Patents by Inventor Junichi Koyama
Junichi Koyama 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).
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Patent number: 6832526Abstract: A bending apparatus for bending a workpiece W according to cooperation of a punch P and a die D previously carries out various step bending or makes simulation of step bending, and calculates an approximation formula based on a correlation between a ratio % of a one-sided elongation value &agr; to a plate thickness t and a step bending angle &thgr; based on a relationship among the plate thickness t, the step bending angle &thgr; and the one-sided elongation value &agr; of the workpiece W so as to store the formula as a database. The more accurate one-sided elongation value &agr; of the step bending is calculated by small parameters including only two data including the plate thickness t and the step bending angle &thgr; previously input at the time of actual bending based on the approximation formula in the data base so that the bending is carried out easily.Type: GrantFiled: December 30, 2002Date of Patent: December 21, 2004Assignee: Amada Company, LimitedInventors: Junichi Koyama, Kazunari Imai, Osamu Hayama, Hitoshi Omata
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Publication number: 20040202153Abstract: An IP-PBX has a software-based built-in control unit, a card slot into which a control card is plugged, and a data bus connecting the software-based control unit and the card slot. The software-based control unit includes a first management unit managing up to a first number of IP terminals, and an IP terminal registering unit connected to the first management unit and the card slot. The control card includes a second management unit managing up to a second number of IP terminals. The IP terminal registering unit compares a current number of IP terminals managed by the first management unit with the first number when an IP terminal requests communication. The IP terminal has an ID number and an IP address. If the current number is smaller than the first number, the IP terminal registering unit associates the first management unit with the ID number and the IP address, and the first management unit manages the IP terminal.Type: ApplicationFiled: April 13, 2004Publication date: October 14, 2004Applicant: NEC CorporationInventor: Junichi Koyama
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Patent number: 6796155Abstract: A plate thickness detector for a bending machine causes a punch to make a relative stroke and bend a workpiece mounted on an upper surface of a die cooperatively by the punch and the die. A displacement gauge is provided in the die, is always urged upward from a V-groove of the die, and measures a distance from the upper surface of the die to a lower surface of the workpiece. A ram position detector detects a relative stroke quantity of the punch to the die. The punch is caused to bend the workpiece from a position away from the die by a reference inter-blade distance.Type: GrantFiled: July 17, 2002Date of Patent: September 28, 2004Assignee: Amada Company, LimitedInventors: Junichi Koyama, Kazunari Imai, Hitoshi Omata, Osamu Hayama, Hidekatsu Ikeda
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Patent number: 6745030Abstract: In a mobile communication system, when a mobile visitor terminal registered at a first network enters a second network, it sends a registration signal to a first exchange belonging to the second network. The first exchange sends a roaming start request signal to the first network. On receiving authentication information from the first network, the exchange writes it in a VLR (Visitor Location Register) storage. On the origination of a call on the visitor terminal, call information is written to a call information storage. A third exchange stores in an VLR holding node number storage the fact that the call information is stored in the first exchange. When the visitor terminal moves to the area of a second exchange, the second exchange sees, based on the content of the VLR holding node number storage, that the authentication information is stored in the first exchange, and obtains it. The second exchange switches connection thereto on the basis of the authentication information and call information.Type: GrantFiled: March 29, 2001Date of Patent: June 1, 2004Assignee: NEC CorporationInventor: Junichi Koyama
