US Patent 7584668 Monitoring system for valve device

Patent 7584668 was granted and assigned to Hitachi on September, 2009 by the United States Patent and Trademark Office.

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Patent Citations Received

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US Patent 12018772 Valve with load cell

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Patent Inventor Names

Hiromi Shimazu0

Hiroyuki Ohta0

Kenji Araki0

Kenji Onodera0

Yohei Tanno0

Yoshihisa Kiyotoki0

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Patent abstract

A monitoring system for valve device according to the present invention comprises a semiconductor single crystalline substrate including a bridged circuit and the bridged circuit comprising impurity-diffused resistors. The semiconductor single crystalline substrate is mounted to any of a valve device's valve stem, valve yoke, drive shaft, or elastic body disposed at the end of the drive shaft. Thrust and torque of the valve device are measured by the semiconductor single crystalline substrate and then the measured values are used for monitoring the valve device.

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