Valve construction and method of making the same

摘要

A valve construction having a first housing provided with an internal chamber and an inwardly directed shoulder projecting into the chamber at one end thereof and defining a valve seat on one side thereof. A second housing is secured to the first housing and has a chamber aligned with the chamber of the first housing, the second housing having an inwardly directed shoulder projecting into its chamber at one end thereof. A resilient annular member is disposed against one side of the shoulder of the first housing and against an adjacent side of the shoulder of the second housing while projecting inwardly beyond the shoulders to define the valve seat. One of the housings has an annular groove in the shoulder thereof inboard of the inner and outer peripheries thereof and receives an annular tongue projecting from the shoulder of the other housing, the tongue having an inner side thereof engaging the outer periphery of the resilient annular member and being ultrasonically welded substantially only on the outer side thereof to the housing that has the groove whereby the resulting weld area is isolated from the resilient annular member.