Patents by Inventor Koji Miyake

Koji Miyake 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: 9926449
    Abstract: A water-absorbent resin composition is provided which shows only small reduction in liquid permeability and limited coloring over time or in relation to another factor. The water-absorbent resin composition (particulate absorbent agent) of the present invention contains: a polycarboxylate-based water-absorbent resin as a primary component, the resin having a crosslinked structure formed by polymerization of an acid group-containing unsaturated monomer; and multivalent metal cations (preferably, on surfaces of particles (i.e., the water-absorbent resin composition)) wherein: the multivalent metal cations other than Fe cations account for 0.001 to 1 mass % of the water-absorbent resin; and the ratio (in terms of percentage) of the Fe cations to the multivalent metal cations other than the Fe cations is less than or equal to 5.00 mass %.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: March 27, 2018
    Assignee: NIPPON SHOKUBAI CO., LTD.
    Inventors: Masatoshi Nakamura, Koji Miyake, Taku Iwamura, Yusuke Watanabe
  • Patent number: 9803155
    Abstract: Disclosed is a lubricating oil composition for low-friction sliding materials, which is used in a sliding mechanism where a DLC film containing hydrogen in an amount of from 5 atom % to 50 atom % is formed on at least one sliding surface. The lubricating oil composition contains, in the lubricant base oil therein and based on the total amount of the composition, (A) an organic zinc dithiophosphate in an amount of from 0.005% by mass to 0.12% by mass in terms of the phosphorus concentration therein, (B) an amine-based friction-reducing agent in an amount of from 0.05% by mass to 5.0% by mass, and (C) an alkaline earth metal salicylate-based detergent and/or an alkaline earth metal sulfonate-based detergent in an amount of from 0.05% by mass to 0.5% by mass in terms of the alkaline earth metal concentration therein, wherein the component (A) contains, based on the total amount of the composition, a zinc primary dialkyldithiophosphate in an amount of from 0.005% by mass to 0.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: October 31, 2017
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Hiroaki Koshima, Moritsugu Kasai, Yoko Ogahara, Masanori Tsujioka, Koji Miyake
  • Patent number: 9765810
    Abstract: Provided is a technique whereby a DLC film having a desired surface roughness and a desired film hardness can be easily formed within a short period of time while preventing cost increase so that a large quantity of boll joints, which are less expensive and yet have stable sliding characteristics, can be supplied. A method for manufacturing a ball joint provided with a ball stud that has a spherical surface section and a holder section that pivotally holds the spherical surface section, said method comprising: an intermediate underlayer-forming step for forming an intermediate underlayer, that has a fine irregular surface structure, on the surface of the spherical surface section using a sputtering method; and an amorphous hard carbon film-forming step for forming an amorphous hard carbon film, that has a root mean square roughness on the surface of 6.5-35 nm, on the intermediate underlayer using a PIG plasma film formation method.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: September 19, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Koji Miyake, Ryohei Nishiumi, Kentaro Komori
  • Publication number: 20170167608
    Abstract: Provided are a piston ring which, even when a sleeve constituted of an aluminum alloy is used, can sufficiently show the required low frictional properties, wear resistance, and low counterpart-material attacking properties, and a process for producing the piston ring. The piston ring has a rigid carbon film formed as the outermost layer thereof and serving as a sliding surface with a sleeve constituted of an aluminum alloy, wherein the rigid carbon film gives an X-ray diffraction pattern that has peaks assigned to graphite crystals. The rigid carbon film of the piston ring is formed using a chemical vapor deposition method. The rigid carbon film of the piston ring has a hydrogen content which is at least 20 atm % but lower than 30 atm %, and gives a Raman spectrum in which the ratio of the area (ID) of D-band peaks to the area (IG) of G-band peaks, ID/IG, is 0.5-2.0.
