发明名称 Soil crust loosening apparatus
摘要 An apparatus for loosening a crust formed in the soil over planted seeds. A drum having a plurality of fingers rotatably disposed around an outer cylindrical surface thereof is biased toward the ground by spring rods which are adjustably attached to a frame. The frame is typically mounted to a prime mover such as a tractor or to a cultivator or the like attached to an agricultural tractor.
申请公布号 US4768596(A) 申请公布日期 1988.09.06
申请号 US19870028738 申请日期 1987.03.23
申请人 HARRISTON INDUSTRIES, INC. 发明人 RISKI, JOHN D.
分类号 A01B21/04;A01B39/08;(IPC1-7):A01B29/06;A01B35/28;A01B39/12 主分类号 A01B21/04
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