Patents by Inventor Kenta SAKAI
Kenta 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).
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Publication number: 20240166313Abstract: A floating body (4) for a spar-type offshore wind power generation facility floating sideways is raised by injecting ballast water at sea, by steps including a first step of decentering a center of gravity of the floating body for the spar-type offshore wind power generation facility by means of a center-of-gravity decentering device, and a second step of injecting the ballast water to raise upright the floating body for the spar-type offshore wind power generation facility. The center-of-gravity decentering device may be a weight (2) attached to an outer surface of the floating body, or a solid ballast (34) introduced in the floating body.Type: ApplicationFiled: March 25, 2022Publication date: May 23, 2024Inventors: Tomoaki UTSUNOMIYA, Iku SATO, Kouji TANAKA, Yasuhiro SHINKAWA, Kenta SAKAI
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Patent number: 9557165Abstract: The present invention provides a method for measuring an end portion shape of a threaded pipe or tube P, the method including: a thread axis detection step; a laser light positioning step; a laser light image capture step; and a shape calculation step. In the laser light positioning step, the light source 1 and the image capture device 2 are moved together so that: the optical axis LA of the light source is located so as to pass through a measurement point D (X1, Y1, Z1) on the thread axis A, the measurement point being located in the measurement target region within a plane NP including the thread axis; and the laser light L extends in a slit-like form within the plane.Type: GrantFiled: December 27, 2012Date of Patent: January 31, 2017Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenta Sakai, Tatsuro Honda, Seiji Hiraoka
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Patent number: 9267900Abstract: The present invention provides a method for automatically measuring a thread element at an end portion of a pipe or tube P after thread processing, on a thread processing line 100 in which thread processing is performed on the end portion of each pipe or tube P which is successively conveyed, comprising: a cleaning step of cleaning the end portion of the pipe or tube by a thread cleaning apparatus 30 after the thread processing; a drying step of drying the end portion of the pipe or tube P cleaned in the cleaning step by a thread drying apparatus 40; and a measuring step of measuring the thread element at the end portion of the pipe or tube P by an automatic thread element measurement 50 after drying, wherein the end portion of the pipe or tube is put under a clean atmosphere at least in the measuring step.Type: GrantFiled: September 13, 2011Date of Patent: February 23, 2016Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenta Sakai, Tatsuro Honda, Seiji Hiraoka
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Patent number: 9121833Abstract: A defect inspecting apparatus includes a first light source, a first image capture device that receives the reflection light emitted from the first light source and reflected by the outer peripheral surface of a lip part to grab the image of the outer peripheral surface of the lip part, a second light source, a second image capture device 8 that receives the reflection light emitted from the second light source and reflected by a load face to grab the image of the load face, a third light source, a third image capture device that receives the reflection light emitted from the third light source and reflected by a thread bottom face inspection zone 106 to grab the image of the thread bottom face inspection zone, and an inspection device for inspecting defects by processing the captured images grabbed by the first to third image capture devices.Type: GrantFiled: July 17, 2012Date of Patent: September 1, 2015Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kazunori Anayama, Toshiyuki Suzuma, Yoshiyuki Nakao, Masami Ikeda, Kenta Sakai
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Publication number: 20140355004Abstract: The present invention provides a method for measuring an end portion shape of a threaded pipe or tube P, the method including: a thread axis detection step; a laser light positioning step; a laser light image capture step; and a shape calculation step. In the laser light positioning step, the light source 1 and the image capture device 2 are moved together so that: the optical axis LA of the light source is located so as to pass through a measurement point D (X1, Y1, Z1) on the thread axis A, the measurement point being located in the measurement target region within a plane NP including the thread axis; and the laser light L extends in a slit-like form within the plane.Type: ApplicationFiled: December 27, 2012Publication date: December 4, 2014Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenta Sakai, Tatsuro Honda, Seiji Hiraoka
