Gas purifier having pressure responsive switch as end of life detector
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United States of America Patent
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Mar 15, 1994
Grant Date -
N/A
app pub date -
Oct 3, 1991
filing date -
Nov 23, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A gas purifier for impure gas having an end of life detector. The purifier has: A. a housing; and B. an impurity-sorbing material packed within the housing. The impurity-sorbing material has the property of reacting with impurities in the impure gas. This reacting causes expansion of the impurity-sorbing material; and C. an impure gas inlet; and D. a pure gas outlet; and E. a pressure responsive electrical switch within the housing. The position of the switch is responsive to expansion of the impurity-sorbing material; and F. An indicator outside the housing to indicate the position of the switch.
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