Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F41
WEAPONS
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F41H
ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
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F41H7/02
Land vehicles with enclosing armour, e.g. tanks
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F41H7/03
Air-pressurised compartments for crew; Means for preventing admission of noxious substances, e.g. combustion gas from gun barrels, in crew compartments; Sealing arrangements
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F41H7/035
Gratings for ventilation openings
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F41H7/035

Device for venting air from or supplying air to a room
11156437 · 2021-10-26 · ·

The invention relates to a device for venting or supplying air to a room, said room being delimited by walls. The room is completely surrounded by the walls and has a ventilation system for supplying an airflow in order to exchange the air in the room with the air outside of the room. For this purpose, the closed room is interrupted by an opening through which the airflow can enter or exit the room. The opening is then covered by at least three perforated plates, wherein the perforated plates are arranged in a layered manner relative to one another, and the perforated plates have two different degrees of hardness.

DEVICE FOR VENTING AIR FROM OR SUPPLYING AIR TO A ROOM
20190346238 · 2019-11-14 · ·

The invention relates to a device for venting or supplying air to a room, said room being delimited by walls. The room is completely surrounded by the walls and has a ventilation system for supplying an airflow in order to exchange the air in the room with the air outside of the room. For this purpose, the closed room is interrupted by an opening through which the airflow can enter or exit the room. The opening is then covered by at least three perforated plates, wherein the perforated plates are arranged in a layered manner relative to one another, and the perforated plates have two different degrees of hardness.