Apparatus extensible and shortenable to a mast or support with frame- or plate-shaped segments (1) having at a bottom edge and upper edge connecting means for the linking of the segments to a chain (8a, 8b, 8c) with at the side edges connecting means for a releasable horizontal link of the segments into a tube having in cross-section a triangular, respectively quadrangular, pentagonal or polygonal form.


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    Title :

    EXTENDABLE DEVICE FOR FORMING A MAST OR SUPPORT


    Additional title:

    VERLÄNGERBARE VORRICHTUNG ZUM ERGEBEN EINES MASTS ODER EINES TRÄGERS
    DISPOSITIF EXTENSIBLE POUR CONSTITUER UN MÂT OU UN SUPPORT



    Publication date :

    2023-08-30


    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



    Extendable mast

    Coyner, J. V., Jr. / Hedgepeth, J. M. | NTRS | 1979



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