Indicating apparatus for indicating a vacuum

G - Physics – 01 – L

Patent

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Details

G01L 21/00 (2006.01) B01D 46/44 (2006.01) F02M 35/09 (2006.01)

Patent

CA 2169982

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 ambient-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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