Patent ID: 8695218

Claim:
A joint construction for coupling conduit sections, comprising: first and second conduit sections having coaxially overlapping end areas, the end area of the first conduit section having a diameter that is larger than a diameter of the end area of the second conduit section; a coupling member engaged with the end area of the first conduit section, the coupling member including: a first end dimensioned to be received within the end area of the first conduit section and a second end having external threads; a bore dimensioned to receive said second section end area; and a plurality of protrusions on an outer surface thereof engaged with a plurality of complimentary features on the end area of the first conduit section, the plurality of protrusions and plurality of complementary features formed by simultaneously outwardly deforming the coupling member and the end area of the first conduit section; a gland nut having threads configured to engage the external threads of the second end of the coupling member; and a washer disposed on the second conduit section between the second end of the coupling member and the gland nut, the washer configured to engage the end area of the second conduit section to resist relative axial movement between the first and second conduit sections.