Ultrasonic probe for use in ultrasonic endoscope
US4974590A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 1989 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | May 11, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/002
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ultrasonic probe for use in the ultrasonic endoscope including a damping layer arranged on a rear surface of an ultrasonic vibrating element for absorbing an undesired ultrasonic wave emitted from the rear surface of the vibrating element, an insulating layer and a conductive housing. A matching coil for improving the efficiency of the vibration of the ultrasonic vibrating element is formed as an air-core type and is embedded within the damping layer or the insulating layer such that the undesired ultrasonic wave is passed through a hollow central space of the air-core type matching coil and is effectively absorbed by the damping layer, so that the damping function of the damping layer is not affected by the matching coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.