Patents by Inventor Mikio Ishihara
Mikio Ishihara 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: 7553442Abstract: An exhaust gas purifying filter is made of a ceramic material in a honeycomb structure having introduction passages for introducing exhaust gas that includes particulate matter emitted from an internal combustion engine, porous walls that collect the particulate matter and exhaust passages for exhausting the exhaust gas after the particulate matter has been removed therefrom, with the porous walls supporting a catalyst for oxidizing and removing the particulate matter. The porosity of the porous wall is in a range from 55 to 80%, the mean pore size is in-a range from 30 to 50 ?m, and the total volume X of the pores included in the exhaust gas purifying filter and the volume Y of the pores that are not smaller than 100 ?m satisfy the relation of inequality Y/X?0.05.Type: GrantFiled: March 27, 2007Date of Patent: June 30, 2009Assignee: Denso CorporationInventors: Mamoru Nishimura, Mikio Ishihara, Hirofumi Yamashita, Hiromi Sano
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Patent number: 7504057Abstract: In a method of manufacturing an exhaust gas purifying filter that captures and purifies particulates involved in an exhaust gas emitted from an internal combustion engine, a honeycomb mold body of a desired length is firstly made by an extrusion molding step. In a sealing and enlarging step, tapered front parts of a multi-taper jig are inserted into the corresponding openings of the cells. The multi-taper jig is then oscillatory moved in a direction perpendicular to a longitudinal length of the ceramic mold body while heating the partition walls forming the cells, so that the opening of one cell is closed and sealed completely and the opening of the adjacent cell is enlarged in area. Finally, the honeycomb mold body is burned.Type: GrantFiled: February 27, 2006Date of Patent: March 17, 2009Assignee: Denso CorporationInventors: Satoshi Ishikawa, Mikio Ishihara, Kazuhide Sato
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Publication number: 20090057929Abstract: A power module includes: an encapsulation-target portion having at least one semiconductor element; and an encapsulation member that has first and second planes between which the encapsulation-target portion is interposed, and that encapsulates the encapsulation-target portion. The encapsulation member has, on the at least one semiconductor element, at least one opening that exposes part of a surface of the encapsulation-target portion the surface being on a side of the first plane. Thus, a semiconductor device of which size can be reduced can be provided.Type: ApplicationFiled: March 19, 2008Publication date: March 5, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Taishi SASAKI, Mikio ISHIHARA
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Publication number: 20070163117Abstract: An exhaust gas purifying filter is made of a ceramic material in a honeycomb structure having introduction passages for introducing exhaust gas that includes particulate matter emitted from an internal combustion engine, porous walls that collect the particulate matter and exhaust passages for exhausting the exhaust gas after the particulate matter has been removed therefrom, with the porous walls supporting a catalyst for oxidizing and removing the particulate matter. The porosity of the porous wall is in a range from 55 to 80%, the mean pore size is in-a range from 30 to 50 ?m, and the total volume X of the pores included in the exhaust gas purifying filter and the volume Y of the pores that are not smaller than 100 ?m satisfy the relation of inequality Y/X?0.05.Type: ApplicationFiled: March 27, 2007Publication date: July 19, 2007Applicant: DENSO CORPORATIONInventors: Mamoru NISHIMURA, Mikio ISHIHARA, Hirofumi YAMASHITA, Hiromi SANO
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Patent number: 7204965Abstract: A filter catalyst is for purifying exhaust gases emitted from internal combustion engines and including particulates, and includes a wall-flow honeycomb structure and an upstream-side straight honeycomb structure. The wall-flow honeycomb structure includes inlet cells clogged on the downstream side of the exhaust gases, outlet cells neighboring the inlet cells and clogged on the upstream side of the exhaust gases, filter cellular walls demarcating the inlet cells and the outlet cells and having pores, and a catalytic layer formed on the surface of the filter cellular walls and/or the surface of the pores of the filter cellular walls. The upstream-side straight honeycomb structure is disposed on the upstream side of the exhaust gases with respect to the wall-flow honeycomb structure, is provided integrally with the wall-flow honeycomb structure, and includes upstream-side straight cells in which the exhaust gases flow straight, and upstream-side cellular walls demarcating the upstream-side straight cells.Type: GrantFiled: June 5, 2003Date of Patent: April 17, 2007Assignees: Toyota Jidosha Kabushiki Kaisha, Denso CorporationInventors: Seiji Okawara, Mamoru Nishimura, Mikio Ishihara
