Patents by Inventor Michihiro Ito
Michihiro Ito 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: 20240141213Abstract: A gas generating agent which generates a gas by light irradiation, which has a maximum molar absorption coefficient value of 7000 or more at a wavelength of 240 nm to 450 nm, and which contains a gas generating moiety having a specific structure and an organopolysiloxane group or a fluorinated aliphatic hydrocarbon group in which a number of carbon atoms to which a fluorine atom is directly bound is from 2 to 8 and which optionally contains an ether bond (—O—) in a carbon chain.Type: ApplicationFiled: December 22, 2021Publication date: May 2, 2024Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Yohei ITO, Michihiro OGURA
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Publication number: 20240087615Abstract: A base plate is a portion of a housing of a disk driving device having a disk rotating with a rotation axis as a center, and is a cast product. The base plate has a bottom plate part and a peripheral wall part. The bottom plate part has a rectangular shape when viewed in an axial direction. The peripheral wall part extends from an outer peripheral edge of the bottom plate part toward a side of the axial direction to surround the periphery of the bottom plate part. A metal member embedded in the peripheral wall part is provided.Type: ApplicationFiled: September 7, 2023Publication date: March 14, 2024Applicant: NIDEC CORPORATIONInventors: Koutarou MIYATA, Michihiro Ito, Takashi Mitsunari, Ryo Furuya, Kenta Miyoshi
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Publication number: 20230168036Abstract: A heat treatment furnace disclosed herein may include: a heat treatment unit configured to heat-treat an object; a cooling unit configured to cool the object heat-treated by the heat treatment unit; and a conveyor configured to convey the object in the heat treatment unit and the cooling unit. The cooling unit may include a housing, wherein the housing is disposed below a conveyance path on which the object is conveyed by the conveyor and configured to cool the object being conveyed by the conveyor by liquid flowing inside the housing. The housing may include an upper plate facing the object being conveyed by the conveyor. The upper plate may be tilted so that gas stays at a predetermined portion of the housing while the liquid is flowing in the housing.Type: ApplicationFiled: October 25, 2022Publication date: June 1, 2023Applicants: NGK INSULATORS, LTD., NGK KILNTECH, CORPORATIONInventors: Takanori ISONO, Taiki KINNAN, Michihiro ITO
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Patent number: 11646061Abstract: A base plate is a portion of a housing of a disk drive apparatus, including a base body being a casting product, and an electrodeposition coating film covering at least a portion of a surface of the base body. The base body includes a bottom plate rectangular as viewed from an axial direction, a pivot post, and a protrusion. The bottom plate extends perpendicular to a rotation axis of a disk that extends vertically and a swing axis of a head that is disposed in a different position from the rotation axis and that extends vertically. The head reads or writes information from or to the disk. The pivot post protrudes upward from an upper surface of the bottom plate along the swing axis. The protrusion is provided protruding radially outward from a peripheral surface of the pivot post and protruding to the upper surface of the bottom plate.Type: GrantFiled: February 18, 2022Date of Patent: May 9, 2023Assignee: NIDEC CORPORATIONInventors: Michihiro Ito, Ryo Furuya
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Publication number: 20220262403Abstract: A base plate is a portion of a housing of a disk drive apparatus, including a base body being a casting product, and an electrodeposition coating film covering at least a portion of a surface of the base body. The base body includes a bottom plate rectangular as viewed from an axial direction, a pivot post, and a protrusion. The bottom plate extends perpendicular to a rotation axis of a disk that extends vertically and a swing axis of a head that is disposed in a different position from the rotation axis and that extends vertically. The head reads or writes information from or to the disk. The pivot post protrudes upward from an upper surface of the bottom plate along the swing axis. The protrusion is provided protruding radially outward from a peripheral surface of the pivot post and protruding to the upper surface of the bottom plate.Type: ApplicationFiled: February 18, 2022Publication date: August 18, 2022Applicant: NIDEC CORPORATIONInventors: Michihiro ITO, Ryo FURUYA
