Global Patent Index - EP 1238388 A1

EP 1238388 A1 2002-09-11 - PIEZOELECTRIC ULTRASONIC TRANSFORMER COMPRISING A HOUSING AND AN INSULATING LAYER

Title (en)

PIEZOELECTRIC ULTRASONIC TRANSFORMER COMPRISING A HOUSING AND AN INSULATING LAYER

Title (de)

PIEZOELEKTRISCHER ULTRASCHALLWANDLER, DER EIN GEHÄUSE UND EINE ISOLIERSCHICHT UMFASST

Title (fr)

TRANSDUCTEUR A ULTRASONS PIEZOELECTRIQUE COMPORTANT UN BOITIER ET UNE COUCHE ISOLANTE

Publication

EP 1238388 A1 (DE)

Application

EP 00991061 A

Priority

  • DE 0004455 W
  • DE 19961095 A

Abstract (en)

[origin: WO0145081A1] The invention relates to a piezoelectric ultrasonic transformer (1), comprising a housing (2) and a piezoelectrically active layer (4) which is connected to the housing (2) via an insulating layer (5). According to the invention, an adaptive layer (6) is also located between the insulation layer (5) and the housing (2), the thermal expansion coefficient of said adaptive layer having a value between the values of the thermal expansion coefficient of the housing (2) and the insulating layer (5). An ultrasonic transformer (1) of this type has a long service life even when used in an environment of frequent temperature fluctuations.

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

G10K 9/122

IPC 8 full level (invention and additional information)

G10K 9/122 (2006.01)

CPC (invention and additional information)

G10K 9/122 (2013.01)

Citation (search report)

See references of WO 0145081A1

Designated contracting state (EPC)

DE FR GB

DOCDB simple family

WO 0145081 A1 20010621; EP 1238388 A1 20020911; EP 1238388 B1 20050302; US 2002180316 A1 20021205