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| Number | Title | Issue Date |
| 7834518 | Linear ultrasound motor The invention relates to a linear ultrasound piezoelectric motor comprising a mobile element that is in frictional contact with a plate-like rectangular resonance plate, wherein the frictional surface is embodied by means of at least one of the longitudinal narrow s... | 11/16/2010 |
| 7800283 | Screw driving device and screw To provide a screw fastening device that, when performing a screw tightening operation, can substantially reduce the running torque directly applied by external force 5 to a screw driving device. A characteristic constitution is adopted that is equips a screw... | 09/21/2010 |
| 7683523 | Ultrasonic actuator An ultrasonic actuator (3) includes an actuator body (4) performing a plurality of vibrations including a bending vibration, and a driver element (5) which is attached to a long side surface (40b) of the actuator body (4), a... | 03/23/2010 |
| 7576474 | Piezoelectric motor A piezoelectric motor for generating an elliptic motion by adding a longitudinal vibration to a bending-direction vibration is provided. The piezoelectric motor includes a piezoelectric member which generates a first vibration mode and a second vibration mode simult... | 08/18/2009 |
| 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 |
| 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 |
| 7285895 | Ultrasonic medical device and method Ultrasonic devices having transducer assembly including a stack of alternating electrodes and piezoelectric elements. A mounting device having a first and second end is adapted to receive ultrasonic vibration from the stack and transmit it from the first to the seco... | 10/23/2007 |
| 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 |
| 7170214 | 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 ... | 01/30/2007 |
| 7148605 | Biaxial piezoelectric motor A piezoelectric motor that allows movement of an arbitrary object in an arbitrary direction is described. The piezoelectric motor includes at least two piezoelectric drives positioned to direct energy at an angle to each other. A contact element translates the energ... | 12/12/2006 |
| 7119477 | Replaceable friction coupling for piezoelectric motors A piezoelectric motor comprising: a piezoelectric vibrator (50) having a surface comprising a localized non-planar shaped first surface region thereon which first surface region has a shape different from the shape of the surface on which it is located; and a... | 10/10/2006 |
| 7057328 | Acoustic driver assembly for a spherical cavitation chamber An acoustic driver assembly for use with a spherical cavitation chamber is provided. The acoustic driver assembly includes at least one transducer, a head mass and a tail mass, coupled together with a centrally located threaded means (e.g., all thread, bolt, etc.). ... | 06/06/2006 |
| 7049730 | Acoustic driver assembly for a spherical cavitation chamber An acoustic driver assembly for use with a spherical cavitation chamber is provided. The acoustic driver assembly includes at least one transducer, a head mass and a tail mass, coupled together with a centrally located threaded means (e.g., all thread, bolt, etc.). ... | 05/23/2006 |
| 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 |
| 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 |
| 6958568 | Acoustic driver assembly for a spherical cavitation chamber An acoustic driver assembly for use with a spherical cavitation chamber is provided. The acoustic driver assembly includes at least one transducer, a head mass and a tail mass, coupled together with a centrally located threaded means (e.g., all thread, bolt, etc.). ... | 10/25/2005 |
| 6956316 | Acoustic driver assembly for a spherical cavitation chamber An acoustic driver assembly for use with a spherical cavitation chamber is provided. The acoustic driver assembly includes at least one transducer, a head mass and a tail mass, coupled together with a centrally located threaded means (e.g., all thread, bolt, etc.). ... | 10/18/2005 |
| 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 |
| 6940209 | Ultrasonic lead screw motor An apparatus for driving a threaded shaft assembly that contains a threaded shaft with an axis of rotation and, engaged therewith, a threaded nut. Subjecting the threaded nut to ultrasonic vibrations causes the threaded shaft to simultaneously rotate and translate i... | 09/06/2005 |
| 6825590 | 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 ... | 11/30/2004 |
| 6781283 | Vibration element and vibration wave driving apparatus A vibration wave driving apparatus includes an electro-mechanical energy conversion element that is sandwiched and fixed between elastic members, in which a flange-shaped elastic member is provided between the electro-mechanical energy conversion element and one of ... | 08/24/2004 |
| 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 |
| 6710516 | Vibration wave during apparatus A vibration wave driving apparatus includes a vibration member having an electro-mechanical energy conversion element and a vibration member supporting member fixed to an elastic member, each having a through-hole in the axial portion thereof; the apparatus further ... | 03/23/2004 |
