Patent ID: 6981721
Filing Date: 2006-01-03
Classification: F16L

Abstract:
1. A coupling for high-pressure fluid comprising: a pipe having an inverse male screw near an end thereof; a bush having a larger diameter than that of said pipe, said bush being screwed to the inverse male screw; a box nut having a larger diameter hole, through which said bush can pass, on a tip end side, and a small diameter hole, through which the pipe passes, on a base end side; a block having a female screw hole that is screwed to said box nut; a fluid route opened at a bottom portion of the female screw hole of the block; a washer made of soft material, said washer being inserted in an accommodating space at an end portion of the fluid route on the female screw hole side; and a ring being screwed to a female screw of the female screw hole to support said washer at a predetermined position, said ring having a polygonal hole for supporting an end portion of the pipe which passes the box nut and of which end face abuts the washer.