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| Number | Title | Issue Date |
| 8183744 | Piezoelectric motor A piezoelectric motor includes a piezoresonator body (3) having opposing front and back surfaces and opposing first and second end surfaces. The front (17) and the back (18) surfaces are substantially parallel to first (15) and second ( | 05/22/2012 |
| 8179020 | Vibratory actuator and drive device using the same A vibratory actuator is provided in which a movable body can be stably driven even when a groove is formed in an abutment body by the friction between the driver element and the abutment body. An ultrasonic actuator (2) includes an actuator body (4) wh... | 05/15/2012 |
| 8058773 | Ultrasonic motor and ultrasonic vibrator An ultrasonic motor includes a driven object, a piezoelectric element for driving the driven object, a vibration plate including a notch having an inner peripheral surface of an arc-shaped form having a central angle larger than 180 degrees and being vibrated by the... | 11/15/2011 |
| 8013496 | Piezo electric linear motor The present invention relates to a piezoelectric linear motor that can make relatively low abrasion and accurate linear movement since stationary AC voltages are applied to two piezoelectric elements with a phase difference. The present invention provides a piezoele... | 09/06/2011 |
| 7960897 | Ultrasonic motor An ultrasonic motor produces elliptical vibration by inducing longitudinal vibration and flexural vibration at the same time and drives a driven body by obtaining a drive power from the elliptical vibration. The ultrasonic motor includes a piezoelectric device, rein... | 06/14/2011 |
| 7932661 | Piezoelectric vibrator for ultrasonic motor In the invention, each piezoelectric element for a vibrator for an ultrasonic motor has electrode regions for exciting stretching vibration and flexural vibration separately. Thus, the invention provides a vibrator for an ultrasonic motor, in which electrodes are pr... | 04/26/2011 |
| 7923900 | Ultrasonic motor An ultrasonic motor, which drives a driven member using an elliptical vibration produced by synthesizing a longitudinal vibrational mode and a flexural vibrational mode as a drive force, is configured as follows. Namely, the ultrasonic motor includes a piezoelectric... | 04/12/2011 |
| 7808154 | Actuator unit, driving device for information recording/reading head, information recording/reading apparatus, and method for driving the actuator unit An actuator unit including a friction drive actuator, a driving device for information recording/reading head, an information recording/reading apparatus and a method for driving the actuator unit which can achieve both high precision and high speed is provided by w... | 10/05/2010 |
| 7687974 | Vibration type driving apparatus A vibration type driving apparatus includes a vibrating member configured to simultaneously generate a plurality of standing wave vibrations to cause an elliptic motion on surfaces located at nodes of the standing wave vibration, a driving unit formed on the surface... | 03/30/2010 |
| 7663292 | Ultrasonic actuator An ultrasonic actuator includes: a piezoelectric element 10 producing stretching and bending vibrations; driver elements 2, 2 placed on the piezoelectric element 10 so as to be actuated in accordance with the vibrations of the piezoelectric elem... | 02/16/2010 |
| 7646136 | Piezoelectric element, vibratory actuator and drive unit A piezoelectric element is formed by stacking piezoelectric layers and internal electrode layers. The internal electrode layers are positive and negative electrode layers. The positive electrode layers are first and second positive electrode layers. The negative ele... | 01/12/2010 |
| 7592738 | Ultrasonic motor With the invention, both a longitudinal vibration mode and a flexural vibration mode are independently detected, or only the longitudinal vibration mode is detected, without using a special device. The invention provides an ultrasonic motor including electromechanic... | 09/22/2009 |
| 7508114 | Ultrasonic motor It is an object to provide an ultrasonic motor that can stably and finely (that is, minutely) move a driven body. The invention provides an ultrasonic motor comprising an ultrasonic vibrator which includes an electromechanical transducer and which is configured to s... | 03/24/2009 |
| 7466062 | Vibration wave motor and lens barrel A vibration wave motor includes a housing, a rotor, a bearing member, a vibrator serving as an actuator and having a support shaft and a driving element, and a leaf spring having a pressing protrusion. The vibrator is slidably disposed in an opening of the housing a... | 12/16/2008 |
| 7459832 | Electro-mechanical energy converter and vibration wave driving At least one exemplary embodiment is directed to an electro-mechanical energy converter and a vibration wave driving apparatus that can facilitate miniaturization, high power, low cost and low voltage drive, by using a polygonal piezoelectric element with a pluralit... | 12/02/2008 |
| 7436101 | Multistage piezoelectric drive A piezoelectric motor comprising a vibratory element is configured to move a first driven element by vibrations generated by the vibratory element. A second driven element is brought into frictional contact with the first driven element to form a multistage piezoele... | 10/14/2008 |
| 7425770 | Vibration wave motor Provided is a vibration wave motor including a pressurizing mechanism and a guide mechanism which are used for a moving member and can be thinned. The influence of a restoring force can be eliminated. The vibration wave motor includes an elastic vibration member whi... | 09/16/2008 |
| 7378777 | Drive apparatus and device with same A rotary drive device is configured to be reduced in size while still delivering a prescribed torque. The rotary drive device has a base part with a vibrating body and a rotating body attached to the base part. The vibrating body has at least one piezoelectric eleme... | 05/27/2008 |
| 7365474 | Driving system for vibrating type actuator and method of driving vibrating type actuator Provided is a driving system for a vibrating type actuator capable of simplifying a driving circuit. A vibrating body of the vibrating type actuator can generate a first mode and a second mode which are different in a vibration form, in accordance with an alternate ... | 04/29/2008 |