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Publication number: 20220262408Abstract: A base plate is a portion of a housing of a disk drive apparatus, including a base body defined by a metal die cast member, and an electrodeposition coating film covering at least a portion of a surface of the base body. The base body includes a bottom plate rectangular as viewed from an axial direction, and a pivot post. The bottom plate extends perpendicular to a rotation axis of a disk and a swing axis of a head. The rotation axis extends vertically. The swing axis is disposed in a different position from the rotation axis and extends vertically. The head reads or writes information from or to the disk. The pivot post protrudes upward from an upper surface of the bottom plate along the swing axis, and a portion of the die cast member is segregated.Type: ApplicationFiled: February 16, 2022Publication date: August 18, 2022Applicant: NIDEC CORPORATIONInventors: Michihiro ITO, Ryo FURUYA
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Publication number: 20220262399Abstract: A base plate includes a base body including a bottom plate and a pivot post, and an electrodeposition coating film. The bottom plate extends perpendicular to a first axis, a rotation axis of the disk, and a second axis, a swing axis of a head; and, when viewed from an axial direction, has a rectangular shape with a first direction as a short side direction and a second direction as a long side direction. The pivot post protrudes upward from an upper surface of the bottom plate at a position overlapping the second axis. The bottom plate has a thin bottom arranged in a radially outward direction orthogonal to the second axis of the pivot post and including at least one of a lower recess recessed upward from a lower surface of the bottom plate and an upper recess recessed downward from the upper surface of the bottom plate.Type: ApplicationFiled: February 16, 2022Publication date: August 18, 2022Applicant: NIDEC CORPORATIONInventors: Michihiro ITO, Ryo FURUYA
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Patent number: 10236745Abstract: A circuit board is in the shape of a strip and includes: in one longitudinal end portion thereof, power connection portions connected to an external power supply; in another longitudinal end portion thereof, land portions to which portions of conducting wires drawn out downwardly of a base portion are connected; and pattern portions electrically connected to the power connection portions and the land portions. The land portions include a first land portion, and a second land portion arranged adjacent to the first land portion. The pattern portions include a first pattern portion electrically connected to the first land portion, and a second pattern portion arranged adjacent to the first pattern portion, and electrically connected to the second land portion. The first pattern portion and the second land portion are arranged to overlap with each other when viewed in a widthwise direction of the circuit board.Type: GrantFiled: November 21, 2016Date of Patent: March 19, 2019Assignee: NIDEC CORPORATIONInventors: Michihiro Ito, Mitsuo Kodama, Tadashi Hasegawa
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Patent number: 9990959Abstract: A base of a disk drive apparatus includes a bottom plate portion and a wall portion. The wall portion includes an increased thickness portion and a decreased thickness portion. An inner surface of the increased thickness portion includes a first slanting surface arranged to extend radially outward away from a central axis while extending axially away from the bottom plate portion. An inner surface of the decreased thickness portion includes a second slanting surface arranged to extend radially outward away from the central axis while extending axially away from the bottom plate portion, and protrude radially inward relative to the first slanting surface. An inclination angle of the second slanting surface with respect to an axial direction is arranged to be smaller than an inclination angle of the first slanting surface with respect to the axial direction.Type: GrantFiled: December 7, 2017Date of Patent: June 5, 2018Assignee: NIDEC CORPORATIONInventors: Michihiro Ito, Yasutaka Ino, Masaya Haraguchi
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Patent number: 9879691Abstract: A pump a shaft portion arranged to extend in a vertical direction; a rotor portion arranged to surround an outer circumference of the shaft portion, and including a magnet; and a housing joined to the shaft portion, and arranged to contain the rotor portion. The housing includes a stator arranged opposite to the magnet; a rotor accommodating portion arranged to accommodate the rotor portion; and an inlet and an outlet each of which is arranged to pass through a portion of the rotor accommodating portion. A surface of at least one of the rotor portion, the shaft portion, and the rotor accommodating portion includes at least one first dynamic pressure groove arranged to support rotation of the rotor portion. A surface of at least one of the rotor portion and the rotor accommodating portion includes at least one second dynamic pressure groove arranged to transfer a fluid from the inlet to the outlet.Type: GrantFiled: August 7, 2015Date of Patent: January 30, 2018Assignee: NIDEC CORPORATIONInventors: Junya Mizukami, Hideki Nishimura, Yoshito Nishitani, Michihiro Ito, Naohiro Nagasawa
