发明名称 Tiller with automatically adjusted angle of attack
摘要 The invention relates to a hand device for tilling the earth comprising a flat blade sharpened on all edges which is mounted on a side of a resilient, preferably trapezoidal shaped, frame, with the opposite side of the frame being mounted upon an elongated handle. The tilling device includes an automatic depth control including the resilient frame.
申请公布号 US4246970(A) 申请公布日期 1981.01.27
申请号 US19780956082 申请日期 1978.10.30
申请人 FRANKE, GORDON R. 发明人 FRANKE, GORDON R.
分类号 A01B1/06;(IPC1-7):A01B1/06 主分类号 A01B1/06
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