An improved timber jack for raising and supporting logs off from the ground has an elongated lever arm handle member supporting a fulcrum at a distal end of the handle creating a lever of the first class. The novelty resides in having an arcuate fulcrum such that applying a force at a proximal end of the handle causes the fulcrum to roll on the ground as the log is being lifted. Less effort is required to lift a given load as compared to conventional timber jacks.


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    Title :

    TIMBER JACK WITH ARCUATE FULCRUM


    Additional title:

    WAGONNET POUR TRONC A POINT D'APPUI ARQUE


    Contributors:

    Publication date :

    2021-11-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B27B Sägen für Holz oder ähnliches Material , SAWS FOR WOOD OR SIMILAR MATERIAL / B65G TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS , Transport- oder Lagervorrichtungen, z.B. Förderer zum Laden oder Abladen / 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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