| 摘要 |
A connector for attaching a cylindrical flareless tube (22) having an end and an end region to a tubular fitting (10) having an axis, an externally threaded portion (20) and a sealing face (14) comprising, in combination, a sleeve (28) having an axis adapted to be placed over the end region of the tube, said sleeve including a rearward facing end and a forward facing end (42) defining a sealing face adapted to be located in an opposed axially aligned relationship to the fitting sealing face, an annular rearwardly facing recess (46) defined internally within said sleeve adjacent said forward facing end for receiving the end of the tube and establishing a metal-to-metal sealing relationship therewith, a conical surface (44) defined in said rearwardly facing recess forming an undercut for receiving, supporting and outwardly flaring the tube end, an internal conical cam surface defined upon said sleeve adjacent said rearward facing end, a ferrule (26) having a front portion, a rear portion having an external abutment surface (40), an internal diameter substantially equal to the diameter of the tube, and an external tapered surface adapted to engage said sleeve conical cam surface for deforming said front portion inwardly into a metal-to-metal sealing engagement with the tube's cylindrical surface, a nut (30) surrounding said sleeve and said ferrule having threads adapted to engage the fitting threaded portion, said nut having an internal shoulder (52) adapted to engage said ferrule's abutment surface forcing said ferrule forwardly engaging said ferrule tapered surface and sleeve cam surface and forcing said sleeve sealing face into the fitting sealing face to establish a sealing relationship therebetween. <IMAGE>
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