Fluid sealing joint with valve function has constriction between its head and body providing spring function about longitudinal rotational axis

摘要

Sealing joint (21) has constriction between its head (23) and body (24c) asymmetrical to transverse plane. Rotational axis (32), central longitudinal line of peripheral zone (Z2) which make contact with fixing means on edge when joint body pivots around its axis, and central longitudinal line of the contact zone (Z1) of joint tail (24a) create longitudinal buttress covering the opening. When a pressure threshold is reached the joint rotates around its axis (32) and the fluid can pass through the opening.