Patents by Inventor Seiichi Tomita

Seiichi Tomita 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: 11390021
    Abstract: A method for producing a three-dimensional shaped product based on repetition of a step of molding of a powder layer 3 and sintering with a laser beam or an electron beam, wherein in a lattice region 1, a sintered layer 41 is molded by scanning the beam having a predetermined spot diameter several times in one side direction at a predetermined interval, after which a sintered layer 42 is again molded by the same scanning in the other side direction which crosses the one side direction, and in an outer frame region 2, a continuous sintered layer 43 is molded by scanning the beam having the predetermined spot diameter over the entire lattice region 1 that is surrounded by an inner line and an outer line, and is also achieved by a three-dimensional shaped product obtained by the method.
    Type: Grant
    Filed: April 30, 2021
    Date of Patent: July 19, 2022
    Assignee: Matsuura Machinery Corp.
    Inventors: Koichi Amaya, Midorikawa Tetsushi, Seiichi Tomita, Ryuzo Tanaka
  • Publication number: 20220097297
    Abstract: A method for producing a three-dimensional shaped product based on repetition of a step of molding of a powder layer 3 and sintering with a laser beam or an electron beam, wherein in a lattice region 1, a sintered layer 41 is molded by scanning the beam having a predetermined spot diameter several times in one side direction at a predetermined interval, after which a sintered layer 42 is again molded by the same scanning in the other side direction which crosses the one side direction, and in an outer frame region 2, a continuous sintered layer 43 is molded by scanning the beam having the predetermined spot diameter over the entire lattice region 1 that is surrounded by an inner line and an outer line, and is also achieved by a three-dimensional shaped product obtained by the method.
    Type: Application
    Filed: April 30, 2021
    Publication date: March 31, 2022
    Inventors: Koichi Amaya, Midorikawa Tetsushi, Seiichi Tomita, Ryuzo Tanaka
  • Patent number: 11141920
    Abstract: A method for producing a three-dimensional shaped product that employs a shaping method based on dispersion of powder by a squeegee and irradiation onto a powder layer with a laser beam or electron beam, includes the following steps: 1. Setting an upper limit value and lower limit value for the amount of circulation passing through an anemometer, and an adjusting value within this range; 2. Measuring the amount of circulation and effecting control as follows: (1) When the measured value is between the upper limit value and lower limit value, the rotational speed of the blower fan is maintained, and (2) When the measured value has fallen below the lower limit value due to clogging of a filter, the rotational speed of the fan is increased and the rotational speed is selected at the stage where the measured value has reached the adjusting value, and the rotational speed is maintained.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: October 12, 2021
    Assignee: Matsuura Machinery Corporation
    Inventors: Koichi Amaya, Mitsuyoshi Yoshida, Seiichi Tomita, Akira Takizawa, Akishige Nishikawa
  • Patent number: 11117317
    Abstract: A shaping method for a three-dimensional shaped product, including the following steps: 1. Setting a traveling distance of the squeegee to be a short distance that does not reach a chamber wall section, 2. Establishing location of wall layers connecting both ends at the chamber wall sections in a direction perpendicular to the traveling direction of the squeegee, within a traveling range based on the set traveling distance, or connecting to the ends on a powder feeder side at inner side of the chamber wall sections by a region to be sintered, from both sides of the region, 3. Forming powder layers by movement of the squeegee over the set traveling distance, 4. Forming sintered layers by irradiation with a beam on the formed powder layers, and forming wall layers by irradiation with a beam at the locations of the established wall layers, 5. Repeating steps 3 and 4.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: September 14, 2021
    Assignee: Matsuura Machinery Corp.
