Tube connector systems

A connector system comprising:

• a tube fitting body defining a longitudinal axis adapted to receive an end of a tube;
• a union nut rotatably coupled to one end of the tube fitting body;
• and
• a cutting ring engaged with both the tube fitting body and the union nut, the cutting ring comprising:
• an inner surface configured to be positioned against the tube;
• an outer surface facing the tube fitting body and/or the union nut, the outer surface comprising a protruding collar having a radial surface with an annular groove defined therein and a circumferential transition area directly adjacent the annular groove, wherein the annular groove has an inner side wall that is coplanar with the transition area, the inner side wall and the transition area angled radially inward relative to the longitudinal axis such that the transition area is positioned radially outward relative to the inner side wall;
• and
• an elastomeric seal disposed at least partially within the annular groove.

A tube connector system comprising:

• a tube fitting body having an end with exterior threads and a first inner frustoconical bore, the end comprising a radial stop surface, wherein the end is configured to receive an end of a tube;
• a union nut threadably engaged with the exterior threads and having a second inner frustoconical bore;
• and
• a cutting ring comprising:
• a first end having an outer surface that tapers radially outward engaging with the first inner frustoconical bore and at least one cutting edge;
• a second end having an outer surface that tapers radially inward engaging with the second frustoconical bore;
• and
• a middle section disposed between the first end and the second end, an axial annular groove is defined in the middle section and faces the radial stop surface of the tube fitting body, the axial annular groove includes an inner side wall, an outer surface of the middle section adjacent the annular groove defines a transition area that is coplanar with the inner side wall, and the inner side wall and the transition area each taper radially inwardly in a direction towards the second end;
• and
• an elastomeric seal disposed at least partially within the annular groove,
• wherein upon tightening of the union nut on the tube fitting body, the union nut engages with the second end of the cutting ring to drive axial movement towards the tube fitting body so that the first end of the cutting ring radially compresses around the tube and the elastomeric seal engages with the radial stop surface.