Patents by Inventor Kenichiro Takada
Kenichiro Takada 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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Publication number: 20230361548Abstract: An electrical junction box for a vehicle includes a bus bar, and the bus bar is provided with a through hole for transferring the bus bar. The bus bar can be efficiently transferred by engaging hooks provided at a leading end of a pin chuck device with the transfer through hole, for example.Type: ApplicationFiled: January 22, 2021Publication date: November 9, 2023Inventors: Maiko ODA, Takumi EJIMA, Keiji MATSUOKA, Kenichiro TAKADA
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Patent number: 7816846Abstract: A spark plug for an internal combustion engine is provided which includes a hollow cylindrical metal shell with an open end portion to be exposed to a combustion chamber of the engine, a ground electrode joined to the metal shell, a center electrode disposed in the metal housing to define a spark gap between itself and the ground electrode. The spark plug also includes a stream shaper or a stream reflector geometrically formed on the metal shell and/or the porcelain insulator to shape a vortex steam of air-fuel mixture into a stream thereof which is oriented outside the spark plug or serves to decrease the amount of the air-fuel mixture into a pocket between the metal shell and the porcelain insulator. This ensures the stability of ignition of the air-fuel mixture.Type: GrantFiled: October 24, 2007Date of Patent: October 19, 2010Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Kenichiro Takada, Ken Hanashi, Takayuki Takeuchi
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Patent number: 7714490Abstract: A spark plug for an internal combustion engine and related manufacturing method are disclosed having a metal shell, a porcelain insulator, a center electrode and a ground electrode. The center electrode includes a substantially columnar shaped base material body, and a substantially square shaped rod-like Ir alloy tip bonded to a leading end portion of the base material body. The leading end portion has a diameter D2 smaller than a diameter D1 of the base material body. The Ir alloy tip has a square shape with a long diagonal line supposed to form a diameter A of a circumscribed circle CA of the Ir alloy tip whose inscribed circle CB is coaxial with the circumscribed circle CA and has a diameter B, with four diameters A, B, D1 and D2 lay in the relationship expressed as D1>A>D2>B.Type: GrantFiled: March 6, 2007Date of Patent: May 11, 2010Assignee: Denso CorporationInventor: Kenichiro Takada
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Publication number: 20080093965Abstract: A spark plug for an internal combustion engine is provided which includes a hollow cylindrical metal shell with an open end portion to be exposed to a combustion chamber of the engine, a ground electrode joined to the metal shell, a center electrode disposed in the metal housing to define a spark gap between itself and the ground electrode. The spark plug also includes a stream shaper or a stream reflector geometrically formed on the metal shell and/or the porcelain insulator to shape a vortex steam of air-fuel mixture into a stream thereof which is oriented outside the spark plug or serves to decrease the amount of the air-fuel mixture into a pocket between the metal shell and the porcelain insulator. This ensures the stability of ignition of the air-fuel mixture.Type: ApplicationFiled: October 24, 2007Publication date: April 24, 2008Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.Inventors: Kenichiro Takada, Ken Hanashi, Takayuki Takeuchi
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Publication number: 20070216276Abstract: A spark plug for an internal combustion engine and related manufacturing method are disclosed having a metal shell, a porcelain insulator, a center electrode and a ground electrode. The center electrode includes a substantially columnar shaped base material body, and a substantially square shaped rod-like Ir alloy tip bonded to a leading end portion of the base material body. The leading end portion has a diameter D2 smaller than a diameter D1 of the base material body. The Ir alloy tip has a square shape with a long diagonal line supposed to form a diameter A of a circumscribed circle CA of the Ir alloy tip whose inscribed circle CB is coaxial with the circumscribed circle CA and has a diameter B, with four diameters A, B, D1 and D2 lay in the relationship expressed as D1>A>D2>B.Type: ApplicationFiled: March 6, 2007Publication date: September 20, 2007Applicant: DENSO CORPORATIONInventor: Kenichiro Takada
