Patents by Inventor Akira Koyama

Akira Koyama 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: 10648398
    Abstract: In an intake structure of an internal combustion engine, on an intake upstream side from a valve seat of an intake port, a convex portion is provided which protrudes to an inside of the intake port in a place near an outer circumferential portion of a cylinder chamber when viewed from an upper side of the cylinder chamber. The convex portion includes an upstream guide surface extending from an apex of the convex portion to the intake upstream side, and a downstream guide surface extending from the apex to an intake downstream side and including a curved surface recessed inside the convex portion at a middle portion thereof.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: May 12, 2020
    Assignee: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
    Inventors: Akira Yoshihara, Koichi Matsumoto, Shigeki Nabetani, Kazuaki Koyama, Yuya Okamoto
  • Patent number: 10641200
    Abstract: A cooling structure of a water-cooled engine includes: a plurality of cylinders 2 arranged in a cylinder block 1; and a water jacket W formed around the plurality of cylinders 2. The water jacket W includes a pair of main flow paths 7, 8 formed in a state of extending in a cylinder arrangement direction outside the cylinders, and inter-bore flow paths 9, 10 formed between adjacent cylinders 2 in a state of connecting the pair of main flow paths 7, 8. Guide walls 11h, 13h, capable of guiding the cooling water flowing in the main flow paths 7, 8 to the inter-bore flow paths 9, 10, are formed in the cylinder block 1.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: May 5, 2020
    Assignee: KUBOTA Corporation
    Inventors: Hiroki Oso, Takahiro Yamazaki, Hideyuki Koyama, Rina Kaneko, Yoshinori Tanaka, Takashi Yamaguchi, Akira Tanaka
  • Patent number: 10564370
    Abstract: A method for fabricating an optical connecting device with a holder having a through hole, multiple optical fibers, a guide member, and a resin body includes steps of: preparing optical-fiber parts to provide the multiple optical fibers; preparing first and second parts to provide the holder, the first and second parts having grooves for providing the through hole of the holder; fixing the parts providing the holder and the optical-fiber parts to each other to form a first product having the through hole produced from the grooves; providing an optical connector tool; positioning a component of the tool in the through hole of the first product to provide the guide member; and thereafter, fixing the component in the through hole with resin to form a second product in which the resin provides the resin body.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: February 18, 2020
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Mitsuharu Hirano, Akira Furuya, Koichi Koyama, Masahiro Shibata
  • Patent number: 10536097
    Abstract: An ultrasonic motor includes an annular vibrator and an annular moving member that is brought into pressure-contact with the vibrator. The vibrator includes an annular vibrating plate and an annular piezoelectric element. The piezoelectric element includes an annular lead-free piezoelectric ceramic piece, a common electrode arranged on one surface of the piezoelectric ceramic piece, and a plurality of electrodes arranged on the other surface of the piezoelectric ceramic piece. The plurality of electrodes include two drive phase electrodes, one or more non-drive phase electrodes, and one or more detection phase electrodes. A second surface of the vibrating plate includes a plurality of groove regions extending radially, and the depths of the groove regions change in a circumferential direction along a curve obtained by superimposing one or more sine waves on one another. The ultrasonic motor exhibits a sufficient drive speed while suppressing generation of an unnecessary vibration wave.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: January 14, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Uebayashi, Tatsuo Furuta, Miki Ueda, Hidenori Tanaka, Shinya Koyama, Kaoru Miura, Atsushi Kimura, Satoshi Fujita
  • Publication number: 20200003813
    Abstract: The present invention intends to provide a liquid sensor device that achieves both the improvement of durability and the improvement of property determination accuracy. The liquid sensor device includes: an electrode pair 22 that is formed on a sensor board 2 and covered by an insulating protective film 201; a resistance measurement part 302 that supplies AC current to the electrode pair 22 to measure the resistance value of oil 4; a parasitic capacitance storage part 304 that holds the parasitic capacitance Cs of the electrode pair 22; and a property determination part 313 that, on the basis of the resistance value R1 and the parasitic capacitance Cs, determines the deterioration of the oil 4.
