Patents by Inventor Kazunari Takahashi
Kazunari 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).
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Publication number: 20160123091Abstract: A threaded joint for an oil country tubular goods includes pins each of which occupies a pipe end portion of a steel pipe for an oil country tubular goods, and includes an externally-threaded portion, a nose extending toward a pipe end side from the externally-threaded portion, and a shoulder forming a distal end of the nose; and a box including internally-threaded portions each forming a threaded portion by being threadedly joined with the externally-threaded portion, and shoulders brought into contact with the shoulders of the pins, wherein the pins and the box being joined to each other by the threaded joining so that portions between the threaded portions and the shoulders are brought into metal-to-metal contact with each other to thereby form seal portions at the contact portions, and the shoulders of the pins and the shoulders of the box forming shoulder faces are brought into contact with each other at the time of make-up of the threaded joint, and a ratio of a chamfer length of pin thread to a threadType: ApplicationFiled: June 9, 2014Publication date: May 5, 2016Inventors: Takamasa Kawai, Kazunari Takahashi, Hiroshi Chikatsune, Masaki Yoshikawa, Jun Takano, Takuya Nagahama, Masateru Ueta
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Publication number: 20160071667Abstract: A click mechanism includes a first magnetic body having a first protrusion, a second magnetic body having a second protrusion, and a magnet configured to magnetize at least one of the first magnetic body and the second magnetic body. The click mechanism is configured to, in accordance with input operation, move at least one of the first magnetic body and the second magnetic body relative to the other, and generate click sensation corresponding to the input operation using magnetic attractive force generated between the first protrusion and the second protrusion. The second magnetic body further has a third protrusion configured to generate magnetic attractive force between itself and the first protrusion and differing in shape from the second protrusion.Type: ApplicationFiled: September 9, 2015Publication date: March 10, 2016Inventors: Kazunari Takahashi, Rei Namiki, Ken Kosaka
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Publication number: 20150377391Abstract: A threaded joint for pipes including a pin and a box, characterized in that the relationship 0.05 degrees??sb??sp?2.0 degrees is satisfied, where ?sb is an angle of an insertion surface of the female thread on the box side relative to a plane perpendicular to an axis of pipe, and ?sp is an angle of an insertion surface of the male thread, which faces the insertion surface of the female thread, on the pin side relative to the plane perpendicular to the axis of pipe.Type: ApplicationFiled: December 18, 2013Publication date: December 31, 2015Inventors: Takuya NAGAHAMA, Hiroshi CHIKATSUNE, Kazunari TAKAHASHI, Masaki YOSHIKAWA, Jun TAKANO, Masateru UETA, Takamasa KAWAI
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Patent number: 9194190Abstract: A threaded joint for a pipe is disclosed in which scalability, compression resistance, and galling resistance are enhanced. The threaded joint includes a pin nose outer peripheral surface that forms an outward convex curve in an axial cross-sectional view; the convex curve is such that a composite R curve, in which a plurality of outward convex arcs having different radiuses of curvature are connected in sequence to a generating line of a cylindrical portion next to a male member, is curved such that the radiuses of curvature increase with distance from the male member and tangents on connection points of the arcs are aligned with those of corresponding arcs connected thereto; and the inner peripheral surface of a box component facing the pin nose is a tapered surface that interferes with the pin nose outer peripheral surface when connected to a pin component.Type: GrantFiled: June 22, 2011Date of Patent: November 24, 2015Assignee: JFE STEEL CORPORATIONInventors: Osamu Sonobe, Takuya Nagahama, Masaki Yoshikawa, Jun Takano, Takamasa Kawai, Kazunari Takahashi
