Patent ID: 7984934

Claim:
A tube purge coupling fitting, for coupling tubular copper gas transporting sections of a gas delivery line together by brazing, comprising: a tubular member having no threads associated therewith and having an inlet section for containing a first copper tube section slip fitted therein without threads and having an outlet section for containing a second copper tube section slip fitted therein without threads; said tubular member having a central section, positioned between said inlet section and said outlet section said tubular member having an internal diameter of substantially the same diameter throughout; a raised portion on said central section of said tubular member; at least one gas purging orifice located in said raised portion and passing through said tubular member for directing purging gases from within said tube purge coupling fitting directly into the atmosphere; and a concave portion surrounding only said gas purging orifice, said orifice being centered within said concave portion.