    Type: Application
    Filed: June 12, 2019
    Publication date: January 2, 2020
    Applicant: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Tatsunari KOYAMA, Akira NAKATSU
  • Patent number: 10516091
    Abstract: An ultrasonic motor, usable in a drive control system and the like, includes an annular vibrator and an annular moving member arranged so as to be brought into pressure-contact with the vibrator. The vibrator includes an annular vibrating plate and an annular piezoelectric element. The piezoelectric element includes an annular piezoelectric ceramic piece, a common electrode arranged on one surface of the piezoelectric ceramic piece, and a plurality of electrodes arranged on the other surface of the piezoelectric ceramic piece. The piezoelectric ceramic piece contains lead in a content of less than 1,000 ppm. The plurality of electrodes include two drive phase electrodes, one or more non-drive phase electrodes, and one or more detection phase electrodes.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: December 24, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuo Furuta, Akira Uebayashi, Hidenori Tanaka, Shinya Koyama, Makoto Kubota, Jumpei Hayashi
  • Publication number: 20190379305
    Abstract: A vibration wave motor includes an annular oscillator, and an annular moving member provided so as to be in press contact with the oscillator. The oscillator includes an annular vibrating plate, and an annular piezoelectric element provided on a first surface of the vibrating plate. The vibrating plate is in contact with the moving member via a second surface of the vibrating plate, which is opposite of the first surface. The piezoelectric element has a plurality of drive phase electrodes. When a driving region represents a region of the oscillator in which each drive phase electrode is provided, and a non-driving region represents a remaining region of the oscillator, a contact area ratio S1 between the vibrating plate and the moving member in the non-driving region is less than a contact area ratio S2 between the vibrating plate and the moving member in the driving region.
    Type: Application
    Filed: June 3, 2019
    Publication date: December 12, 2019
    Inventors: Tomohiro Watanabe, Akira Uebayashi, Tatsuo Furuta, Shinya Koyama
  • Publication number: 20190345855
    Abstract: In an engine that includes a blow-by-gas returning system configured to direct blow-by gas within a crankcase to an intake system through an inside of a head cover, the intake system includes a cover intake-passage disposed at a blow-by-gas outlet of the head cover, and the cover intake-passage communicates with a blow-by-gas passage of the blow-by-gas outlet.
    Type: Application
    Filed: May 13, 2019
    Publication date: November 14, 2019
    Inventors: Hiroki OSO, Akira TANAKA, Hideyuki KOYAMA, Rina KANEKO, Nobuyoshi OKADA
  • Publication number: 20190334458
    Abstract: The present invention provides a vibrator made of a non-lead-based piezoelectric material and capable of being driven at a sufficient speed with low power consumption, and provides a vibration wave drive device and an electronical device each using the vibrator. To that end, the vibrator according to the present invention includes a piezoelectric element including a piezoelectric material and electrodes, and an elastic body, wherein a Pb component contained in the piezoelectric material is less than 1000 ppm, and a resonance frequency fA in a vibration mode A and a resonance frequency fB in a vibration mode B satisfy a relation of an absolute value of (fB?fA)>2 (kHz), the vibration mode A and the vibration mode B generating vibration waves in the elastic body with wave fronts of the vibration waves intersecting each other.
    Type: Application
    Filed: December 21, 2017
    Publication date: October 31, 2019
    Inventors: Tatsuo Furuta, Takayuki Watanabe, Miki Ueda, Shinya Koyama, Makoto Kubota, Takanori Matsuda, Akira Uebayashi, Jumpei Hayashi, Hitoshi Nishitani
  • Patent number: 10451833
    Abstract: A vibrator and an ultrasonic motor can exhibit a sufficient drive speed even when using lead-free piezoelectric ceramics. The ultrasonic motor includes an annular vibrator and an annular moving member arranged so as to be brought into pressure-contact with the vibrator. The vibrator includes an annular vibrating plate and an annular piezoelectric element. The piezoelectric element includes an annular piezoelectric ceramic piece, a common electrode arranged on one surface of the piezoelectric ceramic piece, and a plurality of electrodes arranged on the other surface of the piezoelectric ceramic piece. The piezoelectric ceramic piece contains lead in a content of less than 1,000 ppm. The plurality of electrodes include two drive phase electrodes, at least one non-drive phase electrode, and at least one detection phase electrode.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: October 22, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jumpei Hayashi, Akira Uebayashi, Tatsuo Furuta, Hidenori Tanaka, Shinya Koyama, Makoto Kubota
  • Publication number: 20190302380
    Abstract: An optical module that enables to couple a semiconductor optical device with a photonic device by a preset angle is disclosed. The optical module provides a housing that installs the semiconductor optical device. The housing provides a bottom with a bottom opening, a ceiling facing the bottom, and at least one side wall connecting the ceiling to the bottom. The side wall includes an outer surface extending along a direction normal to the bottom and an inner surface making an acute angle against the outer surface. The semiconductor optical device is mounted on the inner surface facing the one end thereof against the bottom opening to optically couple with an optical signal through the bottom opening.
