Patents by Inventor Kazuaki Kafuku
Kazuaki Kafuku 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: 9956654Abstract: A method for manufacturing a heat exchanger includes: assembling a plurality of heat exchanger components in an assembly step; and forming a film on surfaces of the heat exchanger components using a chemical vapor deposition method in a film formation step after the assembly step. The film can restrict a formation of a through hole due to corrosion. The film can be restricted from being damaged at a delivery or assembling time, because the film formation step is provided after the assembly step. An occurrence of clogging can be restricted at a minute portion inside of the heat exchanger in the film formation step, because the film is formed using the chemical vapor deposition method.Type: GrantFiled: March 27, 2014Date of Patent: May 1, 2018Assignee: DENSO CORPORATIONInventors: Kazuaki Kafuku, Isao Kuroyanagi, Yasutoshi Yamanaka, Ryonosuke Tera, Yukihiro Sano
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Publication number: 20170327943Abstract: A coating structure includes a base made of metal, a foundation layer provided on the base, and an insulation film provided on the foundation layer. The insulation film includes a plurality of layers, each layer of the plurality of layers being different in material, the plurality of layers being layered alternately with each other. The foundation layer is provided by a method other than a coating method using a surface chemical reaction occurring on the base, and a part of the foundation layer in contact with the base is amorphous. According to this, when a foreign material adheres on the base, the foreign material can be covered by the foundation layer. Since the insulation film is provided on the foundation layer, forming defects of the insulation film caused by the foreign material can be limited.Type: ApplicationFiled: November 24, 2015Publication date: November 16, 2017Inventors: Kazuaki KAFUKU, Yukihiro SANO, Takayuki HAYASHI, Manabu TOMISAKA, Ryonosuke TERA
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Publication number: 20160039056Abstract: A method for manufacturing a heat exchanger includes: assembling a plurality of heat exchanger components in an assembly step; and forming a film on surfaces of the heat exchanger components using a chemical vapor deposition method in a film formation step after the assembly step. The film can restrict a formation of a through hole due to corrosion. The film can be restricted from being damaged at a delivery or assembling time, because the film formation step is provided after the assembly step. An occurrence of clogging can be restricted at a minute portion inside of the heat exchanger in the film formation step, because the film is formed using the chemical vapor deposition method.Type: ApplicationFiled: March 27, 2014Publication date: February 11, 2016Inventors: Kazuaki KAFUKU, Isao KUROYANAGI, Yasutoshi YAMANAKA, Ryonosuke TERA, Yukihiro SANO
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Patent number: 7931071Abstract: A heat exchanger includes an evaporation side heat pipe in which a working fluid flowing therein is heat exchanged with a high-temperature fluid to be evaporated, a condensation side heat pipe in which the working fluid flowing therein is heat exchanged with a low-temperature fluid to be condensed, and an inner fin located at least in the evaporation side heat pipe to increase a heat transmission area of the evaporation side heat pipe with the working fluid. The evaporation side heat pipe and the condensation side heat pipe are connected to form a closed cycle, and the evaporation side heat pipe is arranged such that the working fluid flows in the evaporation side heat pipe in a direction different from a horizontal direction. Furthermore, the inner fin has a bottom end that is positioned above a top surface of the working fluid at least in a liquid state.Type: GrantFiled: August 23, 2007Date of Patent: April 26, 2011Assignee: Denso CorporationInventors: Kenshirou Muramatsu, Yasutoshi Yamanaka, Masashi Miyagawa, Kazuaki Kafuku
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Publication number: 20100122800Abstract: Provided is a ferritic stainless steel for heat pipes of high-temperature exhaust heat recovery systems, which comprises, in terms of % by mass, from 16 to 32% of Cr, at most 0.03% of C, at most 0.03% of N, at most 3% of Si, at most 2% of Mn, at most 0.008% of S, from 0 to 0.3% of Al, and at least one of at most 0.7% of Nb, at most 0.3% of Ti, at most 0.5% of Zr and at most 1% of V, and optionally at least one of at most 3% of Mo, at most 3% of W, at most 3% of Cu, at most 0.1% of Y, at most 0.1% of REM (rare earth metal) and at most 0.01% of Ca, with a balance of Fe and inevitable impurities, and which satisfies at least the following formula (1), formula (2) and formula (5): Cr+3(Mo+Cu)?20??(1) Cr+3(Si+Mn+Al?Ti)?20??(2) 0.037{(C+N)/(V+Ti+0.5Nb+0.5Zr)}+0.001?0.01??(5).Type: ApplicationFiled: November 13, 2009Publication date: May 20, 2010Inventors: Yukihiro Nishida, Yoshitomo Fujimura, Manabu Oku, Yuki Mukobara, Kimio Kohara, Kazuaki Kafuku
