Fluid coupling

Claim 1

A fluid coupling which comprises: (a) conduit means (10, 20) with an enlarged section (10A, 20A) having a first outside cross-sectional width and having at one end (10C, 20C) a reduced section (10B, 20B) with a cylindrical exterior surface which has an outside diameter smaller than the width of the conduit means and with a truncated conical shoulder (10D, 20D) between the sections; (b) connector means (12, 22) mounted on the cylindrical surface adjacent the one end with (1) a first cylindrical interior opening (12A, 22A) adjacent a first end (12E, 22E) of the connector means having a first inside diameter to provide a precision rotational fit with a portion of the reduced section of the conduit means and (2) an enlarged second opening (12B, 22B) adjacent a second end (12F, 22F) of the connector means opposite the first end, the second opening being larger than the outside diameter of the exterior surface of the reduced section and smaller than the width of enlarged section of the conduit means, the connector means having an exterior threaded surface (12C, 22C) adapted to fit a mating threaded opening and having an exterior wrench engaging surface (12D, 22D) for threading the connector means into the threaded opening such that there is a sealed fluid connection with the conduit means; (c) retaining means (10F, 23) for rotatably holding the conduit means and connector means together such that the shoulder abuts the connector means adjacent to second end; and (d) seal means (11, 21) between and in sealing engagement with the exterior surface of the conduit means and the interior surface of the connector means.