Patents by Inventor Yoshifumi Saka
Yoshifumi Saka 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: 9692162Abstract: An electric contact includes a bulge-shaped contact having a bulge shape, and a plate-shaped contact that has a plate shape and comes into electrical contact with an apex portion of the bulge-shaped contact. The bulge-shaped contact has a silver-tin alloy layer and a silver coating layer that coats the surface of the silver-tin alloy layer and is exposed at an outermost surface. The plate-shaped contact has a silver layer that does not have a silver-tin alloy layer directly below and is exposed at the outermost surface. Also, a connector terminal pair has such an electric contact in a contacting portion.Type: GrantFiled: November 19, 2014Date of Patent: June 27, 2017Assignees: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takahiro Sunaga, Yoshifumi Saka, Yasushi Saitoh, Akihiro Kato
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Patent number: 9673547Abstract: The present invention aims to provide a plated terminal for connector which requires a smaller insertion force by reducing a friction coefficient and a terminal pair formed using such a plated terminal for connector. An alloy containing layer (1) made of tin and palladium and containing a tin-palladium alloy is formed on a surface of a terminal base material (2) made of copper or copper alloy. Here, the alloy containing layer (1) is preferably such that domain structures of a first metal phase (11) made of an alloy of tin and palladium are formed in a second metal phase (12) made of pure tin or an alloy having a higher ratio of tin to palladium than in the first metal phase (11).Type: GrantFiled: May 9, 2013Date of Patent: June 6, 2017Assignees: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Yoshifumi Saka, Hajime Watanabe, Mikio Satou, Masayuki Ookubo
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Patent number: 9590341Abstract: It is aimed to provide a connector terminal including a silver layer on a surface of an electrical contact portion, having a reduced coefficient of friction of a surface and excellent in practicality and productivity and provide a method for producing such a connector terminal. A coating layer made of a silver layer and a film formed by bringing the silver layer into contact with a solution containing thiol and benzotriazole is formed on a contact portion of a connector terminal to be electrically brought into contact with another electrically conductive member. A solvent of this solution is preferably water and the thiol is preferably octadecanethiol.Type: GrantFiled: July 16, 2013Date of Patent: March 7, 2017Assignees: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takahiro Sunaga, Yoshifumi Saka
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Publication number: 20170033486Abstract: A terminal pair including a first terminal provided with a first contact portion and a second terminal provided with a second contact portion. The first contact portion includes a composite covering layer having a Sn—Pd based alloy phase and a Sn phase, and has a surface including the Sn—Pd based alloy phase and the Sn phase. The second contact portion includes a Cu—Sn alloy layer and a Sn layer covering part of the Cu—Sn alloy layer, and has a surface including a Cu—Sn alloy region corresponding to an exposed portion of the Cu—Sn alloy layer and a Sn region corresponding to an exposed portion of the Sn layer. A coefficient of friction for sliding movement between the first contact portion and the second contact portion is lower than a coefficient of friction for sliding movement between the two first contact portions and between the two second contact portions.Type: ApplicationFiled: March 25, 2015Publication date: February 2, 2017Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Yoshifumi SAKA, Masayuki OOKUBO, Hajime WATANABE
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Publication number: 20160276768Abstract: An electric contact includes a bulge-shaped contact having a bulge shape, and a plate-shaped contact that has a plate shape and comes into electrical contact with an apex portion of the bulge-shaped contact. The bulge-shaped contact has a silver-tin alloy layer and a silver coating layer that coats the surface of the silver-tin alloy layer and is exposed at an outermost surface. The plate-shaped contact has a silver layer that does not have a silver-tin alloy layer directly below and is exposed at the outermost surface. Also, a connector terminal pair has such an electric contact in a contacting portion.Type: ApplicationFiled: November 19, 2014Publication date: September 22, 2016Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takahiro SUNAGA, Yoshifumi SAKA, Yasushi SAITOH, Akihiro KATO
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Publication number: 20160240950Abstract: A board terminal 1 includes a base material 11 made of a metal material and a plating film 12 covering a surface of the base material 11. The plating film 12 includes an outermost layer 120 having a Sn mother phase 120a and Sn—Pd-based alloy phases 120b dispersed in the Sn mother phase 120a, the Sn mother phase 120a and the Sn—Pd-based alloy phases 120b being present on an outer surface. A Pd content in the outermost layer 120 is not more than 7 atomic %. A board connector 2 includes the board terminal 1 and a housing 20 for holding the board terminal 1.Type: ApplicationFiled: October 22, 2014Publication date: August 18, 2016Inventors: Hajime Watanabe, Yasushi Saitoh, Yoshifumi Saka
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Publication number: 20150357737Abstract: It is aimed to provide a connector terminal including a silver layer on a surface of an electrical contact portion, having a reduced coefficient of friction of a surface and excellent in practicality and productivity and provide a method for producing such a connector terminal. A coating layer made of a silver layer and a film formed by bringing the silver layer into contact with a solution containing thiol and benzotriazole is formed on a contact portion of a connector terminal to be electrically brought into contact with another electrically conductive member. A solvent of this solution is preferably water and the thiol is preferably octadecanethiol.Type: ApplicationFiled: July 16, 2013Publication date: December 10, 2015Inventors: Takahiro SUNAGA, Yoshifumi SAKA
