Patent ID: 8429803
Filing Date: 2013-04-30
Classification: F16L,F24F,Y10T

Abstract:
1. A method of connecting two pieces of HVAC circular ductwork during installation of the HVAC ductwork comprising: (a) providing a plurality of circular ductwork, the circular ductwork having: (b) inserting the male end on a first piece of the provided circular ductwork into a corresponding female end on a second piece of the provided ductwork; (c) engaging the push-lock male transverse lock on the male end of the first piece of provided circular ductwork with the corresponding push-lock female transverse positioning lock on the female end of the second piece of provided circular ductwork thereby connecting two pieces of circular ductwork so that the two pieces of circular ductwork do not slide apart and become disconnected without disengagement of the push-lock male transverse positioning lock on the male end of the first piece of provided circular ductwork from the push-lock female transverse positioning lock on the female end of the second piece of provided circular ductwork; and (d) inserting a fastener through at least one dimple and into the male end.