Craig T Pahnke

US Patent:

44808593, Nov 6, 1984

Filed:

Jun 28, 1982

Appl. No.:

6/392555

Inventors:

Todd J. Rueckl - Luxemburg WI
Craig T. Pahnke - Denmark WI

Assignee:

W. R. Grace & Co. - New York NY

International Classification:

F16L 2700

US Classification:

285163

Abstract:

A flexible connector for flat wall sheet metal ducting comprises an elongated sleeve duct of rectangular cross-section and a pair of connector ducts, each having an end portion telescoped into an end portion of the sleeve duct with the walls of the connector duct in widthwise parallel inwardly spaced relation to respective walls of the sleeve duct. A resiliently compressible gasket is secured in the sleeve duct near each end thereof, surrounding and compressed against the adjacent connector duct, which is slidable in the gasket so that the sleeve duct can swing in a pair of opposite directions relative to the connector duct. Each of a pair of opposite walls of each connector duct has an exterior surface defined by a false wall which is arcuately curved along its length concentrically to the axis about which the sleeve duct swings. To confine the sleeve duct against substantial lengthwise displacement relative to the connector ducts, each connector duct has abutments near said axis, engaging end edges of sleeve duct walls that extend widthwise in said opposite directions.