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Publication number: 20060249888Abstract: An exhaust gas purifying filter having a high strength and an excellent efficiency of exhaust gas purification and a method for manufacturing the same are provided. An exhaust gas purifying filter 1 comprises a ceramic honeycomb structure 2 having a surrounding wall 21, partition walls 22 provided in a honeycomb pattern within the surrounding wall 21, and a plurality of cells 23 partitioned by the partition walls 22 and penetrating through end faces 241, 242. If a virtual line 3 is drawn on the end faces 241, 242 of the structure 2 by continuously connecting points at a distance of 1.0 to 3.0 times the cell pitch in the direction toward the center from an inner surface 211 of the surrounding wall 21, not less than 90% of a peripheral area 25 outside the virtual line 3 is blocked with plug material 4.Type: ApplicationFiled: July 20, 2006Publication date: November 9, 2006Inventors: Mikio Ishihara, Mamoru Nishimura
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Publication number: 20060197252Abstract: In a method of manufacturing an exhaust gas purifying filter that captures and purifies particulates involved in an exhaust gas emitted from an internal combustion engine, a honeycomb mold body of a desired length is firstly made by an extrusion molding step. In a sealing and enlarging step, tapered front parts of a multi-taper jig are inserted into the corresponding openings of the cells. The multi-taper jig is then oscillatory moved in a direction perpendicular to a longitudinal length of the ceramic mold body while heating the partition walls forming the cells, so that the opening of one cell is closed and sealed completely and the opening of the adjacent cell is enlarged in area. Finally, the honeycomb mold body is burned.Type: ApplicationFiled: February 27, 2006Publication date: September 7, 2006Applicant: DENSO CORPORATIONInventors: Satoshi Ishikawa, Mikio Ishihara, Kazuhide Sato
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Patent number: 7101601Abstract: An exhaust gas purifying filter having a high strength and an excellent efficiency of exhaust gas purification and a method for manufacturing the same are provided. An exhaust gas purifying filter 1 comprises a ceramic honeycomb structure 2 having a surrounding wall 21, partition walls 22 provided in a honeycomb pattern within the surrounding wall 21, and a plurality of cells 23 partitioned by the partition walls 22 and penetrating through end faces 241, 242. If a virtual line 3 is drawn on the end faces 241, 242 of the structure 2 by continuously connecting points at a distance of 1.0 to 3.0 times the cell pitch in the direction toward the center from an inner surface 211 of the surrounding wall 21, not less than 90% of a peripheral area 25 outside the virtual line 3 is blocked with plug material 4.Type: GrantFiled: October 9, 2003Date of Patent: September 5, 2006Assignee: Denso CorporationInventors: Mikio Ishihara, Mamoru Nishimura
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Publication number: 20050163675Abstract: The present invention provides an exhaust gas purifying filter that has an increased contact area, between a catalyst supported on the dividing walls of a honeycomb structural body and particulate matter deposited thereon, and can improve the capacity of the catalyst to oxidize the particulate matter, and a method of manufacturing the same. According to the present invention, the exhaust gas purifying filter 1 comprising the honeycomb structural body 10 made of ceramic and the catalyst 2 supported on the surface of the dividing walls 11 of the honeycomb structural body 10 has void ratio, of the dividing wall 11 of the honeycomb structural body 10, in a range from 55 to 80%, and the proportion of surface pores is 20% or higher.Type: ApplicationFiled: March 24, 2005Publication date: July 28, 2005Applicants: Denso Corporation, Toyota Jidosha Kabushiki KaishaInventors: Mamoru Nishimura, Mikio Ishihara, Yoshitsugu Ogura
