Patents by Inventor Koji Tamai
Koji Tamai 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: 11059200Abstract: A die includes a die body, a material supply portion, and a slit portion. The material supply portion includes a material supply surface, and a material supply hole that extends in an extrusion direction from the material supply hole. The slit portion includes an extrusion surface that faces the material supply surface across the material supply hole, and a slit that has a grid shape, opens on the extrusion surface, and communicates with the material supply hole. The slit has a grid point. The material supply hole is provided at a position corresponding to the grid point and coaxially with the grid point. An end of the material supply hole in the extrusion direction includes a throttle hole whose diameter decreases toward the grid point, and a guide hole that extends outward from the throttle hole and guides a material to the slit including the grid point.Type: GrantFiled: August 19, 2019Date of Patent: July 13, 2021Assignee: DENSO CORPORATIONInventors: Nobuhiko Nagai, Koji Tamai
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Patent number: 11020700Abstract: A honeycomb structure body has cell walls, inner cells and outer cells, and a boundary partition wall. The inner cells are arranged in a high cell density area and the outer cells are arranged in a low cell density area. A cell density of the high cell density area is higher than a cell density of the low cell density area. Cell reinforced parts are formed at a first intersection part at which the cell walls intersect each other. Boundary reinforced parts are formed at a second intersection part at which the cell walls and the boundary partition wall intersect each other. The honeycomb structure body satisfies a relationship of Sb>Sc, where Sb indicates an average value of a cross sectional area of the overall boundary reinforced parts, and Si indicates an average value of a cross sectional area of the overall inner cell reinforced parts.Type: GrantFiled: December 3, 2018Date of Patent: June 1, 2021Assignee: DENSO CORPORATIONInventor: Koji Tamai
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Patent number: 11000969Abstract: A metal mold for manufacturing a honeycomb structure having a plurality of cell density regions and an annular boundary wall includes a honeycomb-like slit part, which is opened to an extrusion surface of a single metal mold body, that is formed of a plurality of cell slits for forming the plurality of cell density regions and an annular boundary slit for forming the boundary wall. Out of the plurality of cell slits, adjacent cell slits adjacent to the boundary slit have all corner portions formed in a round shape by the adjacent cell slits and the boundary slit.Type: GrantFiled: January 12, 2017Date of Patent: May 11, 2021Assignee: DENSO CORPORATIONInventors: Koji Tamai, Shigeo Ozaki
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Publication number: 20190366585Abstract: A die includes a die body, a material supply portion, and a slit portion. The material supply portion includes a material supply surface, and a material supply hole that extends in an extrusion direction from the material supply hole. The slit portion includes an extrusion surface that faces the material supply surface across the material supply hole, and a slit that has a grid shape, opens on the extrusion surface, and communicates with the material supply hole. The slit has a grid point. The material supply hole is provided at a position corresponding to the grid point and coaxially with the grid point. An end of the material supply hole in the extrusion direction includes a throttle hole whose diameter decreases toward the grid point, and a guide hole that extends outward from the throttle hole and guides a material to the slit including the grid point.Type: ApplicationFiled: August 19, 2019Publication date: December 5, 2019Inventors: Nobuhiko NAGAI, Koji TAMAI
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Publication number: 20190176077Abstract: A honeycomb structure body has cell walls, inner cells and outer cells, and a boundary partition wall. The inner cells are arranged in a high cell density area and the outer cells are arranged in a low cell density area. A cell density of the high cell density area is higher than a cell density of the low cell density area. Cell reinforced parts are formed at a first intersection part at which the cell walls intersect each other. Boundary reinforced parts are formed at a second intersection part at which the cell walls and the boundary partition wall intersect each other. The honeycomb structure body satisfies a relationship of Sb>Sc, where Sb indicates an average value of a cross sectional area of the overall boundary reinforced parts, and Si indicates an average value of a cross sectional area of the overall inner cell reinforced parts.Type: ApplicationFiled: December 3, 2018Publication date: June 13, 2019Inventor: Koji TAMAI
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Publication number: 20190099917Abstract: A metal mold for manufacturing a honeycomb structure having a plurality of cell density regions and an annular boundary wall includes a honeycomb-like slit part, which is opened to an extrusion surface of a single metal mold body, that is formed of a plurality of cell slits for forming the plurality of cell density regions and an annular boundary slit for forming the boundary wall. Out of the plurality of cell slits, adjacent cell slits adjacent to the boundary slit have all corner portions formed in a round shape by the adjacent cell slits and the boundary slit.Type: ApplicationFiled: January 12, 2017Publication date: April 4, 2019Inventors: Koji TAMAI, Shigeo OZAKI
