Ventilation duct to be inserted into stored cereals or similar goods, comprising outer rings or integrated circular elevations

摘要

The duct is assembled of several telescopically arranged segments (1a, 1b, 1c) with a perforated upper area (2a, 2b, 2c) and is connected to an air supply duct (11) with one end. Each of the segments (1a, 1b, 1c) is fitted with a flat reinforcing ring (4), which can be additionally provided with two v-shaped stands (7). When the segment (1a, 1b, 1c) is pulled at one end the rings (4) cause the adjacent segment (1a, 1b, 1c) to follow. The mantle of each of the segments (1a, 1b, 1c) can also be provided with an integrated circular elevation in order to create the same effect.