| 7362036 | Ultrasonic oscillator An ultrasonic oscillator, comprises a group of internal electrodes divided into four approximately equal parts along two directions, i.e., a second direction which is perpendicular to a direction of layers as first direction, and a third direction which is also perp... | 04/22/2008 |
| 7357031 | Precision sensor assembly for rotating members in a machine tool A precision sensor assembly for rotating members in a machine tool comprises a rotor unit (16) rigidly fixed to a rotor portion (2a) of the machine tool and including a sensor (5) for detecting vibrations produced by the operation of the ... | 04/15/2008 |
| 7355325 | Wide frequency range electromechanical actuator An electromechanical motor (1), using at least two bimorph, monomorph or multimorph electromechanical actuating elements (6) interconnected by a common actuator backbone (5) is disclosed. The actuating elements (6) are controllable in bot... | 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 |
| 7317275 | Harmonic propulsion and harmonic controller A device and method for propelling objects using periodic or harmonic vibrations is described. The device comprises a flexible substrate or surface and a source of vibrational energy that is applied to the substrate or surface. Specific embodiments include a device ... | 01/08/2008 |
| 7301257 | Motion actuator The present invention provides a shear motion driven motion actuator. The motion actuator provides a plurality of driving modes to drive a main body, including the inertial drive mode, the friction drive mode and the scanning mode. The motion actuator comprises a ba... | 11/27/2007 |
| 7301259 | Vibration type driving apparatus A vibration type driving apparatus capable of inhibiting wear in an elastic member and a contact member is provided. The vibration type driving apparatus is a vibration type driving apparatus relatively driving an elastic member given vibrations by an electric-mecha... | 11/27/2007 |
| 7274131 | Piezoelectric motor with actuator to move the rotor about two orthogonal axes A piezoelectric motor has an actuator which drives a slider. The actuator has a rectangular steel core of square cross-section with an axially projection driving tip. A ceramic piezoelectric element is bonded to each of the four faces of the core. Each piezoelectric... | 09/25/2007 |
| 7268464 | Ultrasonic motor An ultrasonic motor includes an annular stator, a rotor, a rectangular parallelepiped multilayer piezoelectric transducer, a support shaft, three transducers with drivers, a holder for holding the transducers with an elastic plate therebetween, and a leaf spring for... | 09/11/2007 |
| 7265480 | Vibration wave linear motor and a driving method thereof A vibration wave linear motor is a vibration wave linear motor that can drive a plurality of driving targets with a simple and small configuration. In the linear motor, two guide members sandwich two vibrators, which are individually and electrically connected to a ... | 09/04/2007 |
| 7259497 | Vibration wave motor The vibration wave motor of the present invention comprises a body to be driven, and a plurality of vibrators each of which is provided with a drive contact part contacting the outer surface of the body to be driven, is connected to a base and is disposed around the... | 08/21/2007 |
| 7256531 | Driving apparatus A driving apparatus of the invention comprises a fixed member, a piezoelectric element fixed at one end to the fixed member, and a driving friction member fixed to the other end of the piezoelectric element. The driving apparatus of the invention is arranged to move... | 08/14/2007 |
| 7253552 | Piezoelectric actuator, timepiece, and portable device A rectangular vibrating plate 10 in which a piezoelectric element and a reinforcing plate are stacked is supported on a main plate by a support member 11, and is urged toward the rotor 100 by an elastic force of the support member 11. Thi... | 08/07/2007 |
| 7242131 | Ultrasonic motor An ultrasonic motor includes rotors and an annular stator, which are integrated in the rotational direction, a rectangular parallelepiped multilayer piezoelectric transducer, a support shaft, and a transducer with drivers. The support shaft is attached to the outer ... | 07/10/2007 |
| 7230366 | Vibration wave linear motor In a vibration wave linear motor, a vibrator stably operates with a simple and small configuration. Both ends of a movable guide member are held by shaft bearing long holes to freely oscillate, and an angle of an inclination φ occurs according to the move of the vi... | 06/12/2007 |
| 7221076 | Multiple movements harmonic frequency actuator system A system having a harmonic frequency actuator system is provided including providing an actuator body, the actuator body having more than one set of fingers for generating a motion for a semi-rigid element, and attaching a high frequency actuator to the actuator bod... | 05/22/2007 |
| 7208861 | Electromechanical drive element In manufacturing electromechanical drive elements, vibration properties are defined in a test environment. These properties are found to give a good operation when being arranged in a motor. Two flexural vibration modes are defined. One is an s-mode connected to an ... | 04/24/2007 |
| 7205703 | Ultrasonic vibrator and ultrasonic motor using the ultrasonic vibrator In an ultrasonic vibrator in which ultrasonic elliptical vibration is caused at a friction-projection by the simultaneous generation of a first vibration mode and a second vibration mode in a piezoelectric element, the friction-projection is formed by burning so as ... | 04/17/2007 |
| 7199507 | Piezoelectric motors and motor driving configurations A piezoelectric motor comprising: a piezoelectric vibrator having an axis of symmetry and a first vibration mode, which when excited generates oscillatory motion of mass points in the vibrator parallel to the axis of symmetry; and at least one friction nub having a ... | 04/03/2007 |
| 7187103 | Piezoelectric drive A piezoelectric drive that is used to create a relative movement between a first and a second body on a plane of movement. The drive includes a flat metal sheet (1) that forms, or is secured to, the first body and that is arranged parallel to the plane of mov... | 03/06/2007 |
| 7173362 | Vibratory motors and methods of making and using same A single piezoelectric is excited at a first frequency to cause two vibration modes in a resonator producing a first elliptical motion in a first direction at a selected contacting portion of the resonator that is placed in frictional engagement with a driven elemen... | 02/06/2007 |
