Patents by Inventor Tomoya Yamada

Tomoya Yamada 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: 9798119
    Abstract: A zoom lens includes in order from an object side, a zoom lens unit that moves during zooming, and an aperture stop; and a relay lens unit that does not move for zooming, and the relay lens unit includes an extender lens unit changing a focal length range of the zoom lens by entering into and leaving from an optical path of the zoom lens, and that unit includes front, middle, and rear lens sub-units each including one positive lens and one negative lens. The following expressions are satisfied: 0.250<Nn?Np; |fbp/fb|<0.200; and |fbn/fb|<0.200, where Np and fbp denote a refractive index and a focal length of the positive lens, Nn and fbn denote a refractive index and a focal length of the negative lens, and fb denotes a focal length of the middle lens sub-unit.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: October 24, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Tomoya Yamada
  • Publication number: 20170090164
    Abstract: A zoom lens includes in order from an object side, a zoom lens unit that moves during zooming, and an aperture stop; and a relay lens unit that does not move for zooming, and the relay lens unit includes an extender lens unit changing a focal length range of the zoom lens by entering into and leaving from an optical path of the zoom lens, and that unit includes front, middle, and rear lens sub-units each including one positive lens and one negative lens. The following expressions are satisfied: 0.250<Nn?Np; |fbp/fb|<0.200; and |fbn/fb|<0.200, where Np and fbp denote a refractive index and a focal length of the positive lens, Nn and fbn denote a refractive index and a focal length of the negative lens, and fb denotes a focal length of the middle lens sub-unit.
    Type: Application
    Filed: September 14, 2016
    Publication date: March 30, 2017
    Inventor: Tomoya Yamada
  • Publication number: 20170067509
    Abstract: A wheel bearing apparatus has an outer member, an inner member, and double row rolling elements contained between the outer raceway surfaces and inner raceway surfaces of the outer member and the inner member. A cup-shaped steel protective cover is mounted on the inner-side end of the outer member. The cover fitting portion has a cylindrical portion, a radially reduced portion and an elastic member. The elastic member has an annular projection and a contact lip. When the protective cover is fit into the outer member, the annular projection closely contacts with the fitting surface while elastically deforming and the contact lip elastically contacts the inner-side end of the outer member.
    Type: Application
    Filed: September 10, 2016
    Publication date: March 9, 2017
    Inventor: Tomoya YAMADA
  • Publication number: 20160187628
    Abstract: Provided is a zoom lens having a wide angle of field, a high zoom ratio, and high optical performance over the entire zoom range, and being small in size and lightweight. The zoom lens includes, in order from an object side to an image side: a first positive lens unit; a second negative lens unit; a third positive lens unit; a fourth positive lens unit; and at least one rear lens unit, in which: the first lens unit is configured not to move for zooming; the second lens unit, the third lens unit, and the fourth lens unit are configured to move while changing an interval between each pair of adjacent lens units during zooming; and the third lens unit (U3) is configured to move from the object side toward the image side during focusing from an object at infinity to an object at close distance.
    Type: Application
    Filed: December 22, 2015
    Publication date: June 30, 2016
    Inventors: Yotaro Sanjo, Tomoya Yamada
  • Publication number: 20160124199
    Abstract: A zoom lens include, from an object side: a positive first unit that does not move for zooming; a negative second unit that moves during zooming; a negative third unit that moves during zooming; a positive fourth unit that moves during zooming; and a positive fifth unit, wherein the second unit moves towards the image side during zooming towards a telephoto end, the third unit moves towards the object side during focus adjustment towards a close distance, and a focal length of the zoom lens at the wide angle end, a zoom ratio, a focal length of the zoom lens at a zoom position where the third unit is closest to the object, a focal length of the first unit, a focal length of the second unit, a focal length of the third unit, and a focal length of the fourth unit are appropriately set.
    Type: Application
    Filed: October 22, 2015
    Publication date: May 5, 2016
    Inventors: Yotaro Sanjo, Yutaka Iriyama, Tomoya Yamada, Masakazu Kodaira
  • Publication number: 20160001053
    Abstract: The present invention provides a drug-holding microneedle array in which a drug is applied and held only on a tip portion of microneedles for quantitatively holding the drug and for preventing the drug from falling away during insertion of the microneedles. The drug-holding microneedle array comprises: a microneedle array having a microneedle substrate 4 and microneedles, the microneedles being positioned in plural on the microneedle substrate 4 and a tip portion 1 of the microneedles projecting via steps 2 and a drug held on the tip portion of the microneedles and the steps 2.
    Type: Application
    Filed: February 10, 2014
    Publication date: January 7, 2016
    Inventors: Ying-shu Quan, Fumio Kamiyama, Tomoya Yamada
  • Patent number: 9034552
    Abstract: The carrier core particles for electrophotographic developer have a volume size distribution with a median particle size ranging from 30 ?m to 40 ?m, the ratio of the carrier core particles having a diameter of 22 ?m or lower in the volume size distribution is from 1.0% to 2.0%, the ratio of the carrier core particles having a diameter of 22 ?m or lower in a number size distribution is 10% or lower, and the magnetization of the carrier core particles in an external magnetic field of 1000 Oe is from 50 emu/g to 75 emu/g.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: May 19, 2015
    Assignees: DOWA ELECTRONICS MATERIALS CO., LTD., DOWA IP CREATION CO., LTD.