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Patent number: 6735267Abstract: A fuel assembly in accordance with the present invention comprises a plurality of first fuel rods and a plurality of second fuel rods having a length shorter than a length of the first fuel rod, and these two kinds of fuel rods are arranged in a fuel rod array of 10 rows by 10 columns. Two water rods are arranged in regions capable of arranging 8 fuel rods. The second fuel rods are not arranged in the outermost tier of the fuel rod array. Which satisfies the following conditions, that is, B≧60 (Equation 1) 15≦n≦20(n: integer) (Equation 2) Awr/Ach≦0.149 (Equation 3) Lp/Lf≧11/24 (Equation 4) Awr/Ach≧(3.00×10−4×n2+6.00×10−4×n−1.2×10−2)×(Lp/Lf−1)+1.75×10−1 (Equation 5) Awr/Ach≦(8.63×10−4×n2−6.09×10−2×n+1.33×10−1)×(Lp/Lf−8.Type: GrantFiled: August 26, 2002Date of Patent: May 11, 2004Assignee: Hitachi, Ltd.Inventors: Akihito Orii, Junichi Koyama, Koji Nishida, Masao Chaki, Toru Kanazawa
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Publication number: 20030123601Abstract: A fuel assembly in accordance with the present invention comprises a plurality of first fuel rods and a plurality of second fuel rods having a length shorter than a length of the first fuel rod, and these two kinds of fuel rods are arranged in a fuel rod array of 10 rows by 10 columns. Two water rods are arranged in regions capable of arranging 8 fuel rods. The second fuel rods are not arranged in the outermost tier of the fuel rod array.Type: ApplicationFiled: August 26, 2002Publication date: July 3, 2003Applicant: HITACHI, LTDInventors: Akihito Orii, Junichi Koyama, Koji Nishida, Masao Chaki, Toru Kanazawa
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Publication number: 20030105548Abstract: A bending apparatus for bending a workpiece W according to cooperation of a punch P and a die D previously carries out various step bending or makes simulation of step bending, and calculates an approximation formula based on a correlation between a ratio % of a one-sided elongation value &agr; to a plate thickness t and a step bending angle &thgr; based on a relationship among the plate thickness t, the step bending angle &thgr; and the one-sided elongation value &agr; of the workpiece W so as to store the formula as a database. The more accurate one-sided elongation value &agr; of the step bending is calculated by small parameters including only two data including the plate thickness t and the step bending angle &thgr; previously input at the time of actual bending based on the approximation formula in the data base so that the bending is carried out easily.Type: ApplicationFiled: December 30, 2002Publication date: June 5, 2003Inventors: Junichi Koyama, Kazunari Imai, Osamu Hayama, Hitoshi Omata
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Patent number: 6516043Abstract: A fuel assembly includes a plurality of fuel rods placed in a square lattice array of 9-rows/9-columns and at least one water rod. In this fuel assembly, the fuel rod pitch of the plurality of fuel rods is in a range of 14.15 mm to 14.65 mm, and means for offsetting and holding a fuel bundle composed of the fuel rods and the water rod is provided in such a manner that the center in a cross section of the fuel bundle is offset from the center in a cross section of the lower tie plate toward the channel fastener side. With this configuration, it is possible to provide a fuel assembly for a D-lattice core, which is capable of achieving the fuel economy comparable to that of a C-lattice core without reducing the thermal margin, and of using the existing fuel spacers.Type: GrantFiled: December 23, 1999Date of Patent: February 4, 2003Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.Inventors: Masao Chaki, Koji Nishida, Motoo Aoyama, Junichi Koyama, Katsumasa Haikawa, Yasuhiro Aizawa
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Publication number: 20030015011Abstract: An actual plate thickness and actual material constants are measured during punching before bending. The measured information is reflected on the bending, so that the bending is performed efficiently and accurately. Punching is carried out for each blank developed based on a nominal plate thickness and nominal material constants in blanking before the bending of a work W. Then, an actual plate thickness distribution and an actual material constant distribution of the work W are calculated based on various data containing a ram stroke and a pressure detected in the punching.Type: ApplicationFiled: July 17, 2002Publication date: January 23, 2003Inventors: Junichi Koyama, Hitoshi Omata, Osamu Hayama, Kazunari Imai, Tokuro Takehara, Tetsuya Anzai
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Publication number: 20030010078Abstract: At a time of executing a bending process of a work according to a cooperation between a punch and a die, a provisional stroke value for obtaining a predetermined angle is determined on the basis of a bending process condition. A test bending process is executed on the basis of the provisional stroke value, and a striking number required for striking the work until the predetermined angle is obtained is judged. Since a stroke value correction amount at a time of a main bending corresponding to the striking number and the predetermined angle is previously determined, a main bending process is executed by correcting to a stroke value at a time of the main bending by computing the corresponding stroke value correction amount on the basis of the stroke value correction amount at a time of the main bending process.Type: ApplicationFiled: July 17, 2002Publication date: January 16, 2003Inventors: Junichi Koyama, Osamu Hayama, Hitoshi Omata, Kazunari Imai
