Patents by Inventor Yasuhiko Sakaguchi

Yasuhiko Sakaguchi 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: 9815115
    Abstract: A finish heat treatment apparatus for an iron powder. Raw iron powder is placed on a continuous moving hearth and continuously charged into the apparatus. In a pretreatment zone, the raw iron powder is subjected to a pretreatment of heating the raw iron powder in an atmosphere of hydrogen gas and/or inert gas at 450 to 1100° C. In decarburization, deoxidation, and denitrification zones, the pretreated iron powder is subsequently subjected to at least two treatments of decarburization, deoxidation, and denitrification. In the pretreatment zone, a hydrogen gas and/or an inert gas serving as a pretreatment ambient gas is introduced separately from an ambient gas used in the at least two treatments is introduced from the upstream side of the pretreatment zone and released from the downstream side so as to flow in the same direction as a moving direction of the moving hearth.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: November 14, 2017
    Assignee: JFE STEEL CORPORATION
    Inventors: Yasuhiko Sakaguchi, Toshio Maetani
  • Publication number: 20160114391
    Abstract: In a finish heat treatment method and finish heat treatment apparatus for an iron powder, a raw iron powder is placed on a continuous moving hearth and continuously charged into the apparatus. In the pretreatment zone, the raw iron powder is subjected to a pretreatment of heating the raw iron powder in an atmosphere of hydrogen gas and/or inert gas at 450 to 1100° C. In decarburization, deoxidation, and denitrification zones, the pretreated iron powder is subsequently subjected to at least two treatments of decarburization, deoxidation, and denitrification. In the pretreatment zone, a hydrogen gas and/or an inert gas serving as a pretreatment ambient gas is introduced separately from an ambient gas used in the at least two treatments is introduced from the upstream side of the pretreatment zone and released from the downstream side so as to flow in the same direction as a moving direction of the moving hearth.
    Type: Application
    Filed: January 4, 2016
    Publication date: April 28, 2016
    Applicant: JFE STEEL CORPORATION
    Inventors: Yasuhiko SAKAGUCHI, Toshio MAETANI
  • Patent number: 9321103
    Abstract: In a finish heat treatment method and finish heat treatment apparatus for an iron powder, a raw iron powder is placed on a continuous moving hearth and continuously charged into the apparatus. In the pretreatment zone, the raw iron powder is subjected to a pretreatment of heating the raw iron powder in an atmosphere of hydrogen gas and/or inert gas at 450 to 1100° C. In decarburization, deoxidation, and denitrification zones, the pretreated iron powder is subsequently subjected to at least two treatments of decarburization, deoxidation, and denitrification. In the pretreatment zone, a hydrogen gas and/or an inert gas serving as a pretreatment ambient gas is introduced separately from an ambient gas used in the at least two treatments is introduced from the upstream side of the pretreatment zone and released from the downstream side so as to flow in the same direction as a moving direction of the moving hearth.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: April 26, 2016
    Assignee: JFE STEEL CORPORATION
    Inventors: Yasuhiko Sakaguchi, Toshio Maetani
  • Publication number: 20150199658
    Abstract: A secure, inexpensive, convenient payment system which allows an existing communication to be used to make an expensive payment terminal unnecessary, makes local communication unnecessary to make it possible to use the system by a seller and a buyer, uses closed-loop type electronic money to make it possible to make payment on delivery is obtained. An account database 6 which is arranged as equipment of a communication carrier and manages accounts of sellers and buyers (users), and a payment server 5 which is arranged as equipment of the communication carrier and performs an electronic payment process between the seller and the buyer are arranged. In the payment server 5, a primary payment server 3 and a secondary payment server 4 are arranged. When a payment request from a user is received through a communication network 10, the primary payment server 3 refers to the account database 6 to perform a real-time payment process by electronic money as primary payment between accounts of the seller and the buyer.
