Patents by Inventor Kentaro Okubo

Kentaro Okubo 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: 11938728
    Abstract: A liquid ejecting head includes: head chips including a first-head-chip and a second-head-chip; a holder holding the head chips; and a heater along a direction parallel to a nozzle surface. The first-head-chip and the second-head-chip are disposed to be offset from each other in both a first-direction and a second-direction parallel to the nozzle surface and intersecting with each other. When a first-side is one of the four sides of a virtual rectangle circumscribing the aggregate of the head chips and a second-side and a third-side are coupled to both ends of the first-side, the first-head-chip is in contact with the first-side and the third-side and the second-head chip is in contact with the second-side. The heater overlaps the head chips. A first-region surrounded by the first-side, the second-side, the first-head-chip, and the second-head-chip includes a first-outside-part positioned outside the outer edge of the heater.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: March 26, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takahiro Kanegae, Katsuhiro Okubo, Kentaro Murakami, Shingo Tomimatsu, Hiroki Kobayashi, Haruhisa Uezawa
  • Patent number: 11938732
    Abstract: A liquid ejecting head supported by a support body includes: a first head chip; a holder having a holding portion holding the first head chip and a flange portion; and a heater heating the holding portion, in which the holding portion has a heat receiving portion receiving heat from the heater, and a shortest path of heat transferred through the holder from the heat receiving portion to the flange portion is bent or curved at two or more points.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: March 26, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Katsuhiro Okubo, Takahiro Kanegae, Kentaro Murakami, Shingo Tomimatsu, Hiroki Kobayashi, Haruhisa Uezawa
  • Patent number: 10767695
    Abstract: A sliding contact surface-forming material with improved friction-proof and wear-proof characteristics under dry friction conditions such as in the open air, while keeping the low swelling, friction-proof, and wear-proof characteristics under moist atmosphere typically under water unchanged, wherein the sliding contact surface-forming material includes a reinforcing base impregnated with a resol-type phenolic resin having polytetrafluoroethylene resin dispersed therein, the reinforcing base being composed of a woven fabric formed by using, respectively as the warp and the weft, a ply yarn which is formed by paralleling at least two strands of a single twist yarn spun from fluorine-containing resin fiber and a single twist yarn spun from polyphenylene sulfide fiber, and by twisting them in the direction opposite to the direction in which the single twist yarns were spun.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: September 8, 2020
    Assignee: Oiles Corporation
    Inventors: Hiroyuki Ogoe, Shinya Nishimura, Kentaro Okubo
  • Patent number: 10767697
    Abstract: A sliding contact surface-forming material, and method of making the material are disclosed, the material having minimal swelling and excellent friction-proof and wear-proof characteristics when used in moist environments such as in water, and improved in the friction-proof and wear-proof characteristics under dry friction conditions such as in the open air, particularly under oscillation conditions for testing journal. The material includes a reinforcing base impregnated with a resol-type phenolic resin having polytetrafluoroethylene resin dispersed therein. The reinforcing base is composed of a woven fabric formed by using, as each of the warp and the weft, a ply yarn which is formed by paralleling at least two strands of a single twist yarn spun from fluorine-containing resin fiber and a single twist yarn spun from polyester fiber, and by twisting them in the direction opposite to the direction in which the single twist yarns were spun.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: September 8, 2020
    Assignee: Oiles Corporation
    Inventors: Hiroyuki Ogoe, Shinya Nishimura, Kentaro Okubo
  • Patent number: 10267361
