Swivelling coupling with external sealing element

A hydraulic coupling for providing a connection between a pair of hydraulic lines, comprising:

• a coupling adapter having a fluid channel therethrough and comprising:
• a housing defining an internal cavity having internal surfaces comprising at least one radial surface and at least one axial surface, the internal cavity having an open end;
• and
• an adapter port adapted to engage one of the pair of hydraulic lines and establish fluid communication between the one of the pair of hydraulic lines and the fluid channel;
• a male component having a fluid passage therethrough and comprising:
• a shank portion having a shank portion port adapted to engage the other one of the pair of hydraulic lines and establish fluid communication between the other one of the pair of hydraulic lines and the fluid passage;
• a flange portion extending radially outward from the shank portion, the male component being insertable within the internal cavity of the housing to enable the flange portion to cooperatively abut on the at least one radial surface, and to enable the fluid passage and the fluid channel to be in fluid communication;
• a nut securable within the internal cavity of the housing and surrounding the shank portion to radially restrain the shank portion within the internal cavity, the nut having a projection extending into the internal cavity for axially restraining the flange portion within the internal cavity, the nut further comprising an inner surface adapted to contact the shank portion and an outer end extending along the shank portion opposite the projection and outside the internal cavity, the outer end comprising an end surface extending transversely relative to the inner surface, the male component being adapted to rotate with respect to the housing and the nut about a longitudinal axis of the shank portion, thereby enabling the pair of hydraulic lines to be swivellably interconnected;
• and
• a sealing assembly comprising:
• an inner seal provided between the inner surface of the nut and the shank portion to substantially seal inner interstices therebetween;
• and
• an outer seal provided about the shank portion adapted to engage a junction between the end surface of the nut and the shank portion to substantially seal outer interstices therebetween, the outer seal being made of resilient material and adapted to at least partially block axial movement and radial movement of the male component relative to the housing.