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Publication number: 20150198270Abstract: A threaded joint for pipes is provided in which a box-side lip length L, which is the axial distance between a pin-nose-end corresponding point P of the box component 1 and a load surface 18b of a lip-side internal thread ridge 50 closest to the pin-nose-end corresponding point P, is 300 or more times as long as an insertion surface interval ?, which is the axial interval between an insertion surface 19b of an internal thread ridge at a position two or more ridges backwards from the lip-side internal thread ridge 50 and an insertion surface 19a of an external thread ridge facing the insertion surface 19b when tightened, that is, L?300×?.Type: ApplicationFiled: July 1, 2013Publication date: July 16, 2015Applicant: JFE STEEL CORPORATIONInventors: Takuya Nagahama, Kazunari Takahashi, Hiroshi Chikatsune, Masaki Yoshikawa, Jun Takano, Takamasa Kawai, Masateru Ueta
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Patent number: 8991875Abstract: Provided is a threaded joint for steel pipes having high sealability even under a bending load. In the threaded joint, when a pin 3 and a box 1 are threadedly connected with each other, the outer peripheral face of a nose 8 of the pin and the inner peripheral face of a nose of the box are in metal-to-metal contact with each other at a contact portion and the contact portion serves as a seal portion 20. A threaded portion, at which the externally threaded portion 7 and the internally threaded portion 5 are threadedly connected with each other, has a negative load flank angle ?, shoulder portions 12 and 14 have a negative torque shoulder angle ?, and the ratio L/d0 of a length L of the nose and a pipe outside diameter d0 is equal to or higher than 0.08.Type: GrantFiled: February 24, 2012Date of Patent: March 31, 2015Assignee: JFE Steel CorporationInventors: Masaki Yoshikawa, Takuya Nagahama, Hiroshi Chikatsune, Jun Takano, Takamasa Kawai, Kazunari Takahashi, Masateru Ueta, Osamu Sonobe
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Publication number: 20150061287Abstract: In the threaded joint for pipes, a coating having a Vickers hardness greater than or equal to 310 is formed on a threaded portion of the box and an inner face of the box corresponding to a seal portion. The seal interference amount ratio ?/D of the seal portion in a pipe circumferential direction is greater than or equal to 0.002, where D is a seal diameter defined as an outside diameter of the pin at a seal point that is a point on the outer peripheral face of the nose of the pin at which the outer peripheral face first comes into contact with the inner peripheral face of the nose of the box and ? is an interference amount defined as an amount by which the outside diameter at the seal point is reduced by the box when the pin and the box are threadedly connected with each other.Type: ApplicationFiled: October 16, 2012Publication date: March 5, 2015Applicant: JFE Steel CorporationInventors: Masaki Yoshikawa, Takuya Nagahama, Hiroshi Chikatsune, Jun Takano, Takamasa Kawai, Masateru Ueta, Kazunari Takahashi, Nobuhiko Morioka
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Patent number: 8920330Abstract: A body compressor 1 is provided with a fluid bag 2, a band-like body 3 and a metal clip 4, wherein a fixed part 42 of the metal clip 4 is attached such that it is positioned above the outer surface of a skin pinching prevention tag part 5, and the skin pinching prevention tag part 5 has a reinforcing member 6 which allows the bending rigidity of a center-side part 51 and an intermediate part 52 to be higher than that of a front-side part 53.Type: GrantFiled: April 20, 2010Date of Patent: December 30, 2014Assignee: Citizen Systems Japan Co., Ltd.Inventors: Takashi Nakanishi, Kazunari Takahashi, Kenichi Matsumoto
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Publication number: 20140116560Abstract: Radial seal type threaded joints for steel pipes have still room for improvement in ensuring sealability in terms of the rigidity of the pin nose. Specifically, the outer circumferential surface of the nose of the pin has an outward convex curved shape, and the sealing surface of the box has a tapered shape; and the cross-sectional area of the pin at a seal point that is a portion on the outer circumferential surface of the nose of the pin, the portion first coming into contact with the sealing surface of the box when threaded-joined, is 35% or more of the cross-sectional area of an original pipe portion corresponding to an unprocessed portion.Type: ApplicationFiled: February 24, 2012Publication date: May 1, 2014Applicant: JFE STEEL CORPORATIONInventors: Takamasa Kawai, Kazunari Takahashi, Hiroshi Chikatsune, Masaki Yoshikawa, Jun Takano, Takuya Nagahama, Masateru Ueta, Osamu Sonobe