    Abstract: A sliding contact surface-forming material includes a reinforcing base impregnated with a resol-type phenolic resin having polytetrafluoroethylene resin dispersed therein. The reinforcing base is composed of a woven fabric formed by using, respectively as the warp and the weft, a ply yarn which is formed by paralleling at least two strands of a single twist yarn spun from fluorine-containing resin fiber and a single twist yarn spun from polyphenylene sulfide fiber, and by twisting them in the direction opposite to the direction in which the single twist yarns were spun. Also, a multi-layered sliding contact component having the overall shape of a flat plate or a circular cylinder includes the sliding contact surface-forming material so as to configure at least the sliding-contact surface thereof.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: April 23, 2019
    Assignee: Oiles Corporation
    Inventors: Hiroyuki Ogoe, Shinya Nishimura, Kentaro Okubo
  • Patent number: 10267362
    Abstract: A sliding contact surface-forming material includes a reinforcing base impregnated with a resol-type phenolic resin having polytetrafluoroethylene resin dispersed therein. The reinforcing base being composed of a woven fabric formed by using, respectively as the warp and the weft, a ply yarn which is formed by paralleling at least two strands of a single twist yarn spun from fluorine-containing resin fiber and a single twist yarn spun from polyester fiber, and by twisting them in the direction opposite to the direction in which the single twist yarns were spun. Additionally, a multi-layered sliding contact component having the overall shape of a flat plate or a circular cylinder includes the above-described sliding contact surface-forming material so as to configure at least the sliding-contact surface thereof.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: April 23, 2019
    Assignee: Oiles Corporation
    Inventors: Hiroyuki Ogoe, Shinya Nishimura, Kentaro Okubo
  • Publication number: 20180335083
    Abstract: A sliding contact surface-forming material, and method of making the material are disclosed, the material having minimal swelling and excellent friction-proof and wear-proof characteristics when used in moist environments such as in water, and improved in the friction-proof and wear-proof characteristics under dry friction conditions such as in the open air, particularly under oscillation conditions for testing journal. The material includes a reinforcing base impregnated with a resol-type phenolic resin having polytetrafluoroethylene resin dispersed therein. The reinforcing base is composed of a woven fabric formed by using, as each of the warp and the weft, a ply yarn which is formed by paralleling at least two strands of a single twist yarn spun from fluorine-containing resin fiber and a single twist yarn spun from polyester fiber, and by twisting them in the direction opposite to the direction in which the single twist yarns were spun.
    Type: Application
    Filed: July 31, 2018
    Publication date: November 22, 2018
    Inventors: Hiroyuki OGOE, Shinya NISHIMURA, Kentaro OKUBO
  • Publication number: 20180335081
    Abstract: A sliding contact surface-forming material with improved friction-proof and wear-proof characteristics under dry friction conditions such as in the open air, while keeping the low swelling, friction-proof, and wear-proof characteristics under moist atmosphere typically under water unchanged, wherein the sliding contact surface-forming material includes a reinforcing base impregnated with a resol-type phenolic resin having polytetrafluoroethylene resin dispersed therein, the reinforcing base being composed of a woven fabric formed by using, respectively as the warp and the weft, a ply yarn which is formed by paralleling at least two strands of a single twist yarn spun from fluorine-containing resin fiber and a single twist yarn spun from polyphenylene sulfide fiber, and by twisting them in the direction opposite to the direction in which the single twist yarns were spun.
    Type: Application
    Filed: July 31, 2018
    Publication date: November 22, 2018
    Inventors: Hiroyuki OGOE, Shinya NISHIMURA, Kentaro OKUBO
  • Patent number: 9738846
    Abstract: Provided are: a solid lubricant having a low friction coefficient and excellent abrasion resistance; and a sliding member having this solid lubricant embedded therein. The solid lubricant (4) has a sea-island structure, comprising: a sea phase as a continuous phase, containing a hydrocarbon-based wax and a polyethylene resin; and an island phase as a dispersion phase, containing a low-molecular weight tetrafluoroethylene resin, a higher fatty acid salt, a phosphate of basic nitrogen-containing compound, and zinc stannate. A high-molecular weight tetrafluoroethylene resin is contained in this continuous-phase sea phase in a fibrous and mesh state. The hydrocarbon-based wax content is 30-60 vol %, the polyethylene resin content is 3-10 vol %, the low-molecular weight tetrafluoroethylene resin content is 10-30% vol %, the higher fatty acid salt content is 20-40% vol %, the basic nitrogen-containing compound phosphate content is 0.5-5 vol %, the zinc stannate content is 0.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: August 22, 2017
