Patent ID: 6151753
Filing Date: 2000-11-28
Classification: E05F,E05Y,Y10S,Y10T

Abstract:
A door-closing apparatus for the closing of doors, said door-closing apparatus comprising:a door-closing apparatus housing;a piston arrangement being disposed within said door-closing apparatus housing;said piston arrangement comprising:a door piston;said door piston being configured and disposed to be axially displaced by the movement of a door;an extending portion;said extending portion being attached to said door piston and disposed to extend in an axial direction from said door piston;a pressure piston;said pressure piston being configured and disposed to exert a force on a fluid medium;an energy storage mechanism;said energy storage mechanism being configured and disposed to exert a force on said pressure piston;said door piston and said pressure piston being disposed in said door-closing apparatus housing and configured to be axially movable in said door-closing apparatus housing;a first pressure chamber being disposed in said door-closing apparatus housing;a second pressure chamber being disposed in said door-closing apparatus housing;a line arrangement being disposed in said door-closing apparatus housing;said first pressure chamber and said second pressure chamber being connected by said line arrangement to permit flow of fluid between said first pressure chamber and said second pressure chamber;said door piston being configured and disposed to exert a force directly on a fluid medium in said first pressure chamber and to exert a force directly on a fluid medium in said second pressure chamber;at least one additional pressure chamber;said at least one additional pressure chamber being disposed adjacent said pressure piston;said pressure piston being configured and disposed to exert a force on a fluid medium in said at least one additional pressure chamber;a middle pressure chamber being disposed between said second pressure chamber and said at least one additional pressure chamber;said middle pressure chamber being disposed adjacent at least one of said extending portion and said pressure piston;at least one of said extending portion and said pressure piston being configured and disposed to exert a force on a fluid medium in said middle pressure chamber;a hydraulic connection;said hydraulic connection being configured to hydraulically connect said door piston to said pressure piston to permit said door piston to hydraulically move said pressure piston during an opening operation;said hydraulic connection being physically disposed to hydraulically connect said door piston to said pressure piston to permit said door piston to hydraulically move said pressure piston during an opening operation;said hydraulic connection being configured to hydraulically connect said door piston to said pressure piston to permit said pressure piston to hydraulically move said door piston during a closing operation;said hydraulic connection being physically disposed to hydraulically connect said door piston to said pressure piston to permit said pressure piston to hydraulically move said door piston during a closing operation;said door piston being configured to permit contact of said pressure piston with said extending portion to permit said door piston to mechanically move said pressure piston during an opening operation;said door piston being physically disposed to permit contact of said pressure piston with said extending portion to permit said door piston to mechanically move said pressure piston during an opening operation;said door piston being configured to permit contact of said pressure piston with said extending portion to permit said pressure piston to mechanically move said door piston during a closing operation;said door piston being physically disposed to permit contact of said pressure piston with said extending portion to permit said pressure piston to mechanically move said door piston during a closing operation;said door piston in combination with said hydraulic connection being configured to first hydraulically and then mechanically move said pressure piston during an opening operation;said door piston in combination with said hydraulic connection being physically disposed to first hydraulically and then mechanically move said pressure piston during an opening operation;said pressure piston in combination with said hydraulic connection being configured to first hydraulically and then mechanically move said door piston during a closing operation; andsaid pressure piston in combination with said hydraulic connection being physically disposed to first hydraulically and then mechanically move said door piston during a closing operation.