Patents by Inventor Kazumasa Yoshida
Kazumasa Yoshida 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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Patent number: 11062850Abstract: A film capacitor includes a capacitor element, a first bus bar, and a second bus bar. The first bus bar includes a first electrode connecting part connected to the first electrode of the capacitor element at one end and a first connection terminal at another end. The second bus bar includes a second electrode connecting part connected to the second electrode of the capacitor element at one end and a second connection terminal at another end. The first bus bar includes a branch part that is branched from a position closer to the first electrode connecting part than the first connection terminal and extends toward the second electrode along a peripheral surface of the capacitor element. The second bus bar includes an overlapping part that overlaps at least a part of the branch part. The overlapping part is along the peripheral surface of the capacitor element.Type: GrantFiled: August 22, 2019Date of Patent: July 13, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Shozo Hiramoto, Hiroki Takeoka, Kazumasa Yoshida, Daisuke Mitani
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Publication number: 20190378658Abstract: A film capacitor includes a capacitor element, a first bus bar, and a second bus bar. The first bus bar includes a first electrode connecting part connected to the first electrode of the capacitor element at one end and a first connection terminal at another end. The second bus bar includes a second electrode connecting part connected to the second electrode of the capacitor element at one end and a second connection terminal at another end. The first bus bar includes a branch part that is branched from a position closer to the first electrode connecting part than the first connection terminal and extends toward the second electrode along a peripheral surface of the capacitor element. The second bus bar includes an overlapping part that overlaps at least a part of the branch part. The overlapping part is along the peripheral surface of the capacitor element.Type: ApplicationFiled: August 22, 2019Publication date: December 12, 2019Inventors: SHOZO HIRAMOTO, HIROKI TAKEOKA, KAZUMASA YOSHIDA, DAISUKE MITANI
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Patent number: 10355530Abstract: A control circuit controls a plurality of conversion switching elements by first drive signals and a plurality of adjustment switching elements by second drive signals. The control circuit is configured to adjust a phase difference which is a delay of the phase of each of the second drive signals to the phase of each of the first drive signals to a set value within a prescribed range to adjust the magnitude of output power. The prescribed range includes at least one of a range of 270 degrees to 360 degrees and a range of 90 degrees to 180 degrees.Type: GrantFiled: March 11, 2016Date of Patent: July 16, 2019Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yusuke Tanji, Hideki Tamura, Kazumasa Yoshida
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Patent number: 10039187Abstract: A flexible substrate having a branch structure in the related art has problems in that: adhesive strength after two bodies are folded and fixed at a bonding region decreases due to an unfolding and opening force at a curve portion and ends of the bonded portions are peeled off and generate gaps; and in a soldering process of the two bodies, the electrodes of one body soldered first are displaced due to reheating in soldering the other body secondly and deteriorate in soldered connection. The present invention provides a new flexible substrate having a branch structure, including first and second bodies joined together, and having a structure in which one of the bodies can be folded back in a longitudinal direction of the whole flexible substrate. Tip ends of the two bodies are provided with multiple electrodes, and are connected by soldering to approximately corresponding positions on both surfaces of an end portion of a printed substrate concerned.Type: GrantFiled: March 17, 2016Date of Patent: July 31, 2018Assignee: NTT ELECTRONICS CORPORATIONInventors: Kazumasa Yoshida, Toshiyuki Ozawa, Teruaki Sato, Atsushi Tomita, Yosuke Takeuchi, Shinji Mino, Yusuke Nasu
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Publication number: 20180124920Abstract: A flexible substrate having a branch structure in the related art has problems in that: adhesive strength after two bodies are folded and fixed at a bonding region decreases due to an unfolding and opening force at a curve portion and ends of the bonded portions are peeled off and generate gaps; and in a soldering process of the two bodies, the electrodes of one body soldered first are displaced due to reheating in soldering the other body secondly and deteriorate in soldered connection. The present invention provides a new flexible substrate having a branch structure, including first and second bodies joined together, and having a structure in which one of the bodies can be folded back in a longitudinal direction of the whole flexible substrate. Tip ends of the two bodies are provided with multiple electrodes, and are connected by soldering to approximately corresponding positions on both surfaces of an end portion of a printed substrate concerned.Type: ApplicationFiled: March 17, 2016Publication date: May 3, 2018Inventors: Kazumasa YOSHIDA, Toshiyuki OZAWA, Teruaki SATO, Atsushi TOMITA, Yosuke TAKEUCHI, Shinji MINO, Yusuke NASU
