Hermetic compressor discharge tube joint construction

Claim 1

In a hermetic compressor the combination of a cast iron cylinder head containing a high side discharge chamber and a discharge passageway extending from said chamber to an exterior surface of said head exposed to the interior space within a hermetic casing of said compressor, said passageway having an imperforate wall defining a cylindrical bore of constant diameter terminating at its inner end at an internal shoulder in said passageway and terminating at its outer end at a tapered mouth extending between said outer end of said bore and said exterior surface and diverging toward said exterior surface, a tubular steel discharge conduit having one end thereof extending from the interior casing space in telescoping relation into said passageway via said mouth, said conduit having a first cylindrical seal portion at its inner end engaging said wall with an interference fit and abutting said internal shoulder, said conduit having a second cylindrical seal portion also engaging said wall with an interference fit adjacent said mouth, said conduit having a third portion of smaller outside diameter than said first and second seal portions and extending axially of said conduit between said seal portions for a distance of at least about 1 inch, said third portion defining an annular clearance space radially between its outer periphery and said bore wall and axially from said first to said second seal portions, the outer peripheries of said first, second and third conduit portions being imperforate, and an anaerobic curing adhesive sealant in a solid, cured state filling said clearance space and adherently engaging said bore wall and said third portion and forming a high pressure sealing gasket in said clearance space, said tapered mouth defining with the exterior of said conduit extending therethrough an annular well extending coaxially of and concentrically around said conduit and communicating with the outer periphery of said conduit, said well having a volume adapted to hold a sufficient quantity of adhesive in a liquid state to fill said annular clearance space said second seal portion closing communication between said clearance space and said well.