ANORDNING FOR HURTIG AAPNING, DEMPNING AV AAPNINGEN OG TIL AA HOLDE AAPEN EN HENGSLET LUKKEDEL OMFATTENDE ELASTISKE ORGANER SOM PAAVIRKER LUKKEDELEN I EN AAPEN RETNING

摘要

Apparatus for quickly opening, damping, holding open and closing a hinged closure member such as a door, comprising a spring urging a door in an open direction, and a fluid operable jack the piston rod of which is hinged to a variable reduction lever linked to the door, and the jack and lever are connected to damping and locking systems.