Compression fitting

Abstract: A compression type end fitting for a non-metal flexible tubing wherein the fitting includes a tubing receiving bore terminating at an internal stop shoulder with a continuing smaller diameter throughbore, a nut sub-assembly of a nut and compression sleeve having a nut receiving throughbore has a tubing reinforcing insert loosely retained within the body and nut sub-assembly when the latter are preassembled preparatory to receiving the tubing through the nut sub-assembly. The insert has a circular flange for loosely retaining the insert within the fitting body bore and has a guide end protruding outwardly of the nut sub-assembly when the latter is assembled to the fitting body to provide for an initial engagement with the tubing and for a prealigning of the tubing, insert and nut sub-assembly throughbore preparatory to pressing the tubing into the fitting and final tightening of the nut sub-assembly on to the fitting.

Abstract: An improved connector has a flexible braided metal hose assembly with a compression fitting or pipe fitting at one end and a special composite fitting assembly with an electrically insulating insert in a metal male outer fitting at the other end for connection to the water line of an appliance, such as a hot water heater.

Abstract: A tube connector for sealing a flareless tube to a fitting having a flat sealing face perpendicular to the fitting axis. The tube connector incorporates a ferrule engaged by a sleeve mounted on the end of the tube and having a flat radial surface for engaging the fitting sealing face. The ferrule is deformable and establishes a primary wedge type metal-to-metal sealing engagement with the tube by a compression nut threaded upon the fitting. The ferrule radially bows under axial and radial compression and this deformation suppresses vibration while the shape of the ferrule end engaged by the nut increases the radial forces on the ferrule as the nut is tightened to provide firm tube support remote from the seal region. The sleeve is provided with an internal undercut adapted to outwardly flare the end of the tube to lock the tube to the sleeve, and radially support the tube end as the tube is compressed during connection.

Abstract: The invention pertains to a nut (400) and ferrule assembly (300) for use in joining tubing to a fitting. The ferrule (300) has a male member which interlocks with a nut (400) and freely rotates within the nut (400). The interlock reduces the number of parts necessar to be handled, eliminates the need for the nut (400) to be of the same material as the ferrule, reduces the possibility of flow restriction or tubing deformation associated with rotation of the ferrule (300), and aids in the removal of the ferrule (300) from the detail when removal is desired.