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Class Information
Number: 310/325
Name: Electrical generator or motor structure > Non-dynamoelectric > Piezoelectric elements and devices > Combined with resonant structure > Sandwich or langevin type
Description: Subject matter in which the piezoelectric element or elements are coupled to a front and/or rear mass, which combined structure is disclosed as being resonant at the operating wavelength.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8559660 Electrostatic electroacoustic transducers Oct. 15, 2013
8531083 Devices having a tunable acoustic path length and methods for making same Sep. 10, 2013
8450907 Sound generator for use in parametric array May. 28, 2013
8415860 Spring disc energy harvester apparatus and method Apr. 9, 2013
8334636 Vibration coupling unit Dec. 18, 2012
8334635 Transducer arrangements for ultrasonic surgical instruments Dec. 18, 2012
8303613 Ultrasonic instrument using langevin type transducers to create transverse motion Nov. 6, 2012
8128646 Ultrasonic vibration apparatus Mar. 6, 2012
8004158 Method and device for cooling ultrasonic transducers Aug. 23, 2011
7977852 Method and apparatus for harvesting energy from mechanical vibrations Jul. 12, 2011
7888845 Device for coupling low-frequency high-power ultrasound resonators by a tolerance-compensating force-transmitting connection Feb. 15, 2011
7876030 Ultrasonic transducer which is either crimped or welded during assembly Jan. 25, 2011
7872400 Ultrasonic device with a disk-shaped resonator Jan. 18, 2011
7737607 Actuator having first and second electrodes and deformable joining member and method for mounting actuator Jun. 15, 2010
7728489 Piezoelectric actuator with a sheath, for disposition in a piezoelectric injector Jun. 1, 2010
7714481 Ultrasonic treatment apparatus May. 11, 2010
7495371 Cleaning tank with sleeved ultrasonic transducer Feb. 24, 2009
7495370 Hybrid transducer Feb. 24, 2009
7489066 Biometric sensing device with isolated piezo ceramic elements Feb. 10, 2009
7474036 High-capacity ultrasonic composite oscillating device Jan. 6, 2009
7425791 Acoustic driver assembly with recessed head mass contact surface Sep. 16, 2008
7425792 Acoustic driver assembly with restricted contact area Sep. 16, 2008
7418102 Broad-band echo sounder Aug. 26, 2008
7285895 Ultrasonic medical device and method Oct. 23, 2007
7276824 Oscillating system and tool for ultrasonic impact treatment Oct. 2, 2007
7256531 Driving apparatus Aug. 14, 2007
7250706 Echo sounder transducer Jul. 31, 2007
7224099 Molded piezoelectric apparatus May. 29, 2007
7224103 Acoustic driver assembly with recessed head mass contact surface May. 29, 2007
7218034 Acoustic driver assembly with restricted contact area May. 15, 2007
7218033 Acoustic driver assembly with restricted contact area May. 15, 2007
7187105 Transducer with coupled vibrators Mar. 6, 2007
7148606 Acoustic driver assembly for a spherical cavitation chamber Dec. 12, 2006
7126256 Acoustic driver assembly with recessed head mass contact surface Oct. 24, 2006
7126258 Acoustic driver assembly with recessed head mass contact surface Oct. 24, 2006
7124870 Power transmitting mechanism and power transmitting method Oct. 24, 2006
7125468 Method of making ultrasound transducer or actuator Oct. 24, 2006
7122943 Acoustic driver assembly with restricted contact area Oct. 17, 2006
7122941 Acoustic driver assembly with recessed head mass contact surface Oct. 17, 2006
7019439 High power ultrasonic transducer with broadband frequency characteristics at all overtones and harmonics Mar. 28, 2006
7002283 Ultrasonic transducer assembly Feb. 21, 2006
6987347 Piezoelectric resonator component Jan. 17, 2006
6964327 Ultrasonic clutch Nov. 15, 2005
6960869 Acoustic driver assembly for a spherical cavitation chamber Nov. 1, 2005
6958569 Acoustic driver assembly for a spherical cavitation chamber Oct. 25, 2005
6953122 Smart screening machine Oct. 11, 2005
6938778 Smart screening machine Sep. 6, 2005
6933656 Ultrasonic motor having integrated electrodes and manufacturing method of the same Aug. 23, 2005
6927528 Piezoactive actuator with dampened amplified movement Aug. 9, 2005
6924585 Sleeved ultrasonic transducer Aug. 2, 2005

1 2 3 4










 
 
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