A balanced piston pump (300) for use in subsea vehicles, for example in a variably buoyancy engine, includes an inlet (321), an outlet (325) and at least one fluid path between the inlet and the outlet. A piston arrangement in the fluid path includes a stepped piston (330) having a large end (333) and a small end (331). The step (336) of the piston cooperates with the body (310) of the pump to form a piston chamber (320). The ends (332, 334) of the piston are each exposed to ambient pressure. The force required to drive the pump is dependent on the difference in cross sectional areas of the ends of the pistons.


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    Title :

    BALANCED PISTON PUMP FOR SUBSEA USE


    Additional title:

    AUSGEGLICHENE KOLBENPUMPE FÜR DEN EINSATZ UNTER WASSER
    POMPE À PISTON ÉQUILIBRÉE POUR UTILISATION SOUS-MARINE


    Contributors:
    ALLUM RONALD (author) / LAVERY ALAN (author) / JOHNSTON MATTHEW (author) / HORNER RHYS (author)

    Publication date :

    2025-02-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B63G OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS , Angriffs- oder Verteidigungsanordnungen auf Schiffen / F04B Verdrängerkraft- und Verdrängerarbeitsmaschinen für Flüssigkeiten , POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS



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