. The centre part includes spring members providing resilient support to the outriggers under load. The outriggers are raised when the arms are raised by means of lateral arms 92 each having an abutment pad 94 adapted to abut against the tractor sump when the centre part is raised thus raising the outriggers clear of the soil surface by causing them to pivot about their hinge axis. The implement may be used with seed planting gear.