Class 310/323.08 - Armature

Subclass of Class 310 - Electrical generator or motor structure
Definition: Subject matter having a specific detail directed to the
No. of patents: 40
Last issue date: 05/12/2009

Number	Title	Issue Date
7531942	Ultrasonic rotary drive device An ultrasonic rotary drive device includes an ultrasonic motor including an ultrasonic generating portion and a first rotary output portion, wherein the first rotary output portion is in contact with the ultrasonic generating portion to be rotatable relative to the ...	05/12/2009
7402935	Ultrasonic motor An ultrasonic motor is provided with a circular stator including a piezoelectric element and a comb teeth body and a circular rotor supported by a rotating shaft and disposed in close contact with the comb teeth body. The stator and the rotor are magnetized in oppos...	07/22/2008
7365475	Ultrasonic motor An ultrasonic motor includes a circular stator having a piezoelectric element and a comb-tooth body having a plurality of comb teeth which are circumferentially arranged thereon, and a circular rotor having a rotation shaft, the circular rotor being in press-contact...	04/29/2008
7360750	Piezoelectric air valve and multiple-type piezoelectric air valve The air valve includes a valve body for controlling operations to open and close the communication between an air pressure chamber and an air outlet, a piezoelectric element for generating driving force in the form of displacements, and a displacement enlarging mech...	04/22/2008
7339306	Mechanism comprised of ultrasonic lead screw motor An optical assembly that contains an optical device movably attached to a apparatus for driving a threaded shaft assembly. The apparatus contains of a threaded shaft with an axis of rotation and, engaged therewith, a threaded nut. The assembly contains a device for ...	03/04/2008
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
7187104	Vibration-type driving device, control apparatus for controlling the driving of the vibration-type driving device, and electronic equipment having the vibration-type driving device and the control apparatus A vibration-type driving device comprises a vibration element including a driving member and an electro-mechanical energy conversion element having an electrode and arranged to displace the driving member with a driving signal supplied to the electrode, and a driven...	03/06/2007
7157830	Near-resonance wide-range operating electromechanical motor The present invention combines bending mode mechanical (frm) and electrical (fre) resonances, whereby a relatively good efficiency can be achieved within a relatively broad frequency range (Δf3). An electrical resonance (frc	01/02/2007
7105987	Piezoelectric motor and method for actuating same The piezoelectric motor (6) comprises a stator (1) and a runner (4) which form a gap (7) as well as comprising a piezoelectric transducer (3) which is connected to the stator (1) or the runner (4) and which with the s...	09/12/2006
7067958	Wide frequency range electromechanical actuator An electromechanical actuator 10 is disclosed, having drive elements (14a–d) movable in two dimensions and connected to an actuator backing (12). The actuator backing (12) is made of a material being ferromechanically inactive. F...	06/27/2006
7034438	Vibration type driving apparatus A vibration type driving apparatus, which is capable of increase of output torque and rotational speed without increasing the size of a vibration body, is described. The apparatus comprises a vibration body which generates vibration by supplying a driving signal to ...	04/25/2006
7019437	High-efficiency piezoelectric single-phase uni-polar ultrasonic actuators with a notched PZT back disc Disclosed herein is a high efficiency piezoelectric single phase uni-polar supersonic actuator which is composed of an upper back disc, a PZT plate an electrode, a lower back disc, a pivotal bolt and a fixing nut. The PZT plate and its electrode are interposed betwe...	03/28/2006
7015623	Vibration type drive unit A vibration type drive unit comprises a vibrator made of an elastic body to which an electromechanical energy conversion element is fixed and a moving element which is in contact with a surface of the vibrator so that by applying an alternating signal to the electro...	03/21/2006
6991573	Steering actuator of independent steer-by-wire system A steering actuator of an independent type steer-by-wire system comprises a housing fixed to a vehicle body and an ultrasonic motor. The ultrasonic motor has a stator internally fixed to the housing and a rotator rotating relative to the stator when an electric curr...	01/31/2006
6979935	Piezoelectric motor and electronic equipment with piezoelectric motor A piezoelectric motor has a vibrating body for undergoing vibrational movement in accordance with a vibration wave, a contact member disposed in contact with and driven by the vibrating body during vibration thereof, and a support member for supporting the vibrating...	12/27/2005
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
6946979	Encoder having electrode pattern with pairs of non-conductive portions and multiple sliders that contact the electrode pattern An encoder includes a rotary member having a predetermined electrode pattern and a fixed member having multiple channel contacts which are opposed to the electrode. The rotary member has stable reference phases where at most one pair of the contacts is ON (in electr...	09/20/2005
6762535	Spindle structure in ultrasonic machine and supporting horn used in the same The present invention is to provide a spindle structure of an ultrasonic machine which can reduce the number of assembling steps, can improve working accuracy, and can reduce heat generation due to an ultrasonic wave leakage during the working process. The spindle s...	07/13/2004
6463642	Method of manufacturing a vibration type driving apparatus A method of manufacturing a vibration type driving apparatus comprising an elastic member which, in use, is excited with a vibration that sets a moving member into motion relative to the vibrating elastic member. The method includes providing a friction m...	10/15/2002
