Patent ID: 6857665

Claim:
A fitting assembly for connection to a connector having a rearward sealing surface, the assembly comprising: a generally annular coupler extending intermediate a first forward end and a first rearward end, and having a first inner peripheral surface and a first outer peripheral surface, and a series of first engagement portions disposed circumferentially about at least a section of the first outer peripheral surface, the first outer peripheral surface having a circumferential first groove formed therein intermediate the first rearward end and the first engagement portions, the first groove having a rearward end wall and a forward end wall; and a generally annular nut receivable coaxially over the first outer peripheral surface of the coupler, the nut extending intermediate a second forward end rotatably threadably engageable with the connector and a second rearward end, and having a second inner peripheral surface and a second outer peripheral surface, and a series of second engagement portions disposed circumferentially about at least a section of the second inner peripheral surface, and the nut having a thrust surface extending radially inwardly from the second inner peripheral surface, whereby with the nut second rearward end being received coaxially over the first outer peripheral surface of the coupler, the nut thrust surface is receivable within the groove in a first axial position of the nut intermediate the rearward and forward end walls thereof with the first and second engagement portions being interferingly engaged such that the coupler first forward end is drawn towards the connector sealing surface as the nut second forward end is threadably engaged with the connector, and in a second axial position of the nut in abutting contact with the groove forward end wall as the nut second forward end is further threadably engaged with the connector urging the coupler first forward end into a sealing engagement with the connector sealing surface, whereby with the coupler first forward end being engaged with the connector sealing surface, the first and second engagement portions are interengaged delimiting the rotation of the nut relative to the connector.