PH22014000081U3 - Improved plastic pipe coupling - Google Patents

Abstract

This utility model disclosed an improved plastic pipe coupling with no loose components. Plastic pipe coupling comprises a stepped tubular body member and a coupling nut member. Tubular body member has its smaller and bigger end portions provided with external threads and its intermediate portion provided with parallel holding ribs. Tubular body member has stepped axial bores with the intermediate bores defining therein inner and outer shoulders. Coupling nut member is provided with internally threaded bore and conically shaped bore defining therein inner and outer shoulders. Coupling nut member has internal threads adapted to be screwed on tubular body member. Pipe grip insert is provided in conical bore. Pipe grip insert has a cut-out portion to allow contraction when pressed along the conical bore and annular pipe gripping ribs at the inner surface thereof. A sleeve pusher is provided in the internally threaded bore. Conical pipe grip insert has an annular flange at the inner end thereof adapted to engage on outer shoulder of coupling nut member and the sleeve pusher is provided with an O-ring gasket attached on inner end thereof which in turn is seated on shoulder of tubular body member.