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Patent number: 6887826Abstract: The present invention provides an exhaust gas purifying filter that has an increased contact area, between a catalyst supported on the dividing walls of a honeycomb structural body and particulate matter deposited thereon, and can improve the capacity of the catalyst to oxidize the particulate matter, and a method of manufacturing the same. According to the present invention, the exhaust gas purifying filter 1 comprising the honeycomb structural body 10 made of ceramic and the catalyst 2 supported on the surface of the dividing walls 11 of the honeycomb structural body 10 has void ratio, of the dividing wall 11 of the honeycomb structural body 10, in a range from 55 to 80%, and the proportion of surface pores is 20% or higher.Type: GrantFiled: May 29, 2002Date of Patent: May 3, 2005Assignees: Denso Corporation, Toyota Jidosha Kabushiki KaishaInventors: Mamoru Nishimura, Mikio Ishihara, Yoshitsugu Ogura
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Patent number: 6863705Abstract: A ceramic material containing organic binder is formed by extrusion, dried and cut off so as to make the honeycomb body 100 having the bulkheads 11 and a plurality of cells 12 partitioned by the bulkheads 11 and penetrating between both end faces of the honeycomb body 100. The tapered jig 3 having a tapered forward end portion 31 is inserted into the opening 13 of the cell 12 of the honeycomb body 100. Then, the bulkheads 11 are heated and softened and deformed by a pushing force given by the tapered jig 3 so that the opening 13 of the cell 12 is expanded to form the large opening 131, and the opening 13 of the adjoining cell 12 is reduced at the same time so as to form the small opening 132. After that, the honeycomb body 100 is fired. In this way, the exhaust gas purifying filter for collecting particulates is manufactured.Type: GrantFiled: August 21, 2002Date of Patent: March 8, 2005Assignee: Denso CorporationInventors: Mikio Ishihara, Mamoru Nishimura
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Publication number: 20040239011Abstract: Method of manufacturing an exhaust gas purifying filter capable of purifying an exhaust gas.Type: ApplicationFiled: April 23, 2004Publication date: December 2, 2004Applicant: DENSO CORPORATIONInventor: Mikio Ishihara
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Patent number: 6814774Abstract: An exhaust purification filter having high filter efficiency and low pressure loss. The exhaust purification filter purifies exhaust gas by trapping particulate matter contained in exhaust gas discharged from an internal combustion engine. The exhaust gas purification filter has a honeycomb structure composed of partitions having a large number of pores, and cells separated by the partitions. The surface opening area of the partitions attributable to pores having a surface opening diameter of 10 &mgr;m or less is 20% or less of the total surface opening area ratio.Type: GrantFiled: August 1, 2002Date of Patent: November 9, 2004Assignee: Denso CorporationInventors: Mikio Ishihara, Mamoru Nishimura
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Patent number: 6800107Abstract: An exhaust gas purifying filter employs plugs that can be used as part of filter. The exhaust gas purifying filter has a honeycomb structure including a multitude of cells each surrounded by walls. Each of the cells is stopped with a plug on one end and the walls and the plugs are all made of a porous material. The value of M=(L/t)×(P1/P2) is in a range of 10<M<90, where P1 is the porosity of the walls, P 2 is the porosity of plugs, t is mean thickness of the walls and L is mean length of the plugs.Type: GrantFiled: April 17, 2002Date of Patent: October 5, 2004Assignee: Denso CorporationInventors: Mikio Ishihara, Mamoru Nishimura, Makoto Saito
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Patent number: 6790248Abstract: An exhaust gas filter is capable of suppressing the generation of an excessive pressure loss due to the particulates deposited. At least a part of a multiplicity of cells surrounded by partitioning walls of the honeycombed exhaust gas purification filter have plugs on one of their two end portions. At least a part of the cells to be arranged on the downstream side in the fluid path are partial plugs having openings allowing the fluid flow. The pressure loss caused when the fluid entering the cells passes through the partitioning walls is smaller than the pressure loss caused when the exhaust gas passes through the partial plugs.Type: GrantFiled: December 20, 2001Date of Patent: September 14, 2004Assignee: Denso CorporationInventors: Mikio Ishihara, Mamoru Nishimura, Hirohumi Yamashita
