Title:
FABRIC FLOW RESTRICTION AND METHOD FOR RESTRICTING A FABRIC DUCT
Document Type and Number:
WIPO Patent Application WO2002035129
Kind Code:
A3
Abstract:
A fabric flow restriction and method for adjusting the flow resistance through a fabric duct (12, 14, 16, 18 and 20) enables balancing the airflow through a network of fabric ducts. The fabric ducts are air permeable and/or include discharge openings that evenly disperse supply air from within the duct to a room being heated, cooled, ventilated, or otherwise conditioned by the air. Disclosed embodiments include flow restrictions (28, 30 and 32) that are adjustable by tightening a drawstring (90) that constricts an annular web disposed within the duct or inside the duct, or by interchanging fabric meshes (38) or various flow resistance. In any case, the flow restriction consists of flexible fabric that tends to conform to the changing shape of a fabric duct as the duct alternately inflates and deflates due to changes in air pressure within the duct.
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Inventors:
PASCHKE NICOLAS B
Application Number:
PCT/US2001/043040
Publication Date:
July 18, 2002
Filing Date:
October 22, 2001
Export Citation:
Assignee:
RITE HITE HOLDING CORP (US)
International Classes:
F16L55/027; F24F13/06; (IPC1-7): F24F13/06
Foreign References:
| DE2227630A1 | 1973-12-20 |
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