Patents by Inventor Hideo Sakai

Hideo Sakai 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).

  • Publication number: 20230311381
    Abstract: By using a forming die having a fixed die and a movable die moving along a parting surface on the fixed die and by moving the movable die along the parting surface, to press and hold a sintered part between the movable die and the fixed die, to form a cavity around the sintered part except parts which abut on the fixed die and the movable die by the forming die, and to fill the cavity with melted material which becomes an exterior part, so that the sintered part and the exterior part are integrated by insert molding.
    Type: Application
    Filed: June 6, 2023
    Publication date: October 5, 2023
    Applicant: DIAMET CORPORATION
    Inventors: Shinichi Takezoe, Tsuneo Maruyama, Hideo Sakai
  • Publication number: 20230033850
    Abstract: By using a forming die having a fixed die and a movable die moving along a parting surface on the fixed die and by moving the movable die along the parting surface, to press and hold a sintered part between the movable die and the fixed die, to form a cavity around the sintered part except parts which abut on the fixed die and the movable die by the forming die, and to fill the cavity with melted material which becomes an exterior part, so that the sintered part and the exterior part are integrated by insert molding.
    Type: Application
    Filed: January 25, 2021
    Publication date: February 2, 2023
    Applicant: DIAMET CORPORATION
    Inventors: Shinichi Takezoe, Tsuneo Maruyama, Hideo Sakai
  • Patent number: 11498127
    Abstract: A die having a cavity and a lower punch fitted into the cavity. The cavity is divided and the parts slide along a division plane passing through the cavity parallel to the fitting direction of the die and the lower punch. The divided cavity parts are placed in a state of alignment along the division plane. The divided cavity parts are each filled with raw material powder. The die and the lower punch are then slid along the division plane, whereby the divided cavity parts are combined as the original cavity. The raw material powder in the cavity in a combined state is compressed by an upper punch and the lower punch.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: November 15, 2022
    Assignee: DIAMET CORPORATION
    Inventors: Tsuneo Maruyama, Shinichi Takezoe, Hideo Sakai
  • Patent number: 11446737
    Abstract: The molding die of the invention includes: a first die having a through-hole; a second die inserted into the through-hole and capable of moving relative to the first die; and a first punch and a second punch each insertable into the through-hole. A cavity surrounded by the second die, the first punch, and the second punch to compression-mold a molding object is formed in the through-hole. An undercut molding part is formed in the surface of the second die facing the cavity. The second die is formed so as to be splittable into two or more split bodies.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: September 20, 2022
    Assignee: Diamet Corporation
    Inventors: Tsuneo Maruyama, Yoshiki Tamura, Hideo Sakai
  • Publication number: 20220001446
    Abstract: A sintered component forming step is for forming a sintered component by powder molding. An insert forming step is for forming a sintered insert component in which an exterior component is integrated on an outer peripheral portion of the sintered component. One or more grooves or ridges are formed on an outer peripheral portion of a region except for one end portion of the sintered component in the sintered component forming step. The insert forming step includes a step for bringing the outer peripheral portion of the end portion into contact with an inner peripheral surface of an insert forming mold along a circumferential direction and covering the one or more grooves or ridges by the insert forming mold with an interval to form a cavity on an outer peripheral portion of the sintered component and a step for filling a melted material in the cavity.
    Type: Application
    Filed: February 21, 2020
    Publication date: January 6, 2022
    Applicant: DIAMET CORPORATION
    Inventors: Tsuneo Maruyama, Shinichi Takezoe, Hideo Sakai
  • Patent number: 10908595
    Abstract: A device includes a catalog storage unit that stores a catalog having versatility; a catalog control unit that specifies the catalog corresponding to a target machine tool to be subjected to state determination based on machine tool information including an item of facility type and acquires the catalog from the catalog storage unit; a feature quantity extraction unit that extracts a feature quantity from sensor data detected from the target machine tool; a sensor data processing unit that performs state determination of the target machine tool based on the feature quantity distribution included in the acquired catalog and the feature quantity extracted from the sensor data; a feature quantity tuning unit that performs tuning of the feature quantity distribution by mapping the extracted feature quantity to the feature quantity distribution; and a catalog updating unit that updates the catalog based on the feature quantity distribution after tuning.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: February 2, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Yuichi Sakurai, Masaaki Maeda, Masayoshi Takahashi, Hideo Sakai
  • Patent number: 10843264
    Abstract: A molding die includes a first die having a through-hole; a second die inserted into the through-hole and configured to be movable relative to the first die; and first and second punches configured to be insertable into the through-hole, wherein an undercut molding part is provided on the second die, and a molding target is compression-molded in a cavity surrounded by inner side walls of the through-hole, the second die, the first punch, and the second punch.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: November 24, 2020
    Assignee: Diamet Corporation
    Inventors: Tsuneo Maruyama, Yoshiki Tamura, Hideo Sakai
  • Patent number: 10845794
    Abstract: A state identification device includes: a feature amount extraction unit that extracts a feature amount from physical data of a machine tool unit which shifts to a plurality of operation states; a feature amount storage unit in which a region is provided as a storage destination of the extracted feature amount for each of the plurality of operation states to which the machine tool unit shifts; a similarity calculation unit that calculates a similarity between the extracted feature amount and a feature amount stored in the feature amount storage unit; a state determination unit that determines an operation state of the machine tool unit based on the calculated similarity; and a storage destination determination unit that determines the region serving as the storage destination of the extracted feature amount based on a determination result of the state determination unit.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: November 24, 2020
    Assignee: HITACHI, LTD.