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Patent number: 6764527Abstract: A honeycomb structure comprising at least one main honeycomb structure 10 and sub-honeycomb structures 21, 22 axially disposed, in series, on both end surfaces of the main honeycomb structure 10. Partial plugs 15 are constituted for some of the cells 11 of the main honeycomb structure 10 by facing the intersecting portions of partitioning walls 211, surrounding the cells of the sub-honeycomb structure 21 disposed adjacent to the main honeycomb structure with some of the cells of main honeycomb structure, and the arrangement of the partial plugs 15 at one end surface 101 of the main honeycomb structure differs from that at the other end surface of the main honeycomb structure 10.Type: GrantFiled: February 5, 2002Date of Patent: July 20, 2004Assignee: Denso CorporationInventors: Mikio Ishihara, Mamoru Nishimura
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Publication number: 20040071932Abstract: An exhaust gas purifying filter having a high strength and an excellent efficiency of exhaust gas purification and a method for manufacturing the same are provided. An exhaust gas purifying filter 1 comprises a ceramic honeycomb structure 2 having a surrounding wall 21, partition walls 22 provided in a honeycomb pattern within the surrounding wall 21, and a plurality of cells 23 partitioned by the partition walls 22 and penetrating through end faces 241, 242. If a virtual line 3 is drawn on the end faces 241, 242 of the structure 2 by continuously connecting points at a distance of 1.0 to 3.0 times the cell pitch in the direction toward the center from an inner surface 211 of the surrounding wall 21, not less than 90% of a peripheral area 25 outside the virtual line 3 is blocked with plug material 4.Type: ApplicationFiled: October 9, 2003Publication date: April 15, 2004Applicant: Denso CorporationInventors: Mikio Ishihara, Mamoru Nishimura
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Publication number: 20040018123Abstract: A filter catalyst is for purifying exhaust gases emitted from internal combustion engines and including particulates, and includes a wall-flow honeycomb structure and an upstream-side straight honeycomb structure. The wall-flow honeycomb structure includes inlet cells clogged on the downstream side of the exhaust gases, outlet cells neighboring the inlet cells and clogged on the upstream side of the exhaust gases, filter cellular walls demarcating the inlet cells and the outlet cells and having pores, and a catalytic layer formed on the surface of the filter cellular walls and/or the surface of the pores of the filter cellular walls. The upstream-side straight honeycomb structure is disposed on the upstream side of the exhaust gases with respect to the wall-flow honeycomb structure, is provided integrally with the wall-flow honeycomb structure, and includes upstream-side straight cells in which the exhaust gases flow straight, and upstream-side cellular walls demarcating the upstream-side straight cells.Type: ApplicationFiled: June 5, 2003Publication date: January 29, 2004Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Seiji Okawara, Mamoru Nishimura, Mikio Ishihara
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Publication number: 20030041575Abstract: A ceramic material containing organic binder is formed by extrusion, dried and cut off so as to make the honeycomb body 100 having the bulkheads 11 and a plurality of cells 12 partitioned by the bulkheads 11 and penetrating between both end faces of the honeycomb body 100. The tapered jig 3 having a tapered forward end portion 31 is inserted into the opening 13 of the cell 12 of the honeycomb body 100. Then, the bulkheads 11 are heated and softened and deformed by a pushing force given by the tapered jig 3 so that the opening 13 of the cell 12 is expanded to form the large opening 131, and the opening 13 of the adjoining cell 12 is reduced at the same time so as to form the small opening 132. After that, the honeycomb body 100 is fired. In this way, the exhaust gas purifying filter for collecting particulates is manufactured.Type: ApplicationFiled: August 21, 2002Publication date: March 6, 2003Inventors: Mikio Ishihara, Mamoru Nishimura
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Publication number: 20030039598Abstract: An exhaust gas purifying filter that does not break and melt and has high capacity to remove particulate matter, and a method of manufacturing the same, are provided.Type: ApplicationFiled: March 22, 2002Publication date: February 27, 2003Applicant: DENSO CORPORATIONInventors: Mamoru Nishimura, Mikio Ishihara, Hirofumi Yamashita, Hiromi Sano