Patents by Inventor Ken Nakamuta
Ken Nakamuta 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: 11255330Abstract: A manufacturing method of an end plate of a pump that can remove a sag includes: punching a workpiece from a plate material, the workpiece being the end plate including a mounting seat including a fastener; forming a pressed trace surface by pressing an outer edge of an outer surface, when a surface, of both front and back surfaces of the punched workpiece, further from a sag formed on a cut end surface is the outer surface, and a surface, of both front and back surfaces of the punched workpiece, nearer to the sag is an inner surface. A section of the pressed trace surface disposed along an outer edge of the mounting seat is a fastening section. A section of the pressed trace surface other than the fastening section is a non-fastening section. A radial width of the fastening section is shorter than that of the non-fastening section.Type: GrantFiled: January 31, 2017Date of Patent: February 22, 2022Assignee: TAIHO KOGYO Co., Ltd.Inventors: Syuhei Nishida, Satoshi Ikeda, Kazuya Mizuno, Ken Nakamuta
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Patent number: 11149730Abstract: A vane pump includes a housing, a rotor rotatable about a rotation axis, and a vane that rotates together with the rotor and reciprocates in a radial direction with respect to the rotor, the vane dividing a pump chamber into a plurality of working chambers. At least one of opposite end surfaces of the vane in an axial direction is a sliding surface that slidably contacts an inner surface of the housing via an oil film, and an oil reservoir portion is provided in the sliding surface in a recessed manner.Type: GrantFiled: June 19, 2019Date of Patent: October 19, 2021Assignee: TAIHO KOGYO Co., Ltd.Inventors: Ken Nakamuta, Syuhei Nishida
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Patent number: 11035363Abstract: A vane pump including: a housing having a pump chamber; a rotor having a cylindrical peripheral wall portion accommodated in the pump chamber and having a pair of vane holding grooves facing each other in a diameter direction, and an oil chamber defined inside the peripheral wall portion to store lubricating oil; and a vane that is held in the pair of vane holding grooves and moves across the oil chamber in the diameter direction, is provided. At least one of an inner surface of the housing and an end face of the peripheral wall portion, which together with the inner surface defines a sliding interface, has an oil groove for the lubricating oil.Type: GrantFiled: February 27, 2017Date of Patent: June 15, 2021Assignee: TAIHO KOGYO Co., Ltd.Inventors: Satoshi Ikeda, Ken Nakamuta
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Publication number: 20210148364Abstract: A manufacturing method of an end plate of a pump that can remove a sag includes: punching a workpiece from a plate material, the workpiece being the end plate including a mounting seat including a fastener; forming a pressed trace surface by pressing an outer edge of an outer surface, when a surface, of both front and back surfaces of the punched workpiece, further from a sag formed on a cut end surface is the outer surface, and a surface, of both front and back surfaces of the punched workpiece, nearer to the sag is an inner surface. A section of the pressed trace surface disposed along an outer edge of the mounting seat is a fastening section. A section of the pressed trace surface other than the fastening section is a non-fastening section. A radial width of the fastening section is shorter than that of the non-fastening section.Type: ApplicationFiled: January 31, 2017Publication date: May 20, 2021Applicant: TAIHO KOGYO Co., Ltd.Inventors: Syuhei NISHIDA, Satoshi IKEDA, Kazuya MIZUNO, Ken NAKAMUTA
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Publication number: 20200018308Abstract: A vane pump includes a housing, a rotor rotatable about a rotation axis, and a vane that rotates together with the rotor and reciprocates in a radial direction with respect to the rotor, the vane dividing a pump chamber into a plurality of working chambers. At least one of opposite end surfaces of the vane in an axial direction is a sliding surface that slidably contacts an inner surface of the housing via an oil film, and an oil reservoir portion is provided in the sliding surface in a recessed manner.Type: ApplicationFiled: June 19, 2019Publication date: January 16, 2020Applicant: TAIHO KOGYO CO., Ltd.Inventors: Ken NAKAMUTA, Syuhei Nishida
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Publication number: 20190101117Abstract: A vane pump including: a housing having a pump chamber; a rotor having a cylindrical peripheral wall portion accommodated in the pump chamber and having a pair of vane holding grooves facing each other in a diameter direction, and an oil chamber defined inside the peripheral wall portion to store lubricating oil; and a vane that is held in the pair of vane holding grooves and moves across the oil chamber in the diameter direction, is provided. At least one of an inner surface of the housing and an end face of the peripheral wall portion, which together with the inner surface defines a sliding interface, has an oil groove for the lubricating oil.Type: ApplicationFiled: February 27, 2017Publication date: April 4, 2019Applicant: TAIHO KOGYO Co., Ltd.Inventors: Satoshi IKEDA, Ken NAKAMUTA
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Patent number: D832888Type: GrantFiled: March 30, 2017Date of Patent: November 6, 2018Assignee: TAIHO KOGYO CO., LTD.Inventors: Shuhei Nishida, Satoshi Ikeda, Kazuya Mizuno, Ken Nakamuta
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Patent number: D833484Type: GrantFiled: March 30, 2017Date of Patent: November 13, 2018Assignee: TAIHO KOGYO CO., LTD.Inventors: Shuhei Nishida, Satoshi Ikeda, Kazuya Mizuno, Ken Nakamuta
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Patent number: D875141Type: GrantFiled: March 30, 2017Date of Patent: February 11, 2020Assignee: TAIHO KOGYO CO., LTD.Inventors: Syuhei Nishida, Satoshi Ikeda, Kazuya Mizuno, Ken Nakamuta
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Patent number: D967197Type: GrantFiled: July 23, 2019Date of Patent: October 18, 2022Assignee: TAIHO KOGYO CO., LTD.Inventors: Syuhei Nishida, Satoshi Ikeda, Kazuya Mizuno, Ken Nakamuta
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Patent number: D969171Type: GrantFiled: July 23, 2019Date of Patent: November 8, 2022Assignee: TAIHO KOGYO CO., LTD.Inventors: Syuhei Nishida, Satoshi Ikeda, Kazuya Mizuno, Ken Nakamuta