Patents by Inventor Hideo Tsuji

Hideo Tsuji 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: 10366188
    Abstract: An apparatus includes a processor and a memory configured to store design data used for disposition and wiring of a logic circuit on a programmable logic device, and store a table indicating a relationship between a power supply voltage value and a delay amount for each type of element in the logic circuit, the relationship having a nature to set the delay amount so as to increase in value as the power supply voltage value is smaller. The processor determines, as an optimum voltage value, a power supply voltage value at which the delay margin of a critical path indicates a desired value that is in the positive and is a minimum value. The processor outputs configuration information including the optimum voltage value and the design data so as to form the logic circuit on the programmable logic device supplied with a voltage determined by the optimum voltage value.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: July 30, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Hideo Tsuji
  • Publication number: 20170024004
    Abstract: An apparatus includes a processor and a memory configured to store design data used for disposition and wiring of a logic circuit on a programmable logic device, and store a table indicating a relationship between a power supply voltage value and a delay amount for each type of element in the logic circuit, the relationship having a nature to set the delay amount so as to increase in value as the power supply voltage value is smaller. The processor determines, as an optimum voltage value, a power supply voltage value at which the delay margin of a critical path indicates a desired value that is in the positive and is a minimum value. The processor outputs configuration information including the optimum voltage value and the design data so as to form the logic circuit on the programmable logic device supplied with a voltage determined by the optimum voltage value.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 26, 2017
    Applicant: FUJITSU LIMITED
    Inventor: HIDEO TSUJI
  • Patent number: 8349773
    Abstract: In a slide member in which an overlay is provided on a slide receiving surface of a base member, the overlay is formed by attaching a mixed solid lubricant on the slide receiving surface of the base member. The mixed solid lubricant is made by mixing a large amount of hydrogen containing solid lubricant which contains a large amount of hydrogen, and a small amount of hydrogen containing solid lubricant which contains a smaller hydrogen amount than the large amount of hydrogen containing lubricant. Thereby, a lubricant absence region where the solid lubricant is absent in a thickness direction is formed on the slide receiving surface of the base member after sliding, and an oxidized portion where the base member is oxidized is formed in the lubricant absence region.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: January 8, 2013
    Assignee: Daido Metal Company Ltd.
    Inventors: Satoshi Takayanagi, Yukihiko Kagohara, Hideo Tsuji, Shigeya Haneda
  • Patent number: 8273465
    Abstract: A slide member including a base material; and an overlay that is formed over the base material and that consists of Ag or Ag alloy including crystal planes (hk1) represented by Miller indices; wherein a relative X-ray diffraction intensity of crystal plane (200) to a sum of X-ray diffraction intensities of crystal planes (200), (111), (220), (311), and (222) of the overlay ranges between 1%?(200)/{(200)+(111)+(220)+(311)+(222)}?20% and the relative X-ray diffraction intensity of the crystal plane (200) to the X-ray diffraction intensity of the crystal plane (111) ranges between 1%?(200)/(111)?30%.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: September 25, 2012
    Assignee: Daido Metal Company Ltd.
    Inventors: Manabu Izumida, Hideo Tsuji
  • Patent number: 8216692
    Abstract: A slide member including a base material; an intermediate layer consisting of Ag or Ag-based alloy and an additive element of a first quantity formed over the base material; and an overlay comprising Bi or Bi-based alloy and the additive element of a second quantity formed over the intermediate layer, wherein the additive element consists of a low melting point metal, the first quantity being five times or greater than the second quantity.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: July 10, 2012
    Assignee: Daido Metal Company Ltd.
    Inventors: Mikihito Yasui, Hideo Tsuji, Hiroyuki Asakura
  • Patent number: 7833609
    Abstract: The present invention is intended to provide a sliding member which exhibits an excellent anti-seizure property even under starved lubricant conditions. In the present invention, there is provided a sliding member with a structure, in which a coating layer having a sliding surface is adhered to the surface of the base material, wherein the coating layer does not contain a resin binder but has solid lubricant plate crystal particles laminated therein, wherein these solid lubricant plate crystal particles have a lamellar crystal structure in which (001) planes are stacked in parallel, and at least in the sliding surface, the orientation index of the (001) plane of the solid lubricant plate crystal particles is 90% or more.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: November 16, 2010
    Assignee: Daido Metal Co., Ltd.
    Inventors: Masahito Fujita, Hideo Tsuji, Shinji Ochi, Manabu Izumida
  • Publication number: 20100266869
    Abstract: A slide member including a base material; an intermediate layer consisting of Ag or Ag-based alloy and an additive element of a first quantity formed over the base material; and an overlay comprising Bi or Bi-based alloy and the additive element of a second quantity formed over the intermediate layer, wherein the additive element consists of a low melting point metal, the first quantity being five times or greater than the second quantity.
    Type: Application
    Filed: April 15, 2010
    Publication date: October 21, 2010
    Applicant: DAIDO METAL COMPANY LTD.
