Patents by Inventor Katsumi Takatsu
Katsumi Takatsu 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: 10113744Abstract: A ceramic heater-type glow plug that includes a ceramic heater, and a metallic outer cylinder, one end side of which holds the ceramic heater and the other end side of which is inserted in and fixed to an inner hole of a housing.Type: GrantFiled: March 9, 2015Date of Patent: October 30, 2018Assignee: Bosch CorporationInventor: Katsumi Takatsu
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Publication number: 20180112873Abstract: Breakage in a short period is suppressed by improving a heat dissipation property. In a glow plug that includes: a heater element (10) that is inserted in a combustion chamber of an internal combustion engine; a housing (14) that supports the heater element in a state where a heating section of the heater element is projected; a resilient body (31) that couples the heater element and the housing to divide a space between the heater element and the housing into a tip side and a rear end side of the housing; and a pressure sensor (15) that is provided in a space on the rear end side of the resilient body in the housing to detect a pressure in the combustion chamber from displacement of the heater element, a space (142) on the tip side of the resilient body in the housing is filled with a heat transfer material (22) that is melted by heat transferred from the heater element.Type: ApplicationFiled: March 14, 2016Publication date: April 26, 2018Inventor: Katsumi Takatsu
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Publication number: 20170321899Abstract: A method for manufacturing a ceramic heater-type glow plug (1) that includes: a ceramic heater (11); and a metallic outer cylinder (12) that holds the ceramic heater at one end and has the other end inserted in and fixed to a metallic housing (14), the housing having a first housing section (14a) and a second housing section (14b) coaxially arranged with each other, the method for manufacturing a ceramic heater-type glow plug includes the steps of: inserting the ceramic heater in the outer cylinder; inserting the outer cylinder in the first housing section, the second housing section, and a ring-shaped filler material (18) in a state where the filler material is interposed between the first housing section and the second housing section; and joining the first housing section, the second housing section, and the outer cylinder by welding at a position where the filler material is provided.Type: ApplicationFiled: October 8, 2015Publication date: November 9, 2017Inventor: Katsumi Takatsu
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Publication number: 20170321900Abstract: A method for manufacturing a ceramic heater-type glow plug that includes: a ceramic heater; a metallic outer cylinder that holds the ceramic heater at one end and has the other end inserted in and fixed to a metallic housing; and lead wire that is connected to the ceramic heater and electrifies the ceramic heater, the method for manufacturing a ceramic heater-type glow plug includes the steps of: forming a metalized layer in a region of the ceramic heater that is connected to the lead wire; press-inserting at least the metalized layer of the ceramic heater in a connection fitting that connects the ceramic heater and the lead wire; and heating the ceramic heater and the connection fitting at a temperature at which a material for forming the metalized layer is brought into a semi-molten state and joining by mass transfer between the connection fitting and a solid layer of the metalized layer.Type: ApplicationFiled: October 8, 2015Publication date: November 9, 2017Inventor: Katsumi Takatsu
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Patent number: 9683742Abstract: A pressure sensor integrated glow plug inserted inside a cylinder of an internal combustion engine and used, the pressure sensor integrated glow plug being equipped with a housing, a rod-like heater element held with its distal end projecting from the housing, and a pressure sensor, with the heater element being held in the housing by a flexible member and configured in such a way that its position relative to the housing is displaceable, and with the pressure sensor being configured in such a way that it can receive pressure inside the cylinder because of the displacement of the heater element, wherein a heat-resistant fiber member carrying an oxidation catalyst component is disposed in an interstice between the housing and the heater element on the distal end side of the flexible member.Type: GrantFiled: June 20, 2013Date of Patent: June 20, 2017Assignee: Bosch CorporationInventor: Katsumi Takatsu
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Publication number: 20170108218Abstract: A configuration and manufacturing steps of a ceramic heater-type glow plug are simplified when compared to a related art, and a fracture therein is prevented. A ceramic heater-type glow plug that includes a ceramic heater, and a metallic outer cylinder, one end side of which holds the ceramic heater and the other end side of which is inserted in and fixed to an inner hole of a housing.Type: ApplicationFiled: March 9, 2015Publication date: April 20, 2017Inventor: Katsumi TAKATSU
