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