    Inventors: Hideo Sakai, Masaaki Maeda, Yuichi Sakurai, Masayoshi Takahashi
  • Patent number: 10731704
    Abstract: The oil-impregnated sintered bearing of the present invention is an oil-impregnated sintered bearing having a Fe—Cu-based sintered body being impregnated with, a bearing hole being formed in the Fe—Cu-based sintered body and configured to be penetrated by and support a rotating shaft, in which an inner circumferential surface of the bearing hole includes a first region forming a central portion in a shaft direction, a second region from a first end portion of the first region to a first opening of the bearing hole, and a third region from a second end portion of the first region to a second opening of the bearing hole, and an area ratio of the Cu phase of the second region in a center along the shaft direction is 80% or more and 100% or less of an area ratio of the Cu phase of the third region in a center along the shaft direction.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: August 4, 2020
    Assignee: Diamet Corporation
    Inventors: Yoshiki Tamura, Hideo Sakai, Osamu Sakai
  • Publication number: 20200049198
    Abstract: The oil-impregnated sintered bearing of the present invention is an oil-impregnated sintered bearing having a Fe—Cu-based sintered body being impregnated with, a bearing hole being formed in the Fe—Cu-based sintered body and configured to be penetrated by and support a rotating shaft, in which an inner circumferential surface of the bearing hole includes a first region forming a central portion in a shaft direction, a second region from a first end portion of the first region to a first opening of the bearing hole, and a third region from a second end portion of the first region to a second opening of the bearing hole, and an area ratio of the Cu phase of the second region in a center along the shaft direction is 80% or more and 100% or less of an area ratio of the Cu phase of the third region in a center along the shaft direction.
    Type: Application
    Filed: October 18, 2017
    Publication date: February 13, 2020
    Applicant: Diamet Corporation
    Inventors: Yoshiki TAMURA, Hideo SAKAI, Osamu SAKAI
  • Publication number: 20190384268
    Abstract: A device includes a catalog storage unit that stores a catalog having versatility; a catalog control unit that specifies the catalog corresponding to a target machine tool to be subjected to state determination based on machine tool information including an item of facility type and acquires the catalog from the catalog storage unit; a feature quantity extraction unit that extracts a feature quantity from sensor data detected from the target machine tool; a sensor data processing unit that performs state determination of the target machine tool based on the feature quantity distribution included in the acquired catalog and the feature quantity extracted from the sensor data; a feature quantity tuning unit that performs tuning of the feature quantity distribution by mapping the extracted feature quantity to the feature quantity distribution; and a catalog updating unit that updates the catalog based on the feature quantity distribution after tuning.
    Type: Application
    Filed: April 26, 2019
    Publication date: December 19, 2019
    Inventors: Yuichi SAKURAI, Masaaki Maeda, Masayoshi Takahashi, Hideo Sakai
  • Publication number: 20190344349
    Abstract: The molding die of the invention includes: a first die having a through-hole; a second die inserted into the through-hole and capable of moving relative to the first die; and a first punch and a second punch each insertable into the through-hole. A cavity surrounded by the second die, the first punch, and the second punch to compression-mold a molding object is formed in the through-hole. An undercut molding part is formed in the surface of the second die facing the cavity. The second die is formed so as to be splittable into two or more split bodies.
    Type: Application
    Filed: August 15, 2017
    Publication date: November 14, 2019
    Applicant: Diamet Corporation
    Inventors: Tsuneo MARUYAMA, Yoshiki TAMURA, Hideo SAKAI
  • Publication number: 20190324428
    Abstract: A state identification device includes: a feature amount extraction unit that extracts a feature amount from physical data of a machine tool unit which shifts to a plurality of operation states; a feature amount storage unit in which a region is provided as a storage destination of the extracted feature amount for each of the plurality of operation states to which the machine tool unit shifts; a similarity calculation unit that calculates a similarity between the extracted feature amount and a feature amount stored in the feature amount storage unit; a state determination unit that determines an operation state of the machine tool unit based on the calculated similarity; and a storage destination determination unit that determines the region serving as the storage destination of the extracted feature amount based on a determination result of the state determination unit.
    Type: Application
    Filed: April 12, 2019
    Publication date: October 24, 2019
    Applicant: HITACHI, LTD.
    Inventors: Hideo SAKAI, Masaaki MAEDA, Yuichi SAKURAI, Masayoshi TAKAHASHI
  • Publication number: 20190232374
    Abstract: A die having a cavity and a lower punch fitted into the cavity. The cavity is divided and the parts slide along a division plane passing through the cavity parallel to the fitting direction of the die and the lower punch. The divided cavity parts are placed in a state of alignment along the division plane. The divided cavity parts are each filled with raw material powder. The die and the lower punch are then slid along the division plane, whereby the divided cavity parts are combined as the original cavity. The raw material powder in the cavity in a combined state is compressed by an upper punch and the lower punch.