    Inventors: Tomohide Iida, Tomoya Yamada, Takashi Fujiwara
  • Patent number: 8944196
    Abstract: A wheel bearing apparatus incorporating an in-wheel motor has a connecting shaft. The connecting shaft has a disc portion, forming the planetary elements, and a shaft portion, axially extending from the disc portion, via a shoulder portion. The outer circumference of the shaft portion has a serration. The connecting shaft is inserted into the wheel hub until the disc portion abuts the inner member. A seal ring, formed of elastic material, is interposed between the inner member and the connecting shaft to shield the driving portion from the outside in a liquid-tight manner.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: February 3, 2015
    Assignee: NTN Corporation
    Inventors: Tomoya Yamada, Syougo Suzuki
  • Patent number: 8697325
    Abstract: To provide a carrier for an electrophotographic developer in which high image quality and full colorization are possible while carrier scattering is reduced, and a method for producing the carrier, and an electrophotographic developer including the carrier. A carrier core material for an electrophotographic developer is produced so that the half-value width B of a peak having a maximum intensity in an XRD pattern satisfies B?0.160 (degree). A carrier for an electrophotographic developer and an electrophotographic developer are produced from the carrier core material for an electrophotographic developer.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: April 15, 2014
    Inventors: Tomoya Yamada, Takashi Fujiwara, Ryusuke Nakao, Yukihiro Matuda, Tomokazu Mouri
  • Publication number: 20140017606
    Abstract: A material expressed as a composition formula MXFe3-XO4 (where M is at least one of Mg and Mn, and 0?X?1) is a main component, and as a total amount, 0.1 to 2.5 weight percent of at least one of a Sr element and a Ca element is contained. Here, when ferrite particles are used as a carrier, in terms of obtaining a higher image density, the fluidity of the ferrite particles magnetized under a magnetic field of 1000/(4?) kA/m (1000 oersteds) is preferably 40 seconds or more. The residual magnetization ?r is preferably 3 Am2/kg or more.
    Type: Application
    Filed: March 19, 2012
    Publication date: January 16, 2014
    Applicants: DOWA IP CREATION CO., LTD, DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Tomoya Yamada, Tomohide Iida
  • Publication number: 20130344431
    Abstract: The carrier core particles for electrophotographic developer have a volume size distribution with a median particle size ranging from 30 ?m to 40 ?m, the ratio of the carrier core particles having a diameter of 22 ?m or lower in the volume size distribution is from 1.0% to 2.0%, the ratio of the carrier core particles having a diameter of 22 ?m or lower in a number size distribution is 10% or lower, and the magnetization of the carrier core particles in an external magnetic field of 1000 Oe is from 50 emu/g to 75 emu/g.
    Type: Application
    Filed: March 1, 2012
    Publication date: December 26, 2013
    Applicants: DOWA IP CREATION CO., LTD., DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Tomohide Iida, Tomoya Yamada, Takashi Fujiwara
  • Patent number: 8592123
    Abstract: To provide a carrier for electrophotographic developer, capable of realizing a high image quality and full colorization and reducing carrier scattering, and a manufacturing method of the same, and an electrophotographic developer containing the carrier. A carrier core material for electrophotographic developer, with a general formula expressed by MgxMn(1-x)FeyO4 (where 0<x<1, and 1.6?y?2.4), wherein a half-value width B of a peak having a maximum intensity in a powder XRD pattern satisfies B?0.180 (degree), is manufactured and from this carrier core material for electrophotographic developer, the carrier for electrophotographic developer and the electrophotographic developer are manufactured.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: November 26, 2013
    Assignees: Dowa Electronics Materials Co., Ltd., Dowa IP Creation Co., Ltd.