    Type: Application
    Filed: March 15, 2019
    Publication date: October 3, 2019
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Akira FURUYA, Koichi KOYAMA
  • Patent number: 10415443
    Abstract: There is provided an engine capable of reducing oil consumption. The engine includes a cylinder head, a cylinder head cover mounted above the cylinder head, a rocker arm covered by the cylinder head cover, and a breather chamber provided inside the cylinder head cover. As a front-rear direction is defined by a longitudinal direction of the cylinder head cover, the breather chamber has a blow-by gas inlet at one side in the front-rear direction, a blow-by gas outlet at another side in the front-rear direction, and an oil discharging guide chamber at an intermediate part in the front-rear direction. The blow-by gas inlet is opened on a bottom wall of the breather chamber, and a peripheral wall of the oil discharging guide chamber is protruded downwardly from the bottom wall of the breather chamber toward between the rocker arm provided at a side of the blow-by gas outlet and the blow-by gas inlet.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: September 17, 2019
    Assignee: KUBOTA Corporation
    Inventors: Kentaro Nagai, Takahiro Yamazaki, Takahito Hamasaki, Hideyuki Goto, Hiroki Oso, Hideyuki Koyama, Akira Tanaka, Yoshinori Tanaka
  • Patent number: 10411167
    Abstract: A semiconductor light emitting apparatus includes: a stem part having a stem base, a lead terminal, and a metal member having a closed shape, the stem base having an inner portion having a first face, a second face and an opening extending in a first direction from the first face to the second face, and an outer portion surrounding the inner portion, the inner and outer portions being arranged along a reference plane intersecting the first direction, the lead terminal being supported in the opening, and the metal member being disposed on the outer portion so as to surround the inner portion and having a first portion supported by a top face of the outer portion, and a second portion extending outward with reference to an edge of the outer portion; a semiconductor optical element disposed on the inner portion; and a cap disposed on the metal member.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: September 10, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Koichi Koyama, Akira Furuya
  • Publication number: 20190263608
    Abstract: A sheet separating device includes a sheet separator that includes plural separating portions which have a planar shape and which are stacked one on top of another. The sheet separator has openings provided between the plural separating portions at both ends of the plural separating portions in a sheet passing direction. The sheet separator allows gaps between the plural separating portions facing one another to receive one of plural sheets apiece so as to cause the plural sheets to be kept separated from one another. The sheet separating device is held on a placement portion of a sheet processing apparatus that includes a sheet processing unit and the placement portion. The sheet processing unit sequentially feeds thereinto the plural sheets through a feeding opening and performs processing on the plural sheets. The plural sheets to be fed through the feeding opening are placed on the placement portion.
    Type: Application
    Filed: August 27, 2018
    Publication date: August 29, 2019
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takaharu KOYAMA, Akira HARADA, Mitsuaki KURODA, Masahito SHIKATA, Yuji HAYAKAWA
  • Patent number: 10381793
    Abstract: A ground connection structure is a structure for collectively connecting, to a body of a vehicle, a plurality of grounding wires which are connected to respective electrical components installed in the vehicle. The ground connection structure includes: a connection box to which the plurality of grounding wires are connected; a grounding terminal part connected to the vehicle in an electrically conducting state; and an electrically conducting connection part having one end connected to the connection box and the other end connected to the grounding terminal part, the electrically conducting connection part connecting the connection box and the grounding terminal part in an electrically conducting manner. The electrically conducting connection part is made of a low-inductance material having low inductance.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: August 13, 2019
    Assignee: YAZAKI CORPORATION
    Inventors: Yukinari Naganishi, Akira Baba, Takashi Odajima, Hirohito Habara, Hideaki Saitoh, Takao Ota, Akihiro Koyama, Atsushi Nakata
  • Publication number: 20190246013
    Abstract: A vibration device comprises a vibrating member having at least n (n?2) piezoelectric elements arranged on a vibrating plate, each of the piezoelectric elements being formed by using a lead-free piezoelectric material and electrodes, wherein if the temperature that maximizes the piezoelectric constant of the piezoelectric material of each of the n piezoelectric elements is expressed as Tm (m being a natural number between 1 and n), at least two of T1 through Tn differ from each other.
