Swinging latch for door opener has pivoted lever with loading spring under compression and sector gear and pinion driving damper vanes inside cylindrical chamber

摘要

The door opener has a pivoted latch (1) with a hooked end (3) it is fastened to a spring-loaded (4) lever (2) in a housing (5) containing a pivot (6). Teeth of a sector gear (7) on the lever mesh with a pinion (9) driving a rotational damper (8). The damper has rotating vanes (11) inside a cylindrical housing (10). The latch may be joined to the lever by a toothed arrangement.