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Duct joining system

United States Patent

August 28, 2001
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
A duct joining system for providing an air-tight seal and mechanical connection for ducts and fittings is disclosed. The duct joining system includes a flexible gasket affixed to a male end of a duct or fitting. The flexible gasket is affixed at an angle relative to normal of the male end of the duct. The female end of the other duct includes a raised bead in which the flexible gasket is seated when the ducts are properly joined. The angled flexible gasket seated in the raised bead forms an air-tight seal as well as fastens or locks the male end to the female end. Alternatively, when a flexible duct is used, a band clamp with a raised bead is clamped over the female end of the flexible duct and over the male end of a fitting to provide an air tight seal and fastened connection.
Proctor; John P. (Fairfax, CA), deKieffer; Robert C. (Boulder, CO)
Proctor; John P. (Boulder, CO)
09/ 223,044
December 30, 1998
"This invention was made with Government support under contract number DE-AC03-76SF00098 awarded by the United States Department of Energy and CRADA BG-97-352-01. The Government has certain rights in this invention."