Patents by Inventor Masakazu Yamaoka

Masakazu Yamaoka 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: 10670819
    Abstract: A non-plated region is formed in a certain range from an end of a submount. The non-plated region is a portion where a plating layer is not provided, and thus a substrate of the submount is exposed. An intermediate layer is formed on the plating layer. Furthermore, a plating layer is formed on the intermediate layer. A semiconductor laser is formed on the plating layer. The position of an end of the semiconductor laser substantially coincides with the position of an end of the plating layer (the intermediate layer). That is, even in a case where there is a deviation between an end face of the intermediate layer and an end face of the semiconductor laser, the amount of this deviation is sufficiently smaller than the amount by which the intermediate layer is set back from an end face of the submount.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: June 2, 2020
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masakazu Miura, Jun Miyokawa, Kazuki Yamaoka, Hajime Mori
  • Patent number: 10610558
    Abstract: The present invention provides a prophylactic and/or therapeutic agent for non-alcoholic fatty liver disease (NAFLD), and particularly non-alcoholic steatohepatitis (NASH) comprising an ume (Japanese apricot) juice concentrate or a processed product thereof. The prophylactic and/or therapeutic agent is obtained by utilizing a component contained in a plant or a processed product thereof, and hence is safe and easily taken. It has been confirmed that when the ume juice concentrate or the processed product thereof is orally administered to a streptozocin (STZ)-induced NAFLD model mouse or an STZ-induced NASH model mouse, liver fibrogenesis can be reduced.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: April 7, 2020
    Assignees: ADABIO CO., LTD., OTSUKA PHARMACEUTICAL FACTORY, INC.
    Inventors: Katsuya Hiraishi, Fumie Jimma, Hiroyuki Soma, Taro Adachi, Masakazu Adachi, Ippei Yamaoka, Tomohiro Kagawa
  • Patent number: 10566761
    Abstract: A semiconductor laser module includes a semiconductor laser that outputs laser light; an optical fiber that guides the laser light; a lens that couples the laser light, which is output from the semiconductor laser, with the optical fiber; a base that is substantially tabular in shape and that has the semiconductor laser, the optical fiber, and the lens fixed thereon either directly or indirectly; and a housing which houses the base and fixes the base either directly or indirectly. Among faces of the base, a face on a side that is fixed either directly or indirectly to the housing includes a junction plane that is joined to the housing either directly or indirectly, and a detachment plane that is detached to remain unfixed from the housing.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: February 18, 2020
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masakazu Miura, Jun Miyokawa, Kazuki Yamaoka, Toshio Kimura
  • Publication number: 20200039964
    Abstract: Compounds (citric acid derivatives) represented by formulas (1) and (2) below are novel compounds having an inhibitory effect against liver disorder and can be used as liver disorder inhibitors and food additives (wherein R1 represents a C1 to C3 alkyl group optionally having a carboxyl group or a hydroxyl group, and R2 represents a hydrogen atom, or R1 and R2 optionally form a cyclic structure together to represent a C2 to C3 alkylene chain).
    Type: Application
    Filed: October 15, 2019
    Publication date: February 6, 2020
    Applicants: ADABIO CO., LTD., OTSUKA PHARMACEUTICAL FACTORY, INC.
    Inventors: Katsuya HIRAISHI, Fumie JIMMA, Hiroyuki SOMA, Taro ADACHI, Masakazu ADACHI, Ippei YAMAOKA, Tomohiro KAGAWA
  • Patent number: 10551576
    Abstract: An optical fiber fixing structure includes: a cylindrical member; an optical fiber inserted into a hole of the cylindrical member; and a fixing material configured to fix the cylindrical member and the optical fiber, wherein the optical fiber is a polarization maintaining optical fiber having a polarization axis, and a center of the optical fiber is arranged so as to be eccentric to a center of the hole, and an angle formed by an eccentric direction connecting the center of the hole and the center of the optical fiber and the polarization axis is ?22.5° to 22.5°, or 67.5° to 112.5°.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: February 4, 2020
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kazuki Yamaoka, Jun Miyokawa, Masakazu Miura, Toshio Kimura
  • Publication number: 20190372303
    Abstract: Provided is a package for an optical device and an optical device module that can reduce or prevent damage occurrence in an optical fiber optically coupled to an optical device while ensuring a good airtightness. A package for an optical device includes a package main unit that accommodates an optical device; a pipe portion that is provided in the package main unit and through which an optical fiber optically coupled to the optical device is inserted; and a fixing portion that is provided in the package main unit and to which one end of the optical fiber is fixed, and the pipe portion includes a first pipe section having a base end fixed to the package main unit and a second pipe section joined to a tip of the first pipe section, having a higher thermal expansion coefficient than the first pipe section, to be sealed by a sealing material.
