| 摘要 |
<p>The invention relates to a door closer comprising a shoulder(110)-type piston (100) acting upon a driven shaft, a pressure build-up piston (200) and an energy accumulator (30), the pistons (100, 200) being axially guided inside a housing (1). The door closer is also fitted with a first (D1) and a second (D2) pressure chambers connected to an overflow hose and combined with the door piston (100), with a middle pressure chamber (D3) combined with both the shoulder (110) and the pressure build-up piston (200), and at least with one additional pressure chamber (D4, D4*) possibly presenting a choke, while the pistons, or the housing, all have channels for interconnecting the pressure chambers, and while the door piston (100), which is not only interlocking with the door piston due to the offset shoulder (110) in the hand of door (4), but also operatively linked with it- first hydraulically, then mechanically - in the direction of closure, leaves the possibility of hydraulic decoupling from the pressure build-up piston.</p> |
