Patent ID: 8517288
Filing Date: 2013-08-27
Classification: F16L

Abstract:
1. A swivel fitting for use in coupling to first and second components in a system that transfers a fluid under pressure, where at least the first component has a concave annular surface through which a coupling can be made, the swivel fitting comprising: a body having a fluid passage extending from a first end to a second end; an internally threaded fastening sleeve received over the first end capable of receiving and mating with an externally threaded end of the first component; the first end having an end face, an external surface, and an internal surface; the end face being an annular flat surface, the external surface being a convex annular surface, and the internal surface being an annular chamfer surface that defines a portion of the fluid passage; and a connector for coupling the second end to the second component; wherein the convex external surface of the first end engages the concave annular surface of the first component, thereby, establishing a region of contact; the region of contact being axially spaced along said convex external surface of the first end and said concave annular surface of the first component to define a radially expanded portion of the fluid passage at the juncture of said first component and said first end; the axial spacing of said region of contact providing a portion of said concave annular surface of the first component and a portion of the convex external surface of said first end forming the radially expanded passage portion of the fluid passage wherein interference with flow through the passage is minimized. wherein the region of contact forms a static seal between the swivel fitting and the first component.