PURPOSE: To balance pressure and prevent a leak under high pressure by positioning a longitudinal axis and the first rotation of the elastic continuous traverse plane away off the second rotation.
CONSTITUTION: An air-tight ring 10 which seals between the interior tube 14 and the exterior tube 16 has in the elastic traverse plane the first and the second rotations 20, 22 and the first and second sealing lines 30, 40 which are away from each other, respectively. When high pressure from the high pressure area 50 actuates a leg 26 and the rotation 20 to turn to the left, free distant rim 36 comes in touch with the inner plane 42 of the exterior tube 16 to prevent. Accordingly, the right turning rotational force is generated, legs 24, 26 are spaced, and the sealing line 34 is closely engaged with the ring plane 48 of the interior tube 14 and so the sealing line 40 with the ring plane 44 of the exterior tube 16, respectively. Thus, it is possible to maintain a balanced pressure and prevent a leak under high pressure.
ROBAATO EI BAARETSUTO
MAAKU II UUZURII
