BEARING APPARATUS
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United States of America Patent
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Issued Date -
Dec 14, 2023
app pub date -
Sep 8, 2021
filing date -
Sep 15, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A bearing apparatus includes a housing where a main spindle is accommodated, a bearing including an inner ring and an outer ring, the bearing supporting the main spindle rotatably with respect to the housing, a retaining lid fitted to an inside surface of the housing while the retaining lid is in contact with an axial end surface of the housing and an axial end surface of the outer ring, and a communication module arranged in a region opposed to the retaining lid with the bearing being interposed, the communication module wirelessly communicating over electromagnetic waves. In a portion of the retaining lid in contact with the housing, a non-metallic layer composed of ceramic which is a non-metallic material is provided.
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