EP 0655156 B1 19960619 - ULTRASONIC TRANSDUCER
Title (en)
ULTRASONIC TRANSDUCER
Title (de)
ULTRASCHALLWANDLER
Title (fr)
TRANSDUCTEUR ULTRASONORE
Publication
Application
Priority
- EP 93917707 A 19930729
- EP 9302039 W 19930729
- EP 92113833 A 19920813
Abstract (en)
[origin: US5659220A] PCT No. PCT/EP93/02039 Sec. 371 Date Feb. 13, 1995 Sec. 102(e) Date Feb. 13, 1995 PCT Filed Jul. 29, 1993 PCT Pub. No. WO94/05004 PCT Pub. Date Mar. 3, 1994For industrial applications, there is a need for compact ultrasonic transducers which at the same time have a radiation characteristic with small side lobes. This requirement is met by an ultrasonic transducer of conventional design and having a piezoelectric transducer element (1) which is bonded over its main surface (7) to a disk-shaped lambda /4 matching element (2), it being the case according to the invention that the circumferential surface (3) of the lambda /4 matching element is profiled with a notch (4) of suitable depth (5).
IPC 1-7
IPC 8 full level
G10K 11/02 (2006.01); H04R 17/00 (2006.01)
CPC (source: EP US)
G10K 11/02 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
US 5659220 A 19970819; DE 59303034 D1 19960725; EP 0655156 A1 19950531; EP 0655156 B1 19960619; JP 3148242 B2 20010319; JP H08500224 A 19960109; WO 9405004 A1 19940303
DOCDB simple family (application)
US 38198295 A 19950213; DE 59303034 T 19930729; EP 9302039 W 19930729; EP 93917707 A 19930729; JP 50582994 A 19930729