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    Lifting cage with overweight locking alarm function

    Free access
    XU FENG / YANG JIE / LI JIAN et al. | European Patent Office | 2023

    Branch locking device for underground inclined drift transport mancar

    Free access
    XU FENG / YANG JIE / LI JIAN et al. | European Patent Office | 2023

    Simple chain ring overload protection device

    Free access
    SHAO YUNLIANG / LI JIAN / TAO ANXIANG et al. | European Patent Office | 2022

    Square crosspiece chain ring and manufacturing method thereof

    Free access
    FENG JINWEI / TAO ANXIANG / TAO LIANGFENG et al. | European Patent Office | 2021

    Non-circular section chain ring and manufacturing method thereof

    Free access
    XU ZIJUN / TAO ANXIANG / TAO LIANGFENG et al. | European Patent Office | 2021