Patents by Inventor Shinichi Nishizawa
Shinichi Nishizawa 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: 11940031Abstract: A coil spring includes a wire rod and an elastic coat provided on the wire rod. The coil spring includes a coil section including a plurality of coil portions. The wire rod includes a round cross-sectional portion, a cross-section varying portion, and a rectangular cross-sectional portion along the longitudinal direction of the wire rod. The cross section of the rectangular cross-sectional portion is substantially square and has a first plane and a second plane. The first plane and the second plane oppose each other in the coil section. The elastic coat is provided on at least one of the first plane and the second plane. The elastic coat is continuous from the round cross-sectional portion to the cross-sectional variation portion and the rectangular cross-sectional portion.Type: GrantFiled: March 24, 2022Date of Patent: March 26, 2024Assignee: NHK SPRING CO., LTD.Inventors: Shinichi Nishizawa, Daisuke Ibano, Tsuyoshi Matsuda, Norifumi Arisaka, Shun Muramatsu, Chihiro Ito, Takuto Suzuki, Masatake Kinoshita, Asuka Kawasaki
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Publication number: 20240066936Abstract: A coil spring includes a wire rod including a round section portion and a flat section portion. The round section portion includes a first cross section whose cross section is round. The flat section portion includes a second cross section that is flat. The second cross section has a width greater than or equal to the diameter of the first cross section and a thickness less than the width. A polar moment of inertia of area of the second cross section is smaller than that of the first cross section. A variable section portion is formed between the round section portion and the flat section portion. The variable section portion changes its cross section from circular to flat from the round section portion towards the flat section portion.Type: ApplicationFiled: October 25, 2023Publication date: February 29, 2024Applicant: NHK SPRING CO., LTD.Inventors: Shinichi NISHIZAWA, Takeshi FURUSE, Senri MORIYAMA, Yusuke TANAKA
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Publication number: 20230392662Abstract: According to one embodiment, a coil spring includes a wire rod with a first end and a second end. The wire rod includes a round section portion including a round first cross section perpendicular to a longitudinal direction of the wire rod, a quadrangle section portion including a quadrangle a second section perpendicular to the longitudinal direction, and a variable section portion formed between the round section portion and the quadrangle section portion of the wire rod. The cross section of the variable section portion varies from circular to quadrangle from the round section portion to the quadrangle section portion. The end turn part of the coil spring includes the quadrangle section portion. The width and thickness of the second cross-section are smaller than the diameter of the first cross-section. The area of the second cross section is smaller than the area of the square inscribed in the circle of diameter of the first cross section.Type: ApplicationFiled: June 1, 2022Publication date: December 7, 2023Applicant: NHK SPRING CO., LTD.Inventors: Shinichi NISHIZAWA, Takeshi FURUSE, Senri MORIYAMA
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Patent number: 11821485Abstract: According to one embodiment, a coil spring includes a wire rod with a first end and a second end. The wire rod includes a round section portion including a round first cross section perpendicular to a longitudinal direction of the wire rod, a quadrangle section portion including a quadrangle a second section perpendicular to the longitudinal direction, and a variable section portion formed between the round section portion and the quadrangle section portion of the wire rod. The cross section of the variable section portion varies from circular to quadrangle from the round section portion to the quadrangle section portion. The end turn part of the coil spring includes the quadrangle section portion. The width and thickness of the second cross-section are smaller than the diameter of the first cross-section. The area of the second cross section is smaller than the area of the square inscribed in the circle of diameter of the first cross section.Type: GrantFiled: June 1, 2022Date of Patent: November 21, 2023Assignee: NHK SPRING CO., LTD.Inventors: Shinichi Nishizawa, Takeshi Furuse, Senri Moriyama
