The present invention relates generally to hydraulic lift systems and, more specifically, to hydraulic pressure relief systems and methods on material handling vehicles. The hydraulic control system includes a pump having a pump outlet in fluid communication with a supply passage, a reservoir in fluid communication with a return passage, one or more hydraulic actuators configured to raise and lower a fork assembly attached to a mast of the material handling vehicle, a variable pressure relief valve configured to selectively provide fluid communication from the supply passage to the reservoir, and a controller in communication with the variable pressure relief valve and a pressure sensor configured to measure a pressure in the supply passage.


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    Titel :

    VARIABLE HYDRAULIC PRESSURE RELIEF SYSTEMS AND METHODS FOR A MATERIAL HANDLING DEVICE


    Beteiligte:
    WEISS THOMAS R (Autor:in) / SMITH ERIC A (Autor:in)

    Erscheinungsdatum :

    2021-03-18


    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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