    Type: Application
    Filed: August 10, 2017
    Publication date: August 1, 2019
    Applicant: DIAMET CORPORATION
    Inventors: Tsuneo MARUYAMA, Shinich TAKEZOE, Hideo SAKAI
  • Publication number: 20190091767
    Abstract: A molding die includes a first die having a through-hole; a second die inserted into the through-hole and configured to be movable relative to the first die; and first and second punches configured to be insertable into the through-hole, wherein an undercut molding part is provided on the second die, and a molding target is compression-molded in a cavity surrounded by inner side walls of the through-hole, the second die, the first punch, and the second punch.
    Type: Application
    Filed: March 3, 2017
    Publication date: March 28, 2019
    Applicant: Diamet Corporation
    Inventors: Tsuneo MARUYAMA, Yoshiki TAMURA, Hideo SAKAI
  • Patent number: 10184790
    Abstract: The presently disclosed subject matter provides a pattern measurement method and device for achieving highly accurate measurement in the depth direction of a pattern. The method involves a focused ion beam irradiated to form an inclined surface in a sample area; a field of view of a SEM set to include the boundary between the inclined surface and a sample surface; and an image of the field of view obtained on the basis of a detection signal. Such an acquired image is used to specify a first position, the boundary between inclined surface and non-inclined surface, and a second position, the position of a desired deep hole or deep groove positioned within the inclined surface. The pattern dimension in a height direction is determined on the basis of the distance in the sample surface direction between the first position and second position and the angle of the inclined surface.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: January 22, 2019
    Assignee: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Hiroki Kawada, Hideo Sakai, Katsuhiro Sasada
  • Patent number: 9934940
    Abstract: There is provided a control device for controlling a charged particle beam apparatus, wherein the beam apparatus comprises a workpiece stage having at least two turning axes which are not parallel to each other and an irradiation unit, and the control device comprises an angle calculation unit that based on a direction of a first processing in which a processed surface having a normal line not parallel to any of the turning axes is generated in the workpiece by the irradiation unit and a direction of a second processing to be processed by the irradiation unit from a direction different from the direction of the first processing with respect to the processed surface to be generated by the first processing, calculates turning angles about the turning axes that changes the direction of the stage from the direction of the first processing to the direction of the second processing.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: April 3, 2018
    Assignee: Hitachi High-Tech Science Corporation
    Inventors: Satoshi Tomimatsu, Tsuyoshi Oonishi, Hiroki Kawada, Hideo Sakai
  • Publication number: 20170278673
    Abstract: There is provided a control device for controlling a charged particle beam apparatus, wherein the beam apparatus comprises a workpiece stage having at least two turning axes which are not parallel to each other and an irradiation unit, and the control device comprises an angle calculation unit that based on a direction of a first processing in which a processed surface having a normal line not parallel to any of the turning axes is generated in the workpiece by the irradiation unit and a direction of a second processing to be processed by the irradiation unit from a direction different from the direction of the first processing with respect to the processed surface to be generated by the first processing, calculates turning angles about the turning axes that changes the direction of the stage from the direction of the first processing to the direction of the second processing.
    Type: Application
    Filed: March 24, 2017
    Publication date: September 28, 2017
    Applicant: HITACHI HIGH-TECH SCIENCE CORPORATION
    Inventors: Satoshi Tomimatsu, Tsuyoshi Oonishi, Hiroki Kawada, Hideo Sakai
  • Publication number: 20170138725
    Abstract: The presently disclosed subject matter provides a pattern measurement method and device for achieving highly accurate measurement in the depth direction of a pattern. The method involves a focused ion beam irradiated to form an inclined surface in a sample area; a field of view of a SEM set to include the boundary between the inclined surface and a sample surface; and an image of the field of view obtained on the basis of a detection signal. Such an acquired image is used to specify a first position, the boundary between inclined surface and non-inclined surface, and a second position, the position of a desired deep hole or deep groove positioned within the inclined surface. The pattern dimension in a height direction is determined on the basis of the distance in the sample surface direction between the first position and second position and the angle of the inclined surface.
    Type: Application
    Filed: May 11, 2015
    Publication date: May 18, 2017
    Applicant: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Hiroki Kawada, Hideo Sakai, Katsuhiro Sasada
  • Patent number: 9299382
    Abstract: A method of manufacturing a glass substrate for a magnetic disk includes a polishing step of polishing a main surface of a glass substrate by sandwiching the glass substrate between a pair of surface plates each having a polishing pad on its surface and by supplying a polishing liquid containing polishing abrasive particles between the glass substrate and the polishing pads. In the polishing step, the polishing liquid and each polishing pad are adjusted so that the friction coefficient falls in a range of 0.02 to 0.05.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: March 29, 2016
    Assignee: HOYA CORPORATION
    Inventors: Hideo Sakai, Yoshihiro Tawara