Patent ID: 8287006

Claim:
A tube coupling system ( 1 ) for a pressurised fluid system having a tube ( 5 ) defining an outer surface with a fluid flowing through the tube ( 5 ), said tube coupling system comprising: a coupling body ( 3 ) for receiving the tube ( 5 ), a leakage seal ( 7 ) disposed within said body ( 3 ) for preventing the fluid supplied from the tube ( 5 ) from entering said coupling body ( 3 ), a gripping member ( 9 ) disposed within said body ( 3 ) for gripping the outer surface of the tube ( 5 ) received in said coupling body ( 3 ), a protrusion ( 24 ) coupled to said body ( 3 ) and defining at least a portion of a sealing seat, and an environment seal disposed within said body ( 3 ) and ( 11 ) having a first position engaging said sealing seat for sealing said coupling body ( 3 ), and a second position at least partially displaceable and arranged to be pressed at least partially off said sealing seat when there is internal fluid pressure in said coupling body ( 3 ) for allowing the fluid to flow out of said coupling body ( 3 ) to indicate a leakage; wherein at least one part of said environmental seal ( 11 ) is arranged to remain in contact with said sealing seat when there is internal fluid pressure in said coupling body ( 3 ).