    Type: Application
    Filed: August 2, 2019
    Publication date: December 5, 2019
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Jun MIYOKAWA, Masakazu Miura, Kazuki Yamaoka
  • Patent number: 10494362
    Abstract: Compounds (citric acid derivatives) represented by formulas (1) and (2) below are novel compounds having an inhibitory effect against liver disorder and can be used as liver disorder inhibitors and food additives (wherein R1 represents a C1 to C3 alkyl group optionally having a carboxyl group or a hydroxyl group, and R2 represents a hydrogen atom, or R1 and R2 optionally form a cyclic structure together to represent a C2 to C3 alkylene chain).
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: December 3, 2019
    Assignees: ADABIO CO., LTD., OTSUKA PHARMACEUTICAL FACTORY, INC.
    Inventors: Katsuya Hiraishi, Fumie Jimma, Hiroyuki Soma, Taro Adachi, Masakazu Adachi, Ippei Yamaoka, Tomohiro Kagawa
  • Patent number: 10167860
    Abstract: A communication pipe outlet (263) of a suction muffler (26) included in a hermetic compressor (10) includes a communication opening (264). An upper shape (264a) of the communication opening (264) is a curved protruding shape, and a lower shape (264b) of the communication opening (264) is a rectangular shape. A suction hole (33) of a valve plate (30) included in the hermetic compressor (10) is formed such that the cylinder side of the suction hole (33) has a non-recessed closed-curve shape, and the communication pipe side of the suction hole (33) has a shape similar to that of the communication opening (264). The valve plate (30) and a communication pipe (262) are connected in a state where an upper peripheral surface of the communication opening (264) of the communication pipe outlet (263) corresponds to an upper peripheral surface of the suction hole (33).
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: January 1, 2019
    Assignee: PANASONIC APPLIANCES REFRIGERATION DEVICES SINGAPORE
    Inventor: Masakazu Yamaoka
  • Patent number: 9518571
    Abstract: A sealed compressor comprises an electric element; a compression element; and a sealed container accommodating the electric element and the compression element; wherein the compression element includes a cylinder block defining a compression chamber; a piston which is reciprocatable inside the compression chamber; and a valve plate disposed to close an opening end of the compression chamber and having a discharge hole which provides communication between inside and outside of the compression chamber; the piston has a first groove on a tip end surface thereof which faces the valve plate, the first groove having a predetermined width and extending from an outer peripheral edge portion of the tip end surface toward a portion of the tip end surface which faces the discharge hole; and a tip end portion of the first groove is positioned in the portion of the tip end surface which faces the discharge hole and is inclined.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: December 13, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masakazu Yamaoka, Yasushi Hayashi, Makoto Katayama
  • Publication number: 20150300340
    Abstract: A contact member or a slide member of the present invention comprises a surface treatment film (160) including two or more coating layers stacked together, in at least a portion of a contact surface or a slide surface thereof, wherein each of the coating layers includes synthetic resin and a solid lubricant, and wherein the solid lubricant (162) of the coating layer located at an innermost side is lower in content percentage than the solid lubricant of the coating layer located at an outermost side. A contact member or a slide member of the present invention comprises a surface treatment film (160) including two or more coating layers stacked together, in at least a portion of a contact surface or a slide surface thereof, each of the coating layers includes synthetic resin, and the coating layer located at an innermost side is larger in elastic deformation amount than the coating layer located at an outermost side.
