THREADED CONNECTION WITH SELF SEALING Russian patent published in 2012 - IPC F16L15/04 

FIELD: machine building.

SUBSTANCE: threaded connection includes sealing ring located between nipple and coupling and placed in the surface section of nipple after nipple threaded part ends. Sealing ring includes two projecting annular projections located at an acute angle to longitudinal axis, at least two annular projections on outer cylindrical surface of sealing ring, reinforcing ring partially built in sealing ring and being in tight contact with inner surface of annular groove of coupling owing to annular projections. Inner surface of sealing ring can be made without considerable deviations from regular shape and has constant diameter or annular projections.

EFFECT: invention improves the connection reliability.

16 cl, 8 dwg