Patents by Inventor Yoshinori Itani
Yoshinori Itani 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: 10520119Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: GrantFiled: December 18, 2015Date of Patent: December 31, 2019Assignee: Kubota CorporationInventors: Shozo Kishi, Takashi Yokomizo, Yoshinori Itani, Takaaki Kagawa, Kohei Ikeda, Shogo Kaneko
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Patent number: 10006572Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: GrantFiled: December 18, 2015Date of Patent: June 26, 2018Assignee: Kubota CorporationInventors: Shozo Kishi, Takashi Yokomizo, Yoshinori Itani, Takaaki Kagawa, Kohei Ikeda
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Patent number: 9719618Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: GrantFiled: March 20, 2014Date of Patent: August 1, 2017Assignee: Kubota CorporationInventors: Shozo Kishi, Takashi Yokomizo, Yoshinori Itani, Takaaki Kagawa, Kohei Ikeda, Shogo Kaneko
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Patent number: 9488300Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: GrantFiled: September 10, 2013Date of Patent: November 8, 2016Assignee: Kubota CorporationInventors: Shozo Kishi, Takashi Yokomizo, Yoshinori Itani, Takaaki Kagawa, Kohei Ikeda, Shogo Kaneko
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Publication number: 20160102790Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: ApplicationFiled: December 18, 2015Publication date: April 14, 2016Applicant: Kubota CorporationInventors: Shozo Kishi, Takashi Yokomizo, Yoshinori Itani, Takaaki Kagawa, Kohei Ikeda, Shogo Kaneko
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Publication number: 20160102792Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: ApplicationFiled: December 18, 2015Publication date: April 14, 2016Applicant: Kubota CorporationInventors: Shozo Kishi, Takashi Yokomizo, Yoshinori Itani, Takaaki Kagawa, Kohei Ikeda, Shogo Kaneko
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Patent number: 9228060Abstract: An object of the present invention is to provide a method for industrially advantageously manufacturing a sulfonated aromatic polymer while preventing a reduction in the molecular weight of the resulting sulfonated aromatic polymer. The present invention relates to a method for manufacturing a sulfonated aromatic polymer, comprising sulfonating an aromatic polymer and a sulfonating agent in the presence of a solvent of a compound containing a sulfonyl group (—SO2—).Type: GrantFiled: December 18, 2012Date of Patent: January 5, 2016Assignee: KONISHI CHEMICAL IND. CO., LTD.Inventors: Tomonori Mitsuru, Yoshinori Itani, Wakako Sakata
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Publication number: 20140350197Abstract: An object of the present invention is to provide a method for industrially advantageously manufacturing a sulfonated aromatic polymer while preventing a reduction in the molecular weight of the resulting sulfonated aromatic polymer. The present invention relates to a method for manufacturing a sulfonated aromatic polymer, comprising sulfonating an aromatic polymer and a sulfonating agent in the presence of a solvent of a compound containing a sulfonyl group (—SO2—).Type: ApplicationFiled: December 18, 2012Publication date: November 27, 2014Inventors: Tomonori Mitsuru, Yoshinori Itani, Wakako Sakata
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Publication number: 20140203554Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: ApplicationFiled: March 20, 2014Publication date: July 24, 2014Applicant: Kubota CorporationInventors: Shozo Kishi, Takashi Yokomizo, Yoshinori Itani, Takaaki Kagawa, Kohei Ikeda, Shogo Kaneko
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Publication number: 20140035282Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: ApplicationFiled: September 10, 2013Publication date: February 6, 2014Applicant: Kubota CorporationInventors: Shozo Kishi, Takashi Yokomizo, Yoshinori Itani, Takaaki Kagawa, Kohei Ikeda, Shogo Kaneko
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Patent number: 8573654Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: GrantFiled: January 22, 2010Date of Patent: November 5, 2013Assignee: Kubota CorporationInventors: Shozo Kishi, Yoshinori Itani, Kohei Ikeda, Takashi Yokomizo, Takaaki Kagawa
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Publication number: 20110278835Abstract: An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.Type: ApplicationFiled: January 22, 2010Publication date: November 17, 2011Inventors: Shozo Kishi, Yoshinori Itani, Kohei Ikeda, Takashi Yokomizo, Takaaki Kagawa, Shogo Kaneko, Hiroyasu Oohama, Hiroaki Shimizu, Goro Funahashi