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Publication number: 20170353076Abstract: A circuit board is in the shape of a strip and includes: in one longitudinal end portion thereof, power connection portions connected to an external power supply; in another longitudinal end portion thereof, land portions to which portions of conducting wires drawn out downwardly of a base portion are connected; and pattern portions electrically connected to the power connection portions and the land portions. The land portions include a first land portion, and a second land portion arranged adjacent to the first land portion. The pattern portions include a first pattern portion electrically connected to the first land portion, and a second pattern portion arranged adjacent to the first pattern portion, and electrically connected to the second land portion. The first pattern portion and the second land portion are arranged to overlap with each other when viewed in a widthwise direction of the circuit board.Type: ApplicationFiled: November 21, 2016Publication date: December 7, 2017Inventors: Michihiro ITO, Mitsuo KODAMA, Tadashi HASEGAWA
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Patent number: 9464717Abstract: Provided is a piston ring such that it is possible to sufficiently inhibit adhesive wear when the piston ring is mounted to a piston for a diesel engine in which at least the piston ring groove in the piston is formed from steel or cast iron. Disclosed is a piston ring mounted to a piston for a diesel engine, wherein the load length ratio (Rmr2) (in accordance with JIS B0601:2001) of the top surface and bottom surface of the piston ring satisfies each of the following conditions: Rmr2 (0.5%, 0.3[mu]m)=20% and Rmr2 (0.5%, 0.4[mu]m)=40%.Type: GrantFiled: January 28, 2011Date of Patent: October 11, 2016Assignee: NIPPON PISTON RING CO., LTD.Inventors: Michihiro Ito, Naoyuki Akimoto, Iwao Hiraishi, Makoto Kajiwara, Atsushi Chiba
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Publication number: 20160053769Abstract: A pump a shaft portion arranged to extend in a vertical direction; a rotor portion arranged to surround an outer circumference of the shaft portion, and including a magnet; and a housing joined to the shaft portion, and arranged to contain the rotor portion. The housing includes a stator arranged opposite to the magnet; a rotor accommodating portion arranged to accommodate the rotor portion; and an inlet and an outlet each of which is arranged to pass through a portion of the rotor accommodating portion. A surface of at least one of the rotor portion, the shaft portion, and the rotor accommodating portion includes at least one first dynamic pressure groove arranged to support rotation of the rotor portion. A surface of at least one of the rotor portion and the rotor accommodating portion includes at least one second dynamic pressure groove arranged to transfer a fluid from the inlet to the outlet. The rotor portion includes a through hole arranged to pass therethrough in an axial direction.Type: ApplicationFiled: August 7, 2015Publication date: February 25, 2016Inventors: Junya MIZUKAMI, Hideki NISHIMURA, Yoshito NISHITANI, Michihiro ITO, Naohiro NAGASAWA
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Publication number: 20160053770Abstract: A pump a shaft portion arranged to extend in a vertical direction; a rotor portion arranged to surround an outer circumference of the shaft portion, and including a magnet; and a housing joined to the shaft portion, and arranged to contain the rotor portion. The housing includes a stator arranged opposite to the magnet; a rotor accommodating portion arranged to accommodate the rotor portion; and an inlet and an outlet each of which is arranged to pass through a portion of the rotor accommodating portion. A surface of at least one of the rotor portion, the shaft portion, and the rotor accommodating portion includes at least one first dynamic pressure groove arranged to support rotation of the rotor portion. A surface of at least one of the rotor portion and the rotor accommodating portion includes at least one second dynamic pressure groove arranged to transfer a fluid from the inlet to the outlet.Type: ApplicationFiled: August 7, 2015Publication date: February 25, 2016Inventors: Junya MIZUKAMI, Hideki NISHIMURA, Yoshito NISHITANI, Michihiro ITO, Naohiro NAGASAWA
