The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 2009
Filed:
Aug. 07, 2007
Hiroyuki Ohta, Tsuchiura, JP;
Hiromi Shimazu, Kashiwa, JP;
Yohei Tanno, Hitachinaka, JP;
Yoshihisa Kiyotoki, Hitachinaka, JP;
Kenji Onodera, Hitachi, JP;
Kenji Araki, Mito, JP;
Hiroyuki Ohta, Tsuchiura, JP;
Hiromi Shimazu, Kashiwa, JP;
Yohei Tanno, Hitachinaka, JP;
Yoshihisa Kiyotoki, Hitachinaka, JP;
Kenji Onodera, Hitachi, JP;
Kenji Araki, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
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.