    Type: Application
    Filed: February 13, 2014
    Publication date: June 15, 2017
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Takehiko OOSHIRO, Koji MIYAKE, Satoshi YOSHIDA, Eishi FUJIMAGARI, Takeyuki YAMASAKI, Hidetoshi CHIBA
  • Patent number: 9662845
    Abstract: A method for manufacturing an optical element, the method including: heating an optical element material by suspending it in a gas; supplying the heated optical element material from a direction which intersects a central axis interconnecting centers of a first mold and a second mold to a space between molds in a non-contact state, the space between molds being a space between the first mold and the second mold; pressurizing the optical element material supplied to the space between molds by the first mold and the second mold; and cooling the pressurized optical element material.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: May 30, 2017
    Assignee: Olympus Corporation
    Inventors: Yusuke Nakagawa, Daigo Hirata, Koji Miyake, Masato Nakahama, Hiroyuki Seki
  • Patent number: 9593291
    Abstract: Disclosed is a lubricating oil composition for low-friction sliding materials, which is used in a sliding mechanism where a DLC film containing hydrogen in an amount of from 5 atom % to 50 atom % is formed on at least one sliding surface. The lubricating oil composition contains, in the lubricant base oil therein and based on the total amount of the composition, (A) an organic zinc dithiophosphate in an amount of from 0.005% by mass to 0.12% by mass in terms of the phosphorus concentration therein, (B) an amide-based friction-reducing agent in an amount of from 0.05% by mass to 5.0% by mass, and (C) an alkaline earth metal salicylate-based detergent and/or an alkaline earth metal sulfonate-based detergent in an amount of from 0.05% by mass to 0.5% by mass in terms of the alkaline earth metal concentration therein.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: March 14, 2017
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoko Ogahara, Moritsugu Kasai, Hiroaki Koshima, Masanori Tsujioka, Koji Miyake
  • Publication number: 20160069383
    Abstract: Provided is a technique whereby a DLC film having a desired surface roughness and a desired film hardness can be easily formed within a short period of time while preventing cost increase so that a large quantity of boll joints, which are less expensive and yet have stable sliding characteristics, can be supplied. A method for manufacturing a ball joint provided with a ball stud that has a spherical surface section and a holder section that pivotally holds the spherical surface section, said method comprising: an intermediate underlayer-forming step for forming an intermediate underlayer, that has a fine irregular surface structure, on the surface of the spherical surface section using a sputtering method; and an amorphous hard carbon film-forming step for forming an amorphous hard carbon film, that has a root mean square roughness on the surface of 6.5-35 nm, on the intermediate underlayer using a PIG plasma film formation method.
    Type: Application
    Filed: March 3, 2014
    Publication date: March 10, 2016
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Koji MIYAKE, Ryohei NISHIUMI, Kentaro KOMORI
  • Publication number: 20150080277
    Abstract: Disclosed is a lubricating oil composition for low-friction sliding materials, which is used in a sliding mechanism where a DLC film containing hydrogen in an amount of from 5 atom % to 50 atom % is formed on at least one sliding surface. The lubricating oil composition contains, in the lubricant base oil therein and based on the total amount of the composition, (A) an organic zinc dithiophosphate in an amount of from 0.005% by mass to 0.12% by mass in terms of the phosphorus concentration therein, (B) an amine-based friction-reducing agent in an amount of from 0.05% by mass to 5.0% by mass, and (C) an alkaline earth metal salicylate-based detergent and/or an alkaline earth metal sulfonate-based detergent in an amount of from 0.05% by mass to 0.5% by mass in terms of the alkaline earth metal concentration therein, wherein the component (A) contains, based on the total amount of the composition, a zinc primary dialkyldithiophosphate in an amount of from 0.005% by mass to 0.
    Type: Application
    Filed: March 18, 2013
    Publication date: March 19, 2015
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Hiroaki Koshima, Moritsugu Kasai, Yoko Ogahara, Masanori Tsujioka, Koji Miyake
  • Publication number: 20150036962
    Abstract: Disclosed is a lubricating oil composition for low-friction sliding materials, which is used in a sliding mechanism where a DLC film containing hydrogen in an amount of from 5 atom % to 50 atom % is formed on at least one sliding surface. The lubricating oil composition contains, in the lubricant base oil therein and based on the total amount of the composition, (A) an organic zinc dithiophosphate in an amount of from 0.005% by mass to 0.12% by mass in terms of the phosphorus concentration therein, (B) an amide-based friction-reducing agent in an amount of from 0.05% by mass to 5.0% by mass, and (C) an alkaline earth metal salicylate-based detergent and/or an alkaline earth metal sulfonate-based detergent in an amount of from 0.05% by mass to 0.5% by mass in terms of the alkaline earth metal concentration therein.
