Patent ID: 8366470

Claim:
A connector comprising: a housing having a fit-on tube with two opposed substantially planar walls and two opposed curved walls extending between the planar walls so that said fit-on tube defines a substantially oblong cross-section, the fit-on tube having opposite front and rear ends and an outer peripheral surface extending between the ends, an annular holding groove formed in the outer peripheral surface at a position between the front and rear ends and on a part of the housing that will be inserted into a mating connector, engaging grooves in the outer peripheral surface of the fit-on tube at the planar walls and extending rearward from the annular holding groove, each of said engaging grooves having two opposed flat surfaces aligned substantially perpendicular to the substantially planar walls, an outwardly facing bottom surface that is deeper than a bottom surface of said annular holding groove and a rearwardly facing front surface extending substantially perpendicularly from the bottom surface of the annular holding groove to the bottom surface of the engaging groove; and a sealing ring mounted on the annular holding groove, rotation-stopping projections projecting rearward from said sealing ring and into engagement with the flat surfaces of the respective engaging grooves and an inwardly projecting engaging claw at a rear end of each of the rotation-stopping projections and configured for fitting substantially on the bottom surface and the front surface of the respective engaging grooves.