Lockwireless coupling assembly

A fluid coupling assembly comprising:

• a ferrule member adapted to be connected to a first fluid conduit, the ferrule member comprising a first conduit receiving end and a first engagement end, the first conduit attachment end adapted to receive a first fluid conduit and the first engagement end comprising a first sealing surface, the ferrule member further comprising a plurality of axially extending and circumferentially spaced serrations disposed between the first conduit receiving end and the first engagement end;
• a connector member comprising a second conduit receiving end adapted to receive a second fluid conduit and a second engagement end comprising a second sealing surface adapted to seal against the first sealing surface of the ferrule member, the connector member further comprising external threads disposed adjacent to the second engagement end;
• and
• a nut member which internally receives the first engagement end of the ferrule member, the second engagement end of the connector member, and the serrations of the ferrule member, the nut member comprising internal threads adapted to engage the external threads of the connector member, wherein the first sealing surface is brought into sealing engagement with the second sealing surface as the internal threads of the nut member are made up onto the external threads of the connector member, the nut member further comprising axially extending cantilever members wherein at least one cantilever member comprises an inwardly protruding lock engagement member adapted to engage at least one of the circumferentially spaced serrations of the ferrule member when the first sealing surface is brought into sealing engagement with the second sealing surface.

A fluid coupling assembly comprising:

• a ferrule member adapted to be connected to a first fluid conduit, the ferrule member comprising a first conduit receiving end and a first engagement end, the first conduit attachment end adapted to receive a first fluid conduit and the first engagement end comprising a first sealing surface, the ferrule member further comprising a plurality of axially extending and circumferentially spaced serrations disposed between the first conduit receiving end and the first engagement end, wherein the dimension from the first end engagement end to the plurality of axially extending and circumferentially spaced serrations is greater than 0.15 inch but not larger than 0.30 inch;
• a connector member comprising a second conduit receiving end adapted to receive a second fluid conduit and a second engagement end comprising a second sealing surface adapted to seal against the first sealing surface of the ferrule member, the connector member further comprising external fastening means disposed adjacent to the second engagement end;
• and
• a nut member which internally receives the first engagement end of the ferrule member, the second engagement end of the connector member, and the serrations of the ferrule member, the nut member comprising internal fastening means adapted to engage the external fastening means of the connector member, thereby bringing the first sealing surface into sealing engagement with the second sealing surface, the nut member further comprising axially extending cantilever members wherein at least one cantilever member comprises an inwardly protruding lock engagement member adapted to engage at least one of the circumferentially spaced serrations of the ferrule member when the first sealing surface is brought into sealing engagement with the second sealing surface.