Patents by Inventor Eiji Matsubara
Eiji Matsubara 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: 11938559Abstract: A stir pin includes a base end portion configured to be held rotatably about a first axis, a stirring portion provided to project from a shoulder member to be rotatable about the first axis together with the base end portion, and an intermediate portion including a second portion connected to the stirring portion to be rotatable about the first axis together with the stirring portion and having a second diameter passing through the first axis, and a first portion provided between and connected to the base end portion and the second portion to be rotatable about the first axis together with the base end portion and the second portion. The first portion has an end surface to which the second portion is connected and which has a maximum diameter larger than the second diameter. The end surface has a ring-shaped receiving surface configured to receive a material waste.Type: GrantFiled: March 31, 2022Date of Patent: March 26, 2024Assignee: YAMAZAKI MAZAK CORPORATIONInventors: Seigo Ouchi, Eiji Matsubara, Masayasu Minatani, Toru Murakami
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Publication number: 20220226928Abstract: A stir pin includes a base end portion configured to be held rotatably about a first axis, a stirring portion provided to project from a shoulder member to be rotatable about the first axis together with the base end portion, and an intermediate portion including a second portion connected to the stirring portion to be rotatable about the first axis together with the stirring portion and having a second diameter passing through the first axis, and a first portion provided between and connected to the base end portion and the second portion to be rotatable about the first axis together with the base end portion and the second portion. The first portion has an end surface to which the second portion is connected and which has a maximum diameter larger than the second diameter. The end surface has a ring-shaped receiving surface configured to receive a material waste.Type: ApplicationFiled: March 31, 2022Publication date: July 21, 2022Applicant: Yamazaki Mazak CorporationInventors: Seigo OUCHI, Eiji MATSUBARA, Masayasu MINATANI, Toru MURAKAMI
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Patent number: 11130193Abstract: A friction stir welding tool includes a housing and a stir pin. The housing includes a first surface, a housing hole formed in the housing and having a housing hole opening on the first surface, and a discharge hole through which the housing hole is in communication with an outside of the housing. The stir pin includes a pin holder and a pin body. The pin holder has a first end portion and a second end portion. The first end portion is configured to be connected to a rotation spindle. The pin body is provided in the housing hole, is detachably attached to the second end portion, and is rotatable together with the pin holder around the rotation axis. The pin body includes a stir portion that protrudes from the first surface via the housing hole opening.Type: GrantFiled: July 14, 2020Date of Patent: September 28, 2021Assignee: YAMAZAKI MAZAK CORPORATIONInventors: Masayasu Hachiya, Eiji Matsubara, Toru Murakami, Seigo Ouchi
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Patent number: 11130178Abstract: A machining tool includes a light irradiator, a cover, and a light blocking filter. The light irradiator is to irradiate a workpiece to process the workpiece. The cover covers the light irradiator and the workpiece in the cover. The light blocking filter is configured to change light transmissivity of the light blocking filter in accordance with light from an inside of the cover, which the light blocking filter receives.Type: GrantFiled: July 20, 2018Date of Patent: September 28, 2021Assignee: YAMAZAKI MAZAK CORPORATIONInventors: Kazuki Uemura, Naokazu Okabe, Eiji Matsubara, Shoya Kai
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Publication number: 20200338664Abstract: A friction stir welding tool includes a housing and a stir pin. The housing includes a first surface, a housing hole formed in the housing and having a housing hole opening on the first surface, and a discharge hole through which the housing hole is in communication with an outside of the housing. The stir pin includes a pin holder and a pin body. The pin holder has a first end portion and a second end portion. The first end portion is configured to be connected to a rotation spindle. The pin body is provided in the housing hole, is detachably attached to the second end portion, and is rotatable together with the pin holder around the rotation axis. The pin body includes a stir portion that protrudes from the first surface via the housing hole opening.Type: ApplicationFiled: July 14, 2020Publication date: October 29, 2020Applicant: Yamazaki Mazak CorporationInventors: Masayasu HACHIYA, Eiji MATSUBARA, Toru MURAKAMI, Seigo OUCHI
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Patent number: 10697610Abstract: A resin molded product produced by injection molding includes: a gate mark formed on a non-design surface; and a step provided so as to intersect with a flow of a resin injected from a gate. When a flow distance of the resin from the gate mark to an end portion of the resin molded product is L [mm], and a thickness of the resin molded product is t [mm], the resin molded product is configured to have L/t of 185 or more, and a tangential angle of the step is 5° to 30°.Type: GrantFiled: January 30, 2019Date of Patent: June 30, 2020Assignee: KOITO MANUFACTURING CO., LTD.Inventors: Kenta Sugiyama, Masashi Katayama, Eiji Matsubara