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Publication number: 20140049045Abstract: Provided is a threaded joint for steel pipes having high sealability even under a bending load. In the threaded joint, when a pin 3 and a box 1 are threadedly connected with each other, the outer peripheral face of a nose 8 of the pin and the inner peripheral face of a nose of the box are in metal-to-metal contact with each other at a contact portion and the contact portion serves as a seal portion 20. A threaded portion, at which the externally threaded portion 7 and the internally threaded portion 5 are threadedly connected with each other, has a negative load flank angle ?, shoulder portions 12 and 14 have a negative torque shoulder angle ?, and the ratio L/d0 of a length L of the nose and a pipe outside diameter d0 is equal to or higher than 0.08.Type: ApplicationFiled: February 24, 2012Publication date: February 20, 2014Applicant: JFE Steel CorporationInventors: Masaki Yoshikawa, Takuya Nagahama, Hiroshi Chikatsune, Jun Takano, Takamasa Kawai, Kazunari Takahashi, Masateru Ueta, Osamu Sonobe
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Publication number: 20130181442Abstract: Provided is a threaded joint for a pipe in which scalability, compression resistance, and galling resistance are enhanced. Specifically, a pin nose outer peripheral surface forms an outward convex curve in an axial cross-sectional view; the convex curve is such that a composite R curve, in which a plurality of outward convex arcs having different radiuses of curvature are connected in sequence to a generating line of a cylindrical portion next to a male member, is curved such that the radiuses of curvature increase with distance from the male member and tangents on connection points of the arcs are aligned with those of corresponding arcs connected thereto; and the inner peripheral surface of a box component facing the pin nose is a tapered surface that interferes with the pin nose outer peripheral surface when connected to a pin component.Type: ApplicationFiled: June 22, 2011Publication date: July 18, 2013Applicant: JFE STEEL CORPORATIONInventors: Osamu Sonobe, Takuya Nagahama, Masaki Yoshikawa, Jun Takano, Takamasa Kawai, Kazunari Takahashi
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Publication number: 20100268100Abstract: A body compressor 1 is provided with a fluid bag 2, a band-like body 3 and a metal clip 4, wherein a fixed part 42 of the metal clip 4 is attached such that it is positioned above the outer surface of a skin pinching prevention tag part 5, and the skin pinching prevention tag part 5 has a reinforcing member 6 which allows the bending rigidity of a center-side part 51 and an intermediate part 52 to be higher than that of a front-side part 53.Type: ApplicationFiled: April 20, 2010Publication date: October 21, 2010Applicant: CITIZEN SYSTEMS JAPAN CO., LTD.Inventors: Takashi Nakanishi, Kazunari Takahashi, Kenichi Matsumoto
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Publication number: 20090287096Abstract: In a blood pressure meter (1) including: a body which is connected through a tube with a cuff and which has a display section (14) which displays a blood pressure value determined by a control section (6) based on a variation in a pressure measurement value by a pressure sensor (5) in the cuff; a spherical hand pump (3) which is attached to the body (2) and which supplies air by a compressing operation to the cuff to inflate the cuff; and a grasp section (16) which is extended from the body (2) along the outer surface of the pump (3) in the direction of the axis of the hand pump (3) and which is capable of being grasped with the pump (3), the display section (14) being placed at the body (2) so that a blood pressure value is visible from a direction substantially normal to the axis of the pump (3), the center line in the width direction of the grasp section (16) is placed at a position at 45° about the axis line of the pump (3) relative to the display (14).Type: ApplicationFiled: July 5, 2006Publication date: November 19, 2009Applicant: CITIZEN HOLDINGS CO., LTD.Inventors: Kazunari Takahashi, Takako Suzuki
