A double-acting hydraulic impact hammer includes a drop weight and an inner hydraulic piston. The drop weight is arranged to be driven in an upward and downward direction and the drop weight acts on a pile during its downward motion. The piston has a voided internal area defining a piston volume which is arranged to receive a piston rod and along which the piston extends and retracts axially. The piston volume is in sealed hydraulic communication with the hollow rod volume to form a first volume which changes size as the piston moves along the piston rod whereby the application of hydraulic pressure to the first volume biases the piston towards its extended position. The hammer includes a bore and a collar. The collar forms an outer piston having a working surface which when exposed to hydraulic fluid has sufficient surface area to lift the piston and the drop weight.


    Access

    Download


    Export, share and cite



    Title :

    Pile hammer


    Contributors:

    Publication date :

    2021-01-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    E02D FOUNDATIONS , Gründungen / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS



    The Self-Contained Diesel Pile Hammer

    Leigh, T. M. | SAE Technical Papers | 1964


    Planet wheel type drop hammer pile driver

    XU QING / ZHANG JING / XU XIANGHUA | European Patent Office | 2020

    Free access

    Drop hammer winch for large pile driving barge

    HUANG ZHONGPING / JIA YANYAN / SHI LIUJIAN | European Patent Office | 2021

    Free access

    Turnover method of anvil for offshore pile hammer

    SHI RUXING / WANG JINGWEI / LIN YICHOU et al. | European Patent Office | 2024

    Free access

    SOIL MODELING FOR PILE DRIVING SIMULATIONS USING A VIBRO HAMMER

    Bielefeld, M. / Moscoso, N. / Verbeek, G. | TIBKAT | 2020