Patents by Inventor Keijiro Maki

Keijiro Maki 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: 9790956
    Abstract: There is provided a turbocharger bearing housing having no necessity to use a core and capable of achieving cost reduction. A bearing housing of a turbocharger contains a shaft connecting a turbine and a compressor and turnably supports the shaft. The bearing housing of the turbocharger is divided into a turbine-side housing disposed at a turbine side and a compressor-side housing disposed at a compressor side. The turbine-side housing and the compressor-side housing is subjected to machining to thereby form a cooling water passage for supplying cooling water and a lubricating oil passage for supplying lubricating oil.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: October 17, 2017
    Assignee: TAIHO KOGYO CO., LTD.
    Inventors: Kenichiro Takama, Satoru Kanbara, Keijiro Maki, Ryuji Naruse
  • Patent number: 9746002
    Abstract: There is provided a turbocharger which can reduce whirl vibration. The turbocharger includes a shaft connecting a turbine and a compressor, a bearing housing having a bearing portion turnably supporting the shaft, and a sliding bearing interposed between the shaft and the bearing portion. The bearing portion is formed of an aluminum-based material, the shaft is formed of a steel material, and the sliding bearing is formed of a copper-based material.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: August 29, 2017
    Assignee: TAIHO KOGYO CO., LTD.
    Inventors: Kenichiro Takama, Satoru Kanbara, Keijiro Maki, Ryuji Naruse
  • Patent number: 9581172
    Abstract: There is provided a method for manufacturing a turbocharger bearing housing which can prevent a collapsible core from being damaged when molten metal is cast in the mold. The method for manufacturing a bearing housing of a turbocharger is that the bearing housing of the turbocharger is formed with a cooling passage for circulating cooling liquid by casting using a collapsible core. The collapsible core includes the end part forming portions (a one end forming portion and an other end forming portion) corresponding to the end portions of the cooling passage and having a substantially elliptical cross-section, and a fixing portion holding the end part forming portions and being embedded in a mold and fixed to the mold.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: February 28, 2017
    Assignee: TAIHO KOGYO CO., LTD.
    Inventors: Satoru Kanbara, Keijiro Maki, Kenji Muraoka, Yasuhiro Otake, Takuya Suzuki
  • Publication number: 20150093239
    Abstract: There is provided a turbocharger bearing housing which is capable of reducing the weight thereof. A bearing housing of a turbocharger contains a shaft connecting a turbine and a compressor, and turnably supports the shaft. The bearing housing of the turbocharger is divided into a turbine-side housing disposed at a turbine side and a compressor-side housing disposed at a compressor side. The compressor-side housing is formed of an aluminum-based material.
    Type: Application
    Filed: March 18, 2013
    Publication date: April 2, 2015
    Inventors: Kenichiro Takama, Satoru Kanbara, Keijiro Maki, Ryuji Naruse
  • Publication number: 20150093238
    Abstract: There is provided a method for manufacturing a turbocharger bearing housing which can prevent a collapsible core from being damaged when molten metal is cast in the mold. The method for manufacturing a bearing housing of a turbocharger is that the bearing housing of the turbocharger is formed with a cooling passage for circulating cooling liquid by casting using a collapsible core. The collapsible core includes the end part forming portions (a one end forming portion and an other end forming portion) corresponding to the end portions of the cooling passage and having a substantially elliptical cross-section, and a fixing portion holding the end part forming portions and being embedded in a mold and fixed to the mold.
    Type: Application
    Filed: April 25, 2013
    Publication date: April 2, 2015
    Applicant: TAIHO KOGYO CO., LTD.
    Inventors: Satoru Kanbara, Keijiro Maki, Kenji Muraoka, Yasuhiro Otake, Takuya Suzuki
  • Publication number: 20150056064
    Abstract: There is provided a turbocharger bearing housing having no necessity to use a core and capable of achieving cost reduction. A bearing housing of a turbocharger contains a shaft connecting a turbine and a compressor and turnably supports the shaft. The bearing housing of the turbocharger is divided into a turbine-side housing disposed at a turbine side and a compressor-side housing disposed at a compressor side. The turbine-side housing and the compressor-side housing is subjected to machining to thereby form a cooling water passage for supplying cooling water and a lubricating oil passage for supplying lubricating oil.
    Type: Application
    Filed: March 18, 2013
    Publication date: February 26, 2015
    Inventors: Kenichiro Takama, Satoru Kanbara, Keijiro Maki, Ryuji Naruse
  • Publication number: 20150056065
    Abstract: There is provided a turbocharger which can reduce whirl vibration. The turbocharger includes a shaft connecting a turbine and a compressor, a bearing housing having a bearing portion turnably supporting the shaft, and a sliding bearing interposed between the shaft and the bearing portion. The bearing portion is formed of an aluminum-based material, the shaft is formed of a steel material, and the sliding bearing is formed of a copper-based material.
    Type: Application
    Filed: March 18, 2013
    Publication date: February 26, 2015
    Inventors: Kenichiro Takama, Satoru Kanbara, Keijiro Maki, Ryuji Naruse