Patents by Inventor Naoyasu Nakao
Naoyasu Nakao 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: 11014319Abstract: To solve problems of complication and malfunction of the device's structure, an increase in the process time, and malfunction caused by catching of a front end portion of a bead apex rubber. A bead apex rubber forming method comprises a forming step P1, a connecting space opening step P2, a connecting space closing step P3, and a connecting step P4. In a rear closed state R of a molding chamber 11, the forming step P1 injects unvulcanized rubber G while a bead core A is being rotated, and forms a bead apex rubber B having a front end portion Bf. when the front end portion Bf approaches a rear shutter part 9, the connecting space opening step P2 removes a second lateral surface S2 together with the rear shutter part 9, and forms, between the front end portion Bf and a rear end portion Br, a connecting space J whose second side surface S2 side is opened.Type: GrantFiled: October 13, 2017Date of Patent: May 25, 2021Assignee: NAKATA ENGINEERING CO., LTD.Inventor: Naoyasu Nakao
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Patent number: 10864694Abstract: The present invention forms bead apex rubber with good precision on the outer circumferential surface of the bead core. A molding process, in which unvulcanized rubber is made to flow into a bead apex molding chamber that is surrounded by surfaces that include the outer circumferential surface of a circular bead core and the bead apex rubber is formed directly on the outer circumferential surface of the bead core that is rotating around the core axis, is provided. The molding process comprises: a tip forming step that forms the leading end of the bead apex rubber; a middle section forming step that sequentially forms the bead apex rubber to be continuous with the leading end; and a joining step to join the back end and the leading end of the bead apex rubber by inflowing the unvulcanized rubber therebetween.Type: GrantFiled: February 14, 2018Date of Patent: December 15, 2020Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., NAKATA ENGINEERING CO., LTD.Inventors: Hiroyuki Onimatsu, Naoyasu Nakao, Hiroyuki Takahashi
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Patent number: 10738776Abstract: In a gear pump device for rubber extrusion, prolongation of the maintenance intervals is intended by preventing rubber scorch occurring at the gear support-shaft portion. It has a bushing ring 5 inserted in a gear-housing bore 3 of a housing 4. The bushing ring 5 rotatably supports a support-shaft portion 7 of a gear 2 accommodated in the gear-housing bore 3. The bushing ring 5 has a bearing 15 and a sealing means 16 built-in. The sealing means 16 includes a seal ring 22 of which cross section is ]-shaped and which has a first lip portion 22i contacting with the outer peripheral surface of the support-shaft portion 7, a second lip portion 22o disposed outside thereof in the radial direction, and a side wall portion 22m connecting between outer ends in the axial direction, of the first and second lip portions 22i, 22o.Type: GrantFiled: October 3, 2016Date of Patent: August 11, 2020Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., NAKATA ENGINEERING CO., LTD.Inventors: Hiroyuki Onimatsu, Nozomu Nishioka, Hiroshi Ihara, Noboru Ishihara, Naoyasu Nakao
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Publication number: 20190248086Abstract: To solve problems of complication and malfunction of the device's structure, an increase in the process time, and malfunction caused by catching of a front end portion of a bead apex rubber. A bead apex rubber forming method comprises a forming step P1, a connecting space opening step P2, a connecting space closing step P3, and a connecting step P4. In a rear closed state R of a molding chamber 11, the forming step P1 injects unvulcanized rubber G while a bead core A is being rotated, and forms a bead apex rubber B having a front end portion Bf. when the front end portion Bf approaches a rear shutter part 9, the connecting space opening step P2 removes a second lateral surface S2 together with the rear shutter part 9, and forms, between the front end portion Bf and a rear end portion Br, a connecting space J whose second side surface S2 side is opened.Type: ApplicationFiled: October 13, 2017Publication date: August 15, 2019Applicant: NAKATA ENGINEERING CO., LTD.Inventor: Naoyasu NAKAO
