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:
Apr. 01, 2003
Filed:
Jun. 09, 2000
Hitoshi Iwata, Aichi, JP;
Abstract
A two-axis yaw rate sensor ( ) includes a vibration ring ( ) and a ring support plate for supporting the vibration ring ( ). The vibration ring ( ) includes first to fourth vibrating drive surfaces ( ) arranged in turn in a circumferential direction and narrow portions ( ) located between the adjacent drive surfaces ( ). The first and the third drive surfaces ( ) are opposed to one another on the axis Y passing through the center of the vibration ring ( ). The second and the fourth drive surfaces ( ) are opposed to one another on the axis X passing through the center of the vibration ring ( ). The axis Y is substantially perpendicular to the axis X. A PZT film ( ) is formed on the drive surfaces ( ) and vibrates the drive surfaces ( ) in a radial direction of the vibrating ring ( ). A weight ( ) is coupled to a coupling portion ( ) of each drive surface ( ) and vibrates in a direction substantially perpendicular to the vibrating direction of the vibrating surfaces ( ). Detection electrode films ( ) are formed on the coupling portions ( ) and detect the deformation of the corresponding coupling portions ( ).