Indicating apparatus for indicating a vacuum
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United States of America Patent
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Apr 28, 1998
Grant Date -
N/A
app pub date -
Feb 7, 1996
filing date -
Feb 24, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An indicating apparatus for indicating a vacuum, particularly for indicating the vacuum on the filtered-air side of an air filter for an internal-combustion engine, including a housing and a piston which is movably disposed in the housing and which separates a vacuum area from an anbient-pressure area. A snap element is provided which is activated by the piston and, at a predetermined vacuum, triggers an electric contact.
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