Position sensor for well tools
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United States of America Patent
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Jun 12, 2012
Grant Date -
Mar 19, 2009
app pub date -
Sep 8, 2008
filing date -
Sep 19, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A position sensor for well tools. A position sensor includes an indicator portion including a carrier supporting a resistive element and at least one contact, and a support device for supporting the carrier. Another position sensor includes an indicator portion including a slider for displacing at least one contact relative to a resistive element, the slider being displaceable between first and second limits, and an end load mechanism including a biasing device which exerts a biasing force on the slider as the slider approaches at least the first limit. Another position sensor includes an indicator portion including a resistive element and at least one contact which contacts and displaces across the resistive element, a change in position of the contact relative to the resistive element being indicated by a resistance change as the contact displaces across the resistive element.
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