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Publication number: 20080118747Abstract: [Problem] To provide a process for producing a permanent magnet for use in an automotive IPM motor, which excels in all of corrosion resistance, abrasion resistance, and impact resistance. [Means for Resolution] The production process characterized in that it comprises forming on the surface of an R—Fe—B based permanent magnet a 3 to 15 ?m thick Ni film as a first layer by electroplating method, followed by a 3 to 15 ?m thick Cu or Sn film as a second layer by electroplating method, and a 4 to 7 ?m thick Ni—P alloy film as a third layer by electroless plating method, provided that the third layer has a Vicker's hardness of 2.5 to 4.5 with respect to the Vicker's hardness of the Cu or Sn electroplated film provided as the second layer taken as 1.Type: ApplicationFiled: November 21, 2005Publication date: May 22, 2008Inventors: Toshiyasu Komatsu, Yasutaka Shintani, Kazunari Takahashi, Akira Kabasawa, Hidenori Okada, Yukimitsu Miyao, Yuji Kaneko
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Patent number: 7164217Abstract: An electric motor lead frame for connecting motor coils of the same phase is formed integrally by a linear conductor. The linear conductor includes at least a single conducting wire and has terminal portions formed by bending for connection with winding ends of motor coils.Type: GrantFiled: February 23, 2006Date of Patent: January 16, 2007Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Akira Kabasawa, Kazunari Takahashi, Akihiro Okamura
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Publication number: 20060138884Abstract: An electric motor lead frame for connecting motor coils of the same phase is formed integrally by a linear conductor. The linear conductor includes at least a single conducting wire and has terminal portions formed by bending for connection with winding ends of motor coils.Type: ApplicationFiled: February 23, 2006Publication date: June 29, 2006Inventors: Akira Kabasawa, Kazunari Takahashi, Akihiro Okamura
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Patent number: 7045920Abstract: An interconnection assembly has phase parts for U phase, V phase and W phase. The phase parts each are of a plurality of interconnection assembly parts that are connected in the form of a ring and include a conductor section to which a motor coil wire is connected, the conductor section being formed by stripping fluororesin insulation at a predetermined position, and the phase parts are partially fixedly bundled.Type: GrantFiled: August 19, 2003Date of Patent: May 16, 2006Assignees: Hitachi Cable, Ltd., Honda Giken Kogyo Kabushiki KaishaInventors: Katsuaki Ohuchi, Katsuo Endo, Hideo Matsuo, Akira Kabasawa, Akihiro Okamura, Kazunari Takahashi
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Patent number: 7034419Abstract: An electric motor lead frame for connecting motor coils of the same phase is formed integrally by a linear conductor. The linear conductor includes at least a single conducting wire and has terminal portions formed by bending for connection with winding ends of motor coils.Type: GrantFiled: August 29, 2003Date of Patent: April 25, 2006Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Akira Kabasawa, Kazunari Takahashi, Akihiro Okamura
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Patent number: 6954045Abstract: There are provided as drive sources an engine 2, a front motor 3 provided on a front wheels 8 side of the vehicle and a rear motor 4 provided on a rear wheels 9 side of the vehicle, and in executing a regeneration of deceleration energy when braking, a regeneration capacity of the front motor 3 and a regeneration capacity of the rear motor 4 are calculated, respectively, so that the regeneration is executed with either of these motors 3, 4 which can provide a larger regeneration capacity.Type: GrantFiled: November 20, 2003Date of Patent: October 11, 2005Assignee: Honda Motor Co.Inventors: Ryo Nishikawa, Yusuke Tatara, Akihiro Yamamoto, Kazunari Takahashi
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Patent number: 6862205Abstract: The semiconductor memory device includes: a memory cell including a capacitor having a charge storage node and a first MIS transistor and a second MIS transistor each having a source connected to the charge storage node; a first word line and a first bit line respectively connected to the gate and the drain of the first MIS transistor; a second word line and a second bit line respectively connected to the gate and the drain of the second MIS transistor; and a timer circuit for generating a periodic signal having a predetermined period. The first word line or the second word line is activated in response to the periodic signal.Type: GrantFiled: February 26, 2003Date of Patent: March 1, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masashi Agata, Kazunari Takahashi