Measuring Sensor

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United States of America Patent

APP PUB NO 20070277621A1
SERIAL NO

11663907

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention relates to a measuring sensor with a deformation body (7) on which at least one strain gage (2) is applied. In that regard, the strain gage (2) is hermetically sealed against external environmental influences by at least one thin deep drawn metallic sheet metal part (4). This hermetic sealing sheet metal part (4) is preferably embodied bowl-shaped and consists of a high-strength hardenable corrosion-resistant spring steel of the maraging type with 7.8 weight % nickel, 13 weight % chromium, 1 weight % molybdenum, 0.2 weight % silicon, 0.3 weight % manganese, 0.25 weight % beryllium, 0.2 weight % titanium as well as the remainder iron, which surprisingly comprises only a small hysteresis and has at least equally good creep characteristics as the stainless martensitic spring steels of the deformation body (7). Due to the good weldability of the maraging sheet metal part (4) with the martensite deformation body (7), there arises a surprising utilization for the hermetic sealing of the sensitive strain gages (2), which cause neither a significant force shunt nor a worsening of the physical measuring characteristics.

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Patent Owner(s)

Patent OwnerAddress
HOTTINGER BALDWIN MESSTECHNIK GMBH64293 DARMSTADT

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Host, Ursula Weiterstadt, DE 2 6
Schlachter, Werner Rossdorf, DE 8 36

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