Patents by Inventor Junya Hoshi
Junya Hoshi 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: 8714562Abstract: A lip type end face sealing device having excellent sealability to different kinds of liquids on both sides in the axial direction and having excellent durability. A case is tight fitted to an inner peripheral face of a housing and includes case members. One pair of seal lips is integrally fitted to inner peripheral flange parts, positioned oppositely each other in the axial direction, and opened in a tapered shape. One pair of the seal lips is slidably contacted with flange parts of slingers tight fitted to an outer periphery of a rotary shaft. Pressure in seal internal spaces between the seal lips is released through a vent hole.Type: GrantFiled: August 18, 2010Date of Patent: May 6, 2014Assignee: NOK CorporationInventors: Takehiro Nakagawa, Akihiro Sato, Tetsuo Tasaki, Hiromi Takahashi, Junya Hoshi, Hiroshi Okubo, Masahiro Anzai
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Patent number: 8101096Abstract: The present invention provides a conductive rubber member which exhibits low electrical resistance, and has properties that are less affected by environmental factors, and excellent staining resistance. The conductive rubber member of the present invention has a base rubber predominantly containing epichlorohydrin rubber, and a conductive elastic layer which is formed, through hardening and molding of a rubber composition, wherein the rubber composition contains, as vulcanizing agents, a thiourea-type vulcanizing agent and a thiuram-type vulcanizing agent, and contains no elemental sulfur.Type: GrantFiled: June 1, 2009Date of Patent: January 24, 2012Assignee: Synztec Co., Ltd.Inventor: Junya Hoshi
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Patent number: 7875331Abstract: A conductive rubber member having at least one conductive elastic layer, wherein the conductive elastic layer, which is at least an outermost layer, in contact with an opposing member during use is a curing product of a rubber composition having a conductivity imparting agent incorporated into a rubber base material containing chloroprene rubber; and a superficial portion of the conductive elastic layer is a surface treatment layer formed by impregnating the conductive elastic layer with a surface treating solution containing at least an isocyanate component and an organic solvent.Type: GrantFiled: October 30, 2006Date of Patent: January 25, 2011Assignee: Synztec Co., Ltd.Inventors: Naoki Hirakawa, Junya Hoshi
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Publication number: 20100314837Abstract: A lip type end face sealing device having excellent sealability to different kinds of liquids on both sides in the axial direction and having excellent durability. A case is tight fitted to an inner peripheral face of a housing and includes case members. One pair of seal lips is integrally fitted to inner peripheral flange parts, positioned oppositely each other in the axial direction, and opened in a tapered shape. One pair of the seal lips is slidably contacted with flange parts of slingers tight fitted to an outer periphery of a rotary shaft. Pressure in seal internal spaces between the seal lips is released through a vent hole.Type: ApplicationFiled: August 18, 2010Publication date: December 16, 2010Applicant: NOK CORPORATIONInventors: Takehiro Nakagawa, Akihiro Sato, Tetsuo Tasaki, Hiromi Takahashi, Junya Hoshi, Hiroshi Okubo, Masahiro Anzai
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Patent number: 7806412Abstract: An objective of the present invention is to provide a lip type end face sealing device 6 having excellent sealability to different kinds of liquids on the both sides in the axial direction and having excellent durability. A case 61 tight fitted to an inner peripheral face 2a of a housing 2 comprises case members 611 and 612. One pair of seal lips 62 and 63 is integrally fitted to inner peripheral flange parts 611b and 612b, positioned oppositely each other in the axial direction, and opened in a tapered shape. One pair of the seal lips 62 and 63 is slidably contacted with flange parts 64b and 65b of slingers 64 and 65 tight fitted to an outer periphery of a rotary shaft 3. Pressure in seal internal spaces S2 between the both seal lips 62 and 63 and the both slingers 64 and 65 is released through a vent hole 22 opened on the inner peripheral face 2a of the housing 2, an air hole 611c opened on the case 61, and between the case members 611 and 612.Type: GrantFiled: June 16, 2005Date of Patent: October 5, 2010Assignee: NOK CorporationInventors: Takehiro Nakagawa, Akihiro Sato, Tetsuo Tasaki, Hiromi Takahashi, Junya Hoshi, Hiroshi Okubo, Masahiro Anzai
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Patent number: 7638196Abstract: A conductive rubber member having at least one conductive elastic layer, wherein the conductive elastic layer, which is at least an outermost layer, in contact with an opposing member during use is a curing product of a rubber composition having a conductivity imparting agent incorporated into a rubber base material containing acrylonitrile-butadiene rubber (NBR); and a superficial portion of the conductive elastic layer is a surface treatment layer formed by impregnating the conductive elastic layer with a surface treating solution containing at least an isocyanate component and an organic solvent.Type: GrantFiled: November 15, 2006Date of Patent: December 29, 2009Assignee: Synztec Co., Ltd.Inventors: Naoki Hirakawa, Junya Hoshi
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Publication number: 20090294737Abstract: The present invention provides a conductive rubber member which exhibits low electrical resistance, and has properties that are less affected by environmental factors, and excellent staining resistance. The conductive rubber member of the present invention has a base rubber predominantly containing epichlorohydrin rubber, and a conductive elastic layer which is formed, through hardening and molding of a rubber composition, wherein the rubber composition contains, as vulcanizing agents, a thiourea-type vulcanizing agent and a thiuram-type vulcanizing agent, and contains no elemental sulfur.Type: ApplicationFiled: June 1, 2009Publication date: December 3, 2009Applicant: SYNTEC CO., LTD.Inventor: Junya HOSHI
