A lifting apparatus 100 suitable for lifting vacuum pumping and/or abatement equipment comprises a plurality of rams 110a-110d for engaging with equipment, a plurality of pumps 130a-130d to cause the rams to move the equipment and a plurality of valves 120a-120k for controlling the flow of fluid between the rams 110a-110d and the pumps 130a-130d. The lifting apparatus 100 is operable in a first mode or equal pressure mode in which the valves are configured such that each of the rams 110a-110d is in fluid communication with each other ram 110a-110d or the lifting apparatus is operable in a second mode or equal displacement mode in which the valves are configured such that each of the rams 110a-110d is fluidly isolated from each other ram 110a-110d. Also disclosed is a ram 200 comprising a body 210 having first and second pistons 220a, 220b disposed within first and second bores, the pistons 220a, 220b being movable out of their respective bores, the first piston 220a in a first direction and the second piston 220b in a second direction opposite to the first direction. Multiple rams 200 may be coupled together by a frame structure (300 fig. 4).


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    Titel :

    Lifting apparatus



    Erscheinungsdatum :

    2020-06-10


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    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 / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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