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Patent number: 10030555Abstract: A honeycomb structure body has a cylindrical outer peripheral wall, partition walls and cells. The cells are surrounded by the partition walls. In a radial cross section of the honeycomb structure body, the cells is divided into cell density sections having different cell densities formed from a central section to the outer peripheral wall. A boundary wall is formed between two cell density sections. Each cell density section has boundary cells and interior cells. The boundary cells are in contact with the boundary wall. The interior cells are not in contact with the boundary wall. In the radial cross section of the honeycomb structure body, an inscribed circle of each of the boundary cells has a diameter of not less than 0.5 mm. Further, an inscribed circle of an interior cell adjacent to the boundary cell also has a diameter of not less than 0.5 mm.Type: GrantFiled: March 26, 2015Date of Patent: July 24, 2018Assignee: DENSO CORPORATIONInventors: Koji Tamai, Masahiro Oonishi
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Patent number: 9976458Abstract: A honeycomb structure body has cell walls arranged in a lattice arrangement and a plurality of cells surrounded by the cell walls. The honeycomb structure body has a cell density distribution in which a cell density is reduced continuously or stepwise from a center portion to an outer peripheral portion in a radial direction. The honeycomb structure body has wave shaped cell walls and flat shaped cell walls which extend in an axial direction. Particularly, the wave shaped cell walls are formed in a formation section having a cell density ratio of not more than 0.85 to a maximum cell density. The region having the flat shaped cell walls is inside the region having the wave shaped cell walls.Type: GrantFiled: March 4, 2015Date of Patent: May 22, 2018Assignee: DENSO CORPORATIONInventor: Koji Tamai
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Publication number: 20150275726Abstract: A honeycomb structure body has a cylindrical outer peripheral wall, partition walls and cells. The cells are surrounded by the partition walls. In a radial cross section of the honeycomb structure body, the cells is divided into cell density sections having different cell densities formed from a central section to the outer peripheral wall. A boundary wall is formed between two cell density sections. Each cell density section has boundary cells and interior cells. The boundary cells are in contact with the boundary wall. The interior cells are not in contact with the boundary wall. In the radial cross section of the honeycomb structure body, an inscribed circle of each of the boundary cells has a diameter of not less than 0.5 mm. Further, an inscribed circle of an interior cell adjacent to the boundary cell also has a diameter of not less than 0.5 mm.Type: ApplicationFiled: March 26, 2015Publication date: October 1, 2015Inventors: Koji TAMAI, Masahiro OONISHI
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Publication number: 20150252704Abstract: A honeycomb structure body has cell walls arranged in a lattice arrangement and a plurality of cells surrounded by the cell walls. The honeycomb structure body has a cell density distribution in which a cell density is reduced continuously or stepwise from a center portion to an outer peripheral portion in a radial direction. The honeycomb structure body has wave shaped cell walls and flat shaped cell walls which extend in an axial direction. Particularly, the wave shaped cell walls are formed in a formation section having a cell density ratio of not more than 0.85 to a maximum cell density. The region having the flat shaped cell walls is inside the region having the wave shaped cell walls.Type: ApplicationFiled: March 4, 2015Publication date: September 10, 2015Inventor: Koji TAMAI
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Patent number: 9073289Abstract: A honeycomb structural body has a central part, an outer-circumferential part and a boundary-partition wall. The central part has central basic-cell walls and central reinforced-cell walls. The outer-circumferential part has outer-circumferential basic-cell walls and outer-circumferential reinforced-cell walls. The body satisfies R1/P1?0.5, R2/P2?0.Type: GrantFiled: January 8, 2014Date of Patent: July 7, 2015Assignee: DENSO CORPORATIONInventors: Koji Tamai, Naohiro Hayashi
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Patent number: 8982067Abstract: A touch operation unit has a manipulated surface accepting a touch operation. An operation detection unit detects a touch operation on the manipulated surface. A moving unit moves the touch operation unit. A movement control unit drives the moving unit to control a movement of the touch operation unit, when the operation detection unit detects a touch operation, to satisfy a predetermined stimulable condition enabling stimulation of a skin sensory receptor. The stimulable condition is a condition of a movement quantity of the touch operation unit and a moving speed of the touch operation unit or a condition of the movement quantity of the touch operation unit and an acceleration of the touch operation unit.Type: GrantFiled: April 10, 2012Date of Patent: March 17, 2015Assignees: Nippon Soken, Inc., Denso CorporationInventors: Norio Sanma, Kunihiro Nakagawa, Koji Tamai