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Publication number: 20180034323Abstract: A control circuit controls a plurality of conversion switching elements by first drive signals and a plurality of adjustment switching elements by second drive signals. The control circuit is configured to adjust a phase difference which is a delay of the phase of each of the second drive signals to the phase of each of the first drive signals to a set value within a prescribed range to adjust the magnitude of output power. The prescribed range includes at least one of a range of 270 degrees to 360 degrees and a range of 90 degrees to 180 degrees.Type: ApplicationFiled: March 11, 2016Publication date: February 1, 2018Inventors: Yusuke TANJI, Hideki TAMURA, Kazumasa YOSHIDA
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Patent number: 8974739Abstract: An improved method for producing an expanded polytetrafluoroethylene (PTFE) porous film or tape supporting catalyst particles. The method for producing an expanded PTFE porous film or tape supporting catalyst particles according to the invention comprises a step of preparing tape-like porous PTFE, a step of impregnating the tape-like porous PTFE with a solution or dispersion of catalyst particles, a step of substantially removing the solvent or dispersing medium, and a step of further stretching the tape-like porous PTFE containing the catalyst particles in the machine direction (MD) and/or the transverse direction (TD).Type: GrantFiled: March 18, 2010Date of Patent: March 10, 2015Assignee: W. L. Gore & Associates, Co., Ltd.Inventor: Kazumasa Yoshida
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Publication number: 20120164035Abstract: An improved method for producing an expanded polytetrafluoroethylene (PTFE) porous film or tape supporting catalyst particles. The method for producing an expanded PTFE porous film or tape supporting catalyst particles according to the invention comprises a step of preparing tape-like porous PTFE, a step of impregnating the tape-like porous PTFE with a solution or dispersion of catalyst particles, a step of substantially removing the solvent or dispersing medium, and a step of further stretching the tape-like porous PTFE containing the catalyst particles in the machine direction (MD) and/or the transverse direction (TD).Type: ApplicationFiled: March 18, 2010Publication date: June 28, 2012Inventor: Kazumasa Yoshida
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Patent number: 8120235Abstract: A spark plug including a center electrode and a ground electrode. A center electrode noble metal tip is joined to a leading end portion of a center electrode, and a ground electrode noble metal tip is joined to a center-electrode-side side surface of the ground electrode. A distal end portion of the ground electrode noble metal tip protrudes from a distal-end surface of the ground electrode by 0.1 mm to 1.5 mm. A center-electrode-side side surface of the ground electrode noble metal tip projects from a center-electrode-side side surface by 0.15 mm to 0.6 mm. The ground electrode includes chamfered portions. Thickness lengths and widthwise lengths of the respective chamfered portions achieved within a cross section perpendicular to a center axis of the ground electrode are set to 0.2 mm or more.Type: GrantFiled: November 20, 2008Date of Patent: February 21, 2012Assignee: NGK Spark Plug Co., Ltd.Inventors: Kenji Nunome, Hiroaki Kuki, Hiroyuki Kameda, Kazumasa Yoshida
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Patent number: 8072125Abstract: A spark plug 100 comprised of a metal shell 1, an insulator 2, a center electrode 3 and a ground electrode 4. A rear-end face of the ground electrode 4 is welded to a front-end face of the metal shell 1, and a bent portion 5 located at the intermediated position in the longitudinal direction is bent toward the center of the spark plug 100. The ground electrode 4 assumes a circular-shape with a diameter of 2 mm or less whereby an inflow of an air-fuel mixture is not disturbed even when the air-fuel mixture directly flows into a back face of the ground electrode 4. The ground electrode 4 is comprised of an outer layer 4A made of a nickel alloy and an inner layer 4B made of pure copper with an excellent thermal conductivity, in which a ratio of a cross-sectional area of the inner layer 4B to the entire cross-sectional area of the ground electrode 4 is 10% or more to 35% or less.Type: GrantFiled: March 19, 2007Date of Patent: December 6, 2011Assignee: NGK Spark Plug Co., Ltd.Inventors: Kazuyoshi Torii, Kazumasa Yoshida, Wataru Matsutani