    Type: Application
    Filed: March 27, 2015
    Publication date: July 16, 2015
    Applicant: NEC Corporation
    Inventors: Naotake FUJITA, Takuji TOMIYAMA, Yasuhiko SAKAGUCHI, Toshiyuki MISU
  • Publication number: 20140048184
    Abstract: In a finish heat treatment method and finish heat treatment apparatus for an iron powder, a raw iron powder is placed on a continuous moving hearth and continuously charged into the apparatus. In the pretreatment zone, the raw iron powder is subjected to a pretreatment of heating the raw iron powder in an atmosphere of hydrogen gas and/or inert gas at 450 to 1100° C. In decarburization, deoxidation, and denitrification zones, the pretreated iron powder is subsequently subjected to at least two treatments of decarburization, deoxidation, and denitrification. In the pretreatment zone, a hydrogen gas and/or an inert gas serving as a pretreatment ambient gas is introduced separately from an ambient gas used in the at least two treatments is introduced from the upstream side of the pretreatment zone and released from the downstream side so as to flow in the same direction as a moving direction of the moving hearth.
    Type: Application
    Filed: December 15, 2011
    Publication date: February 20, 2014
    Applicant: JFE STEEL CORPORATION
    Inventors: Yasuhiko Sakaguchi, Toshio Maetani
  • Patent number: 8102762
    Abstract: A system, which is connectable to a first apparatus capable of data communication using a data communication protocol via a network where each session is managed by a session management protocol, includes: a connecting section which, if ID about the first apparatus exists in a storing section when a start instruction is received from the first apparatus, registers ID about a session corresponding to the start instruction in association with the ID about the first apparatus, and establishes a path enabling data communication for the first apparatus in the network using the session management protocol; and a providing section which, upon receiving the ID about the session from a second apparatus, transmits confirmation information according to the result of confirmation about whether the ID about the first apparatus is in association with the ID about the session.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: January 24, 2012
    Assignee: NEC Corporation
    Inventors: Hiroki Oyama, Tomoki Murakami, Hiroshi Kurihara, Yoshiki Shioji, Atsushi Hashiguchi, Keisuke Daikohara, Yasuhiko Sakaguchi
  • Patent number: 7971872
    Abstract: A drive joint mechanism includes a drive shaft (30) and a driven shaft (24) coupled coaxially to the drive shaft (30). A coupling (31) on the drive shaft (30) or the driven shaft (24) has pin-engaging grooves (31a, 31b) and at least one pyramid-shaped pin-guide (32) between adjacent pin-engaging grooves (31a, 31b). An engagement pin (25) is provided on the other of the drive shaft (30) and the driven shaft (24) and engages the pin-engaging groove (31a, 31b). The engagement pin (25) contacts the pin-guide (32) while coupling the drive shaft (30) and the driven shaft (24). Thus, at least one of the drive shaft (30) and the driven shaft (24) is rotated by a pressing force exerted in the axial direction by the driven shaft (24) so that the pin-guide (32) guides the engagement pin (25) into the pin-engaging groove (31a, 31b).
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: July 5, 2011
    Assignee: Kyocera Mita Corporation
    Inventors: Hiroyoshi Omura, Yasuhiko Sakaguchi
  • Publication number: 20100223187
    Abstract: A secure, inexpensive, convenient payment system which allows an existing communication to be used to make an expensive payment terminal unnecessary, makes local communication unnecessary to make it possible to use the system by a seller and a buyer, uses closed-loop type electronic money to make it possible to make payment on delivery is obtained. An account database 6 which is arranged as equipment of a communication carrier and manages accounts of sellers and buyers (users), and a payment server 5 which is arranged as equipment of the communication carrier and performs an electronic payment process between the seller and the buyer are arranged. In the payment server 5, a primary payment server 3 and a secondary payment server 4 are arranged. When a payment request from a user is received through a communication network 10, the primary payment server 3 refers to the account database 6 to perform a real-time payment process by electronic money as primary payment between accounts of the seller and the buyer.
