| 摘要 |
The covering device consists in an aerated grate comprising tabs AL with an automatic and manually controlled rotation angle according to the intensity of rain and/or snow or wind. Tabs AL have a semitubular base profile 1, a baffle plate 2, a dripping plane 3, a vertical wall or plane 4, and a plurality of intermediate planes 5 with upper portions 5A, having bounce-preventing and gutter functions to collect rain in a double gutter frame 7, which rain water is then led into a reservoir 21 which will, due to the increasing weight thereof, lift a counterweight 9 to cause the automatic closing of tabs AL. Alternatively, the tabs may be closed by operating manual lever 16 or by means of a wind operated automatism having an aerodynamic plane 27 being provided with a limit stop rotation angle to allow it to recede from the wind. |