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Patent number: 7892468Abstract: A slit yarn wherein both side parts of the slit yarn are folded one or more times, and the folded width is substantially uniform along the direction of length of the yarn. In this slit yarn, when the width is measured at 20 or more points at intervals of 0.5 m, and the fluctuation coefficient X shown in the following Equation (1) is calculated on the basis of the average value W(avg) and the standard deviation W(?), this X is (for example) approximately 4% or less. Furthermore, in the slit yarn of the present invention, the abovementioned folded parts are ordinarily shape-set.Type: GrantFiled: November 18, 2009Date of Patent: February 22, 2011Assignee: Japan Gore-Tex Inc.Inventor: Kazumasa Yoshida
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Patent number: 7839064Abstract: A spark plug including: a center electrode as defined herein; a substantially cylindrical insulator as defined herein; a cylindrical metal shell as defined herein; and a ground electrode as defined herein, wherein a spark discharge gap is provided between the leading end portion of the center electrode and the leading end portion of the ground electrode, and the ground electrode has a bulging curved face on a side opposite to a side in which the center electrode is provided, and a maximum of width of the ground electrode within a range of ±1 mm from a center point of the spark discharge gap in the axial direction, as viewed in a direction where the center electrode and the ground electrode overlap, is 105% or less of a width of an ordinary portion having a substantially constant width.Type: GrantFiled: March 14, 2007Date of Patent: November 23, 2010Assignee: NGK Spark Plug Co., Ltd.Inventors: Kazumasa Yoshida, Kazuyoshi Torii, Wataru Matsutani
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Patent number: 7821186Abstract: A spark plug includes an outer electrode including an outer electrode tip of which a distal end surface is spaced from an outer peripheral surface of a leading end portion of a center electrode to define a spark discharge gap. A protruding insulator portion of a cylindrical insulator protrudes at least 1.0 mm from a leading end surface of a cylindrical metal shell. A protruding center electrode portion of the center electrode protrudes at least 3.5 mm from the leading end surface of the cylindrical metal shell. A relationship (?1+?2)/2?75 degrees is satisfied where the angle ?1 is defined as a central angle (degrees) of a first circular sector having a point B1 as a center thereof, and the angle ?2 is an average value (degrees) of the central angles of two second circular sectors having the point B1 as a center thereof.Type: GrantFiled: December 19, 2008Date of Patent: October 26, 2010Assignee: NGK Spark Plug Co., Ltd.Inventors: Hiroyuki Kameda, Katsutoshi Nakayama, Satoshi Nagasawa, Kazumasa Yoshida
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Publication number: 20100264803Abstract: A spark plug including a center electrode and a ground electrode. A center electrode noble metal tip is joined to a leading end portion of a center electrode, and a ground electrode noble metal tip is joined to a center-electrode-side side surface of the ground electrode. A distal end portion of the ground electrode noble metal tip protrudes from a distal-end surface of the ground electrode by 0.1 mm to 1.5 mm. A center-electrode-side side surface of the ground electrode noble metal tip projects from a center-electrode-side side surface by 0.15 mm to 0.6 mm. The ground electrode includes chamfered portions. Thickness lengths and widthwise lengths of the respective chamfered portions achieved within a cross section perpendicular to a center axis of the ground electrode are set to 0.2 mm or more.Type: ApplicationFiled: November 20, 2008Publication date: October 21, 2010Applicant: NGK SPARK PLUG CO., LTD.Inventors: Kenji Nunome, Hiroaki Kuki, Hiroyuki Kameda, Kazumasa Yoshida
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Patent number: 7714489Abstract: A spark plug comprising: a center electrode extending in a direction of an axis of said spark plug; a cylindrical insulator which has a shaft hole, and which holds said center electrode in said shaft hole in a state where a tip end of said center electrode is projected from a tip end face of said insulator; a metal shell which holds said insulator; and a ground electrode in which one end is joined to a tip end face of said metal shell, and which extends from said one end toward another end, wherein said ground electrode has an inner side face which faces said center electrode, and an outer side face which is a back face with respect to said inner side face, said outer side face is formed as an arcuately curved face when viewed from a side of said another end in an extending direction of said ground electrode, and a columnar noble metal tip is joined to said inner side face.Type: GrantFiled: October 11, 2006Date of Patent: May 11, 2010Assignee: NGK Spark Plug Co., Ltd.Inventors: Kazuyoshi Torii, Kazumasa Yoshida, Wataru Matsutani