    Assignee: OILES CORPORATION
    Inventors: Yoshiaki Yamamoto, Kentaro Okubo
  • Patent number: 9568047
    Abstract: High-strength brass alloy having superior wear maintains single-structure ? phase and Fe—Cr—Si-based intermetallic compounds dispersed in the ? phase. A high-strength brass alloy for sliding member comprises Zn from 17% to 28%, Al from 3% to 10%, Fe from 1% to 4%, Cr from 0.1% to 4%, Si from 0.5% to 3%, mass ratio, and the remnant including Cu and inevitable impurities. The high-strength brass alloy has structure in which the matrix shows single-phase structure of ? phase and Fe—Cr—Si-based intermetallic compounds are dispersed in the ? phase. The high-strength brass alloy for sliding member has the structure in which the matrix shows single-structure of ? phase and hard Fe—Cr—Si-based intermetallic compounds are dispersed in the ? phase. Thus the hardness is increased and wear resistance is improved.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: February 14, 2017
    Assignee: OILES CORPORATION
    Inventors: Maki Hirayama, Taku Watakabe, Kentaro Okubo
  • Publication number: 20150219156
    Abstract: Provided are a multilayer sliding member capable of being efficiently manufactured at a low cost and having little dimensional change with respect to being used with high loads, and manufacturing technology for same. A binder (5) is applied to a surface (21) of a metal plate (2) that is the backing material. Furthermore, a prepreg (3), formed by drying a woven cloth after the same is impregnated with a phenolic resin, is layered thereupon, and a sliding layer that was forcibly plastically deformed is formed on the surface (21) of the metal plate (2) by thermal curing the layered body while applying pressure with a force greater than the maximum anticipated load during use. A metal powder sintered layer (4) may also be formed on the surface (21) of the metal plate (2). Here, a thermosetting resin (such as a low-viscosity phenolic resin, or an epoxy resin) having a low viscosity and a high affinity with the phenolic resin used in the prepreg (3) is used in the binder (5).
    Type: Application
    Filed: September 27, 2013
    Publication date: August 6, 2015
    Applicant: OILES CORPORATION
    Inventor: Kentaro Okubo
  • Publication number: 20150159694
    Abstract: High-strength brass having superior wear maintains single-structure ? phase and Fe—Cr—Si-based intermetallic compounds dispersed in the ? phase. A high-strength brass alloy for sliding member comprises Zn from 17% to 28%, Al from 3% to 10%, Fe from 1% to 4%, Cr from 0.1% to 4%, Si from 0.5% to 3%, mass ratio, and the remnant including Cu and inevitable impurities. The high-strength brass alloy has structure in which the matrix shows single-phase structure of ? phase and Fe—Cr—Si-based intermetallic compounds are dispersed in the ? phase. The high-strength brass alloy for sliding member has the structure in which the matrix shows single-structure of ? phase and hard Fe—Cr—Si-based intermetallic compounds are dispersed in the ? phase. Thus the hardness is increased and wear resistance is improved.
    Type: Application
    Filed: November 21, 2014
    Publication date: June 11, 2015
    Inventors: Maki HIRAYAMA, Taku WATAKABE, Kentaro OKUBO
  • Publication number: 20150133350
    Abstract: Provided are: a solid lubricant having a low friction coefficient and excellent abrasion resistance; and a sliding member having this solid lubricant embedded therein. The solid lubricant (4) has a sea-island structure, comprising: a sea phase as a continuous phase, containing a hydrocarbon-based wax and a polyethylene resin; and an island phase as a dispersion phase, containing a low-molecular weight tetrafluoroethylene resin, a higher fatty acid salt, a phosphate of basic nitrogen-containing compound, and zinc stannate. A high-molecular weight tetrafluoroethylene resin is contained in this continuous-phase sea phase in a fibrous and mesh state. The hydrocarbon-based wax content is 30-60 vol %, the polyethylene resin content is 3-10 vol %, the low-molecular weight tetrafluoroethylene resin content is 10-30% vol %, the higher fatty acid salt content is 20-40% vol %, the basic nitrogen-containing compound phosphate content is 0.5-5 vol %, the zinc stannate content is 0.