    Inventors: Mikihito YASUI, Hideo Tsuji, Hiroyuki Asakura
  • Publication number: 20100248999
    Abstract: A slide member including a base material; and an overlay that is formed over the base material and that consists of Ag or Ag alloy including crystal planes (hk1) represented by Miller indices; wherein a relative X-ray diffraction intensity of crystal plane (200) to a sum of X-ray diffraction intensities of crystal planes (200), (111), (220), (311), and (222) of the overlay ranges between 1%?(200)/{(200)+(111)+(220)+(311)+(222)}?20% and the relative X-ray diffraction intensity of the crystal plane (200) to the X-ray diffraction intensity of the crystal plane (111) ranges between 1%?(200)/(111)?30%.
    Type: Application
    Filed: March 24, 2010
    Publication date: September 30, 2010
    Applicant: DAIDO METAL COMPANY LTD.
    Inventors: Manabu Izumida, Hideo Tsuji
  • Publication number: 20100177995
    Abstract: In a slide member in which an overlay is provided on a slide receiving surface of a base member, the overlay is formed by attaching a mixed solid lubricant on the slide receiving surface of the base member. The mixed solid lubricant is made by mixing a large amount of hydrogen containing solid lubricant which contains a large amount of hydrogen, and a small amount of hydrogen containing solid lubricant which contains a smaller hydrogen amount than the large amount of hydrogen containing lubricant. Thereby, a lubricant absence region where the solid lubricant is absent in a thickness direction is formed on the slide receiving surface of the base member after sliding, and an oxidized portion where the base member is oxidized is formed in the lubricant absence region.
    Type: Application
    Filed: January 13, 2010
    Publication date: July 15, 2010
    Applicant: DAIDO METAL COMPANY LTD.
    Inventors: Satoshi Takayanagi, Yukihiko Kagohara, Hideo Tsuji, Shigeya Haneda
  • Publication number: 20090214887
    Abstract: A sliding member comprises an overlay layer that is formed on a copper alloy layer including a second phase composition. The copper alloy layer and the overlay layer have an interface therebetween, and the second phase composition is included in the copper alloy layer except the interface.
    Type: Application
    Filed: February 18, 2009
    Publication date: August 27, 2009
    Applicants: DAIDO METAL COMPANY LTD., HONDA MOTOR CO., LTD.
    Inventors: Masahito FUJITA, Hideo TSUJI, Kouji ZUSHI, Tasuku SAKURAI, Takashi SHIRAISHI, Mitsunori ARIMURA
  • Patent number: 7431507
    Abstract: A sliding member has a sliding alloy layer, an intermediate layer of Ni or a Ni alloy formed on the sliding alloy layer, and a soft layer of Sn or a Sn alloy formed on the intermediate layer. A recess is formed on the sliding side surface of the sliding alloy layer. The intermediate layer is formed on the inner surface of the recess. The sliding member is subjected to a heat treatment, whereby there are formed intermetallic compounds in the soft layer, which extend protrudently from the intermediate layer.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: October 7, 2008
    Assignee: Daido Metal Company Ltd
    Inventors: Hideo Tsuji, Masahito Fujita, Naohisa Kawakami, Koue Ohkawa
  • Patent number: 7399122
    Abstract: In order to improve conformability of a sliding surface of a sliding member in an early state of sliding, there is provided a sliding member in which a plurality of holes are formed on a sliding surface, and the diameters (or the opening area) of the holes on the sliding surface are arranged so as to become gradually large as it gets closer to both ends in an axial direction from the center side in the axial direction. This feature decreases the pressurized area as it gets closer to the ends of the sliding surface so that it wears at an early stage, whereby a conformed surface following the deflection of a mating member is provided.
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: July 15, 2008
    Assignee: Daido Metal Company Ltd.
    Inventors: Masahito Fujita, Hideo Tsuji, Takayuki Shibayama
  • Patent number: 7290936
    Abstract: In a slide member such as a slide bearing, the invention can make a height of a bank portion around an oil keeping concave portion small, whereby it is possible to improve an initial conformability and improve an anti-seizure performance. A plurality of holes are formed on a slide surface with respect to an opposing member by a fiber laser apparatus. At this time, in the case that a height of a bank portion generated in the periphery of the concave portions in accordance with the laser processing so as to bulge from a slide surface is set to t, and a depth of the concave portions from the slide surface is set to h, an energy density of the laser beam is adjusted such that a value t is equal to or less than 3 ?m, and a rate t/h is between 0.1 and 0.5.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: November 6, 2007
    Assignee: Daido Metal Company Ltd.
    Inventors: Hideo Tsuji, Masahito Fujita
  • Publication number: 20070116936
    Abstract: The present invention is intended to provide a sliding member which exhibits an excellent anti-seizure property even under starved lubricant conditions. In the present invention, there is provided a sliding member with a structure, in which a coating layer having a sliding surface is adhered to the surface of the base material, wherein the coating layer does not contain a resin binder but has solid lubricant plate crystal particles laminated therein, wherein these solid lubricant plate crystal particles have a lamellar crystal structure in which (001) planes are stacked in parallel, and at least in the sliding surface, the orientation index of the (001) plane of the solid lubricant plate crystal particles is 90% or more.
