| 摘要 |
A door is held open by mechanically stopping the piston (1) of the closer from moving in a damping chamber. A conical member (3) urges balls (2) radially outwardly from within the piston against the wall (25) of the chamber between the piston (1) and an axially adjustable abutment sleeve (10) to stop the piston. The balls can be released by pressing the conical member out of engagement therewith and this is done, via a tappet (5), by means of a control sleeve (40) movable in the abutment sleeve (10) under the force of a spring (11). The control sleeve (40) can be locked in the door holding position by a bolt member (46) moved by a solenoid (22) and acting on a two-armed latch (42), one arm in the locking position abutting a port (44) of the abutment sleeve (10) and the other arm abutting a surface (58) of the bolt member (46). <IMAGE> |
