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| Number | Title | Issue Date |
| 8183743 | Tubular linear piezoelectric motor Tubular linear piezoelectric motor (100, 300), and a method for exciting a tubular piezoelectric resonator (101, 301) used in such motor. The motor is comprised of a resonator (101, 301) formed of a cylindrical tube. The tube has length n... | 05/22/2012 |
| 8063538 | Ultrasonic motor An ultrasonic motor includes a stator and a rotor. In the stator, an n number of piezoelectric elements (wherein n is a natural number) are affixed to one surface of a vibrating member, whose outer circumferential edge is circular or polygonal, along a direction in ... | 11/22/2011 |
| 8018124 | Stick-slip piezoelectric motor A piezoelectric motor including a rotor, a stator including a piezoelectric material having axial polarization, the stator including at least three pairs of electrodes spaced from one another on a top end face thereof and a common electrode on a base end face thereo... | 09/13/2011 |
| 7732980 | Electromechanical conversion element, vibration actuator, vibration actuator driving device, lens barrel and camera To provide an electromechanical conversion element, a vibration actuator, a vibration actuator driving device, a lens barrel and a camera, which facilitate the achievement of the desired drive characteristics. An electromechanical conversion element comprising: a pi... | 06/08/2010 |
| 7573624 | Piezoelectric-motor-driven two-axis orientation turret In the orientation device of a transmission assembly for orienting at least one beam in elevation and/or in bearing, said assembly pivots on a fork about an elevation axis and is driven about this axis by a motor supported by said fork, which fork can pivot on a bas... | 08/11/2009 |
| 7353585 | Method of poling ferroelectric materials A method of producing an actuator includes shaping a block of ferroelectric material to provide an active element of the actuator. The element includes a stack of ferroelectric layers with adjacent layers separated by electrodes arranged parallel to end faces of the... | 04/08/2008 |
| 7348710 | Robust electromechanical motor An electromechanical motor includes a rail to be moved, a dry, non-lubricated, sliding bearing for the rail, and driving members imposing a mechanical driving force on the rail. The bearing has two rail contacting portions. A first portion contacts the rail for obst... | 03/25/2008 |
| 7323632 | Percussion transducer A ring-shaped percussion transducer for converting a striking impact into a representative electrical pulse triggering signal is suitable for mounting on the center axis of a percussion instrument. In a preferred embodiment, the transducer is formed of a piezo elect... | 01/29/2008 |
| 7321182 | Oscillatory-wave actuator and method for driving oscillatory-wave actuator An oscillatory-wave actuator is provided capable of simplifying the structure of a driving circuit. Push-up vibration is formed in an oscillating body including three piezoelectrics and an elastic body by applying an AC voltage to the first piezoelectric. The second... | 01/22/2008 |
| 7288873 | Device for emission of high frequency signals A device for emission of high frequency signals is provided. The emission device is capable of emission of signals in the Gigahertz (GHz) and Terahertz (THz) range. The device may utilize, for example, a cantilever comprising a material that is capable of altering i... | 10/30/2007 |
| 7262546 | Piezoelectric/electrostrictive element and piezoelectric/electrostrictive device A piezoelectric/electrostrictive element including a substantially trapezoidal laminate having narrower and wider surfaces lying substantially in parallel to each other and first and second surfaces opposed to each other between the narrower and wider surfaces. The ... | 08/28/2007 |
| 7244151 | Linear propulsor with linear motion The invention comprises a scalable, configurable “propulsor” system. A propulsor system is an assembly of individual propulsors that act in concert to form a substantially continuous control surface that undulates in a working fluid. Each propulsor is driven and... | 07/17/2007 |
| 7245061 | Micro-beam friction liner and method of transferring energy A micro-beam friction liner adapted to increase performance and efficiency and reduce wear in a piezoelectric motor or actuator or other device using a traveling or standing wave to transfer energy in the form of torque and momentum. The micro-beam friction liner co... | 07/17/2007 |
| 7245058 | Vibration wave driving apparatus, and method of setting shape of support member supporting elastic member forming vibration member of vibration wave driving apparatus A vibration wave driving apparatus includes a vibration member in which an electro-mechanical energy conversion element is fixed to an elastic member, and a contact member pressed against a sliding part provided in the vibration member, so as to be kept in contact t... | 07/17/2007 |
