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    Portable post driving apparatus
    4.
    发明授权
    Portable post driving apparatus 失效
    便携式后置驱动装置

    公开(公告)号：US5819857A

    公开(公告)日：1998-10-13

    申请号：US874871

    申请日：1997-06-13

    Applicant: Daniel F. Rohrer

    Inventor： Daniel F. Rohrer

    IPC: E02D7/10 ,  E04H17/26 ,  B25D9/08

    CPC classification number: E04H17/263 ,  E02D7/10

    Abstract: A portable power driven post driver. The post driver has an inner hollow cylinder open at its upper end and adapted to receive a post through a locking mechanism located at its lower end. The inner cylinder is located within an outer hollow cylinder in sliding engagement therewith, the outer cylinder having a closed upper end in contact with the upper end of a post held in said inner cylinder. Two fluid powered cylinders and associated pistons are attached to the outer surface of the outer cylinder, the longitudinal axes of the two fluid powered cylinders being in alignment. A common piston rod extends between the two pistons and is attached by a fastening member to the inner cylinder, the fastening member extending through a slot in the outer cylinder. A valve receives compressed fluid, such as compressed air, and cyclically and alternately directs the compressed fluid to the two fluid powered cylinders to alternately raise the outer cylinder above the inner cylinder and to drive the upper cylinder downwardly into post driving contact with the upper end of a post held by the inner cylinder.

    Abstract translation: 便携式电力驱动的帖子驱动程序。 后驱动器具有在其上端开口并且适于通过位于其下端的锁定机构接收柱的内部中空圆柱体。 内筒位于与其滑动接合的外部中空圆筒内，外筒具有与保持在所述内筒中的柱的上端接触的封闭上端。 两个流体动力缸和相关联的活塞附接到外筒的外表面，两个流体动力缸的纵向轴线对齐。 常见的活塞杆在两个活塞之间延伸并且通过紧固构件附接到内筒，紧固构件延伸穿过外筒中的槽。 阀门接收诸如压缩空气的压缩流体，并循环地并且交替地将压缩流体引导到两个流体动力缸，以将外筒交替地升高到内筒上方，并将上筒向下驱动以与上端 由内筒保持的柱。

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