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Publication number: 20130234400Abstract: A piston ring reduces reciprocating friction between a piston and an inner wall surface of a cylinder, while maintaining reduction effect of the reciprocating friction. The piston ring is mounted in a ring groove of the piston, and slides against the inner wall surface of a cylinder liner or a cylinder. The piston ring includes: plural fine recessed portions formed in a barrel width region on an outer peripheral sliding surface of the piston ring; and a non-recessed portion area where no recessed portions are formed in the barrel width region. The non-recessed portion area is configured to have an area percentage within a range from 20-85% in the barrel width region where an area percentage of the barrel width region before the recessed portions are formed is defined to be 100%. The non-recessed portion area exists through an entire cross section in an axial direction of the barrel width.Type: ApplicationFiled: November 15, 2011Publication date: September 12, 2013Applicant: NIPPON PISTON RING CO., LTD.Inventors: Akira Iijima, Hirokazu Murata, Michihiro Ito
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Publication number: 20130043659Abstract: Provided is a piston ring such that it is possible to sufficiently inhibit adhesive wear when the piston ring is mounted to a piston for a diesel engine in which at least the piston ring groove in the piston is formed from steel or cast iron. Disclosed is a piston ring mounted to a piston for a diesel engine, wherein the load length ratio (Rmr2) (in accordance with JIS B0601:2001) of the top surface and bottom surface of the piston ring satisfies each of the following conditions: Rmr2 (0.5%, 0.3[mu]m)=20% and Rmr2 (0.5%, 0.4[mu]m)=40%.Type: ApplicationFiled: January 28, 2011Publication date: February 21, 2013Applicant: NIPPON PISTON RING CO., LTD.Inventors: Michihiro Ito, Naoyuki Akimoto, Iwao Hiraishi, Makoto Kajiwara, Atsushi Chiba
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Patent number: 8215842Abstract: A fluid dynamic pressure bearing includes a shaft arranged along a central axis, an annular member fixed to the shaft, a sleeve, a lubricant, and a lubricating film. A stepped surface is provided on the outer circumferential surface of the shaft. The annular member preferably includes a lower surface extending radially with respect to the central axis and arranged to make contact with the stepped surface in the inner edge portion of the lower surface. The sleeve preferably includes an upper surface axially opposed to the lower surface of the annular member. The lubricant is provided between the shaft and the sleeve and between the annular member and the sleeve. The lubricating film is provided on the lower surface of the annular member at least over a region lying radially outwardly of the inner edge portion of the lower surface.Type: GrantFiled: January 30, 2009Date of Patent: July 10, 2012Assignee: Nidec CorporationInventors: Tetsuya Maruyama, Makoto Kutsukake, Hirofumi Kojima, Michihiro Ito, Masayoshi Saichi
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Publication number: 20090196540Abstract: A fluid dynamic pressure bearing includes a shaft arranged along a central axis, an annular member fixed to the shaft, a sleeve, a lubricant, and a lubricating film. A stepped surface is provided on the outer circumferential surface of the shaft. The annular member preferably includes a lower surface extending radially with respect to the central axis and arranged to make contact with the stepped surface in the inner edge portion of the lower surface. The sleeve preferably includes an upper surface axially opposed to the lower surface of the annular member. The lubricant is provided between the shaft and the sleeve and between the annular member and the sleeve. The lubricating film is provided on the lower surface of the annular member at least over a region lying radially outwardly of the inner edge portion of the lower surface.Type: ApplicationFiled: January 30, 2009Publication date: August 6, 2009Applicant: Nidec CorporationInventors: Tetsuya MARUYAMA, Makoto KUTSUKAKE, Hirofumi KOJIMA, Michihiro ITO, Masayoshi SAICHI
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Patent number: 7110505Abstract: The present invention discloses an X-ray source comprising an X-ray source including a high-voltage applying part for generating an X-ray projecting from a bulb part; a power supply including an insulating block molding therein a voltage generating part for supplying a voltage to the high-voltage applying part; and a metallic tubular member accommodating the bulb part and securing the X-ray tube. The metallic tubular member is secured to the outside of the insulating block. The metallic tubular member encapsulates therein an insulating liquid material for the bulb part to be dipped therein.Type: GrantFiled: March 2, 2006Date of Patent: September 19, 2006Assignee: Hamamatsu Photonics K.K.Inventors: Kazutaka Suzuki, Michihiro Ito, Takatoshi Yoshiyama, Hiroki Kawakami, Tutomu Inazuru
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Patent number: D554754Type: GrantFiled: February 23, 2005Date of Patent: November 6, 2007Assignee: Hamamatsu Photonics K.K.Inventors: Michihiro Ito, Kazutaka Suzuki