Patent ID: 6089623
Filing Date: 2000-07-18
Classification: F16L

Abstract:
A fluid coupling, comprising;a first pipe member having an externally threaded end, said threaded end having a first externally threaded portion of predetermined diameter extending a predetermined distance and a second externally threaded portion having a predetermined diameter greater than the diameter of said first threaded portion and extending axially adjacent thereto so as to form a stepped portion;a second pipe member having a first end of predetermined length and diameter and configured to be received within said first pipe member and a stepped portion disposed a predetermined distance from said first end, the stepped portion of said second pipe have a diameter greater than that of said first end;said second pipe member having an upset circumferentially extending from a surface of said stepped portion by a predetermined distance; anda nut loosely and rotatably fitted around the circumference of said second pipe and having an internally threaded portion for mating engagement with the externally threaded portion of said first pipe member, said internally threaded portion having a first internally threaded portion and a second internally threaded portion, said first and second internally threaded portions being synchronized in the axial direction, said nut further including a rear face having an aperture therein, said aperture having a diameter greater than said stepped portion of said second pipe member and less than the diameter of said upset so that said upset prevents disengagement of said second pipe member from said first pine member after said nut is rotated over said first end portion of said first pipe.