Door closer with drive for closing door casement has spring piston and damping piston mounted rotationally secured relative to stroke cam plate through interaction with drive housing

摘要

The drive includes a spring piston (3a) and damping device for damping the closing and opening movement. The piston and/or damping piston (5a, 5b) is/are mounted relative to the stroke cam plate (22a, 22b) so that they cannot rotate through the positive interaction of the spring piston and damping piston or parts of the damping piston with the drive housing (11) or a part mounted with force locking or keyed engagement in the drive housing. The spring piston and/or damping piston can be stepped pistons.