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Publication number: 20150280339Abstract: It is aimed to provide a connector terminal including a tin layer on an outermost surface and a material therefor which achieves a low insertion force without depending on the detail of the microstructure of the outermost surface and excessively increasing a contact resistance. A composite coating layer including areas where tin is exposed and areas where a copper-tin alloy is exposed on an outermost surface is formed on a surface of a base material in an area including a contact portion to be brought into contact with another electrically conductive member and the glossiness of the surface of the composite coating layer is in a range of 50 to 1000%.Type: ApplicationFiled: July 22, 2013Publication date: October 1, 2015Inventors: Yoshifumi Saka, Masayuki Okubo, Hajime Watanabe
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Publication number: 20150236439Abstract: It is aimed to provide a plated terminal for connector and a terminal pair having a tin layer on an outermost surface and achieving both a reduction of a terminal insertion force and a reduction of a contact resistance. The plated terminal for connector includes a coating layer containing tin and a hard metal harder than tin at a contact portion to be brought into contact with another electrical conductive member, and both an area where tin is exposed on an outermost surface and an area where the hard metal is exposed on the outermost surface or an area where the hard metal is coated with a tin layer thinner than in other parts are included in the contact portion. Such a material can be obtained, for example, by forming a tin layer on a surface of a base material having an uneven structure on a surface of which a hard metal layer is formed.Type: ApplicationFiled: August 19, 2013Publication date: August 20, 2015Inventors: Masayuki Okubo, Yasushi Saitoh, Yoshifumi Saka
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Publication number: 20150133005Abstract: The present invention aims to provide a plated terminal for connector which requires a smaller insertion force by reducing a friction coefficient and a terminal pair formed using such a plated terminal for connector. An alloy containing layer (1) made of tin and palladium and containing a tin-palladium alloy is formed on a surface of a terminal base material (2) made of copper or copper alloy. Here, the alloy containing layer (1) is preferably such that domain structures of a first metal phase (11) made of an alloy of tin and palladium are formed in a second metal phase (12) made of pure tin or an alloy having a higher ratio of tin to palladium than in the first metal phase (11).Type: ApplicationFiled: May 9, 2013Publication date: May 14, 2015Inventors: Yoshifumi Saka, Hajime Watanabe, Mikio Satou, Masayuki Ookubo
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Publication number: 20150079422Abstract: It is aimed to provide a plated member and a plated terminal for connector, to which a large current can be applied and which have both a low friction coefficient and high heat resistance, at low cost and provide a method for producing such a plated member and a method for producing such a plated terminal for connector. A silver-tin alloy layer for coating a surface of a base material made of copper or copper alloy and a silver coating layer for coating the silver-tin alloy layer and to be exposed on an outermost surface are simultaneously formed by heating to obtain a plated member after tin and silver plating layers are alternately laminated on the surface of the base material with the outermost surface formed by the silver plating layer.Type: ApplicationFiled: December 20, 2012Publication date: March 19, 2015Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Takahiro Sunaga, Yoshifumi Saka, Yasushi Saitou
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Patent number: 6793543Abstract: A bus bar structure includes: a bus bar stored in an electric junction box; and a tab terminal electrically connected to a pattern portion of the bus bar. The tab terminal is separately formed with the bus bar. The pattern portion is welded with the tab terminal by using a laser beam.Type: GrantFiled: May 21, 2001Date of Patent: September 21, 2004Assignees: Autonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.Inventors: Takahiro Onizuka, Atsuhiko Fujii, Yoshifumi Saka, Atsuhiro Togawa
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Patent number: 6761598Abstract: A bus bar structure includes: a bus bar stored in an electric junction box; and a tab terminal electrically connected to a pattern portion of the bus bar. The tab terminal is separately formed with the bus bar. The pattern portion is welded with the tab terminal by using a laser beam.Type: GrantFiled: November 18, 2002Date of Patent: July 13, 2004Assignees: Autonetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.Inventors: Takahiro Onizuka, Atsuhiko Fujii, Yoshifumi Saka, Atsuhiro Togawa
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Publication number: 20030096541Abstract: A bus bar structure includes: a bus bar stored in an electric junction box; and a tab terminal electrically connected to a pattern portion of the bus bar. The tab terminal is separately formed with the bus bar. The pattern portion is welded with the tab terminal by using a laser beam.Type: ApplicationFiled: November 18, 2002Publication date: May 22, 2003Applicant: Autonetworks Technologies, LTDInventors: Takahiro Onizuka, Atsuhiko Fujii, Yoshifumi Saka, Atsuhiro Togawa
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Publication number: 20010021611Abstract: A bus bar structure includes: a bus bar stored in an electric junction box; and a tab terminal electrically connected to a pattern portion of the bus bar. The tab terminal is separately formed with the bus bar. The pattern portion is welded with the tab terminal by using a laser beam.Type: ApplicationFiled: May 21, 2001Publication date: September 13, 2001Applicant: Harness System Technologies Research, Ltd.Inventors: Takahiro Onizuka, Atsuhiko Fujii, Yoshifumi Saka, Atsuhiro Togawa
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Patent number: 6264510Abstract: A bus bar structure includes: a bus bar stored in an electric junction box; and a tab terminal electrically connected to a pattern portion of the bus bar. The tab terminal is separately formed with the bus bar. The pattern portion is welded with the tab terminal by using a laser beam.Type: GrantFiled: May 27, 1998Date of Patent: July 24, 2001Assignees: Harness System Technologies Research Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.Inventors: Takahiro Onizuka, Atsuhiko Fujii, Yoshifumi Saka, Atsuhiro Togawa