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Patent number: 10520155Abstract: A light guide for a vehicle lamp includes a rod-shaped portion and a plate-shaped portion. The rod-shaped portion includes a rod-shaped light guide portion and a connecting projection portion projecting from a peripheral surface of the rod-shaped light guide portion and extending along the rod-shaped light guide portion. The plate-shaped portion includes two principal surfaces facing opposite to each other and a plate-shaped portion side surface connecting the two principal surfaces. The light guide is a multi-color molded product in which the rod-shaped portion is formed of a first resin material and the plate-shaped portion is formed of a second resin material containing a light diffusing agent. The rod-shaped light guide portion is connected to the side surface of the plate-shaped portion by the connecting projection portion.Type: GrantFiled: August 3, 2018Date of Patent: December 31, 2019Assignee: KOITO MANUFACTURING CO., LTD.Inventors: Eiji Matsubara, Mamoru Kosuge, Akinori Yamamoto, Asami Sakashita
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Publication number: 20190249844Abstract: A resin molded product produced by injection molding includes: a gate mark formed on a non-design surface; and a step provided so as to intersect with a flow of a resin injected from a gate. When a flow distance of the resin from the gate mark to an end portion of the resin molded product is L [mm], and a thickness of the resin molded product is t [mm], the resin molded product is configured to have L/t of 185 or more, and a tangential angle of the step is 5° to 30°.Type: ApplicationFiled: January 30, 2019Publication date: August 15, 2019Inventors: Kenta Sugiyama, Masashi Katayama, Eiji Matsubara
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Publication number: 20190049086Abstract: A light guide for a vehicle lamp includes a rod-shaped portion and a plate-shaped portion. The rod-shaped portion includes a rod-shaped light guide portion and a connecting projection portion projecting from a peripheral surface of the rod-shaped light guide portion and extending along the rod-shaped light guide portion. The plate-shaped portion includes two principal surfaces facing opposite to each other and a plate-shaped portion side surface connecting the two principal surfaces. The light guide is a multi-color molded product in which the rod-shaped portion is formed of a first resin material and the plate-shaped portion is formed of a second resin material containing a light diffusing agent. The rod-shaped light guide portion is connected to the side surface of the plate-shaped portion by the connecting projection portion.Type: ApplicationFiled: August 3, 2018Publication date: February 14, 2019Applicant: KOITO MANUFACTURING CO., LTD.Inventors: Eiji MATSUBARA, Mamoru KOSUGE, Akinori YAMAMOTO, Asami SAKASHITA
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Publication number: 20180326494Abstract: A machining tool includes a light irradiator, a cover, and a light blocking filter. The light irradiator is to irradiate a workpiece to process the workpiece. The cover covers the light irradiator and the workpiece in the cover. The light blocking filter is configured to change light transmissivity of the light blocking filter in accordance with light from an inside of the cover, which the light blocking filter receives.Type: ApplicationFiled: July 20, 2018Publication date: November 15, 2018Applicant: Yamazaki Mazak CorporationInventors: Kazuki UEMURA, Naokazu OKABE, Eiji MATSUBARA, Shoya KAI
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Patent number: 5300410Abstract: Disclosed is a developer for silver halide photographic light-sensitive material which contains at least one of the compounds represented by the following formulas [I], [II] and [III]:Formula [I]: ##STR1## wherein M represents a hydrogen atom, an alkali metal or NH.sub.4 and A and B each represents a mercapto group, a hydroxyl group, a hydroxyalkyl group, or ##STR2## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom or --X--Y group in which X represents a divalent group and Y represents a carboxyl group or a hydroxyl group,Formula [II]: ##STR3## wherein M represents a hydrogen atom, an alkali metal or NH.sub.4, A' represents an organic divalent group, and B' represents --SO.sub.3 M', --COOM', --SO.sub.2 NHR.sub.3, --CONHR.sub.3, or --OH wherein M' represents a hydrogen atom, an alkali metal atom or NH.sub.4, and R.sub.Type: GrantFiled: February 22, 1993Date of Patent: April 5, 1994Assignee: Mitsubishi Paper Mills LimitedInventors: Sukeaki Date, Eiichi Terashima, Toshiro Kondo, Eiji Matsubara, Masao Okushima, Seiichi Sumi
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Patent number: 5258258Abstract: Disclosed is a processing solution used for making lithographic printing plates by silver complex diffusion transfer process which contains at least one thioether derivative represented by the following formulas (I), (II) and (III): ##STR1## wherein n.sub.1 and n.sub.2 each represents 0, 1 or 2 and R.sub.1 and R.sub.2 each represents an alkylene group of 1-5 carbon atoms, ##STR2## wherein R.sub.1 represents an alkylene group of 1-5 carbon atoms, X represents a hydrogen atom, a carboxy group, an alkoxycarbonyl group, a carbamoyl group, a hydroxy group, or --OR.sup.2 in which R.sup.2 has the same meaning as --R.sub.1 --S).sub.n CH.sub.2 CH.sub.2 OH above, and n represents 0, 1 or 2, ##STR3## wherein X' represents an aromatic or heterocyclic group which has a carboxy group, R.sub.1 and R.sub.2 each represents an alkylene group of 1-5 carbon atoms and n represents 0, 1, 2 or 3.Type: GrantFiled: October 10, 1991Date of Patent: November 2, 1993Assignee: Mitsubishi Paper Mills LimitedInventors: Eiji Matsubara, Hidetoshi Miura, Takimi Hashimoto