EP 0678853 A3 19970521 - Ultrasonic transducer with asymmetric radiation characteristic.
Title (en)
Ultrasonic transducer with asymmetric radiation characteristic.
Title (de)
Ultraschallwandler mit asymmetrischer Strahlungscharakteristik.
Title (fr)
Transducteur à ultrason ayant une charactéristique de radiation asymmétrique.
Publication
Application
Priority
DE 4413894 A 19940421
Abstract (en)
[origin: EP0678853A2] The transducer is used as an electroacoustic flexure transducer, with a membrane of a piezoelectrically inactive material, coupled to a piezoelectric plate, arranged centrally on the inside face of the membrane. The opposing radiating surface of the membrane has at least one circular segment recess (7, 8) as its peripheral edge. Pref the membrane is cap shaped with a cylindrical sidewall incorporating a peripheral groove (2) and a radiating front face with a pair of circular segment recesses at diametrically opposite points, with a depth which is sufficient to reach the level of the peripheral groove. <IMAGE>
IPC 1-7
IPC 8 full level
G10K 9/12 (2006.01); G10K 9/122 (2006.01); G10K 13/00 (2006.01)
CPC (source: EP)
G10K 9/122 (2013.01)
Citation (search report)
- [XDY] EP 0308899 A2 19890329 - SIEMENS AG [DE]
- [YD] US 4437032 A 19840313 - GELHARD EGON [DE]
- [Y] DE 3441684 A1 19860515 - SWF AUTO ELECTRIC GMBH [DE]
- [A] DE 3941634 A1 19910620 - SIEMENS AG [DE]
- [DA] DE 3939387 A1 19910606 - SWF AUTO ELECTRIC GMBH [DE]
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0678853 A2 19951025; EP 0678853 A3 19970521; EP 0678853 B1 20010718; DE 4413894 A1 19951026; DE 4413894 C2 20021212; DE 59509415 D1 20010823; ES 2158008 T3 20010901
DOCDB simple family (application)
EP 95105504 A 19950412; DE 4413894 A 19940421; DE 59509415 T 19950412; ES 95105504 T 19950412