| 摘要 |
<p>Device for inflating balloons, particularly balloons supported by tubular shafts, comprising a one-way valve mounted along or at one end of said shaft and inserted into the neck of the balloon.</p><p>Said valve is provided externally with a projection and rings to deform the neck of the balloon elastically, and ensure the retention of the inflation pressure of the balloon. Such sealing may be improved by a tapered sleeve. The valve is made by two parts joined together and forming a cylindrical cavity enclosed by two bases, of which one is smooth surfaced with a central axial hole and the other one is provided with radial ribs and a central axial hole opening into the balloon. A sealing element which can be a thin sheet, a sphere or a hollow piston with tapered element, slides freely in said cylindrical cavity.</p><p>The valve can also be of a kind manually inserted and placed at one end of the supporting shaft.</p> |