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Publication number: 20140205794Abstract: A honeycomb structural body has a central part, an outer-circumferential part and a boundary-partition wall. The central part has central basic-cell walls and central reinforced-cell walls. The outer-circumferential part has outer-circumferential basic-cell walls and outer-circumferential reinforced-cell walls. The body satisfies R1/P1?0.5, R2/P2?0.Type: ApplicationFiled: January 8, 2014Publication date: July 24, 2014Applicant: DENSO CORPORATIONInventors: Koji TAMAI, Naohiro HAYASHI
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Patent number: 8316908Abstract: [Object] When press-bonding superposed curved glass plates together by a plurality of curved rolls, even if curvature of the curved glass changes, a preliminary bonding method and device of a laminated glass can cope with a variety of curvatures of the curved glass plate by an easy adjustment.Type: GrantFiled: June 16, 2009Date of Patent: November 27, 2012Assignee: Central Glass Company, LimitedInventors: Kenji Ujiie, Yoshiki Katada, Koji Tamai, Chikao Nakashima
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Publication number: 20120262394Abstract: A touch operation unit has a manipulated surface accepting a touch operation. An operation detection unit detects a touch operation on the manipulated surface. A moving unit moves the touch operation unit. A movement control unit drives the moving unit to control a movement of the touch operation unit, when the operation detection unit detects a touch operation, to satisfy a predetermined stimulable condition enabling stimulation of a skin sensory receptor. The stimulable condition is a condition of a movement quantity of the touch operation unit and a moving speed of the touch operation unit or a condition of the movement quantity of the touch operation unit and an acceleration of the touch operation unit.Type: ApplicationFiled: April 10, 2012Publication date: October 18, 2012Applicants: Denso Corporation, Nippon Soken, Inc.Inventors: Norio Sanma, Kunihiro Nakagawa, Koji Tamai
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Publication number: 20120073417Abstract: [Task] A sheet material is cut in a predetermined closed loop shape. [Means for solving task] A cutting apparatus for a sheet material, comprises: an air table which is capable of ejecting or sucking air through a plurality of minute punching sections thereof; a template having at least one recess groove section in a predetermined closed loop shape mounted and fixed onto the air table and a punching section located at each of positions on the template which is coincident with a position of each of the punching sections of the air table; a cutter blade disposed on an upper position of the sheet material mounted on the template to cut the sheet material along the recess groove section of the template; and cutter blade driving means which is capable of moving and rotating the cutter blade in X, Y, and Z coordinate axes.Type: ApplicationFiled: June 2, 2010Publication date: March 29, 2012Applicant: Central Glass Company, LimitedInventors: Kenji Ujiie, Koji Tamai, Chikao Nakashima
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Publication number: 20110100530Abstract: [Object] When press-bonding superposed curved glass plates together by a plurality of curved rolls, even if curvature of the curved glass changes, a preliminary bonding method and device of a laminated glass can cope with a variety of curvatures of the curved glass plate by an easy adjustment.Type: ApplicationFiled: June 16, 2009Publication date: May 5, 2011Inventors: Kenji Ujiie, Yoshiki Katada, Koji Tamai, Chikao Nakashima
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Publication number: 20060121281Abstract: The invention relates, in case that a thermally tempered glass is produced by allowing an impact jet flow from quenching nozzles to blow against the glass, to a process for producing a curved shape, thermally tempered glass, characterized in that a quenching is conducted by simultaneously using at least two types of quenching nozzles having different exit diameters of the quenching nozzles. Furthermore, the invention relates to a curved, thermally tempered glass produced by this process and to an apparatus for producing the thermally tempered glass. In the invention, it is preferable that a exit diameter d is from ?1 mm to ?8 mm, a distance Z between the nozzle and the glass is 1 to 80 mm, a chamber pressure P is in a range of 0.1 to 0.8 MPa, and a heat flux difference is 150 kW/m2 or less. Furthermore, in the thermally tempered glass, it is preferable that a difference of surface compressive stress values within a glass surface is 20 MPa or less.Type: ApplicationFiled: September 3, 2003Publication date: June 8, 2006Applicant: Central Glass Company, LimitedInventors: Koji Tamai, Kazuyoshi Takaya
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Patent number: 6578385Abstract: The invention relates to a frame for supporting a glass plate during a quenching of the glass plate. This frame includes a supporting ring for supporting thereon the glass plate, and a heat-resistant fabric tensioned and covering a top surface of the supporting ring to allow the glass plate to rest on the heat-resistant woven fabric. The supporting ring has a shape substantially conforming to a contour of the glass plate. A quenching air of the tempering is allowed to pass smoothly by tensioning the heat-resistant fabric.Type: GrantFiled: August 10, 2000Date of Patent: June 17, 2003Assignee: Central Glass Company, LimitedInventors: Koji Tamai, Kazuhiro Kumao