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Publication number: 20140226154Abstract: The present invention provides a method for automatically measuring a thread element at an end portion of a pipe or tube P after thread processing, on a thread processing line 100 in which thread processing is performed on the end portion of each pipe or tube P which is successively conveyed, comprising: a cleaning step of cleaning the end portion of the pipe or tube by a thread cleaning apparatus 30 after the thread processing; a drying step of drying the end portion of the pipe or tube P cleaned in the cleaning step by a thread drying apparatus 40; and a measuring step of measuring the thread element at the end portion of the pipe or tube P by an automatic thread element measurement 50 after drying, wherein the end portion of the pipe or tube is put under a clean atmosphere at least in the measuring step.Type: ApplicationFiled: September 13, 2011Publication date: August 14, 2014Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenta Sakai, Tatsuro Honda, Seiji Hiraoka
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Patent number: 8438926Abstract: The present invention provides a method which allows simply, easily and accurately evaluating the fastening state of shoulder parts of a threaded joint for use as a joint of pipes or tubes, such as OCTG, during fastening or after fastening. The fastening state evaluation method for a threaded joint 100 of pipes or tubes according to the present invention is characterized in that it transmits ultrasonic surface waves from the internal surface of either one of the pin 1 and the box 2 toward the internal surface of the other one of the pin 1 and the box 2 through the shoulder parts 13, 23 of the pin 1 and the box 2, and on the basis of the transmitted wave intensity or the reflected wave intensity thereof, determines whether or not the fastening state of the threaded joint 100 is satisfactory.Type: GrantFiled: September 22, 2011Date of Patent: May 14, 2013Assignee: Nippon Steel & Sumitomo Metal CorporationInventors: Ikuji Hoshino, Masaki Yamano, Makoto Sakamoto, Keiichi Nakamura, Jun Masubuchi, Kenta Sakai
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Publication number: 20120327217Abstract: A defect inspecting apparatus includes a first light source, a first image capture device that receives the reflection light emitted from the first light source and reflected by the outer peripheral surface of a lip part to grab the image of the outer peripheral surface of the lip part, a second light source, a second image capture device 8 that receives the reflection light emitted from the second light source and reflected by a load face to grab the image of the load face, a third light source, a third image capture device that receives the reflection light emitted from the third light source and reflected by a thread bottom face inspection zone 106 to grab the image of the thread bottom face inspection zone, and an inspection device for inspecting defects by processing the captured images grabbed by the first to third image capture devices.Type: ApplicationFiled: July 17, 2012Publication date: December 27, 2012Applicant: SUMITOMO METAL INDUSTRIES, LTD.Inventors: Kazunori ANAYAMA, Toshiyuki SUZUMA, Yoshiyuki NAKAO, Masami IKEDA, Kenta SAKAI
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Publication number: 20120067127Abstract: The present invention provides a method which allows simply, easily and accurately evaluating the fastening state of shoulder parts of a threaded joint for use as a joint of pipes or tubes, such as OCTG, during fastening or after fastening. The fastening state evaluation method for a threaded joint 100 of pipes or tubes according to the present invention is characterized in that it transmits ultrasonic surface waves from the internal surface of either one of the pin 1 and the box 2 toward the internal surface of the other one of the pin 1 and the box 2 through the shoulder parts 13, 23 of the pin 1 and the box 2, and on the basis of the transmitted wave intensity or the reflected wave intensity thereof, determines whether or not the fastening state of the threaded joint 100 is satisfactory.Type: ApplicationFiled: September 22, 2011Publication date: March 22, 2012Applicant: SUMITOMO METAL INDUSTRIES, LTD.Inventors: Ikuji HOSHINO, Masaki YAMANO, Makoto SAKAMOTO, Keiichi NAKAMURA, Jun MASUBUCHI, Kenta SAKAI
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Publication number: 20120034376Abstract: An apparatus which can thinly and uniformly apply a highly viscous lubricant on the threaded portion of a threaded joint for pipes comprises a steel pipe support unit which supports a steel pipe P having a pin while rotating the pipe, a lubricant circulation system in which a lubricant having its viscosity adjusted so as to be sprayable is circulated, a metering unit having a metering pump capable of metering the lubricant, a lubricant spraying unit having spray guns for spraying lubricant through nozzles toward the pin, a spray gun support unit which supports the spray guns so as to be movable in the axial and/or radial directions of the steel pipe P; and a controlling unit which controls the rotational speed of the steel pipe P by the steel pipe support unit and the speeds of movement of the spray guns by the spray gun support unit.Type: ApplicationFiled: September 26, 2011Publication date: February 9, 2012Applicants: VALLOUREC MANNESMANN OIL & GAS FRANCE, SUMITOMO METAL INDUSTRIES, LTD.Inventors: Takumi NAKAMURA, Kenta SAKAI, Jun MASUBUCHI, Yusuke HIRAISHI