发明名称 Agricultural clean-out drag
摘要 An agricultural clean-out drag particularly adapted to smooth out dikes, is mounted upon a boom. The drag is pivoted rearward of center so the front of the drag tends to hang down to bear against the ground. The drag is a shell, semi-circular in shape. The front is flat. The boom is pivoted behind the plow shank and is spring biased downward. The front of the drag is chained to the boom to limit the downward travel of the front of the drag.
申请公布号 US4449591(A) 申请公布日期 1984.05.22
申请号 US19810329293 申请日期 1981.12.10
申请人 LEE, JR., LINDELL E. 发明人 BROWN, GEORGE L.;LEE, JR., LINDELL E.
分类号 A01B13/00;E02F5/02;(IPC1-7):A01B13/00 主分类号 A01B13/00
代理机构 代理人
主权项
地址