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Publication number: 20230304556Abstract: A coil spring includes a wire rod and an elastic coat provided on the wire rod. The coil spring includes a coil section including a plurality of coil portions. The wire rod includes a round cross-sectional portion, a cross-section varying portion, and a rectangular cross-sectional portion along the longitudinal direction of the wire rod. The cross section of the rectangular cross-sectional portion is substantially square and has a first plane and a second plane. The first plane and the second plane oppose each other in the coil section. The elastic coat is provided on at least one of the first plane and the second plane. The elastic coat is continuous from the round cross-sectional portion to the cross-sectional variation portion and the rectangular cross-sectional portion.Type: ApplicationFiled: December 7, 2022Publication date: September 28, 2023Applicant: NHK SPRING CO., LTD.Inventors: Shinichi NISHIZAWA, Daisuke IBANO, Tsuyoshi MATSUDA, Norifumi ARISAKA, Shun MURAMATSU, Chihiro ITO, Takuto SUZUKI, Masatake KINOSHITA, Asuka KAWASAKI
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Publication number: 20230304558Abstract: A coil spring includes a wire rod and an elastic coat provided on the wire rod. The coil spring includes a coil section including a plurality of coil portions. The wire rod includes a round cross-sectional portion, a cross-section varying portion, and a rectangular cross-sectional portion along the longitudinal direction of the wire rod. The cross section of the rectangular cross-sectional portion is substantially square and has a first plane and a second plane. The first plane and the second plane oppose each other in the coil section. The elastic coat is provided on at least one of the first plane and the second plane. The elastic coat is continuous from the round cross-sectional portion to the cross-sectional variation portion and the rectangular cross-sectional portion.Type: ApplicationFiled: May 22, 2023Publication date: September 28, 2023Applicant: NHK SPRING CO., LTD.Inventors: Shinichi NISHIZAWA, Daisuke IBANO, Tsuyoshi MATSUDA, Norifumi ARISAKA, Shun MURAMATSU, Chihiro ITO, Takuto SUZUKI, Masatake KINOSHITA, Asuka KAWASAKI
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Publication number: 20230304557Abstract: A coil spring includes a wire rod and an elastic coat provided on the wire rod. The coil spring includes a coil section including a plurality of coil portions. The wire rod includes a round cross-sectional portion, a cross-section varying portion, and a rectangular cross-sectional portion along the longitudinal direction of the wire rod. The cross section of the rectangular cross-sectional portion is substantially square and has a first plane and a second plane. The first plane and the second plane oppose each other in the coil section. The elastic coat is provided on at least one of the first plane and the second plane. The elastic coat is continuous from the round cross-sectional portion to the cross-sectional variation portion and the rectangular cross-sectional portion.Type: ApplicationFiled: March 24, 2022Publication date: September 28, 2023Applicant: NHK SPRING CO., LTD.Inventors: Shinichi NISHIZAWA, Daisuke IBANO, Tsuyoshi MATSUDA, Norifumi ARISAKA, Shun MURAMATSU, Chihiro ITO, Takuto SUZUKI, Masatake KINOSHITA, Asuka KAWASAKI
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Publication number: 20220241959Abstract: A module robot 100 is configured by coupling a plurality of modules 101, the modules 101 each having a first link 1, a second link 2 movably linked to the first link 1 relatively, and a hydraulic cylinder 3 configured to move the first link 1 and the second link 2 relatively.Type: ApplicationFiled: June 29, 2020Publication date: August 4, 2022Applicants: KYB-YS CO., LTD., The Ritsumeikan TrustInventors: Shunichi SUGIMOTO, Sang-Ho HYON, Yasushi SAITOU, Sadayuki KAMIKURA, Nobuyuki KOBAYASHI, Shinichi NISHIZAWA, Setsuko UCHIDA
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Patent number: 11371575Abstract: According to an embodiment, a coil spring includes a wire rod having an end and the other end. The wire rod of the coil spring includes, with regard to a section of the wire rod, a round section portion of an effective spring part, a square section portion in which the section is substantially square, and a taper portion. The square section portion includes an end turn part. A length of each side of the section of the square section portion is less than or equal to a square root of ½ multiplied by a diameter of the wire rod of the round section portion. In the taper portion, from the round section portion to the square section portion, the section changes from a round shape to substantially a square shape, and a sectional area is decreased.Type: GrantFiled: December 7, 2020Date of Patent: June 28, 2022Assignee: NHK SPRING CO., LTD.Inventors: Shinichi Nishizawa, Senri Moriyama, Fang Dai, Takeshi Furuse
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Publication number: 20220178415Abstract: According to an embodiment, a coil spring includes a wire rod having an end and the other end. The wire rod of the coil spring includes, with regard to a section of the wire rod, a round section potion of an effective spring part, a square section portion in which the section is substantially square, and a taper portion. The square section portion includes an end turn part. A length of each side of the section of the square section portion is less than or equal to a square root of ½ multiplied by a diameter of the wire rod of the round section portion. In the taper portion, from the round section portion to the square section portion, the section changes from a round shape to substantially a square shape, and a sectional area is decreased.Type: ApplicationFiled: December 7, 2020Publication date: June 9, 2022Applicant: NHK SPRING CO., LTD.Inventors: Shinichi NISHIZAWA, Senri MORIYAMA, Fang DAI, Takeshi FURUSE