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Publication number: 20070091542Abstract: A spark plug and a method of manufacturing same is provided a spark plug for an internal combustion engine comprising, a center electrode 2, a ground electrode 3 is formed a spark discharge gap G with the center electrode 2, a housing welded to the end portion 31 of the ground electrode 3. The surface of the housing 4 is formed a plated layer 5 whose melting point is lower than the melting point of the housing 4 and is lower than the melting point of the ground electrode 3. There is substantially no the plated layer 5 on a junction boundary face between the housing 4 and the ground electrode 3. The burr including constituents of the plated layer 5 lies next to the junction boundary face 11.Type: ApplicationFiled: October 19, 2006Publication date: April 26, 2007Applicant: DENSO CORPORATIONInventor: Kenichiro Takada
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Patent number: 6952295Abstract: A hologram screen 1 displays an image by diffracting and scattering image light 31 projected from an image projection apparatus 2. An upward/downward light scattering device 13, which scatters light incident from an upward/downward specific angle range spreading obliquely upward or downward, is placed on the image projection apparatus side of a hologram device 12 in the hologram screen 1. A leftward/rightward light scattering device 14, which scatters light incident from a leftward/rightward specific angle range spreading obliquely leftward and rightward, is placed between the hologram device 12 and the scattering device 13. The construction is such that the upward/downward specific angle range contains the incidence angle of the image light 31 on the hologram screen 1, and thus provides a hologram screen having good color reproducibility and which permits viewing of the background.Type: GrantFiled: January 4, 2002Date of Patent: October 4, 2005Assignee: Denso CorporationInventors: Kazunori Suzuki, Kenichiro Takada
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Patent number: 6885483Abstract: In a hologram screen for reproducing an image based on an output light obtained by scattering and diffusing an image light from an image projector, when a white light (image light) is projected on the hologram screen; and when a distance between two points at optional two points A and B on a surface of the hologram screen is given by 20 cm or less, and a value of the CIE 1976 chromaticity coordinate (u?, v?) at the point A is given by (u?A, v?A) and the value of the CIE 1976 chromaticity coordinate (u?, v?) at the point B is given by (u?B, v?B); the output light perpendicularly from the surface of the hologram screen has a color distribution in which a color difference ?u?v?between two points A and B is derived from the following formula (1) and given by 0.Type: GrantFiled: June 15, 2004Date of Patent: April 26, 2005Assignee: DENSO CorporationInventor: Kenichiro Takada
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Patent number: 6852452Abstract: A method of fabricating a hologram screen having a large visual range and a hologram imaging apparatus used for the particular method of fabricating the hologram screen are disclosed. A plurality of mirrors (3) extended toward a plurality of photosensitive members (5) are arranged at a plurality of end portions (21), respectively, of a light diffuser (2). At least a reference beam (41) and object beams (42) passed through the light diffuser (2) are radiated on a plurality of the photosensitive members (5) individually thereby to form a plurality of holograms. These holograms are integrated with each other by being arranged two-dimensionally thereby to fabricate a hologram screen. Among the mirrors (3), a reference beam-side mirror (31) arranged nearer to the light source of the reference beams (41) is extended from the light diffuser (2) by a length varied with the position of the photosensitive member (5) to be exposed.Type: GrantFiled: January 18, 2002Date of Patent: February 8, 2005Assignee: Denso CorporationInventor: Kenichiro Takada
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Publication number: 20040263928Abstract: In a hologram screen for reproducing an image based on an output light obtained by scattering and diffusing an image light from an image projector, when a white light (image light) is projected on the hologram screen; and when a distance between two points at optional two points A and B on a surface of the hologram screen is given by 20 cm or less, and a value of the CIE 1976 chromaticity coordinate (u′, v′) at the point A is given by (u′A, v′A) and the value of the CIE 1976 chromaticity coordinate (u′, v′) at the point B is given by (u′B, v′B); the output light perpendicularly from the surface of the hologram screen has a color distribution in which a color difference &Dgr;u′v′ between two points A and B is derived from the following formula (1) and given by 0.Type: ApplicationFiled: June 15, 2004Publication date: December 30, 2004Inventors: Kenichiro Takada, Masahiro Shiozawa
