Patents
Patents for H02N 2 - Electric machines in general using piezo-electric effect, electrostriction or magnetostriction (14,251)
02/1990
02/20/1990US4903166 Electrostrictive actuators
01/1990
01/31/1990EP0352858A2 Piezo-electric linear motor
01/17/1990EP0350484A1 Method and device in magnetostrictive motion systems.
01/16/1990US4894579 Apparatus for effecting fine movement by impact force produced by piezoelectric or electrostrictive element
01/16/1990US4894578 Ultrasonic driving device
01/09/1990US4893047 Ultrasonic driving device
01/09/1990US4893046 Ultrasonic driving device
01/09/1990US4893045 Ultrasonic driving device
01/04/1990DE3920726A1 Ultrasonic oscillator
12/1989
12/27/1989CN1038382A Harmonic electric machine using piezo-electric effect
12/26/1989US4890027 Dynamic motor controller
12/19/1989US4888515 Rotary power unit
12/19/1989US4888514 Driving apparatus for ultrasonic motor
12/13/1989EP0345920A2 Piezoelectric torque motor
12/05/1989US4885499 Ultrasonic driven type motor
11/1989
11/28/1989US4884090 Piezoelectric actuating device
11/28/1989US4884003 Compact micromotion translator
11/28/1989US4884002 Rotary or linear electric motor whose armature is driven by means of ultrasonic vibrations
11/28/1989US4883248 Shock preventing apparatus
11/21/1989US4882602 Photographic camera having a piezo-electric actuating element
11/21/1989US4882525 Method for controlling the working frequency of an electro-acoustic vibrating device
11/21/1989US4882500 Method for converting standing wave vibrations into motion and standing wave motor therefor
11/16/1989WO1989011163A1 Device for generating an elastic wave which advances along a closed trajectory
10/1989
10/18/1989EP0337389A2 Piezoelectric revolving resonator and single-phase ultrasonic motor
10/17/1989US4874980 Laminated mechanical amplification mechanism for piezoelectric elements
10/10/1989US4873544 Photographic camera having a piezo-electric actuating element
10/03/1989US4871939 Piezoelectric motor
10/03/1989US4871937 Vibration wave motor
09/1989
09/26/1989US4870700 Personal safety radio device
09/21/1989WO1989008945A1 Supersonic motor with magnetic encoder
09/19/1989US4868597 Photographic camera having a piezo-electric actuating element
09/19/1989US4868595 Photographic camera
09/19/1989US4868446 Piezoelectric revolving resonator and ultrasonic motor
09/19/1989CA1259710A1 Kinematic arrangement for the micro-movements of objects
09/14/1989DE3806535A1 Drive device for an ultrasound motor
09/08/1989WO1989007259A3 Integrated scanning tunneling microscope
09/08/1989WO1989007258A3 Integrated scanning tunneling microscope
08/1989
08/30/1989CN1035213A Travelling wave motor
08/29/1989US4860859 Brake device
08/16/1989EP0328363A2 Piezo electric actuator method and apparatus
08/15/1989US4857793 Vibration wave motor
08/15/1989US4857791 Linear motor
08/10/1989WO1989007259A2 Integrated scanning tunneling microscope
08/10/1989WO1989007258A2 Integrated scanning tunneling microscope
08/10/1989WO1989007256A1 An integrated mass storage device
08/09/1989EP0327372A1 Piezoelectric vibration generator and vibratory parts feeder incorporating the same
08/08/1989US4855633 Piezoelectric actuator
08/02/1989EP0325652A1 Gas laser having a piezoelectric fan
08/01/1989US4853579 Drive method for ultrasonic motor providing enhanced stability of rotation
08/01/1989US4853578 Driving apparatus for ultrasonic motor
07/1989
07/26/1989EP0325062A2 Travelling wave motor
07/13/1989DE3744513A1 Drive
07/04/1989US4845399 Laminated piezoelectric transducer
07/04/1989US4845357 Method of actuation and flight control
06/1989
06/21/1989EP0320996A2 Mechanical amplification mechanism for piezoelectric elements
06/21/1989EP0306530A4 Piezoelectric motor.
06/06/1989US4837516 Tuning device for nuclear magnetic resonance imaging apparatus and nuclear magnetic resonance imaging apparatus including the tuning device
05/1989
05/30/1989US4835434 Piezoelectric positioning element
05/23/1989US4833359 Driving apparatus for ultrasonic motor
05/23/1989US4833358 Vibration wave motor
05/17/1989EP0315933A2 Ultrasonic motor
05/16/1989US4831306 Piezoelectric motor having a pivotally mounted annular shaped housing
05/16/1989US4831305 Vibration wave motor
05/09/1989US4829209 Ultrasonic motor with stator projections and at least two concentric rings of electrodes
05/02/1989US4825894 Piezoelectric torque motor
04/1989
04/26/1989EP0313352A2 Ultrasonic motor
04/26/1989EP0313130A2 Rotary or linear electric motor in which the rotor in driven by ultrasonic vibrations
04/19/1989EP0312409A2 Ultrasonic driving device
04/13/1989DE3832658A1 Laminated adjusting element
04/05/1989CN1032272A Piezo-electric motor
03/1989
03/29/1989EP0309147A2 Monolithic piezoelectric bimorph
03/29/1989EP0308970A2 Piezoelectric motor
03/22/1989EP0307685A1 Servo-control method for the operating frequency of a sonic horn
03/21/1989US4814660 Piezoelectric motor with multilayer piezoelectric elements
03/16/1989DE3828564A1 Method for generating electrical energy in the field of mobile and non-mobile motor vehicles
03/15/1989EP0306530A1 Piezoelectric motor
03/14/1989US4812699 Drive control device in an ultrasonic vibration motor
03/07/1989US4810923 Vibration wave motor
02/1989
02/28/1989US4808084 Apparatus for transferring small amount of fluid
02/15/1989CN1031163A 压电电动机 Piezoelectric motor
02/14/1989US4803763 Method of making a laminated piezoelectric transducer
02/09/1989WO1989001259A1 Micropositioner systems and methods
02/09/1989WO1989001250A1 Gas laser having a piezoelectric fan
02/01/1989EP0301430A2 An ultrasonic driving device
02/01/1989EP0301429A2 An ultrasonic driving device
01/1989
01/26/1989WO1989000787A1 Lining material and ultrasonic wave drive motor using the lining material
01/18/1989EP0299771A2 Wave motor driving circuit
01/18/1989EP0299415A2 An ultrasonic driving device
12/1988
12/28/1988EP0296703A1 Brake actuating device
12/27/1988US4794294 Vibration wave motor
12/07/1988EP0294102A2 Travelling-wave motor
12/07/1988EP0293918A2 Linear motor
12/06/1988US4789803 Micropositioner systems and methods
12/01/1988DE3814829A1 Arrangement for twisting (rotating) a surface
11/1988
11/30/1988EP0292989A2 Apparatus and method for effecting fine movement by impact force produced by piezoelectric or electrostrictive element
11/29/1988US4788468 Vibration wave motor
11/22/1988US4786836 Piezoelectric motor
11/15/1988US4785177 Kinematic arrangement for the micro-movements of objects
11/09/1988EP0289734A2 An ultrasonic driving device
11/08/1988US4783610 Piezoelectric actuator