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Publication number: 20180320686Abstract: In a gear pump device for rubber extrusion, prolongation of the maintenance intervals is intended by preventing rubber scorch occurring at the gear support-shaft portion. It has a bushing ring 5 inserted in a gear-housing bore 3 of a housing 4. The bushing ring 5 rotatably supports a support-shaft portion 7 of a gear 2 accommodated in the gear-housing bore 3. The bushing ring 5 has a bearing 15 and a sealing means 16 built-in. The sealing means 16 includes a seal ring 22 of which cross section is ]-shaped and which has a first lip portion 22i contacting with the outer peripheral surface of the support-shaft portion 7, a second lip portion 22o disposed outside thereof in the radial direction, and a side wall portion 22m connecting between outer ends in the axial direction, of the first and second lip portions 22i, 22o.Type: ApplicationFiled: October 3, 2016Publication date: November 8, 2018Applicants: SUMITOMO RUBBER INDUSTRIES, LTD., NAKATA ENGINEERING CO., LTD.Inventors: Hiroyuki ONIMATSU, Nozomu NISHIOKA, Hiroshi IHARA, Noboru ISHIHARA, Naoyasu NAKAO
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Publication number: 20180311920Abstract: The present invention forms bead apex rubber with good precision on the outer circumferential surface of the bead core. A molding process, in which unvulcanized rubber is made to flow into a bead apex molding chamber that is surrounded by surfaces that include the outer circumferential surface of a circular bead core and the bead apex rubber is formed directly on the outer circumferential surface of the bead core that is rotating around the core axis, is provided. The molding process comprises: a tip forming step that forms the leading end of the bead apex rubber; a middle section forming step that sequentially forms the bead apex rubber to be continuous with the leading end; and a joining step to join the back end and the leading end of the bead apex rubber by inflowing the unvulcanized rubber therebetween.Type: ApplicationFiled: February 14, 2018Publication date: November 1, 2018Applicants: SUMITOMO RUBBER INDUSTRIES, LTD., NAKATA ENGINEERING CO., LTD.Inventors: Hiroyuki ONIMATSU, Naoyasu NAKAO, Hiroyuki TAKAHASHI
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Patent number: 9944035Abstract: The present invention forms bead apex rubber with good precision on the outer circumferential surface of the bead core. A molding process, in which unvulcanized rubber is made to flow into a bead apex molding chamber that is surrounded by surfaces that include the outer circumferential surface of a circular bead core and the bead apex rubber is formed directly on the outer circumferential surface of the bead core that is rotating around the core axis, is provided. The molding process comprises: a tip forming step that forms the leading end of the bead apex rubber; a middle section forming step that sequentially forms the bead apex rubber to be continuous with the leading end; and a joining step to join the back end and the leading end of the bead apex rubber by inflowing the unvulcanized rubber therebetween.Type: GrantFiled: April 8, 2013Date of Patent: April 17, 2018Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., NAKATA ENGINEERING CO. LTD.Inventors: Hiroyuki Onimatsu, Naoyasu Nakao, Hiroyuki Takahashi
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Publication number: 20150068668Abstract: The present invention forms bead apex rubber with good precision on the outer circumferential surface of the bead core. A molding process, in which unvulcanized rubber is made to flow into a bead apex molding chamber that is surrounded by surfaces that include the outer circumferential surface of a circular bead core and the bead apex rubber is formed directly on the outer circumferential surface of the bead core that is rotating around the core axis, is provided. The molding process comprises: a tip forming step that forms the leading end of the bead apex rubber; a middle section forming step that sequentially forms the bead apex rubber to be continuous with the leading end; and a joining step to join the back end and the leading end of the bead apex rubber by inflowing the unvulcanized rubber therebetween.Type: ApplicationFiled: April 8, 2013Publication date: March 12, 2015Applicants: NAKATA ENGINEERING CO., LTD., SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hiroyuki Onimatsu, Naoyasu Nakao, Hiroyuki Takahashi