Abrégé

A connecting piece for a duct (5), preferably a ventilation duct, and comprising an inner flow space (6) in communication with the interior of the duct, the connecting piece having at least one joining portion (2) on which an end region of the duct is slidable and fixable, wherein the connecting piece includes a compressed fibre material and a binder, that the connecting piece displays a substantially configurationally stable portion (1) in association with the joining portion (2), and that the connecting piece displays, at least interiorly, a layer which is impervious to a fluid, in particular a gas, this layer being adjacent the inner flow space (6) of the connecting piece.

Classes IPC  ?

• F24F 13/02 - Dispositions pour conduire l'air

Abrégé

A ventilation duct is produced from a fiber material and has a quadrangular, open and self-supporting cross section that can be compressed to a flat state by the presence of bending lines (5, 6) in the corner areas of the duct. The walls (1-4) of the duct have transverse relatively soft parts (7), stiffening parts (8) and likewise transverse hinge parts (9), all made from the fiber material of the duct. In order to be able to change the construction height of the duct, the cross-sectional shape can be converted from quadrangular to hexagonal owing to the fact that the two opposite walls (3, 4) have longitudinal folding lines (10). To keep the duct in its hexagonal shape it has a number of external or internal shape-holding elements (11) that can also be fastening or suspension means to the duct.

Classes IPC  ?

• F16L 9/00 - Tuyaux rigides
• F16L 9/21 - Tuyaux rigides constitués de matériaux absorbant le son ou avec une structure absorbant le son
• F16L 11/02 - Manches, c.-à-d. tuyaux flexibles en fibres ou en fils, p. ex. textiles
• F24F 13/02 - Dispositions pour conduire l'air

Abrégé

The present invention relates to a duct means (1) for an air flow or for a gas flow and a method for manufacturing, handling and mounting said duct means (1). The invention will replace ducts of steel and thus having enough restraint towards flexure to be hung without any substantial flexure in connection to a mounting procedure. The advantages are, besides of an essential reduction in price per meter installed duct, that it makes manufacturing, handling and mounting easier as well as transportation and storing as the duct (1) can be folded or rolled in a flattened and space saving condition. The duct (1) can be bent in a mounted position, i.e. be allowed to be changed in direction having a minimum radius of about 1000 mm.

Classes IPC  ?

• F24F 13/02 - Dispositions pour conduire l'air
• F16L 11/02 - Manches, c.-à-d. tuyaux flexibles en fibres ou en fils, p. ex. textiles
• F16L 9/17 - Tuyaux rigides obtenus par cintrage longitudinal d'une feuille et raccordement des arêtes
• E21F 1/04 - Conduites d'air