Vibration detecting device
US4978883A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Sep 22, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H11/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vibration detecting device which comprises a bush of metal having a cylindrical portion at its center; a casing of a resinous material which is formed by insertion-molding along with the bush so as to form a receiving portion at the outer side of the cylindrical portion; a piezoelectric element, a terminal and a weight placed along the outer periphery of the cylindrical portion of the bush in the receiving portion; a nut fastened to the cylindrical portion to secure the piezoelectric element, the terminal and the weight, and a filler for sealing the nut and the other elements received in the receiving portion, wherein one side of the receiving portion with respect to the vibration detecting direction is open.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.