HIGH PRESSURE SWITCH
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United States of America Patent
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Issued Date -
Mar 31, 2011
app pub date -
Sep 23, 2010
filing date -
Sep 23, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present inventor devised, among other things, an exemplary pressure switch that includes a low-pressure switch housing portion and a high-pressure fitting portion. The low-pressure switch housing, which is formed of plastic for example, includes an electrical switch that can be turned on or off by moving a first contact between a pair of stationary contacts. The high-pressure fitting portion, which is formed of metal for example, has first and second barbed or threaded connector ends, which respectively engage an opening in the switch housing and a fluid line of an external system. An axial bore extending through the high-pressure fitting contains a piston which extends into the switch housing and is fastened to the first contact of the electrical switch. In operation, the piston travels within the bore in response to positive or negative pressure, moving the first contact toward or away from the stationary contacts to open or close the switch.
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