| 摘要 |
An inflation valve includes a valve body formed of a suitable rigid material and having a longitudinal passage therethrough. Internally the valve body includes an inwardly extending annular member for supporting the valve element and providing a valve seat. This annular member has a predetermined longitudinal dimension between a transverse wall at one end and the base of the valve seat at the other end. The valve includes a valve element made of such size as to move freely within the aforementioned longitudinal passage. It includes a nose portion for engaging the valve seat at one side of the aforementioned annular member on the valve body and an enlarged portion for engaging the transverse wall. The valve element is dimensioned so that the distance between the nose portion of the valve element and the enlarged portion thereof is slightly less than the aforementioned longitudinal dimension of the valve body between the transverse wall and the base of the valve seat. The valve element is made of a flexible elastic material so that it may be compressed upon assembly. During assembly, the nose portion of the valve is forced through the passage of the annular member until this nose portion passes just beyond the valve seat; during this time the enlarged portion is compressed against the transverse wall because of the slightly lesser dimension of the valve element. Upon release of the assembly pressure, the resilience of the flexible valve element causes the nose portion thereof to be urged firmly against the valve seat in reliable sealing engagement.
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