| 6661159 | Construction for transmitting displacement of piezoelectric element Structure for transmitting displacement of a piezoelectric element includes a piston member. A distal-end plate portion has a receiving face adapted to be brought into direct contact with a distal-end face of the piston member. The distal-end face of the ... | 12/09/2003 |
| 6617758 | Integrated charge and voltage mode drive circuit for piezo actuators used in mass data storage devices, or the like A driver (40) for supplying drive signals to a piezo element (48) of a milli-actuator device (21) in a mass data storage device (10) in a charge mode of operation has a first circuit (96, 98) for providing a charging current to a sense capacitor (58) in r... | 09/09/2003 |
| 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 |
| 6278218 | Apparatus and method for tuning ultrasonic transducers A method of manufacturing high power sandwich type ultrasonic transducers and, more particularly, a new method of tuning high power sandwich type ultrasonic transducers without the need for a trimming process. A method in accordance with the present inven... | 08/21/2001 |
| 6198202 | Vibration actuator A vibration actuator has a vibration member for generating a vibration, and a contact member which contacts the vibration member and moves relative thereto when the vibration member vibrates. A portion of the vibration member, which is in sliding-contact ... | 03/06/2001 |
| 6166477 | Ultrasonic motor with rotor converting longitudinal vibrations into torque An ultrasonic motor having a stator in which at least a longitudinal vibration is generated and a rotor rotatably mounted on the stator. Slanted slits are formed on the cylindrical surface of the rotor, which convert a part of the longitudinal vibration i... | 12/26/2000 |
| 6140741 | Vibration type actuator A vibration type actuator comprises an electro-mechanical energy conversion element, a plurality of elastic members sandwiching the conversion element therebetween, a fastening member for fastening the plurality of elastic members, a movable member contac... | 10/31/2000 |
| 5633553 | Vibration driven motor In a vibration driven motor, a rotatable member is brought into frictional contact with a vibration member having an electro-mechanical energy conversion element and by the application of an AC electric field to the electro-mechanical energy conversion el... | 05/27/1997 |
| 5600196 | Vibration driven motor A vibration driven motor is arranged so that a vibration member and a movable member are moved relative to each other by utilizing non-travelling vibration. A supporting member for the motor is disposed at the position of the loop of the aforesaid vibrati... | 02/04/1997 |
| 5574326 | Vibration actuator A vibration actuator includes a substantially rod-shape vibration member, and an electro-mechanical energy conversion element for vibrating the vibration member. The vibration member is vibrated by mechanical energy from the conversion element, thereby mo... | 11/12/1996 |
| 5508580 | Vibration wave driven motor According to this invention, a piezo-electric element as an electro-mechanical energy conversion element is urged against a vibration member, and a vibration is excited in the vibration member by a vibration produced in the piezo-electric element. Thus, a... | 04/16/1996 |
| 5440190 | Ultrasonic motor An ultrasonic motor comprising a vibrator for generating ultrasonic vibration, an electric-mechanical energy conversion element provided at node positions of the ultrasonic vibration, for generating ultrasonic vibration on the vibrator, the vibrator havin... | 08/08/1995 |
| 5428260 | Vibration driven motor In a vibration driven motor, a rotatable member is brought into frictional contact with a vibration member having an electro-mechanical energy conversion element and by the application of an AC electric field to the electro-mechanical energy conversion el... | 06/27/1995 |
| 5410204 | Ultrasonic oscillator The present invention discloses an ultrasonic oscillator including: a plurality of resonators; and an electricity-to-mechanical energy conversion element disposed among a plurality of the resonators and pressed by a fastening member, wherein the ultrasoni... | 04/25/1995 |
| 5387835 | Vibration driven motor In a vibration driven motor or actuator, which has members for generating a first bending vibration and a second bending vibration in a direction different from the first bending vibration therein, and in which a combined vibration of the first bending vi... | 02/07/1995 |
| 5384508 | Modular unit for a tubular ultrasonic reactor Modular reactor unit for continuous ultrasonic processing of substances and/or reagents, characterized in that it comprises a tubular metallic body having a cylindrical inner surface and a straight circular cross secton, open at its feed and discharge end... | 01/24/1995 |
| 5359251 | Vibration driven actuator A vibration driven motor or actuator includes a vibrating member for generating a vibration therein in response to an electrical signal applied thereto, and a contact member frictionally engaged with the vibrating member to be driven by the vibration. The... | 10/25/1994 |