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Patent number: 6504889Abstract: A method of operating a nuclear reactor reduces the number of reload fuels to be loaded into the nuclear reactor in the second and the following operation cycles. The nuclear reactor has a reactor core in which a plurality of reload fuel assemblies respectively having different infinite multiplication factors are arranged. The method operates the nuclear reactor with control rods inserted in control cells each comprising four reload fuel assemblies having relatively large infinite multiplication factors among the plurality of reload fuel assemblies for a period longer than half of a period of an operation cycle.Type: GrantFiled: September 15, 1999Date of Patent: January 7, 2003Assignee: Hitachi, Ltd.Inventors: Kenmi Narita, Katsumasa Haikawa, Akihiro Yamanaka, Akiko Kanda, Takaaki Mochida, Junichi Yamashita, Junichi Koyama
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Publication number: 20030000269Abstract: In bending a workpiece (W), a position of the workpiece W relatively pressed down by a punch (P) is directly detected by a plurality of position detection means (RDC1, RDC2 and RDC3) provided in a V-groove (11) of a die, and a bending speed calculation section obtains a bending speed from a change in this position. If bending speeds at position of the respective position detection means differ, a uniform speed arithmetic operation section calculates a bending speed to make the bending speeds at the positions of all of the position detection means uniform, and a driving shaft instruction section controls driving shafts (7L, 7R) to bend the workpiece at the uniform bending speed.Type: ApplicationFiled: July 17, 2002Publication date: January 2, 2003Inventors: Junichi Koyama, Kazunari Imai, Hitoshi Omata, Osamu Hayama, Hidekatsu Ikeda
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Patent number: 6491725Abstract: A keyhole button used as a supplement of a keyhole portion formed on a cranium is constituted to have a brim portion having front and back surfaces, and a shaft portion integrally provided on the back surface of the brim portion. The front surface of the brim portion is convexed in a first direction, and concaved in a second direction that is perpendicular to the first direction.Type: GrantFiled: October 19, 2000Date of Patent: December 10, 2002Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Junichi Koyama, Yukio Taniguchi, Takamitsu Yoshida, Yoshiro Imamura
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Publication number: 20020041889Abstract: A cosmetic or dermatological topical preparation contains, as active ingredient, an &agr;-amino acid derivative of the formula (I) 1Type: ApplicationFiled: March 31, 1998Publication date: April 11, 2002Inventors: YOSHIKO MASUDA, JUNKO SATO, JUNICHI KOYAMA
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Patent number: 6335956Abstract: Each of short-length fuel rods 3 is arranged at a position other than in 3×3 corner regions 6 to 9 in such a manner as not to be simultaneously adjacent to a water rod 5 and others of the short-sized fuel rods. Gd fuel rods 4 are arranged at positions excluding the outer periphery, and the number of those of the Gd fuel rods 4 adjacent to the short-length fuel rods 3 is one-half or less the total number of the Gd fuel rods. At a transverse cross-section of a region upward from upper ends of the short-sized fuel rods 3, the amount of burnable poison contained in a polygonal region 10 whose vertexes are located at centers of those of the first fuel rods 3 arranged at the outermost layer is smaller than the amount of burnable poison outside the region 10. With this configuration, a critical power can be improved in consideration of both a distribution of the flow of coolant and a distribution of a thermal power in the fuel assembly.Type: GrantFiled: February 11, 2000Date of Patent: January 1, 2002Assignee: Hitachi, Ltd.Inventors: Junichi Koyama, Motoo Aoyama, Koji Nishida, Junichi Yamashita
