Patents by Inventor Takayo Katsuki
Takayo Katsuki 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: 8164178Abstract: A chip-type semiconductor ceramic electronic component including a ceramic body made of a semiconductor ceramic, first external electrodes formed on opposite end surfaces of the ceramic body, and second external electrodes extending to cover surfaces of the first external electrodes and part of side surfaces of the ceramic body. A curvature radius of a corner portion of the ceramic body is R (?m), a maximum thickness of a layer of the first external electrode layer, which is in contact with the ceramic body, measured from the end surface of the ceramic body is y (?m), and a minimum thickness of a layer of the second external electrode, which is in contact with the side surface of the ceramic body, measured from an apex of the corner portion of the ceramic body is x (?m), and 20?R?50, ?0.4 x+0.6?y?0.4 is satisfied when 0.5?x?1.1, and ?0.0076 x+0.16836?y?0.4 is satisfied when 1.1?x?9.0.Type: GrantFiled: July 28, 2010Date of Patent: April 24, 2012Assignee: Murata Manufacturing Co., Ltd.Inventors: Takayo Katsuki, Yoshiaki Abe
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Publication number: 20100283114Abstract: A chip-type semiconductor ceramic electronic component including a ceramic body made of a semiconductor ceramic, first external electrodes formed on opposite end surfaces of the ceramic body, and second external electrodes extending to cover surfaces of the first external electrodes and part of side surfaces of the ceramic body. A curvature radius of a corner portion of the ceramic body is R (?m), a maximum thickness of a layer of the first external electrode layer, which is in contact with the ceramic body, measured from the end surface of the ceramic body is y (?m), and a minimum thickness of a layer of the second external electrode, which is in contact with the side surface of the ceramic body, measured from an apex of the corner portion of the ceramic body is x (?m), and 20?R?50, ?0.4 x+0.6?y?0.4 is satisfied when 0.5?x?1.1, and ?0.0076 x+0.16836?y?0.4 is satisfied when 1.1?x?9.0.Type: ApplicationFiled: July 28, 2010Publication date: November 11, 2010Inventors: Takayo Katsuki, Yoshiaki Abe
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Patent number: 7164341Abstract: A surface-mountable PTC thermistor element includes electrodes disposed on a top surface and a bottom surface of a thermistor element body, in which each of the electrodes is connected with a terminal respectively and each of the terminals is extended downward. An upper terminal is protected from being detached by a reaction force acting against pressing at the time of press-mounting the PTC thermistor element onto a surface of a substrate. A vertical-leg portion of the lower terminal is placed inside the thermistor element body in the radial direction from the outer edge of the thermistor element body. Preferably, the vertical-leg portion of the lower terminal is placed in the vicinity of the center of the thermistor element body.Type: GrantFiled: September 27, 2001Date of Patent: January 16, 2007Assignee: Murata Manufacturing Co., Ltd.Inventors: Takayo Katsuki, Takeo Haga
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Patent number: 6690258Abstract: A surface-mount positive coefficient thermistor includes a plate-like positive coefficient thermistor element, a pair of electrodes on the respective two main surfaces of the positive coefficient thermistor element, a pair of metal terminals each having a cutout at one end region connected to the corresponding electrode, the metal terminals including a metal having a low thermal conductivity, and solders each connecting the end region of the corresponding metal terminal to the outermost layer of the corresponding electrode. The metal terminal is readily and uniformly soldered to the electrode in a short period of time.Type: GrantFiled: March 5, 2002Date of Patent: February 10, 2004Assignee: Murata Manufacturing Co., Ltd.Inventors: Takayo Katsuki, Masanori Nishibori
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Patent number: 6649302Abstract: A temperature sensing device for use in a secondary battery pack includes an NTC element and a current limiter element. The NTC element is disposed at a predetermined position to sense the temperature of a secondary battery incorporated in the secondary battery pack, and one end thereof is electrically connected to a temperature sensing terminal. The current limiter element is connected between the other end of the NTC element and a reference potential terminal.Type: GrantFiled: May 23, 2001Date of Patent: November 18, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Minoru Shimada, Takayo Katsuki