| 7218029 | Adjustable compensation of a piezo drive amplifier depending on mode and number of elements driven An integrated circuit (42) provides drive signals to a piezo element (48) of a milli-actuator device (20) in a mass data storage device (10). The integrated circuit (42) includes a circuit (61) for selectively operating the ... | 05/15/2007 |
| 7218031 | Method for operating a piezoelectric motor, and piezoelectric motor comprising a stator in the form of a hollow-cylindrical oscillator The invention relates to a method for operating a piezoelectric motor having a stator in the form of a hollow-cylindrical oscillator, the at least one front side of which has frictional contact with a rotor and which comprises standing wave generators. According to ... | 05/15/2007 |
| 7215063 | Vibration element and vibration wave driving apparatus A vibration element for a vibration wave driving apparatus includes a first elastic member, a second elastic member, and an electro-mechanical energy conversion element disposed between the first and second elastic members. The electro-mechanical energy conversion e... | 05/08/2007 |
| 7204731 | Linear propulsor with radial motion The invention comprises a scalable, configurable “propulsor” system. A propulsor system is an assembly of individual propulsors that act in concert to form a substantially continuous control surface that undulates in a working fluid. Each propulsor is driven and... | 04/17/2007 |
| 7183699 | Stacked type electro-mechanical energy conversion element and vibration wave driving apparatus A stacked type electromechanical energy conversion element which is compact in size and capable of providing higher output power and enhanced operating efficiency. A plurality of electrode layers are formed, respectively, on one surfaces of a plurality of piezoelect... | 02/27/2007 |
| 7170217 | Stack-type piezoelectric device A stack-type piezoelectric device is provided in a configuration wherein an inactive layer is placed between an active layer with internal electrodes therein and a piezoelectric layer with terminal electrodes therein, and wherein the internal electrodes and the term... | 01/30/2007 |
| 7165746 | Vibration motor primary flight control actuator The invention provides an actuator for a control surface (7), in particular for a primary flight control of an aircraft, the actuator including a main actuator (3) in a main control line (1) for actuating the control surface (7), the actu... | 01/23/2007 |
| 7155979 | Self-calibrating oversampling electromechanical modulator and self-calibration method An oversampling electromechanical modulator, including a micro-electromechanical sensor which has a first sensing capacitance and a second sensing capacitance and supplies an analog quantity correlated to the first sensing capacitance and to the second sensing capac... | 01/02/2007 |
| 7129799 | Piezoelectric vibration element and piezoelectric filter A piezoelectric oscillator using zinc oxide as a piezoelectric plate which eliminates unwanted resonance called inharmonic overtone by optimizing ratio Le/H of driving electrode length Le to oscillator thickness H. Ratio Le/H is set between 4 and 100 in the piezoele... | 10/31/2006 |
| 7129618 | Control apparatus capable of low-speed driving of vibration type driving apparatus, actuating apparatus using the control apparatus, control method capable of low-speed driving of vibration type driving apparatus, and storage medium storing program including program codes capable of realizing the control method A control apparatus and a control method for a vibration type driving apparatus are disclosed which can maintain output performance even when low-speed driving is continued for a long time. The vibration type driving apparatus comprises a vibrating body and an elect... | 10/31/2006 |
| 7123113 | Regulated, symmetrical crystal oscillator circuit and method An oscillator circuit is provided that is preferably a crystal oscillator, where voltage placed across the crystal is regulated. The regulated voltage or amplitude of the cyclical signal across the crystal is monitored and maintained through a regulation circuit tha... | 10/17/2006 |
| 7117754 | Torque ripple sensor and mitigation mechanism A torque ripple sensor and method for torque ripple sensing and/or mitigation. A piezoelectric sensor is positioned relative to a motor so that torque fluctuations due to torque ripple of the motor are transmitted to the sensor, resulting in strain of a piezoelectri... | 10/10/2006 |
| 7095160 | Piezoelectric motor and method of exciting an ultrasonic traveling wave to drive the motor A rotary ultrasonic piezoelectric motor is provided and a method of exciting a flexure traveling wave to drive the motor. The motor includes a stator having a piezoelectric ceramic disc polarized in the radial direction and bounded by a top electrode and a segmented... | 08/22/2006 |
