Device for sensing gap variation
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United States of America Patent
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May 28, 2013
Grant Date -
Dec 8, 2011
app pub date -
Jun 2, 2010
filing date -
Jun 2, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A sensing device includes a cover having a window; a seat comprising a bottom first opening, a peripheral wall, a recess on the wall, and a bottom channel; a spring biased sliding unit comprising a bottom projection fitted in the first opening, a probe extending from the projection, a hollow cylinder, and two opposite cavities on a periphery; a cylindrical rotational unit comprising a rim extending inward from an inner surface, a second opening on the rim, a display plate on the rim, and two opposite guide protrusions on an inner surface opposing the display plate wherein indications are printed on the display plate, and the rotational unit is rotatably put on the sliding unit with the cylinder passing through the rim, the display plate being rested on the recess, and the guide protrusions being engaged with the cavities; and a biasing member retained on the cylinder.
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