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Publication number: 20170038069Abstract: A manufacturing method of a ceramic heater-type glow plug including: a ceramic heater; and a metallic outer cylinder, one end of which holds the ceramic heater and the other end of which is fixed to a housing has: a step of forming a metallized layer on at least a portion of a surface region in the ceramic heater that is held by the outer cylinder; a step of press-inserting at least the metallized layer of the ceramic heater in the outer cylinder; and a step of heating the ceramic heater and the outer cylinder at a temperature at which a material for forming the metallized layer becomes a semi-molten state and performing joining by mass transfer between the outer cylinder and a solid layer of the metallized layer.Type: ApplicationFiled: April 3, 2015Publication date: February 9, 2017Inventor: Katsumi Takatsu
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Patent number: 9255564Abstract: An arithmetic and control unit is configured to calculate a resistance value of a glow plug on the basis of an energization current of the glow plug and a voltage applied to the glow plug, perform a multiplication of the resistance value and a constant that has been determined beforehand on the basis of an electrical characteristic of the glow plug, input a predetermined heater reference point temperature, calculate an offset with a predetermined offset arithmetic expression from the heater reference point temperature, correct the multiplication result with that offset, and take the correction result as an estimated temperature of a tip of the glow plug.Type: GrantFiled: January 12, 2012Date of Patent: February 9, 2016Assignee: Bosch CorporationInventors: Yasuo Toyoshima, Katsumi Takatsu
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Publication number: 20150300643Abstract: A pressure sensor integrated glow plug inserted inside a cylinder of an internal combustion engine and used, the pressure sensor integrated glow plug being equipped with a housing, a rod-like heater element held with its distal end projecting from the housing, and a pressure sensor, with the heater element being held in the housing by a flexible member and configured in such a way that its position relative to the housing is displaceable, and with the pressure sensor being configured in such a way that it can receive pressure inside the cylinder because of the displacement of the heater element, wherein a heat-resistant fiber member carrying an oxidation catalyst component is disposed in an interstice between the housing and the heater element on the distal end side of the flexible member.Type: ApplicationFiled: June 20, 2013Publication date: October 22, 2015Inventor: Katsumi Takatsu
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Publication number: 20140138373Abstract: A ceramic heater-type glow plug is provided that is configured so that, even when a deformation occurs in a metal outer cylinder, stress propagating to the connection between one electrode of a ceramic heater and an electrode lead-out member can be reduced to prevent the ceramic heater and the electrode lead-out member from being damaged. In the ceramic heater-type glow plug in which heat-resistant insulating particles are sealed into the metal outer cylinder as a sealing material, at least an area around the connection between the one electrode and the electrode lead-out member is filled with a mixed insulating powder mixed with a lubricity enhancing material for improving lubricity among the heat-resistant insulating particles.Type: ApplicationFiled: April 4, 2012Publication date: May 22, 2014Applicant: BOSCH CORPORATIONInventor: Katsumi Takatsu
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Publication number: 20120175360Abstract: An arithmetic and control unit is configured to calculate a resistance value of a glow plug on the basis of an energization current of the glow plug and a voltage applied to the glow plug, perform a multiplication of the resistance value and a constant that has been determined beforehand on the basis of an electrical characteristic of the glow plug, input a predetermined heater reference point temperature, calculate an offset with a predetermined offset arithmetic expression from the heater reference point temperature, correct the multiplication result with that offset, and take the correction result as an estimated temperature of a tip of the glow plug.Type: ApplicationFiled: January 12, 2012Publication date: July 12, 2012Applicant: BOSCH CORPORATIONInventors: Yasuo Toyoshima, Katsumi Takatsu
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Patent number: 5940022Abstract: An electromagnetic wave absorber comprises a substrate made from a material which rarely absorbs a microwave and an electromagnetic wave absorbing layer formed on the surface of the barrier of the substrate, the electromagnetic wave absorbing layer is made from a mixture of an electroconductive metal oxide and an insulating material, and the impedance of the electromagnetic wave absorbing layer is adjusted to the impedance of a medium through which the microwave is transmitted such that reflection power ratio becomes 10 dB or more.Type: GrantFiled: April 7, 1998Date of Patent: August 17, 1999Assignee: Zexel CorporationInventor: Katsumi Takatsu