公开(公告)号：US09920777B2

公开(公告)日：2018-03-20

申请号：US14171462

申请日：2014-02-03

Applicant: ABB Technology AG

Inventor： Thomas Brenneis ,  Matthias Schmidt ,  Henrik Lohrberg ,  Frank Fiedler ,  Bruno Gehlert ,  Roland Palm

IPC: F15B15/22 ,  H01H3/60 ,  H01H33/34

CPC classification number: F15B15/22 ,  H01H3/605 ,  H01H33/34

Abstract: A differential cylinder for a hydromechanical drive for actuating an electrical switch, for example a high-voltage switch, is disclosed which includes a first pressure region for applying a working pressure, a second pressure region, and a piston which is capable of moving in a movement region and which is movable depending on a pressure difference between the first and second pressure region. A damping device is provided which, in the event of a movement of the piston in the direction of the second pressure region, provides damping with respect to the movement of the piston in a section of the movement region, wherein the damping is adjustable.