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Patent number: 11125295Abstract: According to an embodiment, a damping device includes a base member including a first base and a second base, a weight member, a pair of first base-side coil springs provided between the first base and the weight member, and a pair of second base-side coil springs provided between the second base and the weight member. Each of the first base-side coil springs includes a first effective turn portion, a first fixed pin portion supported in the first base, and a first movable pin portion supported in the weight member. Each of the second base-side coil springs includes a second effective turn portion, a second fixed pin portion supported in the second base, and a second movable pin portion supported in the weight member.Type: GrantFiled: August 30, 2019Date of Patent: September 21, 2021Assignee: NHK INTERNATIONAL CORPORATIONInventors: Shinichi Nishizawa, Vinay Ravi, Norifumi Momoi
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Publication number: 20210062885Abstract: According to an embodiment, a damping device includes a base member including a first base and a second base, a weight member, a pair of first base-side coil springs provided between the first base and the weight member, and a pair of second base-side coil springs provided between the second base and the weight member. Each of the first base-side coil springs includes a first effective turn portion, a first fixed pin portion supported in the first base, and a first movable pin portion supported in the weight member. Each of the second base-side coil springs includes a second effective turn portion, a second fixed pin portion supported in the second base, and a second movable pin portion supported in the weight member.Type: ApplicationFiled: August 30, 2019Publication date: March 4, 2021Applicant: NHK International CorporationInventors: Shinichi NISHIZAWA, Vinay RAVI, Norifumi MOMOI
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Patent number: 10443670Abstract: A damping device according to one embodiment includes a base member fixed to a vibration suppression target, a first coil spring, a second coil spring, and a weight member. The first coil spring includes a first fixed-side end turn portion supported on a first support portion of the base member, a first effective portion, and a first movable-side end turn portion. The second coil spring includes a second fixed-side end turn portion supported on a second support portion of the base member, a second effective portion, and a second movable-side end turn portion. Each of the first coil spring and the second coil spring is deflected in a longitudinal direction along the axis, and a transverse direction perpendicular to the axis. The weight member is arranged between the first coil spring and the second coil spring, and moves in the longitudinal direction and the transverse direction.Type: GrantFiled: March 5, 2018Date of Patent: October 15, 2019Assignee: NHK INTERNATIONAL CORPORATIONInventors: Shinichi Nishizawa, Norifumi Momoi, Liwen Lee, Jeff Butts, Fang Dai
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Publication number: 20190271370Abstract: A damping device according to one embodiment includes a base member fixed to a vibration suppression target, a first coil spring, a second coil spring, and a weight member. The first coil spring includes a first fixed-side end turn portion supported on a first support portion of the base member, a first effective portion, and a first movable-side end turn portion. The second coil spring includes a second fixed-side end turn portion supported on a second support portion of the base member, a second effective portion, and a second movable-side end turn portion. Each of the first coil spring and the second coil spring is deflected in a longitudinal direction along the axis, and a transverse direction perpendicular to the axis. The weight member is arranged between the first coil spring and the second coil spring, and moves in the longitudinal direction and the transverse direction.Type: ApplicationFiled: March 5, 2018Publication date: September 5, 2019Applicant: NHK INTERNATIONAL CORPORATIONInventors: Shinichi NISHIZAWA, Norifumi MOMOI, Liwen LEE, Jeff BUTTS, Fang DAI