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Publication number: 20010027101Abstract: In a mobile communication system, when a mobile visitor terminal registered at a first network enters a second network, it sends a registration signal to a first exchange belonging to the second network. The first exchange sends a roaming start request signal to the first network. On receiving authentication information from the first network, the exchange writes it in a VLR (Visitor Location Register) storage. On the origination of a call on the visitor terminal, call information is written to a call information storage. A third exchange stores in an VLR holding node number storage the fact that the call information is stored in the first exchange. When the visitor terminal moves to the area of a second exchange, the second exchange sees, based on the content of the VLR holding node number storage, that the authentication information is stored in the first exchange, and obtains it. The second exchange switches connection thereto on the basis of the authentication information and call information.Type: ApplicationFiled: March 29, 2001Publication date: October 4, 2001Inventor: Junichi Koyama
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Patent number: 6141396Abstract: Several unit loading patterns are arranged in the central area of an initial core to which the present invention is applied. The unit loading pattern is composed of one square-shaped unit cell and four cross-shaped control rods 3 which surround the unit cell. The unit cell is composed of one low enrichment fuel assembly 7, two high enrichment fuel assemblies 8 and one high enrichment fuel assembly 9. The low enrichment fuel assemblies 7 of each unit loading pattern adjoin each other and are arranged to constitute the first control cell 2a being square-shaped. The high enrichment fuel assemblies 9, obliquely adjoining the low enrichment fuel assembly 7 in each unit loading pattern, adjoin each other and are arranged to constitute the second control cell 2b being square-shaped.Type: GrantFiled: March 2, 1999Date of Patent: October 31, 2000Assignee: Hitachi, Ltd.Inventors: Akiko Kanda, Katsumasa Haikawa, Akihiro Yamanaka, Kenmi Narita, Junichi Yamashita, Junichi Koyama
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Patent number: 6061416Abstract: Each of short-length fuel rods 3 is arranged at a position other than in 3.times.3 corner regions 6 to 9 in such a manner as not to be simultaneously adjacent to a water rod 5 and others of the short-sized fuel rods. Gd fuel rods 4 are arranged at positions excluding the outer periphery, and the number of those of the Gd fuel rods 4 adjacent to the short-length fuel rods 3 is one-half or less the total number of the Gd fuel rods. At a transverse cross-section of a region upward from upper ends of the short-sized fuel rods 3, the amount of burnable poison contained in a polygonal region 10 whose vertexes are located at centers of those of the first fuel rods 3 arranged at the outermost layer is smaller than the amount of burnable poison outside the region 10. With this configuration, a critical power can be improved in consideration of both a distribution of the flow of coolant and a distribution of a thermal power in the fuel assembly.Type: GrantFiled: February 12, 1998Date of Patent: May 9, 2000Assignee: Hitachi, Ltd.Inventors: Junichi Koyama, Motoo Aoyama, Koji Nishida, Junichi Yamashita
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Patent number: 6005905Abstract: In an arrangement of an initial core, the core is loaded with 572 high enrichment fuel assemblies H with 4.2 wt % average enrichment and 300 low enrichment fuel assemblies L with 1.5 wt % average enrichment. The average enrichment of the core is about 3.3 wt %. In this core, only the low enrichment fuel assemblies are loaded into the most outer position of the core and the high enrichment fuel assemblies are loaded into an area other than the most outer position. In this arrangement, the average enrichment of reload fuel assemblies is 3.7 wt %.Type: GrantFiled: June 17, 1996Date of Patent: December 21, 1999Assignee: Hitachi, Ltd.Inventors: Akihiro Yamanaka, Katsumasa Haikawa, Akiko Kanda, Takaaki Mochida, Junichi Yamashita, Motoo Aoyama, Yoko Yuchi, Junichi Koyama
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Patent number: 5857366Abstract: A press brake for bending a sheet-shaped work between an upper tool and a lower die and a method of bending the work are provided. In the method, at first, bending angles at plural positions of the work are measured by a trial bending. Next, based on the bending angles obtained, an engagement positional relation between the upper tool and the lower die is corrected to achieve accurate bending of the work at a target bending angle in order to carry out the method, the press brake includes a control unit for calculating a D value of a distance from a bottom of the lower die to a tip of the upper tool.Type: GrantFiled: January 8, 1997Date of Patent: January 12, 1999Assignee: Amada Company, Ltd.Inventor: Junichi Koyama