    Type: Application
    Filed: November 22, 2006
    Publication date: May 24, 2007
    Applicant: Daido Metal Company Ltd.
    Inventors: Masahito Fujita, Hideo Tsuji, Shinji Ochi, Manabu Izumida
  • Patent number: 7153591
    Abstract: Disclosed is a sliding member having a bearing alloy layer, an intermediate layer of Ni or a Ni alloy formed on the bearing alloy layer, and an overlay layer of a Sn alloy containing Cu formed on the intermediate layer. There exist Sn—Cu compounds in the overlay layer, which protrudently extend from the intermediate layer. The hard Sn—Cu compounds contribute to the overlay layer in improving fatigue resistance property. A soft Sn matrix being rich in an outer surface region of the overlay layer is responsible for keeping good conformability to have excellent anti-seizure property.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: December 26, 2006
    Assignee: Daido Metal Company Ltd.
    Inventors: Hideo Tsuji, Masahito Fujita, Naohisa Kawakami, Koue Ohkawa
  • Patent number: 7118279
    Abstract: The invention provides a sliding member including a plurality of holes formed on a sliding surface thereof, which sliding surface is adapted to slide on a mating member, at least one of the holes having an enlarged portion in at least a portion between an opening end and a bottom end thereof, the enlarged portion being larger than the opening end on the sliding surface.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: October 10, 2006
    Assignee: Daido Metal Company Ltd.
    Inventors: Masahito Fujita, Hideo Tsuji, Takayuki Shibayama
  • Publication number: 20050196085
    Abstract: In a slide member such as a slide bearing, the invention can make a height of a bank portion around an oil keeping concave portion small, whereby it is possible to improve an initial conformability and improve an anti-seizure performance. A plurality of holes are formed on a slide surface with respect to an opposing member by a fiber laser apparatus. At this time, in the case that a height of a bank portion generated in the periphery of the concave portions in accordance with the laser processing so as to bulge from a slide surface is set to t, and a depth of the concave portions from the slide surface is set to h, an energy density of the laser beam is adjusted such that a value t is equal to or less than 3 ?m, and a rate t/h is between 0.1 and 0.5.
    Type: Application
    Filed: March 8, 2005
    Publication date: September 8, 2005
    Applicant: Daido Metal Company Ltd.
    Inventors: Hideo Tsuji, Masahito Fujita
  • Publication number: 20040264820
    Abstract: A sliding member has a sliding alloy layer, an intermediate layer of Ni or a Ni alloy formed on the sliding alloy layer, and a soft layer of Sn or a Sn alloy formed on the intermediate layer. A recess is formed on the sliding side surface of the sliding alloy layer. The intermediate layer is formed on the inner surface of the recess. The sliding member is subjected to a heat treatment, whereby there are formed intermetallic compounds in the soft layer, which extend protrudently from the intermediate layer.
    Type: Application
    Filed: June 8, 2004
    Publication date: December 30, 2004
    Applicant: Daido Metal Company Ltd.
    Inventors: Hideo Tsuji, Masahito Fujita, Naohisa Kawakami, Koue Ohkawa
  • Publication number: 20040265618
    Abstract: Disclosed is a sliding member having a bearing alloy layer, an intermediate layer of Ni or a Ni alloy formed on the bearing alloy layer, and an overlay layer of a Sn alloy containing Cu formed on the intermediate layer. There exist Sn—Cu compounds in the overlay layer, which protrudently extend from the intermediate layer. The hard Sn—Cu compounds contribute to the overlay layer in improving fatigue resistance property. A soft Sn matrix being rich in an outer surface region of the overlay layer is responsible for keeping good conformability to have excellent anti-seizure property.
    Type: Application
    Filed: June 18, 2004
    Publication date: December 30, 2004
    Applicant: DAIDO METAL COMPANY LTD.
    Inventors: Hideo Tsuji, Masahito Fujita, Naohisa Kawakami, Koue Ohkawa
  • Publication number: 20040228554
    Abstract: In order to improve conformability of a sliding surface of a sliding member in an early state of sliding, there is provided a sliding member in which a plurality of holes are formed on a sliding surface, and the diameters (or the opening area) of the holes on the sliding surface are arranged so as to become gradually large as it gets closer to both ends in an axial direction from the center side in the axial direction. This feature decreases the pressurized area as it gets closer to the ends of the sliding surface so that it wears at an early stage, whereby a conformed surface following the deflection of a mating member is provided.
    Type: Application
    Filed: May 4, 2004
    Publication date: November 18, 2004
    Applicant: Daido Metal Company Ltd.
    Inventors: Masahito Fujita, Hideo Tsuji, Takayuki Shibayama