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Patent number: 10229242Abstract: In a design method of torsion bars used for a trunk lid, free shapes of the torsion bars unhitched from the trunk lid are designed. A center line model of the initial free shape is geometrically and statically created on the basis of a design specification. The center line model of an open shape is created from the free shape model and is deformed into a center line model of a closed modified shape. The center line models of the analyzed closed shape and the target closed shape is compared with each other to obtain a difference torque and a difference vector occurring between corresponding nodes on the center lines. The center line model is so changed as to decrease the difference torque and the difference vector.Type: GrantFiled: March 30, 2016Date of Patent: March 12, 2019Assignee: NHK SPRING CO., LTD.Inventors: Yoshio Kobayashi, Shinichi Nishizawa, Nobuhisa Yasuda
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Patent number: 10155425Abstract: A coil spring for use in a link-motion-type suspension includes a lower end turn portion, an upper end turn portion, and an effective portion of a cylindrical shape between the lower end turn portion and the upper end turn portion. Further, the coil spring includes a bowing control portion including a taper portion formed in at least one end turn portion of the lower end turn portion and the upper end turn portion. The taper portion has a shape whose thickness is reduced from the middle of the end turn portion toward a distal end of a wire along its length, and bowing of the effective portion is suppressed by absorbing a change in the inclination of a spring seat by the taper portion.Type: GrantFiled: January 31, 2017Date of Patent: December 18, 2018Assignee: NHK SPRING CO., LTD.Inventor: Shinichi Nishizawa
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Patent number: 10144261Abstract: A coil spring according to one embodiment includes a lower end turn portion which is in contact with a lower spring seat, an upper end turn portion which is in contact with an upper spring seat, and an effective portion between the lower end turn portion and the upper end turn portion. The coil spring is cylindrical about an axis of the effective portion in its free shape which is not compressed. Further, with respect to a coordinate system in which a force line is assumed as a Z-axis, the coil spring is cylindrical with a constant pitch in a direction along the Z-axis in its compressed shape which is compressed to a specified height.Type: GrantFiled: January 31, 2017Date of Patent: December 4, 2018Assignee: NHK SPRING CO., LTD.Inventor: Shinichi Nishizawa
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Patent number: 10065471Abstract: A coil spring for a vehicle suspension according to one embodiment includes a lower end turn portion, an upper end turn portion, and a cylindrical effective portion between the lower end turn portion and the upper end turn portion. In at least one of the upper end turn portion and the lower end turn portion, a taper portion having a taper length and a taper thickness for controlling a force line of the coil spring is formed. The taper portion is formed such that the thickness is reduced in a tapered way from a thickness varying portion provided in the middle of the end turn portion toward a distal end of the wire along its length. The thickness varying portion is arranged at a position close to the force line.Type: GrantFiled: January 31, 2017Date of Patent: September 4, 2018Assignee: NHK SPRING CO., LTD.Inventor: Shinichi Nishizawa
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Publication number: 20180215224Abstract: A coil spring for use in a link-motion-type suspension includes a lower end turn portion, an upper end turn portion, and an effective portion of a cylindrical shape between the lower end turn portion and the upper end turn portion. Further, the coil spring includes a bowing control portion including a taper portion formed in at least one end turn portion of the lower end turn portion and the upper end turn portion. The taper portion has a shape whose thickness is reduced from the middle of the end turn portion toward a distal end of a wire along its length, and bowing of the effective portion is suppressed by absorbing a change in the inclination of a spring seat by the taper portion.Type: ApplicationFiled: January 31, 2017Publication date: August 2, 2018Applicant: NHK SPRING CO., LTD.Inventor: Shinichi NISHIZAWA
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Publication number: 20180215226Abstract: A coil spring according to one embodiment includes a lower end turn portion which is in contact with a lower spring seat, an upper end turn portion which is in contact with an upper spring seat, and an effective portion between the lower end turn portion and the upper end turn portion. The coil spring is cylindrical about an axis of the effective portion in its free shape which is not compressed. Further, with respect to a coordinate system in which a force line is assumed as a Z-axis, the coil spring is cylindrical with a constant pitch in a direction along the Z-axis in its compressed shape which is compressed to a specified height.Type: ApplicationFiled: January 31, 2017Publication date: August 2, 2018Applicant: NHK SPRING CO., LTD.Inventor: Shinichi NISHIZAWA