Patent ID: 9182061
Filing Date: 2015-11-10
Classification: F16L

Abstract:
1. A pipe joint comprising a pressing nut into which a pipe is inserted, a joint body into which said pressing nut is partially inserted, a sealing member for sealing said pipe and said joint body, a retainer engaging said pipe to prevent said pipe from being attached, a stop ring, and an engaging mechanism for keeping said pressing nut in said joint body; said engaging mechanism comprising a first engaging groove and a second engaging groove, and an annular groove formed on an outer surface of said pressing nut for receiving said stop ring, wherein said first engaging groove and said second engaging groove are formed on an inner surface of said joint body for receiving said stop ring and communicating with each other; and each of said first engaging groove and said second engaging groove having a tapered groove, both tapered grooves adjacent to each other forming an annular projection having both inclined side surfaces, and said stop ring being movable in both directions between said first engaging groove and said second engaging groove passing said annular projection, whereby said stop ring engages both of said annular groove and said first engaging groove until the connection of said pipe is completed, and when a force in a drawing direction is applied to said pipe after completing the connection of said pipe, said stop ring moves from said first engaging groove to said second engaging groove on the inlet side thereof and said stop ring engages both of said annular groove and said second engaging groove, so that said pressing nut is drawn from said joint body to such an extent that the normal connection of said pipe can be confirmed.