| 摘要 |
PCT No. PCT/FI90/00274 Sec. 371 Date Jul. 17, 1992 Sec. 102(e) Date Jul. 17, 1992 PCT Filed Nov. 15, 1990 PCT Pub. No. WO91/10598 PCT Pub. Date Jul. 25, 1991.A valve structure for an air sack comprising an essentially cylindrical tubular part extending hermetically from the inside to the outside of the sack and having external threads on the portion outside the sack, a plug with internal threads to be screwed on the external threads of the tubular part to close the end of the tubular part hermetically, and a filling valve in the middle of the plug. To facilitate and accelerate the discharge of air from the sack, the plug is provided with several air exhaust holes within the area surrounding the filling valve. At the end of the tubular part facing the plug there is an inner, preferably annular flange part, the upper surface of which is pressed hermetically against the lower surface of the plug closing the passage of air from the sack when the plug is entirely screwed in its place.
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