    Inventor: Seiichi Tomita
  • Publication number: 20210213537
    Abstract: The three-dimensional shaping method and apparatus employs a plurality of galvano scanners 3 that carry out scanning of laser beams 7 along two-dimensional directions on orthogonal coordinates or cylindrical coordinates by reflection from first mirrors 31 that oscillate on rotation axes 30 that are perpendicular to transmission directions of the laser beams 7 that have been transmitted through dynamic focus lenses 2, and second mirrors 32 that oscillate on rotation axes 30 that are perpendicular to the rotation axes 30 of the first mirrors 31 and are in horizontal directions, with oscillation ranges freely adjustable based on control of an oscillation, and having freely selectable regions on a sintered surface 6 at the focal points of the laser beams 7 irradiated in slanted directions with respect to a surface of a table 4, or locations in their vicinity.
    Type: Application
    Filed: May 19, 2020
    Publication date: July 15, 2021
    Inventors: Koichi Amaya, Mitsuyoshi Yoshida, Seiichi Tomita, Shota Sasaki
  • Patent number: 10946582
    Abstract: A method for producing a three-dimensional shaped product based on dispersion of powder by a squeegee and irradiation of the powder layer with a laser beam or electron beam, including the steps of installing a suction device that suctions fumes generated from the powder layer, in a state surrounding the entire periphery of a shaping table, and selecting a suction reference position at the shortest distance from the irradiation reference position currently moved and worked in a prescribed time range.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: March 16, 2021
    Assignee: Matsuura Machinery Corporation
    Inventors: Kouichi Amaya, Seiichi Tomita
  • Publication number: 20210001557
    Abstract: A method for producing a three-dimensional shaped product that employs a shaping method based on dispersion of powder by a squeegee and irradiation onto a powder layer with a laser beam or electron beam, includes the following steps: 1. Setting an upper limit value and lower limit value for the amount of circulation passing through an anemometer, and an adjusting value within this range; 2. Measuring the amount of circulation and effecting control as follows: (1) When the measured value is between the upper limit value and lower limit value, the rotational speed of the blower fan is maintained, and (2) When the measured value has fallen below the lower limit value due to clogging of a filter, the rotational speed of the fan is increased and the rotational speed is selected at the stage where the measured value has reached the adjusting value, and the rotational speed is maintained.
    Type: Application
    Filed: March 27, 2020
    Publication date: January 7, 2021
    Inventors: Koichi Amaya, Mitsuyoshi Yoshida, Seiichi Tomita, Akira Takizawa, Akishige Nishikawa
  • Publication number: 20200276754
    Abstract: A method for producing a three-dimensional shaped product based on dispersion of powder by a squeegee and irradiation of the powder layer with a laser beam or electron beam, including the steps of installing a suction device that suctions fumes generated from the powder layer, in a state surrounding the entire periphery of a shaping table, and selecting a suction reference position at the shortest distance from the irradiation reference position currently moved and worked in a prescribed time range.
    Type: Application
    Filed: November 1, 2019
    Publication date: September 3, 2020
    Inventors: Kouichi Amaya, Seiichi Tomita
  • Publication number: 20200254684
    Abstract: A shaping method for a three-dimensional shaped product, including the following steps: 1. Setting a traveling distance of the squeegee to be a short distance that does not reach a chamber wall section, 2. Establishing location of wall layers connecting both ends at the chamber wall sections in a direction perpendicular to the traveling direction of the squeegee, within a traveling range based on the set traveling distance, or connecting to the ends on a powder feeder side at inner side of the chamber wall sections by a region to be sintered, from both sides of the region, 3. Forming powder layers by movement of the squeegee over the set traveling distance, 4. Forming sintered layers by irradiation with a beam on the formed powder layers, and forming wall layers by irradiation with a beam at the locations of the established wall layers, 5. Repeating steps 3 and 4.
    Type: Application
    Filed: October 31, 2019
    Publication date: August 13, 2020
    Inventor: Seiichi Tomita
  • Publication number: 20150283612
    Abstract: Three-dimensional molding equipment alternately repeats a laminating process forming a powder layer by powder supply equipment and a sintering process radiating a beam to the powder layer by a plurality of beam scanning equipment and further moving a radiated location with respective predetermined moving units set by a central control unit to sinter the powder layer, wherein a plurality of the beams by the beam scanning equipment are radiated on the same powder layer, and the radiated locations by the beam scanning equipment are synchronously moved in increments of moving units, the plurality of beam scanning equipment includes at least one beam scanning equipment for a large-diameter region forming at least one large-diameter radiated region on the powder layer surface; and at least one beam scanning equipment for a small-diameter region, forming at least one small-diameter radiated region having a smaller diameter on the powder layer surface.
