Quick disconnect liquid line coupling with volumertric expansion couping element

A quick disconnect coupling for a fluid line, said quick disconnect coupling comprising:

• a first coupling element, said first coupling element comprising;
• an annular member having opposed ends, a first portion of said annular member extending from one of the opposed ends being adapted to being connected to a section of a fluid conduit, said annular member having an internal radially extending shoulder between its opposed ends,
• an annular body having at least a first portion positioned within said annular member and a second portion, said second portion having a restricted outlet, said annular body being movable within and with respect to said annular member between a first position, wherein an end of said first portion of said annular body is positioned adjacent to said radially extending shoulder of said annular member, and a second position, wherein said end of the annular body is positioned further away from said radially extending shoulder of said annular body,
• first biasing means resiliently biasing said annular body toward said first position of said annular body,
• a valve member having an imperforate end portion, said valve member being positioned within said second portion of said annular body and being adapted to be movable within and with respect to said annular body between a first position, wherein said end portion of said valve member is within said restricted outlet of said annular body and will substantially block fluid flow through said annular body, and a second position, wherein said end portion of said valve member is away from said restricted outlet of said annular body and fluid is free to flow through said annular body, and
• second biasing means resiliently biasing said valve member toward said first position of said valve member;
• and
• a second coupling element releasably engaging said first coupling element at a first end of said second coupling element, said second coupling element having an opposed end which is adapted to being connected to another section of a fluid conduit and comprising,
• valve means carried by said second coupling element, said valve means engaging said valve member of said first coupling element and maintaining said valve member in said second position of said valve member.