Patent ID: 8727389
Filing Date: 2014-05-20
Classification: F16L,F23D,Y10T

Abstract:
1. A coupling comprising: a female coupling part having a central bore opening to an axial end face thereof, and a locking ring having a non-circular aperture axially aligned with said central bore, the non-circular aperture comprised of a straight portion and a rounded portion, the straight portion defining a radially inwardly extending shoulder; a male coupling part having external screw threads located on an outer surface thereof for engagement with corresponding female screw threads of a an associated threaded component when not coupled with the female coupling part, the male coupling part having a non-circular cross-sectional shape along at least a portion of its axial length including said external screw threads, said non-circular cross-sectional shape of the male coupling part including a flat portion and a rounded portion corresponding to a shape of said non-circular aperture, the male coupling part further including a radially extending flange; wherein when the straight portion of the non-circular aperture of the locking ring and the flat portion of the male part are aligned, the male coupling part is slideably insertable into the bore of the female coupling part to a position where the radially extending flange of the male part is located axially inward of the locking ring of the female part, and wherein subsequent rotation of the male part relative to the female part engages the radially extending flange of the male part with the shoulder of the female part thereby interlocking the male part and the female part to restrict withdrawal of the male part from the female part.