    Type: Application
    Filed: December 11, 2013
    Publication date: October 22, 2015
    Inventors: Yoshinori ISHIDA, Yoshiyuki FUTAGAMI, Hiroyuki FUKUHARA, Hirotaka KAWABATA, Masakazu YAMAOKA
  • Publication number: 20150300341
    Abstract: A compressor of the present invention comprises a cylinder (114) which accommodates a reciprocatable piston (116) therein; a valve plate (117) placed at an opening end of the cylinder (114) and includes a discharge valve seat (142) provided to surround a discharge hole (119); and a discharge valve (121) which opens and closes the discharge hole (119), wherein at least one of the discharge valve seat (142) and the discharge valve (121) is provided with a surface treatment film (160) including synthetic resin (171).
    Type: Application
    Filed: December 11, 2013
    Publication date: October 22, 2015
    Inventors: Yoshiyuki FUTAGAMI, Yoshinori ISHIDA, Hiroyuki FUKUHARA, Hirotaka KAWABATA, Masakazu YAMAOKA
  • Publication number: 20150219085
    Abstract: A communication pipe outlet (263) of a suction muffler (26) included in a hermetic compressor (10) includes a communication opening (264). An upper shape (264a) of the communication opening (264) is a curved protruding shape, and a lower shape (264b) of the communication opening (264) is a rectangular shape. A suction hole (33) of a valve plate (30) included in the hermetic compressor (10) is formed such that the cylinder side of the suction hole (33) has a non-recessed closed-curve shape, and the communication pipe side of the suction hole (33) has a shape similar to that of the communication opening (264). The valve plate (30) and a communication pipe (262) are connected in a state where an upper peripheral surface of the communication opening (264) of the communication pipe outlet (263) corresponds to an upper peripheral surface of the suction hole (33).
    Type: Application
    Filed: December 13, 2013
    Publication date: August 6, 2015
    Inventor: Masakazu Yamaoka
  • Patent number: 8517697
    Abstract: There is disclosed a sealed compressor in which a compressive component housed inside of a sealed container comprises a block, a suction valve, a piston, and a suction muffler, the suction muffler including a muffler body defining a muffler space and an outlet tube communicating the muffler space with the suction valve, the outlet tube having a bent portion bent in a middle portion between an opening exposed to the muffler space and an opening in a vicinity of the suction valve, a first outlet tube portion extending from the bent portion toward the muffler space, and a second outlet tube portion extending from the bent portion toward the suction valve, wherein a close sided space is formed in a vicinity of the bent portion, the close sided space having one end in communication with the outlet tube and the other end closed.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: August 27, 2013
    Assignee: Panasonic Corporation
    Inventors: Kenji Kinjo, Ko Inagaki, Masakazu Yamaoka
  • Publication number: 20120288382
    Abstract: A sealed compressor comprises an electric element; a compression element; and a sealed container accommodating the electric element and the compression element; wherein the compression element includes a cylinder block defining a compression chamber; a piston which is reciprocatable inside the compression chamber; and a valve plate disposed to close an opening end of the compression chamber and having a discharge hole which provides communication between inside and outside of the compression chamber; the piston has a first groove on a tip end surface thereof which faces the valve plate, the first groove having a predetermined width and extending from an outer peripheral edge portion of the tip end surface toward a portion of the tip end surface which faces the discharge hole; and a tip end portion of the first groove is positioned in the portion of the tip end surface which faces the discharge hole and is inclined.
    Type: Application
    Filed: April 30, 2012
    Publication date: November 15, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Masakazu YAMAOKA, Yasushi HAYASHI, Makoto KATAYAMA
  • Publication number: 20110271709
    Abstract: There is disclosed a sealed compressor in which a compressive component housed inside of a sealed container comprises a block, a suction valve, a piston, and a suction muffler, the suction muffler including a muffler body defining a muffler space and an outlet tube communicating the muffler space with the suction valve, the outlet tube having a bent portion bent in a middle portion between an opening exposed to the muffler space and an opening in a vicinity of the suction valve, a first outlet tube portion extending from the bent portion toward the muffler space, and a second outlet tube portion extending from the bent portion toward the suction valve, wherein a close sided space is formed in a vicinity of the bent portion, the close sided space having one end in communication with the outlet tube and the other end closed.
