Patents by Inventor Hiroyuki Kishishita

Hiroyuki Kishishita 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).

  • Publication number: 20190237280
    Abstract: A rotary encoder includes a shaft and an encoder mechanism that holds the shaft in a rotatably inserted state and detects a rotation direction and a rotation angle of the shaft. The encoder mechanism includes a substrate that rotatably holds the shaft, an insulator portion and a resistor portion provided on one surface of the substrate and alternately provided in the rotation direction of the shaft, a rotor attached to the shaft so as to be integrally rotatable with the shaft, and a slider that is attached to the rotor and alternately slidably contacts the insulator portion and the resistor portion by rotation of the shaft. The insulator portion includes a base material made of a resin, spherical silica, and a fluororesin filler.
    Type: Application
    Filed: April 12, 2019
    Publication date: August 1, 2019
    Inventors: Hiroshi MARUSAWA, Yoshiaki NOMURA, Hiroyuki KISHISHITA, Masakazu MURATA
  • Publication number: 20190035576
    Abstract: A rotary electronic component includes a base member, a shaft attached to the base member so as to be rotatable around an axis, and a regulating member that regulates a rotation angle of the shaft. The shaft includes a flange section including a projecting sections and recessed sections alternately disposed in a circumferential direction. The regulating member includes a contact member in contact with the projecting sections and the recessed sections of the flange section of the shaft, and a biasing member that biases the contact member radially inwardly toward the shaft.
    Type: Application
    Filed: September 27, 2018
    Publication date: January 31, 2019
    Inventors: Shogo TOKOI, Sachie OSAKATANI, Toshiki NISHIWAKI, Osamu NAKAO, Takeshi TAKEDA, Yoshiaki NOMURA, Hiroyuki KISHISHITA
  • Patent number: 9916920
    Abstract: A rotary variable resistor includes an insulating substrate, a resistor pattern and a current collector pattern that are provided on the insulating substrate, a rotor that is mounted on the insulating substrate in a rotatable manner, and a slider that is mounted on the rotor and makes sliding contact with the resistor pattern and the current collector pattern to cause the resistor pattern and the current collector pattern to be conducted to each other. When a maximum dimension of the resistor pattern, which defines a variable resistor, is Z [mm] and electric linearity is L [%], Z?4.0 and Z×L<10 are satisfied.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: March 13, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Masashi Morikami, Hiroyuki Kishishita, Takeshi Takeda, Osamu Nakao, Tomoyo Kitagawa
  • Publication number: 20170229220
    Abstract: A rotary variable resistor includes an insulating substrate, a resistor pattern and a current collector pattern that are provided on the insulating substrate, a rotor that is mounted on the insulating substrate in a rotatable manner, and a slider that is mounted on the rotor and makes sliding contact with the resistor pattern and the current collector pattern to cause the resistor pattern and the current collector pattern to be conducted to each other. When a maximum dimension of the resistor pattern, which defines a variable resistor, is Z [mm] and electric linearity is L [%], Z?4.0 and Z×L<10 are satisfied.
    Type: Application
    Filed: April 25, 2017
    Publication date: August 10, 2017
    Inventors: Masashi MORIKAMI, Hiroyuki KISHISHITA, Takeshi TAKEDA, Osamu NAKAO, Tomoyo KITAGAWA
  • Patent number: 7586302
    Abstract: A detection device and a rotation angle sensor include a case body and a cover member. A support portion in the case body is provided with fitting protuberances fitted in fitting holes of a printed board, on which a detection component is mounted, so as to position the printed board. Each protuberance has ribs protruding from an outer peripheral surface thereof. The ribs are elastically or plastically deformed by contact with an inner peripheral surface of the corresponding fitting hole of the board, and position the board along a support surface of the support portion. A projecting portion of the cover member is elastically or plastically deformed so as to urge the board toward the support surface of the support portion so that the board is clamped between the projecting portion and the support surface and is positioned in a direction perpendicular to the support surface of the support portion.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: September 8, 2009
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hong Eui Choi, Yukinori Ueda, Hiroyuki Kishishita
  • Publication number: 20080303514
    Abstract: A detection device and a rotation angle sensor reduce the bending stress of a substrate, avoid breaking, peeling, and soldering cracks of patterns, and provide high reliability and low production cost. A detection device includes an outer case defined by a case body and a cover member. A support portion in the case body is provided with fitting protuberances that are fitted in fitting holes of a printed board, on which a detection component is mounted, so as to position the printed board. Each protuberance has ribs protruding from an outer peripheral surface thereof. The ribs are elastically or plastically deformed by contact with an inner peripheral surface of the corresponding fitting hole of the printed board, and position the board along a support surface of the support portion.
