Door operator
AssigneeDorma Deutschland GmbH
InventorsVolker Bienek, Alexander Hellwig
Life of this patent
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Abstract
A door operator includes a housing and at least one linearly guided piston in the housing. A roller carrier is disposed in the piston and includes a rotatably movable supported pressure roller. The piston is formed as a deep drawn structural component and includes a bottom and a circumferential walling. The support and the axial guiding of the roller carrier with a pressure roller within the piston can be realized in a simple and cost effective manner. Furthermore, an aperture is provided in the bottom of the piston, through which the pressure roller protrudes to the outside beyond the bottom of the piston.
Claims15
A door operator comprising:
- a housing and at least one linearly guided piston disposed in the housing, a roller carrier disposed in the piston and including a rotatably movable supported pressure roller, wherein the piston is formed as a deep drawn structural component and includes a bottom and a circumferential walling, an aperture is provided in the bottom of the piston and the pressure roller projects outwardly beyond the bottom;
- and a spring extends into the piston and is configured to move the piston towards a cam which is attached to a pivoting axis for a door assembly.
Dependencies are inferred from the claim text.