RUBBER-CORD MEMBER Russian patent published in 2008 - IPC F16L11/08 

FIELD: valving systems.

SUBSTANCE: rubber-cord member comprises inner sealing layer, load-bearing frame secured to the board rings, outer rubber layer, inner flange, intermediate ring, and outer flange. One of the board rings is an auxiliary one and is made of a flexible material and mounted in the hollow of the rigid shaped base of the board ring. The main board ring bears on the inner flange, and the edge of the sealing layer has a thickening made of a collar and projects out of the board.

EFFECT: enhanced reliability.

1 dwg