    Type: Application
    Filed: February 9, 2010
    Publication date: November 10, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Kenji Kinjo, Ko Inagaki, Masakazu Yamaoka
  • Publication number: 20090291007
    Abstract: In a stopper, by providing, in a position corresponding to a movable end vicinity of a discharge reed, a first regulation part having a predetermined clearance from the movable end vicinity of the discharge reed, since a hermetic compressor has such a two-stage spring characteristic that, until the movable end vicinity of the discharge reed touches the first regulation part, a spring characteristic is weak and, after the touch, the spring characteristic is strong, and there is obtained a discharge valve device which is easy to open and whose closing speed is rapid, it is possible to improve a delay in closing.
    Type: Application
    Filed: April 24, 2007
    Publication date: November 26, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Masakazu Yamaoka, Akio Yagi, Tsuyoshi Matsumoto
  • Publication number: 20090116985
    Abstract: A hermetic compressor including a discharge valve system in a cylinder. A discharge valve system includes a discharge reed having an opening/closing portion and a discharge reed holding portion, a spring reed having a movable portion and a spring reed holding portion, and a stopper having a regulation portion and a stopper holding portion. The discharge reed, the spring reed and the stopper are fixed in this order to a pedestal of a valve plate. At a spring reed bending portion provided in a movable portion, the movable portion is bent toward the direction of the valve seat and the tip portion is brought into contact with the plate contact portion. Space is provided between the movable portion of the spring reed and the opening/closing portion of the discharge reed, and both are not brought into close contact with each other. Thus, delay in closing discharge reed can be prevented and deterioration of the refrigerating capacity can be suppressed.
    Type: Application
    Filed: December 8, 2005
    Publication date: May 7, 2009
    Inventors: Tsuyoshi Matsumoto, Terumasa Ide, Tomio Maruyama, Masakazu Yamaoka
  • Publication number: 20090010788
    Abstract: Stopper contains abutment section at a position that corresponds to arm section so as to keep a clearance from arm section of discharge reed. The structure above allows discharge reed to have two-stage spring characteristics; discharge reed exhibits a weaker springiness until arm section abuts against abutment section, and then exhibits a stronger springiness after the abutment. Employing the discharge reed having the two-stage characteristics allows discharge valve unit to easily open and quickly close without delay. Such structured hermetic compressor enhances energy efficiency, preventing degradation in refrigeration performance.
    Type: Application
    Filed: September 20, 2006
    Publication date: January 8, 2009
    Inventors: Masakazu Yamaoka, Akio Yagi, Tsuyoshi Matsumoto
  • Publication number: 20080202613
    Abstract: A hermetic compressor that has a pedestal of the valve plate to which a discharge reed equipped with an opening/closing part and discharge reed holding part, a spring reed equipped with a movable part and spring reed holding part, and a stopper equipped with a regulation part and stopper holding part, are fixed in this sequence, and also has a discharge valve device in which the spring reed is shaped in a substantially crank-like form is provided. A space is formed between the movable part of the spring reed and the opening/closing part of the discharge reed, and both are not adsorbed each other, thus preventing a delay in closing of the discharge reed. This makeup suppresses a decrease in freezing capacity of a fridge-freezer device and the like, thus implementing higher efficiency.
    Type: Application
    Filed: March 11, 2005
    Publication date: August 28, 2008
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Masakazu Yamaoka, Tsuyoshi Matsumoto, Terumasa Ide, Tomio Maruyama
  • Patent number: 7030085
    Abstract: A microorganism belonging to the genus Bacillus is cultured and thiopeptide compounds QN3323 and thiocillin I/II compounds are collected from the culture medium. The compounds are useful as drugs to treat infections caused by multidrug-resistant bacteria.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: April 18, 2006
    Assignees: Astellas Pharma INC, National Institute of Advanced Industrial Science and Technology
    Inventors: Kazuma Kamigiri, Masato Watanabe, Koji Nagai, Nakako Arao, Kenichi Suzumura, Ken-ichi Suzuki, Ryuichiro Kurane, Masakazu Yamaoka, Yasuhiro Kawano