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Publication number: 20040263927Abstract: In a hologram screen for reproducing an image based on an output light obtained by scattering and diffusing an image light from an image projector, when a white light (image light) is projected on the hologram screen; and when a distance between two points at optional two points A and B on a surface of the hologram screen is given by 20 cm or less, and a value of the CIE 1976 chromaticity coordinate (u′, v′) at the point A is given by (u′A, v′A) and the value of the CIE 1976 chromaticity coordinate (u′, v′) at the point B is given by (u′B, v′B); the output light perpendicularly from the surface of the hologram screen has a color distribution in which a color difference &Dgr;u′v′between two points A and B is derived from the following formula (1) and given by 0.Type: ApplicationFiled: June 15, 2004Publication date: December 30, 2004Inventor: Kenichiro Takada
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Patent number: 6829066Abstract: The present invention provides a hologram screen which is capable of preventing separation, and damage to, a hologram film and which permits the hologram film to be reused easily. The present invention relates to a hologram screen that is comprised of a hologram film having the function of diffracting the light projected from a projector, and first and second transparent members that together sandwich the hologram film from the front and back surfaces thereof so as to cover the same.Type: GrantFiled: December 6, 2001Date of Patent: December 7, 2004Assignee: Denso CorporationInventors: Kazunori Suzuki, Tooru Matsumoto, Kenichiro Takada
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Publication number: 20030202228Abstract: In a hologram screen for reproducing an image based on an output light obtained by scattering and diffusing an image light from an image projector, when a white light (image light) is projected on the hologram screen; and when a distance between two points at optional two points A and B on a surface of the hologram screen is given by 20 cm or less, and a value of the CIE 1976 chromaticity coordinate (u′, v′) at the point A is given by (u′A, v′A) and the value of the CIE 1976 chromaticity coordinate (u′, v′) at the point B is given by (u′B, v′B); the output light perpendicularly from the surface of the hologram screen has a color distribution in which a color difference &Dgr;u′v′ between two points A and B is derived from the following formula (1) and given by 0.Type: ApplicationFiled: March 31, 2003Publication date: October 30, 2003Inventors: Kenichiro Takada, Masahiro Shiozawa
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Patent number: 6597477Abstract: In a hologram screen for reproducing an image based on an output light obtained by scattering and diffusing an image light from an image projector, when a white light (image light) is projected on the hologram screen; and when a distance between two points at optional two points A and B on a surface of the hologram screen is given by 20 cm or less, and a value of the CIE 1976 chromaticity coordinate (u′, v′) at the point A is given by (u′A, v′A) and the value of the CIE 1976 chromaticity coordinate (u′, v′) at the point B is given by (u′B, v′B); the output light perpendicularly from the surface of the hologram screen has a color distribution in which a color difference &Dgr;u′v′ between two points A and B is derived from the following formula (1) and given by 0.Type: GrantFiled: March 26, 2002Date of Patent: July 22, 2003Assignee: DENSO CorporationInventors: Kenichiro Takada, Masahiro Shiozawa
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Patent number: 6590548Abstract: A display apparatus according to one aspect of the first invention includes: an irradiating unit for generating signal light which records information to be displayed; a light-transmitting type screen (or hologram screen) which transmits the signal light input by the irradiating unit to an observer; and a reflection preventing member provided to either both sides, i.e., observer's side and rear side, or any one side, of the light-transmitting type screen (or hologram screen).Type: GrantFiled: February 9, 1999Date of Patent: July 8, 2003Assignee: Denso CorporationInventors: Yasuhiro Mizutani, Tooru Matsumoto, Kenichiro Takada
