Global Patent Index - EP 1080345 A2

EP 1080345 A2 2001-03-07 - ULTRASONIC TRANSDUCER

Title (en)

ULTRASONIC TRANSDUCER

Title (de)

ULTRASCHALLWANDLER

Title (fr)

TRANSDUCTEUR ULTRASONORE

Publication

EP 1080345 A2 (DE)

Application

EP 99932668 A

Priority

  • DE 9901402 W
  • DE 19820419 A

Abstract (en)

[origin: DE19820419A1] The invention relates to an ultrasonic transducer which can, for example, be used in level measuring devices for measuring the level of a liquid in open or closed receptacles. The inventive ultrasonic transducer comprises a piezoelectric wafer (2) which is situated in a retaining device (3). A coupling layer (1) for ultrasound is applied, e.g. cast, in a fixed manner to the fore-side (radiating ) surface of the piezoelectric wafer (2). This coupling layer (1) is comprised of an elastic material whose elasticity enables the coupling layer to adapt to a surface of an object to be measured when the ultrasonic transducer is pressed against the surface of said object to be measured. In an advantageous manner, the inventive ultrasonic transducer permits an acoustic coupling to objects to be measured which does not require the use of auxiliary materials and which can be changed in any manner.

IPC 1-7 (main, further and additional classification)

G01F 23/296

IPC 8 full level (invention and additional information)

G01F 23/296 (2006.01); G10K 11/02 (2006.01)

CPC (invention and additional information)

G01F 23/2968 (2013.01); G10K 11/02 (2013.01)

Citation (search report)

See references of WO 9957526A3

Designated contracting state (EPC)

AT CH DE FR GB LI NL

EPO simple patent family

DE 19820419 A1 19991118; EP 1080345 A2 20010307; WO 9957526 A2 19991111; WO 9957526 A3 20000316

INPADOC legal status


2002-07-17 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020108

2001-08-22 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010712

2001-03-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000922

2001-03-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT CH DE FR GB LI NL