Title:
INSULATED VENTILATION DUCT COMPONENT AND METHOD OF PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/1993/011327
Kind Code:
A1
Abstract:
An insulated ventilation duct component having at least two connection openings for coupling to other components in a ventilation installation is disclosed. The duct component, comprising an external metal sheet casing (1), an internal insulating material layer and an internal metal sheet coating, forms a unitary, stable and fire isolating unit. The external and internal metal sheet casings are mutually connected by means of one ore more perforated metal sheet elements (2a etc., 2'a etc.), which cover the corresponding end surface of the insulating material layer (6a etc.) and which has a reduced capacity of conducting heat between the inside and the outside of the duct component by way of the perforations.
Inventors:
BERGSTROEM AAKE (SE)
Application Number:
PCT/SE1992/000827
Publication Date:
June 10, 1993
Filing Date:
November 27, 1992
Export Citation:
Assignee:
FLAEKT AB (SE)
International Classes:
E04F17/04; F16L59/14; F24F13/02; (IPC1-7): E04F17/04
Foreign References:
| SE372811B | 1975-01-13 | |||
| DE2718839A1 | 1978-11-02 | |||
| DE3925781A1 | 1991-02-14 | |||
| US2108159A | 1938-02-15 |
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