Abstract: A fluid coupling system is provided including a fluid coupling having a cooperative key coding system and latching mechanism, a valve biasing mechanism with corrosion resistance, and other advantageous features. The key coding system permits interconnection of only matched coupling members while preventing the inadvertent interconnection of mismatched coupling members notwithstanding the presence of many coupling, both matched and mismatched. The coupling includes first and second coupling members that are releasably slideably, axially interfitted with their passageways in fluid communication. The key coding system includes key coding elements on the coupling members that are axially movable into matched interengagement when the coupling members are matched but are precluded from moving into matched interengagement when they are mismatched, all without rotation of the couplings or the key coding elements irrespective of the relative rotational positions of the couplings members or coding elements.

Abstract: A fluid coupling system is provided including a fluid coupling having a cooperative key coding system and latching mechanism, a valve biasing mechanism with corrosion resistance, and other advantageous features. The key coding system permits interconnection of only matched coupling members while preventing the inadvertent interconnection of mismatched coupling members notwithstanding the presence of many coupling, both matched and mismatched. The coupling includes first and second coupling members that are releasably slideably, axially interfitted with their passageways in fluid communication. The key coding system includes key coding elements on the coupling members that are axially movable into matched interengagement when the coupling members are matched but are precluded from moving into matched interengagement when they are mismatched, all without rotation of the couplings or the key coding elements irrespective of the relative rotational positions of the couplings members or coding elements.

Abstract: A quick-connect coupling for interconnecting only matching fluid delivery and supply lines while preventing the inadvertent connection of mismatched lines where there are matched and mismatched delivery and supply lines. The coupling includes first and second coupling members that are releasably slidably, axially interfitted with their passageways in fluid communication. In the disclosed embodiment of a coupling for use in a chemical extraction system, one coupling member is a male member connected to the supply lines in the typical fifty gallon drum and the other coupling member is a female coupling member connected to the delivery lines. Key coding elements on the coupling members are movable into matched interengagement when the supply and delivery lines are matched but are precluded from moving into matched interengagement when the lines are mismatched.

Abstract: A quick-connect coupling for interconnecting only matching fluid delivery and supply lines while preventing the inadvertent connection of mismatched lines where there are matched and mismatched delivery and supply lines. The coupling includes first and second coupling members that are releasably slidably, axially interfitted with their passageways in fluid communication. In the disclosed embodiment of a coupling for use in a chemical extraction system, one coupling member is a male member connected to the supply lines in the typical fifty gallon drum and the other coupling member is a female coupling member connected to the delivery lines. Key coding elements on the coupling members are movable into matched interengagement when the supply and delivery lines are matched but are precluded from moving into matched interengagement when the lines are mismatched.