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Publication number: 20020175801Abstract: A surface-mount positive coefficient thermistor includes a plate-like positive coefficient thermistor element, a pair of electrodes on the respective two main surfaces of the positive coefficient thermistor element, a pair of metal terminals each having a cutout at one end region connected to the corresponding electrode, the metal terminals including a metal having a low thermal conductivity, and solders each connecting the end region of the corresponding metal terminal to the outermost layer of the corresponding electrode. The metal terminal is readily and uniformly soldered to the electrode in a short period of time.Type: ApplicationFiled: March 5, 2002Publication date: November 28, 2002Applicant: Murata Manufacturing Co., LtdInventors: Takayo Katsuki, Masanori Nishibori
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Publication number: 20020057186Abstract: A surface-mountable PTC thermistor element includes electrodes disposed on a top surface and a bottom surface of a thermistor element body, in which each of the electrodes is connected with a terminal respectively and each of the terminals is extended downward. An upper terminal is protected from being detached by a reaction force acting against pressing at the time of press-mounting the PTC thermistor element onto a surface of a substrate. A vertical-leg portion of the lower terminal is placed inside the thermistor element body in the radial direction from the outer edge of the thermistor element body. Preferably, the vertical-leg portion of the lower terminal is placed in the vicinity of the center of the thermistor element body.Type: ApplicationFiled: September 27, 2001Publication date: May 16, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Takayo Katsuki, Takeo Haga
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Publication number: 20020004160Abstract: A temperature sensing device for use in a secondary battery pack includes an NTC element and a current limiter element. The NTC element is disposed at a predetermined position to sense the temperature of a secondary battery incorporated in the secondary battery pack, and one end thereof is electrically connected to a temperature sensing terminal. The current limiter element is connected between the other end of the NTC element and a reference potential terminal.Type: ApplicationFiled: May 23, 2001Publication date: January 10, 2002Inventors: Minoru Shimada, Takayo Katsuki
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Patent number: 6188307Abstract: A positive-characteristics thermistor apparatus has an insulating case, positive-characteristics thermistor devices, planar terminals, and spring terminals. Whichever thermistor device has a lower resistance of the two thermistor devices is trimmed to have a higher resistance which is near the resistance of the other thermistor device such that the two thermistor devices have substantially the same resistance (for example, within a difference of ±1 &OHgr;). In other words, a part of an electrode of the thermistor device having a lower resistance is removed with a laser beam.Type: GrantFiled: April 21, 1998Date of Patent: February 13, 2001Assignee: Murata Manufacturing Co., Ltd.Inventors: Takayo Katsuki, Takashi Shikama
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Patent number: 5990779Abstract: A thermistor for surface mounting includes a first conductive terminal member, a case having a top opening, a planar thermistor element having electrodes on mutually opposite main surfaces thereof, and a second conductive terminal member having at one end thereof a planar cover part which is attached to the top part of the case. One end of the first terminal member is positioned inside the case and above its bottom member. The other ends of the first and second terminal members are positioned on the bottom surface of the case.Type: GrantFiled: April 8, 1997Date of Patent: November 23, 1999Assignee: Murata Manufacturing Co., Ltd.Inventors: Takayo Katsuki, Yuichi Takaoka, Kiyofumi Torii, Akira Toba, Osamu Watanabe, Kouichi Tatsuoka, Masaru Nakagawa, Masahiro Yokota, Shinji Omura, Hiroshi Ohta
