Piezoelectric coaxial cable
US4629925A · kind A · utility
21Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Nov 20, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/42
Abstract
A piezoelectric coaxial cable comprises a central stretchable electrical conductor (1), preferably formed from a low melting point metal alloy, a piezoelectric intermediate layer (2), preferably formed from a vinylidene fluoride polymer which has been stretched and radially polarized to render it piezoelectric, and an outer electrical conductor (3). The intermediate layer has a ratio R of its internal radius to its external radius which is preferably not more than 0.5 and especially not more than 0.4. This construction enables coaxial cables to be formed without voiding or breaking of the internal conductor during stretching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.