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Publication number: 20100102480Abstract: A slit yarn wherein both side parts of the slit yarn are folded one or more times, and the folded width is substantially uniform along the direction of length of the yarn. In this slit yarn, when the width is measured at 20 or more points at intervals of 0.5 m, and the fluctuation coefficient X shown in the following Equation (1) is calculated on the basis of the average value W(avg) and the standard deviation W(?), this X is (for example) approximately 4% or less. Furthermore, in the slit yarn of the present invention, the abovementioned folded parts are ordinarily shape-set.Type: ApplicationFiled: November 18, 2009Publication date: April 29, 2010Inventor: Kazumasa Yoshida
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Publication number: 20090160305Abstract: A spark plug includes an outer electrode including an outer electrode tip of which a distal end surface is spaced from an outer peripheral surface of a leading end portion of a center electrode to define a spark discharge gap. A protruding insulator portion of a cylindrical insulator protrudes at least 1.0 mm from a leading end surface of a cylindrical metal shell. A protruding center electrode portion of the center electrode protrudes at least 3.5 mm from the leading end surface of the cylindrical metal shell. A relationship (?1+?2)/2?75 degrees is satisfied where the angle ?1 is defined as a central angle (degrees) of a first circular sector having a point B1 as a center thereof, and the angle ?2 is an average value (degrees) of the central angles of two second circular sectors having the point B1 as a center thereof.Type: ApplicationFiled: December 19, 2008Publication date: June 25, 2009Inventors: Hiroyuki KAMEDA, Katsutoshi Nakayama, Satoshi Nagasawa, Kazumasa Yoshida
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Publication number: 20070216277Abstract: A spark plug including: a center electrode as defined herein; a substantially cylindrical insulator as defined herein; a cylindrical metal shell as defined herein; and a ground electrode as defined herein, wherein a spark discharge gap is provided between the leading end portion of the center electrode and the leading end portion of the ground electrode, and the ground electrode has a bulging curved face on a side opposite to a side in which the center electrode is provided, and a maximum of width of the ground electrode within a range of ±1 mm from a center point of the spark discharge gap in the axial direction, as viewed in a direction where the center electrode and the ground electrode overlap, is 105% or less of a width of an ordinary portion having a substantially constant width.Type: ApplicationFiled: March 14, 2007Publication date: September 20, 2007Applicant: NGK SPARK PLUG CO., LTD.Inventors: Kazumasa Yoshida, Kazuyoshi Torii, Wataru Matsutani
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Publication number: 20070216275Abstract: A spark plug 100 comprised of a metal shell 1, an insulator 2, a center electrode 3 and a ground electrode 4. A rear-end face of the ground electrode 4 is welded to a front-end face of the metal shell 1, and a bent portion 5 located at the intermediated position in the longitudinal direction is bent toward the center of the spark plug 100. The ground electrode 4 assumes a circular-shape with a diameter of 2 mm or less whereby an inflow of an air-fuel mixture is not disturbed even when the air-fuel mixture directly flows into a back face of the ground electrode 4. The ground electrode 4 is comprised of an outer layer 4A made of a nickel alloy and an inner layer 4B made of pure copper with an excellent thermal conductivity, in which a ratio of a cross-sectional area of the inner layer 4B to the entire cross-sectional area of the ground electrode 4 is 10% or more to 35% or less.Type: ApplicationFiled: March 19, 2007Publication date: September 20, 2007Inventors: Kazuyoshi Torii, Kazumasa Yoshida, Wataru Matsutani
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Publication number: 20070080618Abstract: A spark plug comprising: a center electrode extending in a direction of an axis of said spark plug; a cylindrical insulator which has a shaft hole, and which holds said center electrode in said shaft hole in a state where a tip end of said center electrode is projected from a tip end face of said insulator; a metal shell which holds said insulator; and a ground electrode in which one end is joined to a tip end face of said metal shell, and which extends from said one end toward another end, wherein said ground electrode has an inner side face which faces said center electrode, and an outer side face which is a back face with respect to said inner side face, said outer side face is formed as an arcuately curved face when viewed from a side of said another end in an extending direction of said ground electrode, and a columnar noble metal tip is joined to said inner side face.Type: ApplicationFiled: October 11, 2006Publication date: April 12, 2007Inventors: Kazuyoshi Torii, Kazumasa Yoshida, Wataru Matsutani