    Type: Application
    Filed: August 3, 2006
    Publication date: September 2, 2010
    Inventors: Naotake Fujita, Takuji Tomiyama, Yasuhiko Sakaguchi, Toshiyuki Misu
  • Publication number: 20100223463
    Abstract: To provide a mobile communication system that can prevent unauthorized use of an encryption key otherwise caused by loss thereof and that can securely perform a direct communication between terminals using the encryption key. A portable terminal apparatus 1-1 transmits a P2P communication trigger to a portable terminal apparatus 1-n through a key managing/distributing server 3. In response to the transmission/reception of the trigger, the portable terminal apparatuses 1-1 and 1-n establish IPsec data sessions with the key managing/distributing server 3 through a SIP server 2 and a secret key is distributed per communication to the portable terminal apparatuses 1-1 and 1-n from the key managing/distributing server 3. The portable terminal apparatuses 1-1 and 1-n establish an IPsec data session therebetween using the secret key, thereby performing a P2P communication.
    Type: Application
    Filed: August 4, 2006
    Publication date: September 2, 2010
    Inventors: Yasuhiko Sakaguchi, Toshiyuki Misu, Takuji Tomiyama, Naotake Fujita
  • Publication number: 20090303992
    Abstract: A system, which is connectable to a first apparatus capable of data communication using a data communication protocol via a network where each session is managed by a session management protocol, includes: a connecting section which, if ID about the first apparatus exists in a storing section when a start instruction is received from the first apparatus, registers ID about a session corresponding to the start instruction in association with the ID about the first apparatus, and establishes a path enabling data communication for the first apparatus in the network using the session management protocol; and a providing section which, upon receiving the ID about the session from a second apparatus, transmits confirmation information according to the result of confirmation about whether the ID about the first apparatus is in association with the ID about the session.
    Type: Application
    Filed: June 5, 2009
    Publication date: December 10, 2009
    Inventors: Hiroki Oyama, Tomoki Murakami, Hiroshi Kurihara, Yoshiki Shioji, Atsushi Hashiguchi, Keisuke Daikohara, Yasuhiko Sakaguchi
  • Publication number: 20080304865
    Abstract: A drive joint mechanism includes a drive shaft (30) and a driven shaft (24) coupled coaxially to the drive shaft (30). A coupling (31) on the drive shaft (30) or the driven shaft (24) has pin-engaging grooves (31a, 31b) and at least one pyramid-shaped pin-guide (32) between adjacent pin-engaging grooves (31a, 31b). An engagement pin (25) is provided on the other of the drive shaft (30) and the driven shaft (24) and engages the pin-engaging groove (31a, 31b). The engagement pin (25) contacts the pin-guide (32) while coupling the drive shaft (30) and the driven shaft (24). Thus, at least one of the drive shaft (30) and the driven shaft (24) is rotated by a pressing force exerted in the axial direction by the driven shaft (24) so that the pin-guide (32) guides the engagement pin (25) into the pin-engaging groove (31a, 31b).
    Type: Application
    Filed: June 5, 2008
    Publication date: December 11, 2008
    Applicant: KYOCERA MITA CORPORATION
    Inventors: Hiroyoshi Omura, Yasuhiko Sakaguchi
  • Publication number: 20050193862
    Abstract: A method for manufacturing sponge iron and an apparatus for charging in the method are disclosed. Iron oxide powder and reducing-agent powder are charged such that alternating layers of the iron oxide powder and the reducing-agent powder are formed and such that each of the layers is in the form of a helix, and then a reduction treatment is performed. The method has not only high reaction efficiency of a gas, high quality, and high productivity, but also the advantage for a production adjustment because the amount of charge can be adjusted without the limitation of a reduction time. The molar ratio of the carbon content in the reducing agent to the oxygen content in the iron oxide in the reaction container is preferably 1.1 or more.
    Type: Application
    Filed: January 29, 2004
    Publication date: September 8, 2005
    Applicant: JFE STEEL CORPORATION
    Inventors: Yoshitomo Suzuki, Akio Sonobe, Takashi Kuroki, Yasuhiko Sakaguchi, Hiroshi Itaya, Yotsuo Misumi, Isao Funatsu
  • Patent number: 6231826
    Abstract: Process and apparatus for refining silicon by treatment in a graphite vessel with irradiation with an electron beam while removing impurity elements by evaporation. A single graphite vessel is used, or plural graphite vessels are arranged in sequence. During treatment in successive graphite vessels, molten silicon is poured in succession from one vessel to another. Use of graphite vessels improves heat efficiency, prevents contamination and produces refined silicon containing very low contents of impurities.
