Positioning hinge for closing door leaf, has piston slidably arranged in chamber to divide chamber into two pressure chambers, and piston rod attached at piston and projecting from housing, where passage stands in connection with chambers

摘要

The hinge has an automatic closing device (40) connected with an axis of rotation (20) and comprising a cylinder (42), where the cylinder is supplied with compressed air and connected with a positioning surface (22) at the axis of rotation. A housing (422) comprises a chamber that is filled with compressed air. A piston (424) slidably arranged in the chamber to divide the chamber into two pressure chambers. A small passage (425) is defined by the piston and stands in connection with the pressure chambers. A piston rod (426) is attached at the piston and projects from the housing.