초록 ▼

A pipe joint includes a joint body having an internal thread portion formed in the interior thereof, a bush having formed on the outer periphery thereof an external thread portion helically meshed with the internal thread portion of the joint body, a gasket accommodated within the interior of the jo

A pipe joint includes a joint body having an internal thread portion formed in the interior thereof, a bush having formed on the outer periphery thereof an external thread portion helically meshed with the internal thread portion of the joint body, a gasket accommodated within the interior of the joint body, and a retainer having formed on one end thereof on the side of the joint body a flange of increased wall thickness which is pushed toward the joint body by the end face of the external thread portion of the bush. The flange of the retainer may be provided with at least one engaging projection extending radially outwardly from the outer periphery thereof and, in this case, the internal thread portion of the joint body is provided therein with at least one lock portion which is engaged with the at least one engaging projection of the flange.

대표청구항 ▼

A pipe joint comprising in combination: a joint body having an internal thread portion formed in an axial interior portion thereof and a radially extending pipe receiving wall formed at one end of the axial interior portion, said internal thread portion having at least one lock groove formed therein

A pipe joint comprising in combination: a joint body having an internal thread portion formed in an axial interior portion thereof and a radially extending pipe receiving wall formed at one end of the axial interior portion, said internal thread portion having at least one lock groove formed therein, a bush having a pressure application end face formed on one end thereof and a nut portion formed on the other end portion thereof, and also having formed on an outer periphery thereof an external thread portion which is helically engageable with said internal thread portion of said joint body, a ring-shaped gasket composed of an electric insulating material and accommodated within the interior of said joint body with one surface thereof abutted against said pipe receiving wall of said joint body, a retainer composed of an electric insulation material comprising two axial segments jointed together with a thin hinge, said retainer having a flange of increased wall thickness relative to the remainder of the retainer formed on one end thereof and a corrugated portion formed in an inner periphery thereof, and a portion thereof other than said flange having an outside diameter smaller than the inside diameter of said external thread portion of said bush, wherein said corrugated portion of said retainer is engageable with a peripheral corrugation of a pipe, and wherein said flange has an outside diameter smaller than the inside diameter of said internal thread portion of said joint body and larger than the inside diameter of said external thread portion of said bush, and has at least one engaging projection which extends radially outwardly from the peripheral surface thereof and is locked in said at least one lock groove of said internal thread portion of said joint body, is placed towards said joint body when inserted into said joint body, and is pushed by said pressure application end face of said bush.