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Patent number: 5825604Abstract: In one example of a demagnetization (degaussing) circuit, main electrodes of a TRIAC, a first positive temperature characteristic thermistor and a demagnetization coil are connected in series to both ends of an AC supply, and a heat-sensitive switch and a heating resistor are connected in series between an end of the TRIAC on the side of the AC supply and an end of the demagnetization coil on the side of the AC supply. A connecting point between the heat-sensitive switch and the heating resistor is connected to a gate electrode of the TRIAC, and the heat-sensitive switch and the heating resistor are thermally coupled to each other. The disclosed demagnetization circuit does not need a secondary electric circuit such as a relay control circuit and allows easy substrate design, with a small number of components and at low cost.Type: GrantFiled: November 4, 1997Date of Patent: October 20, 1998Assignee: Murata Manufacturing Co., Ltd.Inventors: Yutaka Ikeda, Takayo Katsuki
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Patent number: 5798685Abstract: A positive-characteristics thermistor apparatus has an insulating case, positive-characteristics thermistor devices, planar terminals, and spring terminals. Whichever thermistor device has a lower resistance of the two thermistor devices is trimmed to have a higher resistance which is near the resistance of the other thermistor device such that the two thermistor devices have substantially the same resistance (for example, within a difference of .+-.1.OMEGA.). In other words, a part of an electrode of the thermistor device having a lower resistance is removed with a laser beam.Type: GrantFiled: February 29, 1996Date of Patent: August 25, 1998Assignee: Murata Manufacturing Co., Ltd.Inventors: Takayo Katsuki, Takashi Shikama
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Patent number: 5524792Abstract: Disclosed herein is a cup vendor delivery nozzle comprising a nozzle body of resin etc. having a substantially cylindrical shape, a PTC element for heating an inner surface of the nozzle body, and a metal body for transferring heat from the PTC element to the interior of the nozzle body.Type: GrantFiled: March 30, 1995Date of Patent: June 11, 1996Assignee: Murata Manufacturing Co., Ltd.Inventors: Asami Wakabayashi, Katsuyuki Uchida, Tomoaki Tadokoro, Takayo Katsuki
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Patent number: 5488348Abstract: A PTC thermistor including ceramic body having a positive temperature coefficient of resistivity, a pair of electrode layers provided on both major surfaces of the ceramic body so as to be opposed to each other with the ceramic body interposed therebetween, a ceramic reinforcing plate provided on at least one of the major surfaces of the ceramic body, and an output electrode having a connecting portion for making electrical connection with the electrode layer on an inner major surface of the ceramic reinforcing plate and extending to an outer major surface of the reinforcing plate from the connecting portion.Type: GrantFiled: March 8, 1994Date of Patent: January 30, 1996Assignee: Murata Manufacturing Co., Ltd.Inventors: Shyoji Asida, Haruo Takahata, Takayo Katsuki
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Patent number: 5210516Abstract: A PTC thermistor has its substrate entirely coated with an insulating glass material except for the area where a silver electrode is formed. Such a thermistor may be produced by coating a substrate with an insulating glass material, forming a silver layer on the coated substrate and fusing the silver layer with a part of the glass material so as to form an electrode adhering to the substrate. An underelectrode may be provided between the substrate and such an electrode. A resistor is formed by encasing such a PTC thermistor with a pair of spring terminals for supporting the thermistor therebetween.Type: GrantFiled: February 22, 1991Date of Patent: May 11, 1993Assignee: Murata Manufacturing Co., Ltd.Inventors: Takashi Shikama, Yuichi Takaoka, Takayo Katsuki, Tomoaki Tadokoro
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Patent number: 5153555Abstract: There is disclosed an electronic device comprising a plate-shaped electronic element having electrode films. The electronic element is elastically supported by spring members in an electrically insulating case so as to be respectively in contact with the electrode films. Each spring member includes supporting plates opposing to the electrode films and spring pieces for being respectively in contact with the electrode films at contact points thereof. Each spring piece is formed integrally with the supporting plate so as to be extended with a curvature toward the electrode film from one end of the supporting plate in the longitudinal direction thereof to the contact point, to be folded by a predetermined angle at the contact point, and to be further extended toward the supporting plate from the contact point without contact with the supporting plate.Type: GrantFiled: November 28, 1990Date of Patent: October 6, 1992Assignee: Murata Manufacturing Co., Ltd.Inventors: Hisao Enomoto, Takayo Katsuki