| 摘要 |
A self-returning damped hinge comprising: a housing 3 having a bore 11 in which is rotatably mounted a spindle 6; within the housing is mounted a closing arrangement 14 which includes a closing piston 18 with projection 19 spring biased into contact with a first centering cam surface 26 on the spindle to urge the spindle into a first position, e.g. closed or centered, and a damping arrangement which includes a working fluid and a damping piston 32 with projection 44 biased into engagement with a second centering cam surface 45 on the spindle to damp the rate at which the spindle rotates toward the first position; the damping piston and closing piston guided for movement radially of the spindle. The damping piston head has a non-return valve allowing fluid flow from a second chamber 39 defined by an external face of the piston, spindle and bore to a first chamber 38 defined by an internal face of the piston, and cylinder 34, preferably a fluid return channel 41, 42, includes an adjustment screw 40. The spindle locates in a mount 5 attached to a supporting surface. The pusher head and piston surfaces may be flat or preferably concave or convex to reduce wear. The spindle may have stop surfaces to hold a door in an open position. |
