US4836023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrational angular rate sensor
Assignee: Yazaki Corp
•
Filing: 1988-03-09
•
Granted: 1989-06-06
•
Expires: 2008-03-09
Abstract
Abstract To increase the quality factor Q of the vibrational angular rate sensor and therefore the sensitivity of the sensor, stabilize the sensor performance, facilitate wiring work, and minimize the sensor, a square pillar shaped vibrator, four vibrator node support pins and an external vibrator support base are all formed integral with each other from a single constant elasticity material block. Further, at least three and preferably four piezoelectric elements are connected to an external circuit via at least three and preferably four separate thin film conductive layers each extending from each piezoelectric element, on and along each vibrator node support pin, to an external vibrator support base.
Inventors
- 👤 Takahiro Oikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:35
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/56; G01C19/5642
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
A vibrational angular rate sensor, comprising: (a) a vibrator of square pillar shape; (b) means for node-supporting said vibrator at two vibration nodes of said vibrator; (c) means for external support of said vibrator via said vibrator node-supporting means; (d) said vibrator, said vibrator mode-supporting means, and said vibrator external support means all being formed integral with each other from a single material block; (e) at least three piezoelectric elements attached to at least three side surfaces of said square pillar shaped vibrator; and (f) at least three thin film conductive layers each extending along one of said vibrator node-supporting means from one of said at least three piezoelectric elements to said external vibrator supporting means so as to be connectable to an external fine conductive wire.
Claim 2
Dependent Claim
127 words
A vibrational angular rate sensor, comprising: (a) a vibrator of square pillar shape; (b) means for node-supporting said vibrator at two vibration nodes of said vibrator; (c) means for external support of said vibrator via said vibrator node-supporting means; (d) said vibrator, said vibrator mode-supporting means, and said vibrator external support means all being formed integral with each other from a single material block; (e) at least three piezoelectric elements attached to at least three side surfaces of said square pillar shaped vibrator; and (f) at least three thin film conductive layers each extending along one of said vibrator node-supporting means from one of said at least three piezoelectric elements to said external vibrator supporting means so as to be connectable to an external fine conductive wire.
Claim 3
Dependent Claim
25 words
The vibrational angular rate sensor as set forth in claim 1, wherein said external vibrator supporting means is formed into two separate square U shapes.
Claim 4
Dependent Claim
25 words
The vibrational angular rate sensor at set forth in claim 1, wherein said external vibrator supporting means is formed into a single Square O shape.
Claim 5
Dependent Claim
25 words
The vibrational angular rate sensor as set forth in claim 1, wherein said external vibrator supporting means is formed into a single square C shape.
References Cited (Backward Citations)
US4511821A
Cited
JPS61114123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |