Patents by Inventor Nobuo Takahashi

Nobuo Takahashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6988301
    Abstract: A matrix type piezoelectric/electrostrictive (P/E) actuator includes a plurality of piezoelectric/electrostrictive elements, each including a piezoelectric/electrostrictive body and at least one pair of electrodes formed on a ceramic substrate. The matrix type P/E actuator is activated by the displacement of the piezoelectric/electrostrictive bodies. The piezoelectric/electrostrictive elements are joined to the ceramic substrate as respective unified bodies, and are two-dimensionally arranged independently from each other. The piezoelectric/electrostrictive actuator provides a greater displacement with a lower voltage, a high responsive speed, and a greater generating force, as well as enhancing the mounting ability and the integration. A method for manufacturing such a matrix type P/E actuator is also disclosed.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: January 24, 2006
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi, Koji Kimura
  • Publication number: 20060002596
    Abstract: A vast buffer memory space capable of storing all of partial fingerprint images read by a sweep type fingerprint sensor is made unnecessary in generating feature information of a fingerprint. A fingerprint reading system includes a sweep type fingerprint sensor, a memory which stores partial fingerprint images read by the sensor, and a processor connected to the sensor. The processor includes an image acquisition unit which successively acquires partial fingerprint images read by the sweep type fingerprint sensor and preserves them in the memory, a position calculation unit which calculates position information of a partial fingerprint image, an image division unit which cuts out a unique unit image corresponding to an image region having a predetermined area from the partial fingerprint image on the basis of the position information, and a feature extraction unit which extracts feature information of the unit image.
    Type: Application
    Filed: July 5, 2005
    Publication date: January 5, 2006
    Inventor: Nobuo Takahashi
  • Publication number: 20050273990
    Abstract: A piezoelectric actuator includes comb teeth-shaped piezoelectric actuators, each comprising plural piezoelectric layers. A side surface of each tooth is fired. Actuators are made by (1) preparing a plurality of piezoelectric material green sheets on which electrode films are formed and forming slits on a first green sheet using a punch and a die, (2) pulling up the first green sheet using a stripper, (3) pulling up a top portion of the punch slightly from the lowest portion of the pulled up first green sheet, (4) forming second slits in a second green sheet by the punch, (5) pulling up the second green sheet jointly with the first green sheet, and (6) pulling up the top portion of the punch slightly from the lowest portion of the pulled up second green sheet, and thereafter laminating green sheets by repeating steps (4) through (6). The layers can thereafter be fired.
    Type: Application
    Filed: June 22, 2005
    Publication date: December 15, 2005
    Applicant: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi
  • Publication number: 20050263639
    Abstract: A magnetic tape pullout apparatus adapted to pull out an end portion of a magnetic tape by adsorbing a circumferential surface of a wound magnetic tape, and provided with a tape pullout jig which is disposed so that a front end portion thereof can touch an outer circumferential surface of a wound magnetic tape, and which has on the lower side of this front end portion an adsorption portion for adsorbing the magnetic tape thereto, a support member adapted to rotatably support the tape pullout jig in the radial direction of the wound magnetic tape, and a slide mechanism adapted to move the support member in the tangential direction of the wound magnetic tape.
    Type: Application
    Filed: May 27, 2005
    Publication date: December 1, 2005
    Inventor: Nobuo Takahashi
  • Publication number: 20050241127
    Abstract: A method for manufacturing, by utilizing a punch and a die, a cell driving type actuator wherein a plurality of piezoelectric/electrostrictive elements are arranged in alignment like the teeth of a comb on a base plate. Each cell is formed by closing two adjacent piezoelectric/electrostrictive elements disposed on the base plate with a cover plate positioned at a plane facing the base plate in such a manner that the cell is formed independently from its adjacent cells. The method includes the steps of preparing a plurality of green sheets made of piezoelectric/electrostrictive material, machining slit apertures in all of the green sheets with the punch, and laminating all of the green sheets after positioning them, thus forming comb-like piezoelectric/electrostrictive elements.
    Type: Application
    Filed: June 9, 2005
    Publication date: November 3, 2005
    Applicant: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi
  • Publication number: 20050226479
    Abstract: A memory region for fingerprint images acquired from a sweep type fingerprint sensor is saved.
    Type: Application
    Filed: April 11, 2005
    Publication date: October 13, 2005
    Inventor: Nobuo Takahashi
  • Publication number: 20050200048
    Abstract: An apparatus for valve-gate injection molding producing an annular molded product having a center through-hole has a valve gate with a simplified structure. The apparatus includes a movable mold member having a first center bore extending in an axial direction, a stationary mold member having a second center bore corresponding to the first bore and providing a product cavity forming the annular molded product between the mold members, a nozzle mounted on the stationary mold member and having a resin supply route having an opening communicating with the second bore, a valve pin extending in the resin supply route and movable between a closing position for closing the opening and an opening position for opening the opening, a center pin movably arranged in the first bore and having a tip surface in contact with a tip surface of the valve pin, and a driving mechanism driving the center pin in the axial direction.
    Type: Application
    Filed: March 9, 2005
    Publication date: September 15, 2005
    Inventors: Shuji Fujii, Hitoshi Takeuchi, Nobuo Takahashi
  • Patent number: 6943483
    Abstract: A piezoelectric actuator includes comb teeth-shaped piezoelectric actuators, each comprising plural piezoelectric layers. A side surface of each tooth is fired. Actuators are made by (1) preparing a plurality of piezoelectric material green sheets on which electrode films are formed and forming slits on a first green sheet using a punch and a die, (2) pulling up the first green sheet using a stripper, (3) pulling up a top portion of the punch slightly from the lowest portion of the pulled up first green sheet, (4) forming second slits in a second green sheet by the punch, (5) pulling up the second green sheet jointly with the first green sheet, and (6) pulling up the top portion of the punch slightly from the lowest portion of the pulled up second green sheet, and thereafter laminating green sheets by repeating steps (4) through (6). The layers can thereafter be fired.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: September 13, 2005
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi
  • Patent number: 6933663
    Abstract: A piezoelectric/electrostrictive actuator includes a plurality of piezoelectric/electrostrictive elements arranged in comb teeth-like alignment on a base plate. The actuator is driven by means of dislocation of the piezoelectric/electrostrictive elements. The cell driving type actuator is characterized in that each of the cells is formed independently from adjacent cells by positioning cover plates between two adjacent piezoelectric/electrostrictive elements. Thus, there is provided a piezoelectric/electrostrictive actuator wherein a heating process at a high temperature can be applied and mass production at low cost is possible. The actuator includes cells with slit portions having a width of 60 ?m or less and a high aspect ratio and can be activated with high electric field strength, and great displacement can be obtained with small electric field strength.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: August 23, 2005
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi
  • Publication number: 20050102807
    Abstract: A matrix type piezoelectric/electrostrictive (P/E) actuator includes a plurality of piezoelectric/electrostrictive elements, each including a piezoelectric/electrostrictive body and at least one pair of electrodes formed on a ceramic substrate. The matrix type P/E actuator is activated by the displacement of the piezoelectric/electrostrictive bodies. The piezoelectric/electrostrictive elements are joined to the ceramic substrate as respective unified bodies, and are two-dimensionally arranged independently from each other. The piezoelectric/electrostrictive actuator provides a greater displacement with a lower voltage, a high responsive speed, and a greater generating force, as well as enhancing the mounting ability and the integration. A method for manufacturing such a matrix type P/E actuator is also disclosed.
    Type: Application
    Filed: December 8, 2004
    Publication date: May 19, 2005
    Applicant: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi, Koji Kimura
  • Patent number: 6875404
    Abstract: A micropipette constructed for dispensing sequential, different sample solutions, including a substrate, an inlet port formed in or on the substrate, a cavity into which the sample solutions are poured through the inlet port and which is filled sequentially with the sample solutions, an introduction hole between each inlet port and cavity, an injection port for sequentially expelling the sample solutions formed in communication with each cavity, and a piezoelectric/electrostrictive element provided on at least one wall of the substrate adjacent each cavity.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: April 5, 2005
    Assignee: NGK Insulators, Ltd.
    Inventors: Toshikazu Hirota, Nobuo Takahashi, Yukihasa Takeuchi
  • Patent number: 6864620
    Abstract: A matrix type piezoelectric/electrostrictive (PIE) actuator includes a plurality of piezoelectric/electrostrictive elements, each including a piezoelectric/electrostrictive body and at least one pair of electrodes formed on a ceramic substrate. The matrix type P/E actuator is activated by displacement of the piezoelectric/electrostrictive bodies. The piezoelectric/electrostrictive elements are joined to the ceramic substrate as respective unified bodies, and are two-dimensionally arranged independently from each other. The piezoelectric/electrostrictive actuator provides a greater displacement with a lower voltage, a high responsive speed, and a greater generating force, as well as enhancing the mounting ability and the integration. A method for manufacturing such a matrix type P/E actuator is also disclosed.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: March 8, 2005
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi, Koji Kimura
  • Patent number: 6852545
    Abstract: A micropipette is provided including at least one substrate, an inlet port through which a sample is delivered from the outside, a cavity to be poured and filled with the sample, an introduction hole, and an injection port for expelling the sample are formed on the at least one substrate. The substrate for forming the cavity is made of ceramics, a piezoelectric/electrostrictive element is provided for at least one wall surface of the substrate, and the sample moves as a laminar flow in the cavity. The volume of the cavity is changed by driving the piezoelectric/electrostrictive element to expell a certain amount of the sample in the cavity from the injection port. According to the micropipette, it is possible to form microspots with high accuracy and high speed. According to a dispenser including the micropipette, it is possible to efficiently dispense hundreds to ten thousands of different samples at one time and form microspots. Therefore, productivity is remarkably improved.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: February 8, 2005
    Assignee: NGK Insulators, Ltd.
    Inventors: Toshikazu Hirota, Nobuo Takahashi, Yukihisa Takeuchi
  • Patent number: 6845173
    Abstract: A fingerprint input apparatus is provided that specifies the cause when a failure in fingerprint reading occurs and then notifies a user of the content of the cause and/or the countermeasure against it. The fingerprint input apparatus comprises a fingerprint sensor (1) for reading a fingerprint and then outputting fingerprint image data corresponding to the fingerprint, a fingerprint analyzer (3) for analyzing the quality of a fingerprint image represented by fingerprint image data and creating an evaluation result representing the cause of the quality failure and/or a countermeasure against it when the analysis result indicates a quality failure, and an evaluation result display (2) for displaying the evaluation result.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: January 18, 2005
    Assignee: NEC Corporation
    Inventor: Nobuo Takahashi
  • Publication number: 20040244167
    Abstract: A piezoelectric/electrostrictive film-type actuator has a ceramic base and a piezoelectric/electrostrictive element, which has piezoelectric/electrostrictive films and electrode films and which is disposed on the ceramic base, and is driven in accordance with a dislocation of the piezoelectric/electrostrictive element. The piezoelectric/electrostrictive element is formed such that the piezoelectric/electrostrictive films and the electrode films are alternately laminated so as to construct the uppermost layer and the lowermost layer with the electrode films. Also, the piezoelectric/electrostrictive films have two layers and no pores, containing a different phase formed by a decomposed material thereof, in the boundary sandwiched therebetween. In addition, the upper layer of the two-layered piezoelectric/electrostrictive films is thicker than the lower layer.
    Type: Application
    Filed: July 7, 2004
    Publication date: December 9, 2004
    Applicant: NGK Insulators, Ltd.
    Inventors: Mutsumi Kitagawa, Nobuo Takahashi, Yukihisa Takeuchi
  • Publication number: 20040202554
    Abstract: A micro pump having at least one pump member for conveying a fluid by action of pressure includes a pump unit formed by at least one actuator member for generating a pressure fluctuation and a fluid channel in which the fluid flows. The actuator member is provided with a cell formed by disposing two side walls made of piezoelectric/electrostrictive elements or antiferrodielectric elements on a connecting plate, and covering a surface facing the connecting plate between the side walls with a cover plate. The actuator member selectively forms the fluid channel and generates pressure fluctuation in the fluid channel member due to displacement of the cell caused by expansion/contraction of the side walls. The micro pump is small and thin in size, while attaining increasing fluid ejection amounts, and a high speed in response.
    Type: Application
    Filed: April 30, 2004
    Publication date: October 14, 2004
    Applicant: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi
  • Patent number: 6796637
    Abstract: A piezoelectric/electrostrictive film-type actuator has a ceramic base and a piezoelectric/electrostrictive element, which has piezoelectric/electrostrictive films and electrode films and which is disposed on the ceramic base, and is driven in accordance with a dislocation of the piezoelectric/electrostrictive element. The piezoelectric/electrostrictive element is formed such that the piezoelectric/electrostrictive films and the electrode films are alternately laminated so as to construct the uppermost layer and the lowermost layer with the electrode films. Also, the piezoelectric/electrostrictive films have two layers and no pores, containing a different phase formed by a decomposed material thereof, in the boundary sandwiched therebetween. In addition, the upper layer of the two-layered piezoelectric/electrostrictive films is thicker than the lower layer.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: September 28, 2004
    Assignee: NGK Insulators, Ltd.
    Inventors: Mutsumi Kitagawa, Nobuo Takahashi, Yukihisa Takeuchi
  • Patent number: 6794582
    Abstract: There in provided a circuit board including a substrate on which a plurality of screen-printed patterns are formed. Each of the screen-printed includes at least one of a passive device and an active device. A gap disposed between the plurality of screen-printed patterns is not more than 40 &mgr;m.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: September 21, 2004
    Assignee: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Koji Kimura, Nobuo Takahashi
  • Patent number: 6776960
    Abstract: Disclosed is a method comprising a pretreatment step of forming a poly-L-lysine layer on a surface of a base plate, a sample preparation step of preparing a sample containing a DNA fragment, a dilution step of diluting the concentration of the obtained sample, and a supply step of supplying a diluted sample solution onto the base plate to produce a DNA chip. The sample preparation step includes an amplification step of PCR-amplifying the DNA fragment to prepare a PCR product, a powder formation step of drying the obtained PCR product to form DNA powder, and a mixing step of dissolving the obtained DNA powder in a buffer solution.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: August 17, 2004
    Assignee: NGK Insulators, Ltd.
    Inventors: Toshikazu Hirota, Nobuo Takahashi, Yukihisa Takeuchi, Takao Ohnishi
  • Publication number: 20040141857
    Abstract: A method for manufacturing a micro pump member, in which a plurality of cells formed in a base part are used as pressurizing chambers, and side walls forming the pressurizing chambers are constructed by piezoelectric/electrostrictive elements. The micro pump member is formed by using a punch and die to form slits through green sheets that are laminated to one another.
    Type: Application
    Filed: January 6, 2004
    Publication date: July 22, 2004
    Applicant: NGK Insulators, Ltd.
    Inventors: Yukihisa Takeuchi, Hiroyuki Tsuji, Kazumasa Kitamura, Nobuo Takahashi