Importance

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Abstract

A fluid-tight union for reversably interconnecting lengths of coaxial pipe includes: a first annular fitting, having a circumferential flange, attachable to a connection end of a first length of pipe; a second annular fitting, having a circumferential shoulder, attachable to a connection end of a second length of pipe; a clamping collar comprised of arcuate segments which incorporate both an inwardly-angled clamping ledge that engages an overhanging step on the circumferential shoulder of the second annular fitting and at least one internal, inwardly-angled, spiral, circumferential thread spaced apart from the clamping ledge; and a retainer ring sized so as to be slidable over the first annular fitting, and rotatable against the rear face of the circumferential flange, the retainer ring incorporating external, spiral, circumferential threads that are angled away from the flange, the external threads of the retainer ring engaging the internal threads of the clamping collar to draw the clamping ledge and engaged second annular fitting against the flange as the retainer ring is rotated in a thread engaging direction.

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First Claim