    Type: Application
    Filed: December 26, 2007
    Publication date: December 11, 2008
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Hong Eui CHOI, Yukinori UEDA, Hiroyuki KISHISHITA
  • Patent number: 7129700
    Abstract: An angle sensor includes a magnet fixed to a rotational shaft and a Hall device disposed at neutral detection position C such that it faces the magnet, thereby detecting the rotational angle of the magnet based on an output of the Hall device. A magnetic member is attached to each of the magnetic poles of the magnet so that the maximum magnetic flux portions are away from the neutral detection position C in the circumferential direction of the shaft, thereby allowing the magnetic flux distribution to be biased to the direction opposite from the Hall device.
    Type: Grant
    Filed: December 26, 2003
    Date of Patent: October 31, 2006
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takeo Okubo, Hiroyuki Kishishita
  • Publication number: 20040140796
    Abstract: An angle sensor includes a magnet fixed to a rotational shaft and a Hall device disposed at neutral detection position C such that it faces the magnet, thereby detecting the rotational angle of the magnet based on an output of the Hall device. A magnetic member is attached to each of the magnetic poles of the magnet so that the maximum magnetic flux portions are away from the neutral detection position C in the circumferential direction of the shaft, thereby allowing the magnetic flux distribution to be biased to the direction opposite from the Hall device.
    Type: Application
    Filed: December 26, 2003
    Publication date: July 22, 2004
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Takeo Okubo, Hiroyuki Kishishita
  • Patent number: 6659845
    Abstract: A grinding method, in which the grinding operation is performed on a plurality of workpieces having different thicknesses with an end surface in the thickness direction of each workpiece being a surface to be ground, includes the steps of holding the workpieces with a holder such that the surfaces to be ground of the individual workpieces are aligned in the same plane, and grinding the surfaces to be ground of the workpieces while the workpieces are held by the holder. An electronic component provided with an element ground by the grinding method, and a variable capacitor provided with an element ground by the grinding method are also disclosed.
    Type: Grant
    Filed: January 12, 2001
    Date of Patent: December 9, 2003
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hiromichi Takeda, Hiroyuki Kishishita, Hidetoshi Kita, Keizo Morita
  • Patent number: 6625858
    Abstract: A method for producing a stator for use in a variable capacitor includes providing a stator having a protruded portion provided on a first main surface of a stator component such that the top surface of the protruded portion has a height greater than the thickness of each of conductive films disposed thereon. The method also includes polishing the first main surface of the stator component using the top surface of the protruded portion as a reference.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: September 30, 2003
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hiroyuki Kishishita, Hidetoshi Kita
  • Publication number: 20010041510
    Abstract: A grinding method, in which the grinding operation is performed on a plurality of workpieces having different thicknesses with an end surface in the thickness direction of each workpiece being a surface to be ground, includes the steps of holding the workpieces with a holder such that the surfaces to be ground of the individual workpieces are aligned in the same plane, and grinding the surfaces to be ground of the workpieces while the workpieces are held by the holder. An electronic component provided with an element ground by the grinding method, and a variable capacitor provided with an element ground by the grinding method are also disclosed.
    Type: Application
    Filed: January 12, 2001
    Publication date: November 15, 2001
    Inventors: Hiromichi Takeda, Hiroyuki Kishishita, Hidetoshi Kita, Keizo Morita
  • Publication number: 20010018789
    Abstract: A variable capacitor includes a stator having a protruded portion provided on a first main surface of a stator component such that the top surface of the protruded portion has a height greater than the thickness of each of conductive films disposed thereon. The first main surface of the stator component is polished using the top surface of the protruded portion as a reference.