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Patent number: 6542265Abstract: A method for producing a hologram recording an interference fringe formed by an object light and a reference light on a photosensitive dry plate, and the object light either having diffusing and scattering characteristics or being passed through an optical diffusion body, mainly includes the following steps: In a first step, a ratio &eegr;R0/&eegr;00 of a first diffraction efficiency &eegr;00 and a second diffraction efficiency &eegr;R0, is calculated. The diffraction efficiency &eegr;00 is dependent on two object light beams. The efficiency &eegr;R0 is dependent on the object light and the reference light. In a second step, the intensity E0 of the object light and the intensity ER of the reference light is adjusted in such a way that the ratio &eegr;R0/&eegr;00 is set to at least 10 and the efficiency &eegr;00 does not exceed 5%.Type: GrantFiled: February 20, 2002Date of Patent: April 1, 2003Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Tomoyuki Kanda, Kenichiro Takada
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Publication number: 20020159111Abstract: A hologram screen 1 for displaying an image by diffracting and scattering image light 31 projected from an image projection apparatus 2. An upward/downward light scattering device 13 for scattering light incident from at least one upward/downward specific angle range spreading obliquely upward or obliquely downward is placed on the image projection apparatus side of a hologram device 12 in the hologram screen 1, and a leftward/rightward light scattering device 14 for scattering light incident from a leftward/rightward specific angle range spreading obliquely leftward and obliquely rightward is placed between the hologram device 12 and the upward/downward light scattering device 13 or on the image projection apparatus side of the upward/downward light scattering device 13.Type: ApplicationFiled: January 4, 2002Publication date: October 31, 2002Inventors: Kazunori Suzuki, Kenichiro Takada
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Publication number: 20020154348Abstract: In a hologram screen for reproducing an image based on an output light obtained by scattering and diffusing an image light from an image projector, when a white light (image light) is projected on the hologram screen; and when a distance between two points at optional two points A and B on a surface of the hologram screen is given by 20 cm or less, and a value of the CIE 1976 chromaticity coordinate (u′, v′) at the point A is given by (u′A, v′A) and the value of the CIE 1976 chromaticity coordinate (u′, v′) at the point B is given by (u′B, v′B); the output light perpendicularly from the surface of the hologram screen has a color distribution in which a color difference &Dgr;u′v′ between two points A and B is derived from the following formula (1) and given by 0.Type: ApplicationFiled: March 26, 2002Publication date: October 24, 2002Inventors: Kenichiro Takada, Masahiro Shiozawa
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Publication number: 20020098419Abstract: A method of fabricating a hologram screen having a large visual range and a hologram imaging apparatus used for the particular method of fabricating the hologram screen are disclosed. A plurality of mirrors (3) extended toward a plurality of photosensitive members (5) are arranged at a plurality of end portions (21), respectively, of a light diffuser (2). At least a reference beam (41) and object beams (42) passed through the light diffuser (2) are radiated on a plurality of the photosensitive members (5) individually thereby to form a plurality of holograms. These holograms are integrated with each other by being arranged two-dimensionally thereby to fabricate a hologram screen. Among the mirrors (3), a reference beam-side mirror (31) arranged nearer to the light source of the reference beams (41) is extended from the light diffuser (2) by a length varied with the position of the photosensitive member (5) to be exposed.Type: ApplicationFiled: January 18, 2002Publication date: July 25, 2002Inventor: Kenichiro Takada
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Publication number: 20020097457Abstract: A method for producing a hologram recording an interference fringe formed by an object light and a reference light on a photosensitive dry plate, and the object light either having diffusing and scattering characteristics or being passed through an optical diffusion body, mainly includes the following steps: In a first step, a ratio &eegr;R0/&eegr;00 of a first diffraction efficiency &eegr;00 and a second diffraction efficiency &eegr;R0, is calculated. The diffraction efficiency &eegr;00 is dependent on two object light beams. The efficiency &eegr;R0 is dependent on the object light and the reference light. In a second step, the intensity E0 of the object light and the intensity ER of the reference light is adjusted in such a way that the ratio &eegr;R0/&eegr;00 is set to at least 10 and the efficiency &eegr;00 does not exceed 5%.Type: ApplicationFiled: February 20, 2002Publication date: July 25, 2002Inventors: Tomoyuki Kanda, Kazutoshi Koie, Katsuyoshi Nishii, Masahiro Shiozawa, Katsumi Kamiya, Atsuo Ishizuka, Kenichiro Takada