| 摘要 |
<p>A non-refillable valve for a pressurized container which includes a unidirectional stepped valve housing within which a freestanding blocking element is housed. The blocking element is preferably a reversible, symmetrical check that integrally includes stop means for preventing the return of said blocking element to an initial location after it has been moved to a final location that activates the one way characteristic feature of a non-refillable valve (where activation is designed to take place after initially charging of the container). Further aspects of the invention relate to blocking elements (checks) per se which are suitable for use in non-refillable valves. In particular, blocking elements that are easy to manufacture and install, blocking elements that possess a degree of rigidity which enhances the check's ability to function as a freestanding element once inserted into a valve housing, and blocking elements which inherently reduce the risk of false check engagement during the valve assembly process, are all contemplated by the present invention. Other aspects of the invention relate to dual purpose manufacturing processes that use a single basic valve design to enable both refillable and non-refillable valves to be manufactured; and relate to products of the aforementioned processes.</p> |
