EP 1238388 A1 20020911 - 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
Application
Priority
- DE 0004455 W 20001214
- DE 19961095 A 19991217
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
IPC 8 full level
G10K 9/122 (2006.01)
CPC (source: EP US)
G10K 9/122 (2013.01 - EP US)
Citation (search report)
See references of WO 0145081A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 0145081 A1 20010621; DE 50009672 D1 20050407; EP 1238388 A1 20020911; EP 1238388 B1 20050302; US 2002180316 A1 20021205
DOCDB simple family (application)
DE 0004455 W 20001214; DE 50009672 T 20001214; EP 00991061 A 20001214; US 17405802 A 20020617