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Patent number: 7537717Abstract: A method of manufacturing a two-layer roll having a foamed elastic layer provided on a core, and an elastic layer provided on the foamed elastic layer includes the steps of forming the elastic layer by use of a cylindrical mold holding a first cylindrical member used to form the outer cylindrical surface of the elastic layer, the first cylindrical member being manufactured by means of machining a solid member; forming a solid primary layer on the core by means of side extrusion; setting the formed elastic layer and the core having the solid primary layer formed thereon in a second cylindrical member of a foaming mold; and foaming the solid primary layer into the foamed elastic layer to form the two-layer roll having the formed elastic layer and the elastic layer.Type: GrantFiled: July 16, 2004Date of Patent: May 26, 2009Assignee: Synztec Co., Ltd.Inventors: Takashi Noda, Junya Hoshi, Takeshi Yanobe, Shinobu Hasegawa
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Publication number: 20080029967Abstract: An objective of the present invention is to provide a lip type end face sealing device 6 having excellent sealability to different kinds of liquids on the both sides in the axial direction and having excellent durability. A case 61 tight fitted to an inner peripheral face 2a of a housing 2 comprises case members 611 and 612. One pair of seal lips 62 and 63 is integrally fitted to inner peripheral flange parts 611b and 612b, positioned oppositely each other in the axial direction, and opened in a tapered shape. One pair of the seal lips 62 and 63 is slidably contacted with flange parts 64b and 65b of slingers 64 and 65 tight fitted to an outer periphery of a rotary shaft 3. Pressure in seal internal spaces S2 between the both seal lips 62 and 63 and the both slingers 64 and 65 is released through a vent hole 22 opened on the inner peripheral face 2a of the housing 2, an air hole 611c opened on the case 61, and between the case members 611 and 612.Type: ApplicationFiled: June 16, 2005Publication date: February 7, 2008Applicant: NOK CORPORATIONInventors: Takehiro Nakagawa, Akihiro Sato, Tetsuo Tasaki, Hiromi Takahashi, Junya Hoshi, Hiroshi Okubo, Masahiro Anzai
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Publication number: 20070110936Abstract: A conductive rubber member having at least one conductive elastic layer, wherein the conductive elastic layer, which is at least an outermost layer, in contact with an opposing member during use is a curing product of a rubber composition having a conductivity imparting agent incorporated into a rubber base material containing acrylonitrile-butadiene rubber (NBR); and a superficial portion of the conductive elastic layer is a surface treatment layer formed by impregnating the conductive elastic layer with a surface treating solution containing at least an isocyanate component and an organic solvent.Type: ApplicationFiled: November 15, 2006Publication date: May 17, 2007Inventors: Naoki Hirakawa, Junya Hoshi
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Publication number: 20070104906Abstract: A conductive rubber member having at least one conductive elastic layer, wherein the conductive elastic layer, which is at least an outermost layer, in contact with an opposing member during use is a curing product of a rubber composition having a conductivity imparting agent incorporated into a rubber base material containing chloroprene rubber; and a superficial portion of the conductive elastic layer is a surface treatment layer formed by impregnating the conductive elastic layer with a surface treating solution containing at least an isocyanate component and an organic solvent.Type: ApplicationFiled: October 30, 2006Publication date: May 10, 2007Inventors: Naoki Hirakawa, Junya Hoshi
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Publication number: 20050029693Abstract: A method of manufacturing a two-layer roll having a foamed elastic layer provided on a core, and an elastic layer provided on the foamed elastic layer includes the steps of forming the elastic layer, which has a length of 200 mm to 400 mm and outside diameter of 16 mm or less, by use of a cylindrical mold holding a first cylindrical member used to form the outer cylindrical surface of the elastic layer, the first cylindrical member being manufactured by means of machining a solid member; forming a solid primary layer, which has a length of 200 mm to 400 mm and is to be foamed into the foamed elastic layer, on the core by means of side extrusion; setting the formed elastic layer and the core having the solid primary layer formed thereon in a second cylindrical member of a foaming mold; and foaming the solid primary layer into the foamed elastic layer to form the two-layer roll having the formed elastic layer and the elastic layer, the formed elastic layer and elastic layer having a length of 200 mm to 400 mm.Type: ApplicationFiled: July 16, 2004Publication date: February 10, 2005Inventors: Takashi Noda, Junya Hoshi, Takeshi Yanobe, Shinobu Hasegawa
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Patent number: 6534180Abstract: An object of the invention is to provide a charge-imparting member which can be produced at low cost and maintains superior characteristics for a long period of time. The invention provides a charge-imparting member including an elastic layer formed of an epichlorohydrin rubber material and a surface-treated layer formed by use of a surface treatment liquid containing at least one polymer selected from among an acrylic fluoropolymer and an acrylic silicone polymer; a conductivity-imparting agent; and an isocyanate component.Type: GrantFiled: May 16, 2001Date of Patent: March 18, 2003Assignee: Hokushin CorporationInventor: Junya Hoshi
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Publication number: 20010055687Abstract: An object of the invention is to provide a charge-imparting member which can be produced at low cost and maintains superior characteristics for a long period of time. The invention provides a charge-imparting member including an elastic layer formed of an epichlorohydrin rubber material and a surface-treated layer formed by use of a surface treatment liquid containing at least one polymer selected from among an acrylic fluoropolymer and an acrylic silicone polymer; a conductivity-imparting agent; and an isocyanate component.Type: ApplicationFiled: May 16, 2001Publication date: December 27, 2001Applicant: HOKUSHIN CORPORATIONInventor: Junya Hoshi