Lawn-aerating machine
    3.
    发明授权
    Lawn-aerating machine 失效
    法制机

    公开(公告)号:US3566973A

    公开(公告)日:1971-03-02

    申请号:US3566973D

    申请日:1968-08-05

    申请人: WALTER BRADLEY

    IPC分类号: A01B45/02

    CPC分类号: A01B45/02

    摘要: A lawn-aerating machine has a chassis which may be moved about the lawn on wheels. A transmission case moves vertically relative to the chassis and from the case depend drills shaped to dig holes in the lawn. A prime mover drives each of the drills. Means is provided to lower the drills relative to the chassis under control of the operator.