Indicating apparatus for indicating a vacuum

Details Indicating apparatus for indicating a vacuum Indicating apparatus for indicating a vacuum

1996-02-07

1998-04-28

Nguyen, Matthew

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83P, H01H 3540

Patent

active

057447705

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.

REFERENCES:
patent: 4369728 (1983-01-01), Nelson
patent: 4445456 (1984-05-01), Nelson
patent: 4532389 (1985-07-01), Woods
patent: 4616114 (1986-10-01), Strasser
patent: 4688511 (1987-08-01), Gerlach et al.
patent: 4694127 (1987-09-01), Amuda
patent: 4843948 (1989-07-01), Sugiura
patent: 5132500 (1992-07-01), Clew

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