    Type: Application
    Filed: January 29, 2019
    Publication date: August 8, 2019
    Inventors: Yasushi Shimizu, Takanori Matsuda, Shinya Koyama, Makoto Kubota, Akira Uebayashi, Kanako Oshima
  • Patent number: 10332937
    Abstract: A semiconductor device includes: a printed substrate having a through hole from an upper face to a lower face thereof; a first semiconductor element mounted on the printed substrate; an interposer mounted on the upper face of the printed substrate; a second semiconductor element adjacent to the interposer and arranged to overlap with the through hole; and a bonding wire coupling a first pad to a second pad, the first pad being on an upper face of the interposer and being positioned on the second semiconductor element side, the second pad being on an upper face of the second semiconductor element and being positioned on the interposer side, wherein the interposer has an edge face protruding with respect to a wall face of the through hole of the printed substrate toward the second semiconductor element, and the edge face faces with an edge face of the second semiconductor element.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: June 25, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Akira Furuya, Koichi Koyama, Mitsuharu Hirano
  • Publication number: 20190186343
    Abstract: In an intake structure of an internal combustion engine, on an intake upstream side from a valve seat of an intake port, a convex portion is provided which protrudes to an inside of the intake port in a place near an outer circumferential portion of a cylinder chamber when viewed from an upper side of the cylinder chamber. The convex portion includes an upstream guide surface extending from an apex of the convex portion to the intake upstream side, and a downstream guide surface extending from the apex to an intake downstream side and including a curved surface recessed inside the convex portion at a middle portion thereof.
    Type: Application
    Filed: December 18, 2018
    Publication date: June 20, 2019
    Applicant: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
    Inventors: Akira YOSHIHARA, Koichi MATSUMOTO, Shigeki NABETANI, Kazuaki KOYAMA, Yuya OKAMOTO
  • Publication number: 20190186386
    Abstract: There is provided an engine stopping device including a stopping solenoid, where an operating shaft, interlocked to a control rack of a fuel injection pump, is rotatably supported by an engine case in a pass-through manner. The control rack is forcibly movable to a stopping position by an action of the stopping solenoid on an operation arm provided for a projecting portion of the operating shaft in an integrally rotatable manner. An extending-retracting rod of the stopping solenoid and the operation arm are interlocked by fitting engagement between a pin provided for the extending-retracting rod and a cut-out portion of the operation arm. The cut-out portion is configured in a shape elongated along a direction perpendicular to a movement trajectory of the extending-retracting rod.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 20, 2019
    Inventors: Akira TANAKA, Hiroki OSO, Yoshinori TANAKA, Hideyuki KOYAMA, Takahiro YAMAZAKI, Nobuyoshi OKADA
  • Patent number: RE47640
    Abstract: A semiconductor device includes a semiconductor substrate, an nMISFET formed on the substrate, the nMISFET including a first dielectric formed on the substrate and a first metal gate electrode formed on the first dielectric and formed of one metal element selected from Ti, Zr, Hf, Ta, Sc, Y, a lanthanoide and actinide series and of one selected from boride, silicide and germanide compounds of the one metal element, and a pMISFET formed on the substrate, the pMISFET including a second dielectric formed on the substrate and a second metal gate electrode formed on the second dielectric and made of the same material as that of the first metal gate electrode, at least a portion of the second dielectric facing the second metal gate electrode being made of an insulating material different from that of at least a portion of the first dielectric facing the first metal gate electrode.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: October 8, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Reika Ichihara, Yoshinori Tsuchiya, Masato Koyama, Akira Nishiyama