    Type: Grant
    Filed: September 8, 1999
    Date of Patent: May 15, 2001
    Assignee: Kawasaki Steel Corporation
    Inventors: Kazuhiro Hanazawa, Masamichi Abe, Hiroyuki Baba, Naomichi Nakamura, Noriyoshi Yuge, Yasuhiko Sakaguchi, Yoshiei Kato, Fukuo Aratani
  • Patent number: 6090361
    Abstract: Method for producing highly purified silicon for use in solar cells by a single solidification purification, pouring silicon into a mold and gradually fractionally solidifying it while solidifying the liquid surface, followed by purifying the solidified silicon by zone melting or continuous casting using an electromagnetic mold, or by zone melting in combination with continuous casting, and optionally causing directional solidification to concentrate impurities, leaching and recycling.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: July 18, 2000
    Assignee: Kawasaki Steel Corporation
    Inventors: Hiroyuki Baba, Masamichi Abe, Kazuhiro Hanazawa, Naomichi Nakamura, Noriyoshi Yuge, Yasuhiko Sakaguchi, Yoshiei Kato, Tetsuya Fujii
  • Patent number: 5961944
    Abstract: An object of the present invention is to provide a process and apparatus for the continuous flow production of polycrystalline silicon from metallic silicon or silicon oxide as a raw material and also for the manufacture of a wafer by using it, which process and apparatus permit the mass production at a low cost.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: October 5, 1999
    Assignee: Kawasaki Steel Corporation
    Inventors: Fukuo Aratani, Yoshiei Kato, Yasuhiko Sakaguchi, Noriyoshi Yuge, Hiroyuki Baba, Naomichi Nakamura, Kazuhiro Hanazawa
  • Patent number: 5302277
    Abstract: Paraformaldehyde of high formaldehyde content is produced by cooling and solidifying a 78-83 wt. % aqueous formaldehyde solution, and drying the resulting paraformaldehyde by means of microwave heating.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: April 12, 1994
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventor: Yasuhiko Sakaguchi
  • Patent number: 5104633
    Abstract: A method and apparatus for producing or manufacturing a high purity metallic silicon takes a process for generating silicon monoxide by causing reaction between a silicon dioxide containing material and molten state metallic silicon. The silicon monoxide thus generated is sucked for reduction by means of a reducing agent including a carbon containing material and a silicon containing material.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: April 14, 1992
    Assignees: Kawasaki Steel Corporation, Technical Research Division, Nippon Sheet Glass Co., Ltd.
    Inventors: Yasuhiko Sakaguchi, Fukuo Aratani, Kazuhiro Uchino, Mitsugi Yoshiyagawa, Kunio Miyata, Masato Ishizaki, Tetsuro Kawahara
  • Patent number: 4758117
    Abstract: The invention provides an efficient method for controlling the flow rate of a particulate material through a pneumatic transportation pipe at a preset value with a high accuracy and rapid response to an external disturbance added to the system by controlling the flow rate of the booster gas. Different from conventional methods in which the flow rate of the booster gas is controlled with the feedforward factor of the variation in the actual flow rate of the particulate material, the inventive method utilizes the variation in the pressure in the receiving unit as the feedback to control the flow rate of the booster gas so that the above mentioned advantages are obtained in the accuracy of control and rapidness of the response to an external disturbance.
    Type: Grant
    Filed: October 17, 1985
    Date of Patent: July 19, 1988
    Assignees: Kawasaki Steel Corp., Denka Consultant & Engineering Co., Ltd.
    Inventors: Yunosuke Maki, Youichi Watanabe, Yasuhiko Sakaguchi, Kazuaki Tanaka, Yuichi Kobayashi, Hideo Ooishi, Minoru Kobayashi