    Type: Application
    Filed: March 18, 2013
    Publication date: February 5, 2015
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoko Ogahara, Moritsugu Kasai, Hiroaki Koshima, Masanori Tsujioka, Koji Miyake
  • Patent number: 8948646
    Abstract: An electrophotographic image forming apparatus includes a photoreceptor forming an electrostatic latent image on a surface thereof, a charging roller being in contact with the photoreceptor to uniformly charge the surface thereof, a developing device forming a toner image on the photoreceptor, and a cleaning device cleaning contaminants on a surface of the charging roller, in which the charging roller has a conductive elastic layer formed around an axis and a direction of polishing marks on the surface of the charging roller is in a circumferential direction.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: February 3, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Koji Miyake, Takayuki Wakai
  • Patent number: 8917477
    Abstract: According to one embodiment, a disk device includes a disk recording medium, a drive motor configured to support and rotate a recording medium, a suspension assembly which supports a head, a housing containing the recording medium, the drive motor and the suspension assembly, a filter in the housing, opposite to part of an outer peripheral edge of the recording medium, and through which an airflow generated by rotation of the recording medium flows, an exhaust hole formed at the housing and located opposite to an upstream side of the filter with respect to the airflow, and an air-intake formed at the housing and located opposite to a region of the housing, whose pressure is lower than the pressure of the upstream side of the filter.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: December 23, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Miyake, Takahiro Imamura, Shinichi Kobatake
  • Patent number: 8846823
    Abstract: A water absorbing agent and a method for producing the water absorbing agent are disclosed. Water absorbent resin particles having an internal cross-linked structure obtained by polymerizing a water-soluble unsaturated monomer, organic acid, and water-soluble multivalent metal salt are mixed, so that it is possible to provide a water absorbing agent which suppresses permeation of metal components into the water absorbent resin particles and enables the metal components to evenly adhere to an entire surface of the water absorbent resin in a dot manner.
    Type: Grant
    Filed: April 28, 2005
    Date of Patent: September 30, 2014
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Masatoshi Nakamura, Koji Miyake, Hirofumi Shibata
  • Patent number: 8805245
    Abstract: A roll-type charging device contacts an image receptor serving as a body to be charged and is capable of rotating due to rotation of the image receptor. The apparatus includes a hollow roll having a cylindrical shape and formed of a hollow elastic member and flanges having rotation axes and formed of elastic members, the flanges inserted into two ends of the hollow roll to increase an inner diameter of the hollow roll.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: August 12, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Koji Miyake
  • Publication number: 20140217627
    Abstract: A method for manufacturing an optical element, the method including: heating an optical element material by suspending it in a gas; supplying the heated optical element material from a direction which intersects a central axis interconnecting centers of a first mold and a second mold to a space between molds in a non-contact state, the space between molds being a space between the first mold and the second mold; pressurizing the optical element material supplied to the space between molds by the first mold and the second mold; and cooling the pressurized optical element material.
    Type: Application
    Filed: April 4, 2014
    Publication date: August 7, 2014
    Applicant: Olympus Corporation
    Inventors: Yusuke Nakagawa, Daigo Hirata, Koji Miyake, Masato Nakahama, Hiroyuki Seki
  • Patent number: 8526139
    Abstract: A magnetic head and a magnetic disk drive using the same is disclosed. The head is capable of increasing efficiency in changing the flying height of an element portion by heat generation of a heater in the magnetic head using the heater as well as capable of suppressing the change of the flying height of the element portion at the time of recording.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: September 3, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Koji Miyake, Hidekazu Kohira, Kiyoshi Hashimoto, Takanori Yamazaki, Hideaki Tanaka
  • Publication number: 20130129264
    Abstract: A lubricant oil composition containing an organic molybdenum compound which contains at least either one of a nitrogen (N) atom and an oxygen (O) atom in the molecule thereof and which may optionally contain a sulfur (S) atom, wherein a sulfur content of the organic molybdenum compound is 0.5% by mass or less based on the organic molybdenum compound. The lubricant oil composition, when used as a lubricant oil for a low-friction sliding material, exhibits an extremely low friction coefficient. A sliding mechanism having excellent low-friction property and wear resistance can be provided by combining the lubricant oil composition and a sliding member having a DLC film on its sliding face.
