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US 6,266,847 B1Granted
Door operator and process for operation of a door operator
AssigneeGeze GmbH
InventorPeter Krumhauer
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AssigneeGeze GmbH
InventorPeter Krumhauer
Estimating the term…
A door closer assembly and a method for operating a door closer assembly. The door closer assembly includes a housing and a door piston guided in the housing. The door piston is operably connected to move a door. A spring piston is guided in the housing and is operable to assist movement of the door piston toward a door closing position. The spring piston is situated in the housing and is acted upon by a spring. The door closer assembly also includes a hydraulic control circuit containing hydraulic fluid which is operable to selectively eliminate a coupling of the door piston and the spring piston from one another during a portion of the travel path of the door piston in the housing. The door closer of the present invention improves the comfort of passing through a door by providing different transmission ratios and therefore, different moment curves.
Door closer with a door piston guided in a housing and operable to control movement of a rod connected to a door assembly, and a force-storage device in the form of a spring which, during an opening process of the door, supplies the necessary energy for the subsequent automatic closing process, characterized in that the door closer, depending on the travel and the direction, has at least two different multiplication ratios and hence different moment curves, with coupling between the opening force and the closing force being thereby selectively eliminated.
A door closer assembly comprising:
A method of operating a door closer assembly having a housing, a door piston movably guided in the housing and operable to move a door, a spring piston movably guided in the housing and operable to assist the movement of the door piston at least in a door closing direction, and a hydraulic circuit containing hydraulic fluid in said housing, said method comprising eliminating a coupling between the spring piston and the door piston with said hydraulic fluid for portions of a door opening and a door closing movement.
A door closer assembly comprising:
Dependencies are inferred from the claim text.