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6777856 |
Crystal element for piezo sensors
A piezoelectric crystal with transversal effect comprising: at least one plate; and, at least one base at an angle to the at least on plate, the at least one base projecting laterally beyond a...
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6774538 |
Multi-degree-of-freedom drive mechanism
In order to provide a multi-degree-of-freedom drive mechanism which is capable of preventing a malfunction with a simple structure, the multi-degree-of-freedom drive mechanism includes at least two...
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6774539 |
High pressure, high speed actuator
An actuator for applying an actuating force through a total displacement. The actuator includes: an actuator body; n piezo members supported by the body where n is an integer greater than or equal...
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6771005 |
Apparatus and method for adjusting the pre-load of a spring
A pre-loaded spring mechanism includes a piezoelectric device and a pre-loaded spring operatively connected to the device. A voltage source is coupled to the piezoelectric device to apply a voltage...
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6771004 |
Actuator using displacement element
Piezoelectric elements 10 and 10 ′ are driven so as to satisfy the relationship Nt=X0(1/(1/k2+1/k3)−1/(1/k1+1/k2+1/k3)) when the drive member, tip 20 , and driven member, rotor 40 , are...
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6765336 |
Precision positioning unit and linear movement control unit
A precision positioning unit composed of a table on which an article is to be placed, a linearly movable rod which is connected with the table at one end and further connected with a rod actuating...
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6765300 |
Micro-relay
A microstructure relay is provided, having a body that includes upper and lower portions. The lower portion is formed from a substrate, and the upper portion is formed on the substrate to avoid...
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6761028 |
Drive device
A drive device includes ceramic pumps which alternately pressurize and depressurize fluid within a fluid chamber on opposite sides of a movable body, to thereby move the movable body within the...
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6759790 |
Apparatus for moving folded-back arms having a pair of opposing surfaces in response to an electrical activation
A pizoelectric actuator assembly for actuating industrial control valves or clamps provides a compact actuator including a single piece main structure with integrated hinge, mechanical lever, and...
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6759787 |
Microelectromechanical apparatus for elevating and tilting a platform
A microelectromechanical (MEM) apparatus is disclosed which has a platform that can be elevated above a substrate and tilted at an arbitrary angle using a plurality of flexible members which...
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6753640 |
Piezoelectric driven type vibratory feeder
A piezoelectric driven type vibratory feeder having a working mass member that vibrates stably over an entire area of the working mass member is disclosed. The piezoelectric driven type vibratory...
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6747396 |
Piezoelectric actuator for ink jet printhead
A piezoelectric actuator for an ink jet printhead, including: a block body of piezoelectric material having a bottom face through which the mechanical energy of the actuator is transferred to a...
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6747398 |
Multilayer piezoelectric device and piezoelectric actuator formed using the same
A multilayer piezoelectric device includes long internal electrodes and short internal electrodes which are arranged so as to extend from a pair of opposing side surfaces of a piezoelectric...
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6739026 |
Method of manufacturing a head chip
A head chip is manufactured by disposing partition walls made of piezoelectric ceramic between a pair of opposing substrates made of a dielectric material so that the partition walls are spaced...
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6741012 |
Piezoelectric actuator
The small and light piezoelectric actuator of the present invention is capable of highly precisely positioning a magnetic head assemblies, etc. The piezoelectric actuator comprises: a movable...
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6737788 |
Apparatus having a pair of opposing surfaces driven by a piezoelectric actuator
The present invention provides an apparatus having at least one pair of opposing surfaces formed on a support structure for movement relative to one another and an actuator operably engaging the...
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6735854 |
Method for forming an electro-mechanical device
Described are various improved methods of forming stable metallization for electronic devices, electromechanical devices, force-sensing devices and accelerometers. Also described are various...
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6734602 |
Linear magnetostrictive actuator
Linear output motion of a substantial distance is imparted to the top plate of an actuator by forces produced within layers respectively formed by interconnectors on which magnetostriction material...
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6734607 |
Integrally fired, laminated electromechanical transducing element
An integrally fired, laminated electromechanical transducing element, fabricated using an inexpensive electrode material and having the electrode characteristic at least equivalent to that of the...
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6731048 |
Piezoelectric actuator with insulating member separate from piezoelectric device
In a piezoelectric actuator 1 using a laminated piezoelectric device 10 having a plurality of layered piezoelectric layers, a metal case 2 is provided on the outside of the side surface of...
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6731050 |
Piezoceramic multilayer actuators and a process for their manufacture
During operation, large tensile stresses act on the insulating region under the base metallization with external electrodes on piezoceramic multilayer actuators. Since this insulating region forms...
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6724129 |
Laminated piezoelectric element, method for manufacturing the same, and piezoelectric actuator
A laminated piezoelectric element includes a second connecting internal electrode electrically connected to a common external electrode that is located in a bottom portion, which lies below the...
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6724128 |
Smart sonic bearings for frictional force reduction and switching
An ultrastiff precision sonic bearing assembly and method thereof for controlling an effective coefficient of friction between two elements in slidable contact configured along an interface under a...
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6720710 |
Micropump
A microsized pump is set forth. It comprises a substrate which at least partially defines one or more walls of a longitudinally extending tunnel. The tunnel has a vibratable wall portion. A sonic...
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6720844 |
Coupled resonator bulk acoustic wave filter
A microwave filter made of acoustically coupled, bulk wave acoustic resonators. The resonators utilize piezoelectric materials sandwiched between conducting electrodes. Layers of material that...