6433463	Method and apparatus for stress pulsed release and actuation of micromechanical structures Micromechanical parts are freed from a surface of a substrate to which the parts are stiction bonded by applying a pulse stress wave to the substrate that propagates through the substrate and is reflected at the surface to which the micropart is stiction ...	08/13/2002
6433462	Ultrasonic motor and method for manufacturing the same An ultrasonic motor includes a stator, which includes a piezoelectric element, and a rotor, which opposes the stator. The piezoelectric element vibrates the stator to rotate the rotor. The rotor has an annular thin section. An elastic ring is secured to t...	08/13/2002
6388365	Traveling wave ultrasonic motor A traveling wave ultrasonic motor includes a ring-shaped stator (2) and two groups of electromechanical transducers (3 to 6). Each group comprises a pair of diametrically opposed longitudinal transducers, polarized in opposite directions, disposed perpend...	05/14/2002
6366004	Ultrasonic motor An ultrasonic motor includes a stator and a rotor. The stator has piezoelectric elements. When an alternating current having a predetermined frequency is applied to the piezoelectric elements, the elements axially vibrate. The stator axially vibrates in r...	04/02/2002
6198201	Vibration wave apparatus A vibration wave apparatus includes a plurality of vibration member groups. Each vibration member group includes a plurality of vibration members having respective driving portions in which driving vibration waves are generated, where the respective drivi...	03/06/2001
6107723	Vibrating type driving device A vibrating type driving device is constructed by a vibration member in which a vibration is excited, a moving member which is come into contact with the vibration member and is rotated, an output shaft which is coupled to the moving member and is rotated...	08/22/2000
5990597	Ultrasonic motor having high drive efficiency An ultrasonic motor has a stator having a piezoelectric member vibrated by a drive signal, and an elastic member for generating traveling vibration wave in a drive surface thereof upon vibration of the piezoelectric member, a rotor which is urged against ...	11/23/1999
5610468	Ultrasonic step motor An ultrasonic step motor includes a stator and a rotor. A vibrator is mounted on the stator and a driving mechanism excites the vibrator causing the stator to induce a vibrating mode on the rotor. The rotor has a vibration mode in a selected direction and...	03/11/1997
5578887	Vibration actuator A vibration actuator including a ring-like vibration member for generating a vibration and a ring-like contact member having a contact portion which is in contact with the vibration member. The contact member and the vibration member are moved relative to...	11/26/1996
5418417	Piezoelectric motor A piezoelectric motor. Such motor includes a support (2), a stator (S2, S3) fixed to the support (2), piezoelectric means (10) adapted to be electrically excited so as to induce a vibratory motion in the stator (S2, S3), a rotor (R2, R3) mounted for rotat...	05/23/1995
5233257	Piezo-electric motor The instant invention relates to a piezo-electric motor. The motor comprises: a support (2) a stator (8) integral with the support (2) a rotor (30) rotatably mounted with respect to the support, the rotor being capable of being displaced in a displacement plan...	08/03/1993
5229678	Drive control unit for an ultrasonic step motor An ultrasonic step motor includes a rotor having projections which extend toward a flexible stator. Piezoelectric elements are connected to and spaced along the circumference of the stator. A drive control unit applies driving signals to the vibrators to ...	07/20/1993
5204577	Ultrasonic motor improved in driving efficiency An ultrasonic motor incomprises a stator including a piezoelectric element and an elastic body capable of producing progressive vibration waves on its drive surface by excitation of the piezoelectric element, and a rotor which is driven by the progressive...	04/20/1993
5189331	Vibration wave driven motor The present invention provides a vibration wave driven motor or actuator in which a discontinuous coupling member is provided between a vibration member and a load to be driven by a movable element. The coupling member blocks undesirable travelling wave t...	02/23/1993
5099166	Vibration wave driven motor A vibration wave driven motor includes a vibrating member for generating a travelling vibration wave in response to signals applied thereto a movable body having a frictional member contacting the vibrating member, a bearing member and a vibration damper ...	03/24/1992
5056201	Method of making a travelling-wave motor A travelling-wave motor utilizes a flexible travelling waves generated in a stator for driving a rotor. The stator has an elastic vibrating body and a ceramic piezoelectric vibrator provided on one side of the elastic vibrating body. The central portion o...	10/15/1991
5028833	Ultrasonic motor An ultrasonic motor, comprises an annular stator including an elastic member and piezo-electric elements secured to said elastic member which generate a travelling wave on the surface of the elastic member by being applied with high frequency voltages; an...	07/02/1991
4752711	Vibration wave motor A vibration wave motor for driving a moving member contacting a vibration member, to which an electro-mechanical energy transducer element is bonded, by a travelling vibration wave generated in the vibration member, wherein the moving and vibration member...	06/21/1988
4692650	Vibration wave motor A vibration wave motor is driven at a high efficiency by arranging a contact area of a movable member which contacts a vibration member such that a displacement locus in the contact area is essentially coincident with a vibration locus in the vibration me...	09/08/1987

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Class 310/323.08 - Armature