Patent · US Expired

Acoustic wave sensor and method of making same

US5155708A · kind A · utility

14Cited by
9References
13Claims
0Family size

Inventors

Key dates

Filing dateFeb 26, 1991
Grant dateOct 13, 1992
Priority date—
Expiry dateFeb 26, 2011

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01H11/08
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A hydrophone for calibrating lithotripters includes a spot poled disc of piezoelectric material which is mounted on a brass cylinder backing. A coaxial cable is electrically connected to one surface of the disc through the brass backing and the opposing surface of the disc. A mixture of polymeric material and microballoons is provided to protect the interconnection of the center conductor and the opposing surface of the disc and prevent damage due to the incident ultrasonic shock waves. The brass backing is placed in a suitable housing of phenolic material. A process in fabricating the piezoelectric disc and assembling the hydrophone is disclosed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.