    Type: Application
    Filed: February 7, 2001
    Publication date: September 6, 2001
    Inventors: Hiroyuki Kishishita, Hidetoshi Kita
  • Patent number: 6023406
    Abstract: An inductance/capacitance (LC) composite module with a built-in variable capacitor and coil is disclosed which includes a dielectric substrate having one principal surface on which a stator-side electrode is formed. Also formed thereon are a first terminal electrode connected to the stator-side electrode and a second terminal electrode independent of the first terminal electrode. The variable capacitor has a rotor of a chosen solid-state dielectric material in contact with the stator-side electrode. This rotor has thereon a rotor-side electrode which opposes the stator-side electrode with at least part of the rotor laid therebetween, thus forming an electrostatic capacitance. A rotatable support member is mounted so that it may rotate about the axis line at right angles to the substrate surface. The support member transmits its rotation to the rotor allowing the rotor to rotate with the support member.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: February 8, 2000
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Motohiro Kinoshita, Hiroyuki Kishishita
  • Patent number: 5979031
    Abstract: Manufacture of a metal rotor for a trimmer capacitor using cold forging or casting conventionally requires a metal mold to be exclusively used for the metal rotor, which incurs costs associated with the fabrication and maintenance of the mold. According to the invention, however, a metal rotor can be obtained by etching instead of cold forging or casting. Specifically, a metal plate is provided which has a principal surface with a predetermined degree of smoothness for a surface of a rotor electrode. The metal plate is selectively etched using resists, to form a step portion, a driver groove and a circumferential surface for the rotor electrode, which are the components of the metal rotor.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: November 9, 1999
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kunio Ito, Hiroyuki Kishishita, Yukinori Ueda
  • Patent number: 5867360
    Abstract: In a variable capacitor having a stator with a stator electrode and a rotor with a rotor electrode both of which are housed in a recess section of a casing while allowing the recess section to be closed by a cover, enabling the rotor to be brought into stable close contact with the stator. To this end, a cover (46) made of a chosen metal includes a cover main body (55) which covers the upper opening of a recess section (45) except for an adjustment hole (54) that exposes a driver groove (30) of the rotor (43), leg sections (56, 57) which engage a casing (44) letting the cover main body (55) be secured to the casing (44), and a rotor terminal. The cover main body (55) has a size corresponding to the outer diameter of the variable capacitor (41). This cover main body (55) may have a vent shape so as to create intended elastic force which may act to compress the rotor (43) against the stator (42).
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: February 2, 1999
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hiroyuki Kishishita, Yukinori Ueda
  • Patent number: 5461535
    Abstract: In a rotor which is rotated for adjusting capacitance provided by a variable capacitor, a portion for receiving a tool for rotating the same is defined by a through-hole. Thus, it is possible to protect the rotor from application of a pressing force from the tool, thereby suppressing change of a clearance between the rotor and a stator. Consequently, it is possible to stabilize the capacitance as the capacitor is being adjusted, as well as to reduce setting drift that causes the capacitance as adjusted disadvantageously to change when the tool is separated from the rotor.
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: October 24, 1995
    Assignee: Murata Mfg. Co., Ltd.
    Inventors: Hiroyuki Kishishita, Hidetoshi Kita
  • Patent number: 5423930
    Abstract: A method of manufacturing an electronic component having a concave portion. A ceramic laminate is prepared having a plurality of sheets with burnaway film formed thereon. The burnaway film material is capable of being burned away by firing. The burnaway film is provided in layers in positions corresponding to the desired position of the concave portion. Firing the ceramic laminate burns out the burnaway film, and a sintered body is formed with a plurality of cavities provided in layers between a plurality of thin laminate layers. Crushing the thin layers of the sintered body forms the concave portion.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: June 13, 1995
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hiroyuki Kishishita, Yukio Hatanaka, Yukinori Ueda
  • Patent number: 5424906
    Abstract: In order to obtain a stator of a variable capacitor, prepared is a ceramic laminate having a stator electrode provided in its interior and a plurality of burnaway films of carbon or resin, which can be burned away by firing, provided in positions corresponding to that of a concave portion in the form of layers. This ceramic laminate is fired to burn out the burnaway films thereby obtaining a sintered body provided with a plurality of cavities and a plurality of thin layers, and this sintered body is barrel-polished to crush the thin layers, thereby forming a concave portion. A rotor of a metal forming a rotor electrode is arranged on the stator obtained in the aforementioned manner. A cover of a metal is fixed to the stator through an engaging member engaging in the concave portion of the stator, to rotatably store the rotor while pressing the rotor against the stator by a spring action part.
    Type: Grant
    Filed: April 14, 1993
    Date of Patent: June 13, 1995
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hiroyuki Kishishita, Yukio Hatanaka, Yukinori Ueda
  • Patent number: 5229912
    Abstract: In a trimmer capacitor comprising a stator having a stator electrode, a rotor having a rotor electrode and a shaft holding the rotor in a rotatable manner with respect to the stator, the stator is formed of resin containing a dielectric ceramic material. The stator electrode is located in the interior of the stator, so that the stator electrode is opposed to the rotor electrode through a dielectric layer which is defined by an integral part of the stator. The stator, the stator electrode and the dielectric member which are required for the trimmer capacitor are entirely integrated with each other in the stator, whereby the trimmer capacitor can be easily assembled. The resin, containing the dielectric ceramic material, forming the dielectric layer is superior in shock resistance to a ceramic material, whereby no problem of cracking etc. occurs even if the thickness of the dielectric layer is reduced.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: July 20, 1993
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hiroyuki Kishishita, Jun Harada