    Type: Application
    Filed: April 10, 2013
    Publication date: May 14, 2015
    Inventors: Yoshiaki Yamamoto, Kentaro Okubo
  • Patent number: 8950941
    Abstract: High-strength brass alloy having superior wear maintains single-structure ? phase and Fe-Cr-Si-based intermetallic compounds dispersed in the ? phase. A high-strength brass alloy for sliding member comprises, Zn from 17% to 28%, Al from 3% to 10%, Fe from 1% to 4%, Cr from 0.1% to 4%, Si from 0.5% to 3%, mass ratio, and the remnant including Cu and inevitable impurities. The high-strength brass alloy has structure in which the matrix shows single-phase structure of ? phase and Fe-Cr-Si-based intermetallic compounds are dispersed in the ? phase. The high-strength brass alloy for sliding member has the structure in which the matrix shows single-structure of ? phase and hard Fe-Cr-Si-based intermetallic compounds are dispersed in the ? phase. Thus the hardness is increased and wear resistance is improved.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: February 10, 2015
    Assignee: Oiles Corporation
    Inventors: Maki Hirayama, Taku Watakabe, Kentaro Okubo
  • Publication number: 20130058605
    Abstract: High-strength brass alloy having superior wear maintains single-structure ? phase and Fe—Cr—Si-based intermetallic compounds dispersed in the ? phase. A high-strength brass alloy for sliding member comprises Zn from 17% to 28% Al from 3% to 10%, Fe from 1% to 4%, Cr from 0.1% to 4%, Si from 0.5% to 3%, mass ratio, and the remnant including Cu and inevitable impurities. The high-strength brass alloy has structure in which the matrix shows single-phase structure of ? phase and Fe—Cr—Si-based intermetallic compounds are dispersed in the ? phase. The high-strength brass alloy for sliding member has the structure in which the matrix shows single-structure of ? phase and hard Fe—Cr—Si-based intermetallic compounds are dispersed in the ? phase. Thus the hardness is increased and wear resistance is improved.
    Type: Application
    Filed: May 21, 2010
    Publication date: March 7, 2013
    Applicant: OILES CORPOLATION
    Inventors: Maki Hirayama, Taku Watakabe, Kentaro Okubo
  • Publication number: 20120178327
    Abstract: A sliding contact surface-forming material includes a reinforcing base impregnated with a resol-type phenolic resin having polytetrafluoroethylene resin dispersed therein. The reinforcing base being composed of a woven fabric formed by using, respectively as the warp and the weft, a ply yarn which is formed by paralleling at least two strands of a single twist yarn spun from fluorine-containing resin fiber and a single twist yarn spun from polyester fiber, and by twisting them in the direction opposite to the direction in which the single twist yarns were spun Additionally, a multi-layered sliding contact component having the overall shape of a flat plate or a circular cylinder includes the above-described sliding contact surface-forming material so as to configure at least the sliding-contact surface thereof.
    Type: Application
    Filed: July 14, 2010
    Publication date: July 12, 2012
    Applicant: OILES CORPORATION
    Inventors: Hiroyuki Ogoe, Shinya Nishimura, Kentaro Okubo
  • Publication number: 20120178328
    Abstract: A sliding contact surface-forming material includes a reinforcing base impregnated with a resol-type phenolic resin having polytetrafluoroethylene resin dispersed therein. The reinforcing base is composed of a woven fabric formed by using, respectively as the warp and the weft, a ply yarn which is formed by paralleling at least two strands of a single twist yarn spun from fluorine-containing resin fiber and a single twist yarn spun from polyphenylene sulfide fiber, and by twisting them in the direction opposite to the direction in which the single twist yarns were spun. Also, a multi-layered sliding contact component having the overall shape of a flat plate or a circular cylinder includes the sliding contact surface-forming material so as to configure at least the sliding-contact surface thereof.
    Type: Application
    Filed: July 14, 2010
    Publication date: July 12, 2012
    Applicant: OILES CORPORATION
    Inventors: Hiroyuki Ogoe, Shinya Nishimura, Kentaro Okubo