| 7005776 | Ultrasonic motor and electronic apparatus equipped with ultrasonic motor An ultrasonic motor comprises a piezoelectric vibrating member having a detecting polarized portion for detecting a drive signal having a drive frequency of the detecting polarized portion and a driving polarized portion for receiving the drive signal to oscillate t... | 02/28/2006 |
| 6995496 | Electrical power extraction from mechanical disturbances A method of extracting power includes coupling a transducer that converts mechanical power to electrical power to a disturbance; coupling an electrical circuit to the transducer such that a peak voltage experienced by the transducer is greater than two times higher ... | 02/07/2006 |
| 6952072 | Ultrasonic motor and electronic apparatus utilizing ultrasonic motor An ultrasonic motor has a piezoelectric vibrator driven by a voltage signal to undergo expansion and compression movement. At least two elastic bodies are connected to opposite ends of the piezoelectric vibrator and are vibrationally driven by the expansion and comp... | 10/04/2005 |
| 6951048 | Method for producing a stacked piezoelectric element A method for producing a stacked piezoelectric element by alternately stacking a plurality of layers of an electrode material and piezoelectric layers having an electro-mechanical energy converting function and provided with penetrating electrodes, which are obtaine... | 10/04/2005 |
| 6952073 | Vibration wave driving apparatus, vibration member and driving system for the vibration wave driving apparatus The present invention relates to a vibration wave driving apparatus including: a vibration member which has an electro-mechanical energy conversion element having a plurality of electrode regions that are fixed to an elastic member and polarized in the same directio... | 10/04/2005 |
| 6943481 | Vibration member and vibration wave driving apparatus The present invention has been devised in order to raise driving efficiency of the vibration wave driving apparatus. A vibration member of a vibration wave driving apparatus of the present invention comprises the vibration member constituted of an elastic member and... | 09/13/2005 |
| 6938462 | Device for measuring viscosity and/or density A device for measuring the viscosity and/or the density of a fluid using a resonator capable of mechanical vibrations. The resonator is capable of being brought into contact with the fluid. An oscillator circuit is also provided, wherein the oscillator circuit has a... | 09/06/2005 |
| 6940213 | Piezoelectric actuator The invention relates to a piezoelectric actuator, in particular for actuating control valves or injection valves of internal combustion engines in motor vehicles, having a circular, cylindrical piezoelectric actuator body in the form of a multilayered laminate made... | 09/06/2005 |
| 6933657 | Stacked electro-mechanical energy conversion element and method of manufacturing the same A stacked electro-mechanical energy conversion element includes a plurality of layers having a circular shape each of which is formed of a material having an electro-mechanical energy conversion function and has a through-hole in the center thereof, a plurality of e... | 08/23/2005 |
| 6927530 | Vibrating piece, vibrator, oscillator, and electronic device A vibrating piece in which a CI values ratio is maintained constant while minimizing the CI value of the fundamental wave, variations of the CI values between the vibrating piece devices are reduced even if the base is made short, and the entire vibrating piece can ... | 08/09/2005 |
| 6919669 | Electro-active device using radial electric field piezo-diaphragm for sonic applications An electro-active transducer for sonic applications includes a ferroelectric material sandwiched by first and second electrode patterns to form a piezo-diaphragm coupled to a mounting frame. When the device is used as a sonic actuator, the first and second electrode... | 07/19/2005 |
| 6915548 | Method for manufacturing quartz crystal tuning fork resonator, quartz crystal unit having quartz crystal tuning fork resonator, and quartz crystal oscillator having quartz crystal unit In method for manufacturing a quartz crystal tuning fork resonator capable of vibrating in a flexural mode, a quartz crystal wafer is etched in a first etching process to form a quartz crystal tuning fork base and quartz crystal tuning fork tines connected to the qu... | 07/12/2005 |
| 6909223 | Rotation/displacement converting actuator A rotation/displacement converting actuator has an actuator unit constituted by a displacing body and an actuator in which the displacing body can be linearly displaced. The actuator has a pair of plate-shaped bases, a rotor, a vibrating element that rotates the rot... | 06/21/2005 |