    Inventors: Tomoya Yamada, Takashi Fujiwara, Ryusuke Nakao, Yukihiro Matuda, Tomokazu Mouri
  • Patent number: 8475682
    Abstract: To provide a phosphor for manufacturing an one chip type LED illumination, etc, by combining a near ultraviolet/ultraviolet LED and a blue LED, and having an excellent emission efficiency including luminance. The phosphor is given as a general composition formula expressed by MmAaBbOoNn:Z, (where element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is one or more kinds of elements acting as an activator.), satisfying a=(1+x)×m, b=(4?x)×m, o=x×m, n=(7?x)×m, 0?x?1, wherein when excited by light in a wavelength range from 300 nm to 500 nm, the phosphor has an emission spectrum with a peak wavelength in a range from 500 nm to 620 nm.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: July 2, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Akira Nagatomi, Kenji Sakane, Tomoya Yamada
  • Patent number: 8387044
    Abstract: Identifiers of a plurality of physical HBAs disposed in a real host are grouped into a virtual HBA(s) for each work application executed in the real host. A storage device of a management server manages a virtual HBA ID which is an identifier of the virtual HBA and physical HBA IDs which are identifiers of the grouped physical HBAs, which are associated with each other. A display device of the management server displays information on a virtual host in which the virtual HBA is virtually disposed.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: February 26, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Tomoya Yamada, Manabu Obana
  • Patent number: 8343453
    Abstract: To provide a carrier for two-component electrophotographic developer not only having excellent fluidity but also having proper surface irregularities necessary for imparting electric charge, without generating cracks/chipping of particles even under an influence of stirring stress over a long period of time. A particle surface has raised parts of striped pattern extending almost continuously in a plurality of directions while being superposed on one another, with a surface formed with raised parts of striped pattern occupying 80% or more of the whole surface of a particle. Depths of grooves between the adjacent raised parts are 0.05 ?m or more and 0.2 ?m or less, average surface roughness Ra is 0.1 ?m or more and 0.3 ?m or less, roundness is 0.90 or more, and average particle size is 15 ?m or more and 100 ?m or less, and a carrier core material thus constituted is coated with resin. Thus, the carrier for two-component electrophotographic developer is prepared.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: January 1, 2013
    Assignees: Dowa Electronics Materials Co., Ltd., Dowa IP Creation Co., Ltd.
    Inventors: Tomoya Yamada, Isao Fujita, Yoshiaki Aiki
  • Publication number: 20120177315
    Abstract: A vehicle wheel bearing apparatus has a seal with a metal core and a sealing member. The metal core includes a cylindrical fitting portion press-fit into an end of the inner circumference of an outer member. A radially inner portion extends radially inward from the fitting portion. The sealing member is integrally adhered to the metal core. The sealing member has a side lip that is radially outwardly inclined. Either one of the metal core or the sealing member is formed with a weir portion that extends radially outward from the fitting portion of the metal core. The weir portion opposes the inner-side surface of the wheel mounting flange, via a small axial gap, to form a labyrinth seal. The weir portion also opposes the outer-side end face of the outer member, via a predetermined axial gap, to form an annular discharging groove.
    Type: Application
    Filed: March 23, 2012
    Publication date: July 12, 2012
    Applicant: NTN Corporation
    Inventors: Masaaki Matsuki, Tomoya Yamada, Syougo Suzuki
  • Publication number: 20120131196
    Abstract: The present invention manages response performance of a virtual volume. A performance monitoring server 10 monitors performance of a virtual volume 400, which a storage apparatus 40 provides to a host 30. When response performance of a virtual volume becomes lower than target performance, the performance monitoring server 10 creates and presents to a user either one or multiple solutions for improving the response performance. The user is able to issue an instruction based on the presented one or multiple solutions.
    Type: Application
    Filed: November 18, 2010
    Publication date: May 24, 2012
    Inventor: Tomoya Yamada
  • Publication number: 20120104317
    Abstract: To provide a phosphor for manufacturing an one chip type LED illumination, etc, by combining a near ultraviolet/ultraviolet LED and a blue LED, and having an excellent emission efficiency including luminance. The phosphor is given as a general composition formula expressed by MmAaBbOoNn:Z, (where element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is one or more kinds of elements acting as an activator.), satisfying a=(1+x)×m, b=(4?x)×m, o=x×m, n=(7?x)×m, 0?x?1, wherein when excited by light in a wavelength range from 300 nm to 500 nm, the phosphor has an emission spectrum with a peak wavelength in a range from 500 nm to 620 nm.
    Type: Application
    Filed: October 24, 2011
    Publication date: May 3, 2012
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Akira NAGATOMI, Kenji SAKANE, Tomoya YAMADA
  • Patent number: 8062549
    Abstract: To provide a phosphor for manufacturing an one chip type LED illumination, etc, by combining a near ultraviolet/ultraviolet LED and a blue LED, and having an excellent emission efficiency including luminance. The phosphor is given as a general composition formula expressed by MmAaBbOoNn:Z, (where element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is one or more kinds of elements acting as an activator.), satisfying a=(1+x)×m, b=(4?x)×m, o=x×m, n=(7?x)×m, 0?x?1, wherein when excited by light in a wavelength range from 300 nm to 500 nm, the phosphor has an emission spectrum with a peak wavelength in a range from 500 nm to 620 nm.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: November 22, 2011
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Akira Nagatomi, Kenji Sakane, Tomoya Yamada
  • Patent number: 7909908
    Abstract: A copper powder that is excellent in weatherability and adapted for use in conductive paste is provided that contains 10-20,000 ppm, preferably 100-2,000 ppm, of Sn. The copper powder is particularly preferably one having an average particle diameter DM of 0.1-2 ?m and, further, one wherein the particle diameter of at least 80% of all particles is in the range of 0.5 DM-1.5 DM. This copper powder can be produced, for example, by precipitating Cu metal by reduction of Cu ions in the presence of Sn ions.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: March 22, 2011
    Assignee: Dowa Electronics Materials Co., Ltd.
    Inventors: Tomoya Yamada, Koji Hirata