The invention discloses an improvement of a simple jack. In use of a common simple jack, a screw is tightened through screwing by means of a wrench or a sleeve. Commonly, the wrench easily slides off in screwing, thereby causing inconvenience in actual use. Through adding a handle on the end of the screw, the handle can be moved in a left-and-right direction. When the screw is tightened in screwing, rotation of the handle is required. When the handle is screwed to the lower end, the other handle can operate for downwards tightening the handle, thereby realizing simpler operation and higher convenience.


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    Title :

    Improvement of simple jack


    Contributors:
    CAI LIFENG (author)

    Publication date :

    2015-12-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last



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