Metering valves for pressurised dispensing containers
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United States of America Patent
Stats
-
Aug 1, 2000
Grant Date -
N/A
app pub date -
Jul 21, 1999
filing date -
Sep 3, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention relates to metering valves for pressurised dispensing containers. The present invention provides a metering valve for use with a pressurised dispensing container. The valve comprises a valve stem (1) co-axially slidable within a valve member (2) defining an annular metering chamber (13). Outer and inner annular seals (4, 5) are operative between the respective outer and inner ends of the valve member (2) and the valve stem (1) to seal the annular metering chamber (13) therebetween. Wherein the valve member (2) comprises a main component part (17) and a liner (16) lining at least a portion of an inner surface of the main component part (17). The liner (16) is made of a material selected from, a ceramic, a metal or a glass and the main component part (17) is made of another material.
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