    Type: Application
    Filed: June 1, 2011
    Publication date: May 23, 2013
    Applicants: NIPPON ITF, INC., IDEMITSU KOSAN CO., LTD.
    Inventors: Nobuaki Watanabe, Masashi Kaji, Masanori Tsujioka, Koji Miyake
  • Patent number: 8309654
    Abstract: A method of producing a particle-shape water-absorbing resin material is realized. With this method, it is possible to prevent deterioration of properties of the particle-shape water-absorbing resin material, and reduces damages onto surfaces thereof. This method is arranged such that (a) water-absorbing resin particles are surface-treated by using a crossing agent so that surfaces of the particles are cross-linked, (b) an additive for giving a function to the particles is added to the particles, (c) and a step of mixing the particles and the additive is carried out in a step of performing particle-size regulating treatment for the particles which includes agglomerated particles.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: November 13, 2012
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Koji Miyake, Takahiro Kitano, Kunihiko Ishizaki
  • Patent number: 8247491
    Abstract: There are disclosed a water-absorbent resin composition and its production process, wherein the water-absorbent resin composition causes little gel-blocking and is excellent in the liquid permeability and liquid diffusibility and is high also in the absorption performances and further is strong also against the physical damage; and there are further disclosed a water-absorbent resin composition and its production process, wherein the water-absorbent resin composition has the following further advantages, in addition to the above, of involving little segregation of the metal compound and further having a dust prevention effect.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: August 21, 2012
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Kazushi Torii, Yoshiro Mitsukami, Motohiro Imura, Taku Iwamura, Toshimasa Kitayama, Kenji Kadonaga, Hiroki Inoue, Koji Miyake, Kozo Nogi, Masatoshi Nakamura, Shigeru Sakamoto, Sayaka Machida
  • Publication number: 20120177915
    Abstract: Provided by the present invention is a lubricating oil composition showing a very low frictional coefficient when used as a lubricating oil for a low friction sliding material prepared by blending with an additive selected from a specific phosphorus-zinc-containing compound and a specific sulfur-containing compound, and a sliding mechanism having an excellent low frictional property in which a DLC film containing 5 to 50 atom % of hydrogen is formed or a sliding mechanism having an excellent low frictional property in which 1 to 30 atom % of tungsten (W) or molybdenum (Mo) is contained is provided by combining the above lubricating oil composition with a sliding member having a film of a specific low frictional sliding material on a sliding face.
    Type: Application
    Filed: September 13, 2010
    Publication date: July 12, 2012
    Applicants: NIPPON ITF INC., IDEMITSU KOSAN CO., LTD.
    Inventors: Moritsugu Kasai, Ryou Yamada, Masanori Tsujioka, Koji Miyake
  • Publication number: 20120172266
    Abstract: Provided by the present invention is a lubricating oil composition showing, though containing ZnDTP as an abrasion resistant agent, a low friction coefficient when used as a lubricating oil for a low friction sliding material, that is, a specific lubricating oil composition which is prepared by blending a lubricant base oil with (A) a specific alkali earth metal-containing cleaning agent, (B) a specific boron-non-containing succinimide base ashless dispersant, (C) a zinc dialkyldithiophosphate and (D) a specific sulfur base compound and which is used for a low friction sliding material.
    Type: Application
    Filed: September 3, 2010
    Publication date: July 5, 2012
    Applicants: NIPPON ITF INC., IDEMITSU KOSAN CO., LTD.
    Inventors: Moritsugu Kasai, Ryou Yamada, Masanori Tsujioka, Koji Miyake