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Class Information
Number: 367/152
Name: Communications, electrical: acoustic wave systems and devices > Signal transducers > Underwater type > With impedance matching means
Description: Subject matter having means to mechanically couple the transucer to the medium in which it is immersed in such a way as to permit the maximum amount of energy transfer at selected wave lengths beetween the transducer and the medium.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8689639 Ultrasonic transducer having a matching layer between a piezoelectric element and a coupling element Apr. 8, 2014
8616061 Ultrasonic sensor Dec. 31, 2013
8611189 Acoustic coupler using an independent water pillow with circulation for cooling a transducer Dec. 17, 2013
8472651 Ultrasonic transducer for parametric array Jun. 25, 2013
8413524 Acoustic matching member, ultrasonic transmitter/receiver, and ultrasonic flowmeter Apr. 9, 2013
8164982 Ultrasonic sensor with piezoelectric elements and acoustic matching members Apr. 24, 2012
8009518 Ultrasonic sensor with piezoelectric elements and vibration isolator Aug. 30, 2011
7657044 Ultrasonic transducer for parametric array Feb. 2, 2010
7239577 Apparatus and methods for multicomponent marine geophysical data gathering Jul. 3, 2007
7194390 Predictor of minimal noise figure for wideband amplifier Mar. 20, 2007
7149151 Ultrasound transducer for application in extreme climatic conditions Dec. 12, 2006
7113447 Laser pumped compact acoustic sensor system Sep. 26, 2006
7058555 Predictor for optimal selective power transfer Jun. 6, 2006
6954406 Acoustical source and transducer having, and method for, optimally matched acoustical impedance Oct. 11, 2005
6831876 Acoustic window Dec. 14, 2004
6788620 Acoustic matching member, ultrasound transducer, ultrasonic flowmeter and method for manufacturing the same Sep. 7, 2004
6776051 Ultrasonic transducer and ultrasonic flowmeter using same Aug. 17, 2004
6690620 Sonar transducer with tuning plate and tuning fluid Feb. 10, 2004
6622092 Predictor for optimal broadband impedance matching Sep. 16, 2003
6545947 Acoustic matching material, method of manufacture thereof, and ultrasonic transmitter using acoustic matching material Apr. 8, 2003
6487324 Stepped acoustic impedance-matching transformer for very narrow channel acoustic traveling wave lens waveguide Nov. 26, 2002
6418084 Ultrasonic probe and method of manufacturing the same Jul. 9, 2002
6400648 Ultrasonic waveguide Jun. 4, 2002
6320989 Stepped acoustic impedance-matching transformer for very narrow channel acoustic traveling wave lens waveguide Nov. 20, 2001
5761156 Piezoelectric ultrasonic transducer Jun. 2, 1998
5757726 Flextensional acoustic source for offshore seismic exploration May. 26, 1998
5706252 Wideband multifrequency acoustic transducer Jan. 6, 1998
5664456 Ultrasonic transducer Sep. 9, 1997
5658534 Sonochemical apparatus Aug. 19, 1997
5553035 Method of forming integral transducer and impedance matching layers Sep. 3, 1996
5452265 Active acoustic impedance modification arrangement for controlling sound interaction Sep. 19, 1995
5434827 Matching layer for front acoustic impedance matching of clinical ultrasonic tranducers Jul. 18, 1995
5418759 Ultrasound transducer arrangement having an acoustic matching layer May. 23, 1995
5392259 Micro-grooves for the design of wideband clinical ultrasonic transducers Feb. 21, 1995
5375099 Transducer with acoustic matching member and method of making the transducer Dec. 20, 1994
5371717 Microgrooves for apodization and focussing of wideband clinical ultrasonic transducers Dec. 6, 1994
5343443 Broadband acoustic transducer Aug. 30, 1994
H1290 Conformable acoustic coupler Feb. 1, 1994
5267221 Backing for acoustic transducer array Nov. 30, 1993
5212671 Ultrasonic probe having backing material layer of uneven thickness May. 18, 1993
5172344 Deep submergence transducer Dec. 15, 1992
5155708 Acoustic wave sensor and method of making same Oct. 13, 1992
5093810 Matching member Mar. 3, 1992
5065372 Sonar transducer with explosive shock protector Nov. 12, 1991
5050128 Ultrasonic probe having an ultrasonic propagation medium Sep. 17, 1991
5033032 Air-gap hydrophone Jul. 16, 1991
4982386 Underwater acoustic waveguide transducer for deep ocean depths Jan. 1, 1991
4972826 Shock wave generator for an extracorporeal lithotripsy apparatus Nov. 27, 1990
RE33435 Ultrasound level detector Nov. 13, 1990
4944335 Automatic control system for filling beverage containers Jul. 31, 1990

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