Device indicating a state due to the pressure modification
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United States of America Patent
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Nov 11, 1980
Grant Date -
N/A
app pub date -
Mar 20, 1978
filing date -
Mar 19, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns a device indicating a state due to the pressure modification, in particular an overpressure or a vacuum pressure switch for the indication of the fullness of the dust bags in household or industrial vacuum cleaners with a diaphragm exposed on one side to the variable pressure and with a contacting action between two contact elements as caused by the diaphragm's movement.
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