Patent ID: 6442793
Filing Date: 2002-09-03
Classification: A47L

Abstract:
A duct coupling assembly for a floor care machine, comprising:a first duct having a first passage and a first engagement end including an outer surface having an external thread disposed thereon and a locking tab projecting outwardly from the outer surface; a second duct having a second engagement end slideably engaged into the first passage and including a second passage in fluid communication with the first passage; a flexible seal disposed about the second duct and being positioned proximate the first engagement end of the first duct; and a collar having a hole therethrough, the second duct projecting through the hole, the collar at least partially surrounding the seal and the first engagement end of the first duct, the collar including an internal thread threadedly engaged with the external thread, and a sealing surface proximate the internal thread and at least partially engaged against the seal and pressing the seal into an approximately sealing engagement against the second duct and the first engagement end of the first duct, the collar further including a locking surface frictionally engaged with the locking tab and inhibiting a disengaging movement of the collar.