    Type: Application
    Filed: November 29, 2014
    Publication date: October 8, 2015
    Inventors: Toshio Maeda, Seiichi Tomita, Yasunori Takezawa, Toshihiko Kato, Koichi Amaya
  • Patent number: 8495278
    Abstract: A controller includes an instruction table memory, a program counter, a first decoder, and a first executing unit. The instruction table memory stores an instruction code obtained by coding a sequence to access a nonvolatile semiconductor memory. A read address in the instruction table memory is set to the program counter. The first decoder decodes the instruction code read from the instruction table memory to output a first decode signal. The first executing unit executes access to the nonvolatile semiconductor memory on the basis of the first decode signal output from the first decoder.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: July 23, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tarou Iwashiro, Takahide Nishiyama, Seiichi Tomita
  • Patent number: 7867431
    Abstract: Prior to molding, an initial position of at least one movable reference mark, provided in the vicinity of an object of manufacture, is measured by a first position measuring means, and the initial position of the movable reference mark is measured by a second position measuring means provided in a processing means. During the course of molding, measurement of a position of the movable reference mark is carried out by the first position measuring means and the second position measuring means. Then, based on the initial position of the movable reference mark prior to molding and the position of the movable reference mark measured by the first and second position measuring means during the course of molding, an optical beam irradiating position of an optical beam and a processing position of the processing means are corrected.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: January 11, 2011
    Assignees: Matsuura Machinery Corporation, Panasonic Electric Works Co., Ltd.
    Inventors: Yoshikazu Higashi, Hirohiko Togeyama, Satoshi Abe, Isao Fuwa, Seiichi Tomita, Toshio Maeda, Norio Takinami
  • Publication number: 20100241791
    Abstract: A controller includes an instruction table memory, a program counter, a first decoder, and a first executing unit. The instruction table memory stores an instruction code obtained by coding a sequence to access a nonvolatile semiconductor memory. A read address in the instruction table memory is set to the program counter. The first decoder decodes the instruction code read from the instruction table memory to output a first decode signal. The first executing unit executes access to the nonvolatile semiconductor memory on the basis of the first decode signal output from the first decoder.
    Type: Application
    Filed: September 4, 2009
    Publication date: September 23, 2010
    Inventors: Tarou Iwashiro, Takahide Nishiyama, Seiichi Tomita
  • Publication number: 20070252309
    Abstract: Prior to molding, an initial position of at least one movable reference mark, provided in the vicinity of an object of manufacture, is measured by a first position measuring means, and the initial position of the movable reference mark is measured by a second position measuring means provided in a processing means. During the course of molding, measurement of a position of the movable reference mark is carried out by the first position measuring means and the second position measuring means. Then, based on the initial position of the movable reference mark prior to molding and the position of the movable reference mark measured by the first and second position measuring means during the course of molding, an optical beam irradiating position of an optical beam and a processing position of the processing means are corrected.
