Patent ID: 7140647

Claim:
A fluid coupling comprising a first and a second coupling member having respective fluid channels in communication with each other, an annular gasket interposed between butting end faces of the two coupling members, and screw means for connecting the two coupling members together, each of the coupling members being provided in the butting end face thereof with an annular recessed portion surrounding the fluid channel thereof and having an annular projection formed in a bottom face of the recessed portion, the gasket comprising a sealing portion having an outside diameter smaller than a diameter of the recessed portion and positioned between the annular projections of the two coupling members, and a guide having an outside diameter permitting the guide to be fitted into the recessed portion and positioned externally of the sealing portion, the butting end faces of the two coupling members being movable into contact with each other when the coupling is tightened up properly, wherein the sealing portion has an annular groove formed in an outer periphery thereof, and the sealing portion and the guide are connected together by a snap ring fitted in the annular groove.