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6720712 |
Piezoelectric identification device and applications thereof
An identification device having a piezoelectric sensor array is used to obtain biometric data. Multiplexers are switched to control the sensor. The device has several operating modes for obtaining...
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6717332 |
Apparatus having a support structure and actuator
An apparatus for use in an application including at least one of clamping and valving. The apparatus includes a support structure and actuator means for operating the support structure between a...
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6717333 |
Piezoelectric actuating device for controlling the flaps on the rotor blade of a helicopter
A piezoelectric actuating device for controlling a flap on a rotor blade of a helicopter includes a piezo element arrangement including at least one piezoelectric stack actuator. A power...
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6717337 |
Piezoelectric acoustic actuator
An acoustic actuator comprises a radially poled piezoelectric or electrostrictive drive element which is electroded on its inner and outer faces, and an acoustic diaphragm coupled to the upper...
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6713944 |
Actuator and method of manufacturing a strain element
There is provided a small and inexpensive actuator which has a simple structure and can obtain a large displacement. When voltage is applied to electrodes 2 a and 2 b formed on an inner...
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6713943 |
Actuator and driving method thereof
A truss type actuator including two piezoelectric devices drives a chip member provided at a crossing point of the piezoelectric devices for moving along an elliptic or a circular trail. The...
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6710518 |
Manually operable electronic apparatus
An electronic device such a telephone ( 100 ), PDA ( 600 ), or pager ( 800 ), includes a manually operable input such as an elastomeric key ( 102, 103 ) or button ( 814 ), or a touch screen ( 604 )...
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6710517 |
Electromechanical drive or sensor element for a measurement instrument, and method for their production
The invention relates to an electromechanical drive or a sensor element composed of piezoelectric elements arranged in the form of a stack. The drive or the sensor element is intended for...
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6707230 |
Closed loop control systems employing relaxor ferroelectric actuators
A closed loop motion control system employing at least one relaxor actuator which controls the position of a moving member having mass by controlling an electric field applied to the relaxor...
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6707231 |
Method and apparatus for controlling a piezo actuator
A method and apparatus for controlling a piezo-electric actuator coupled to a driven member is disclosed. The piezo-electric actuator is responsive to waveforms with asymmetrical voltage/current...
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6703765 |
Devices using a ceramic piezoelectric
An electromechanical vice includes a support structure, a component moveable with respect to the support structure, and a piezoelectric device mechanically coupled to both the support structure and...
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6703761 |
Method and apparatus for restraining temperature induced deformation of a piezoelectric device
Apparatuses and methods for controlling the temperature induced deformation of a piezoelectric device. A piezoelectric device receives an activation signal and displaces in a first direction for a...
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6703764 |
Pointing apparatus using piezoelectric film, method for producing the apparatus, apparatus and method for detecting pointing information thereof
A pointing apparatus using a piezoelectric film, a method for producing the apparatus, and apparatus and method for detecting pointing information therefor are provided. The pointing apparatus...
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6700307 |
Piezoelectric vibrator unit
Common internal electrodes and segment internal electrodes are laminated alternately with a piezoelectric material between and a common external electrode and a segment external electrode are...
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6698072 |
Method of manufacturing piezoelectric actuators
A method of manufacturing a plurality of piezoelectric actuators ( 1 ) includes the following operations: manufacturing of sheets ( 10 ) from a piezoelectric ceramic material, coating at least one...
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6700306 |
Laminated piezo-electric device
A laminated piezo-electric device comprising a pole-like laminate formed by alternately laminating piezo-electric layers and electrode layers in the direction of height, and a pair of outer...
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6700305 |
Actuator using a piezoelectric element
The present invention is an actuator using a piezoelectric element as a displacement element, wherein a drive signal voltage and current are reduced, and power consumption is reduced, while output...
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6685113 |
Actuator
An actuator ( 1 ), in particular for operation of fuel injectors in fuel injection systems of internal combustion engines, has in this embodiment a plurality of layers ( 2 ) of a piezoelectric or...
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6685306 |
Liquid droplet ejection device
A piezoelectric actuator providing a deformation of a liquid chamber wall at a reduced driving voltage applied to electrodes. A piezoelectric plate member is provided in which electrodes are...
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6677697 |
Force scanning probe microscope
A force scanning probe microscope (FSPM) and associated method of making force measurements on a sample includes a piezoelectric scanner having a surface that supports the sample so as to move the...
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6674219 |
Piezoelectric speaker
A piezoelectric speaker is disclosed, comprising an elastic base, a piezoelectric material bender, and an acoustical linkage mounted to both the elastic base and the bender and serving to...
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6664717 |
Multi-dimensional transducer array and method with air separation
Multiple layer elements for a transducer array are provided. Each element comprises two or more layers of transducer material. Various of the elements include one or more of: (1) multiple-layer,...
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6664711 |
Harmonic motor
A harmonic motor includes a first annular member, a second member, and device for flexing the first annular member. The first annular member has a longitudinal axis and is flexible. The second...
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6664712 |
Ultrasonic motors
An ultrasonic motor is described which uses radial vibrations of an electro-active material disc ( 7 ) amplified by one or more flextensional diaphragms ( 6 ) to drive a rotor ( 4 ) pressed in...
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6664713 |
Single chip device for voice communications
The present invention is a chip for use in a voice communication device. The chip provides for both bone conduction sensing and air conduction sensing. The chip includes a bone conduction sensing...
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