    Type: Application
    Filed: May 25, 2005
    Publication date: November 1, 2007
    Applicants: MATSUSHITA ELECTRIC WORKS, LTD., MATSUURA MACHINERY CORPORATION
    Inventors: Yoshikazu Higashi, Hirohiko Togeyama, Satoshi Abe, Isao Fuwa, Seiichi Tomita, Toshio Maeda, Norio Takinami
  • Patent number: 7073085
    Abstract: To provide a semiconductor circuit device including a synchronous frequency divider which counts input clock signals and outputs a counted value, a selector circuit which receives signals of bits of the counted value output from the synchronous frequency divider and outputs a carry look-ahead signal of predetermined bits as an operation-processing effective-state signal in accordance with a selector signal, and an integrated circuit portion which uses a clock signal input to the synchronous frequency divider as a source clock and whose operating frequency is switched in accordance with the operation-processing effective-state signal.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: July 4, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Seiichi Tomita
  • Patent number: 6915222
    Abstract: A semiconductor integrated circuit according to an aspect of the invention comprises a first storage circuit, second storage circuit, adder circuit, timer, first comparator circuit and waveform-generating circuit. The first storage circuit stores a first value used to set a dead time. The second storage circuit stores a second value used to set a pulse width. The adder circuit adds the first value stored in the first storage circuit and the second value stored in the second storage circuit, thereby outputting an addition result. The timer measures an elapsed time and outputs a count value indicative of the elapsed time. The first comparator circuit compares the count value output from the timer with the addition result output from the adder circuit. The waveform-generating circuit generates a pulse on the basis of a comparison result of the first comparator circuit.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: July 5, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Seiichi Tomita
  • Publication number: 20050005182
    Abstract: To provide a semiconductor circuit device including a synchronous frequency divider which counts input clock signals and outputs a counted value, a selector circuit which receives signals of bits of the counted value output from the synchronous frequency divider and outputs a carry look-ahead signal of predetermined bits as an operation-processing effective-state signal in accordance with a selector signal, and an integrated circuit portion which uses a clock signal input to the synchronous frequency divider as a source clock and whose operating frequency is switched in accordance with the operation-processing effective-state signal.
    Type: Application
    Filed: July 2, 2003
    Publication date: January 6, 2005
    Inventor: Seiichi Tomita
  • Publication number: 20040260696
    Abstract: An object of the present invention is to provide a job management method for making it possible to reuse jobs in an ETL process. In the job management method, a job information table is accessed, jobs having table attributes and data field attributes matching between the respective jobs are retrieved, and, for each retrieved job, matching degrees of the data field attribute of “other jobs” in which the matching has been confirmed are calculated. Then, the “other jobs” in which the calculated matching degrees is equal to or more than a predetermined level are identified, and the identified “other jobs” are outputted to an output interface.
    Type: Application
    Filed: December 19, 2003
    Publication date: December 23, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Takeshi Matsuoka, Fumihiko Iwabuchi, Shinichi Akiba, Etsuji Oku, Tsuyoshi Soejima, Seiichi Tomita, Masakazu Sato
  • Publication number: 20040051577
    Abstract: A semiconductor integrated circuit according to an aspect of the invention comprises a first storage circuit, second storage circuit, adder circuit, timer, first comparator circuit and waveform-generating circuit. The first storage circuit stores a first value used to set a dead time. The second storage circuit stores a second value used to set a pulse width. The adder circuit adds the first value stored in the first storage circuit and the second value stored in the second storage circuit, thereby outputting an addition result. The timer measures an elapsed time and outputs a count value indicative of the elapsed time. The first comparator circuit compares the count value output from the timer with the addition result output from the adder circuit. The waveform-generating circuit generates a pulse on the basis of a comparison result of the first comparator circuit.
    Type: Application
    Filed: June 27, 2003
    Publication date: March 18, 2004
    Inventor: Seiichi Tomita
  • Publication number: 20030018538
    Abstract: Sales of products including consumables and supply parts often involve brokers or intermediary agents who interface consumers and manufacturers. A sales broker system and method of intermediating goods facilitate joint purchases of products, provide manufactures and suppliers with information on market accumulated by the sales brokers, as well as distribute sales information on new products. The joint purchase is managed by the intermediary in an efficient manner so that the consumer unit price is reduced. The market information is also managed by the intermediary so that the manufacturers enjoy accurate sales information based upon actual deliveries. Finally, the intermediary also facilitate to transmit the information on new products to target or potential clients.
    Type: Application
    Filed: December 10, 2001
    Publication date: January 23, 2003
    Inventors: Seiichi Tomita, Fumihiko Iwabuchi, Tomihiko Kakuta, Yukio Hayashi