Apparatus for counting cycles of fluid flow
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United States of America Patent
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-
May 30, 1995
Issued Date -
N/A
app pub date -
Mar 29, 1993
filing date -
Aug 17, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A counting apparatus which is designed to be placed in parallel to a fluid flow line has a differential pressure switch which is placed across an orifice positioned within the fluid flow line. A counting mechanism is associated with the differential pressure switch to register a count when signaled by the differential pressure switch. The differential pressure switch is operable to react to the difference in pressure across the orifice to signal the counter to register a count. The orifice can be a fixed or a variable orifice. In another embodiment of the invention, a fixed or variable orifice is placed within the diaphragm of a diaphragm type differential pressure switch to adapt the differential pressure switch to be placed in series with the fluid flow line rather than in parallel to it.
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