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:
May. 21, 2002
Filed:
Feb. 15, 2000
Makoto Tani, Inazawa, JP;
Takayuki Kikuchi, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
The invention reduces the noise from a vibrating gyroscope used for detecting a turning angular rate, when the vibrator is subjected to external vibration. The vibrator is made out of a piezoelectric material. The vibrator vibrates in a driving vibration mode electrically excited in the vibrator and in a detection vibration mode occurring in the vibrator due to Coriolis force when the vibrator is turned. The surface of the vibrator includes a region where the stress induced in the vibrator due to the detection vibration mode is in a range of a local maximum. The gyroscope further has a damper, for reducing vibration sensitivity to external vibrations applied externally on the vibrator. The damper is made of a polymer and is provided on at least the region where the stress induced in the vibrator due to the detection vibration mode is in a range of a local maximum.