公开(公告)号：US20230003333A1

公开(公告)日：2023-01-05

申请号：US17783751

申请日：2020-12-11

Applicant: ROCKWOOL A/S

Inventor： Kurt Munk Pedersen ,  Jürg Dieter Stefan Rödenberger ,  Markus Thoma

IPC: F16L57/04 ,  F16L59/12 ,  F16L59/14 ,  F24F13/02 ,  F16L5/04 ,  F16L59/04 ,  F16L9/00 ,  F16L9/17 ,  F24F11/33

Abstract: A ventilation duct for a fire rated ventilation duct wall penetration has one or more metal sheets forming said duct, wherein said metal sheet duct is covered on the outside by a heat insulating material, and said duct includes elongated stiffening members located on the outside of the duct and attached to said metal sheets. The stiffening members each comprises a metal profile and at least one non-combustible bar of inorganic material. The metal profile is fixed to the metal sheet of the duct and retains the non-combustible bar by at least partly encircling the bar.

公开(公告)号：US12247689B2

公开(公告)日：2025-03-11

申请号：US17783751

申请日：2020-12-11

Applicant: ROCKWOOL A/S

Inventor： Kurt Munk Pedersen ,  Jürg Dieter Stefan Rödenberger ,  Markus Thoma

IPC: F16L57/04 ,  F16L5/04 ,  F16L9/00 ,  F16L9/17 ,  F16L59/04 ,  F16L59/12 ,  F16L59/14 ,  F24F11/33 ,  F24F13/02

Abstract: A ventilation duct for a fire rated ventilation duct wall penetration has one or more metal sheets forming said duct, wherein said metal sheet duct is covered on the outside by a heat insulating material, and said duct includes elongated stiffening members located on the outside of the duct and attached to said metal sheets. The stiffening members each comprises a metal profile and at least one non-combustible bar of inorganic material. The metal profile is fixed to the metal sheet of the duct and retains the non-combustible bar by at least partly encircling the bar.