Patent ID: 7497772
Filing Date: 2009-03-03
Classification: F16L,F24F

Abstract:
1. A two piece quick change flow duct for creating a branch circuit comprising: a two part duct branch and plate holder for attachment to a primary duct and for diverting flow therefrom; the duct branch comprises a first lower base portion and a second upper nozzle portion matingly engaging the first lower base portion, the first lower base portion includes a first open faced U-shaped base plate holder portion that is integral with the lower base portion of the duct branch, the second upper nozzle portion including an open faced U-shaped nozzle plate holder having a cross section dimension that is less than the cross sectional dimension of the open faced U-shaped base plate holder, the first and second open faced U-shaped plate holders removeably matingly engaging each other in a snap fit to form a plate holder snug fit plate holder slot, said slot is closed on three sides, comprising reinforcing ribs on flanges, transverse to the flow path, for removeably receiving a restrictor plate in a snug fit, said lower base portion having a concave surface complimentary with the primary duct for sealingly matingly engaging and mounting to the primary duct (