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Publication number: 20090065184Abstract: A heat exchanger has a core and header tanks. The core includes passage units stacked in a unit sacking direction and fins. Each passage unit includes a first passage member and a second passage member connected to each other such that a second fluid passage is provided therein. The passage units are stacked such that first fluid passages are provided between bent portions of the first and second passage members of the adjacent passage units. The fins are disposed inside of the passage units and held by the bent portions of the first and second passage members. The core has core end walls constructed of at least one of first side walls of the first passage members and second side walls of the second passage members. The header tanks are disposed at ends of the core and provide tank inner spaces with the core end walls.Type: ApplicationFiled: September 4, 2008Publication date: March 12, 2009Applicant: DENSO CORPORATIONInventors: Masashi Miyagawa, Kazuaki Kafuku, Yasutoshi Yamanaka
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Publication number: 20090000285Abstract: An exhaust heat recovery device includes an evaporator disposed to evaporate a working fluid by exchanging heat between a heating fluid and the working fluid, a condenser disposed to cool and condense the working fluid by exchanging heat between a fluid to be heated and the working fluid evaporated by the evaporator, an evaporation side connection portion for guiding the working fluid evaporated by the evaporator to the condenser, and a condensation side connection portion for guiding the working fluid condensed by the condenser to the evaporator. Furthermore, at least one of the evaporation side connection portion and the condensation side connection portion has a curved portion.Type: ApplicationFiled: June 25, 2008Publication date: January 1, 2009Applicant: DENSO CORPORATIONInventors: Masashi Miyagawa, Kenshirou Muramatsu, Yasutoshi Yamanaka, Kazuaki Kafuku
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Publication number: 20080047690Abstract: A heat exchanger includes an evaporation side heat pipe in which a working fluid flowing therein is heat exchanged with a high-temperature fluid to be evaporated, a condensation side heat pipe in which the working fluid flowing therein is heat exchanged with a low-temperature fluid to be condensed, and an inner fin located at least in the evaporation side heat pipe to increase a heat transmission area of the evaporation side heat pipe with the working fluid. The evaporation side heat pipe and the condensation side heat pipe are connected to form a closed cycle, and the evaporation side heat pipe is arranged such that the working fluid flows in the evaporation side heat pipe in a direction different from a horizontal direction. Furthermore, the inner fin has a bottom end that is positioned above a top surface of the working fluid at least in a liquid state.Type: ApplicationFiled: August 23, 2007Publication date: February 28, 2008Applicant: DENSO CorporationInventors: Kenshirou Muramatsu, Yasutoshi Yamanaka, Masashi Miyagawa, Kazuaki Kafuku
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Patent number: 6869131Abstract: A carrier (1) is secured to a vehicle front end portion via a bracket (4) secured to side members (2) and a bumper reinforcement (3). The connecting portions of the carrier (1) to the bracket (4) are deviated from the side members (2) when viewed from the front side of a vehicle. The bracket (4) is provided with a reinforcing member portion (4a) to connect the left and right side members (2). Accordingly, the action of a large impact force on the carrier (1) can be prevented because only a collision force from the bumper reinforcement (3) acts on the carrier (1) and no reaction force, from the side members, acts on the carrier, when a collision occurs. Therefore, the carrier (1) can be prevented from being broken when a light collision occurs because the attaching portions of the carrier (1) are seldom broken. The rigidity of a vehicle body can be increased by the reinforcing member portion (4a), and the necessary rigidity of the carrier (1) can be reduced. Thus, the weight of the carrier (1) can be reduced.Type: GrantFiled: June 2, 2003Date of Patent: March 22, 2005Assignee: DENSO CorporationInventors: Kazuaki Kafuku, Harumi Okai
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Patent number: 6708790Abstract: A front-end structure comprising a panel body (400) to which a center member (500), being fixed to a body of a vehicle at a front end of the vehicle and supporting, at least, a driving engine (E/G), is joined, wherein the panel body (400) is molded out of aluminum by die-casting and a joining section (421) of the panel body (400) to which the center member (500) is joined has a mechanical strength higher than that of any other sections of the panel body (400) near the joining section (421) except the joining section (421).Type: GrantFiled: April 25, 2002Date of Patent: March 23, 2004Assignee: Denso CorporationInventors: Ikuo Ozawa, Toshiki Sugiyama, Norihisa Sasano, Noriaki Maeda, Kazuaki Kafuku, Harumi Okai, Yasuhiko Itou, Tomoyuki Hatano, Hiromi Takagi, Takeshi Nagasaka, Yasushi Hibi
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Publication number: 20040041439Abstract: A carrier (1) is secured to a vehicle front end portion via a bracket (4) secured to side members (2) and a bumper reinforcement (3). The connecting portions of the carrier (1) to the bracket (4) are deviated from the side members (2) when viewed from the front side of a vehicle. The bracket (4) is provided with a reinforcing member portion (4a) to connect the left and right side members (2). Accordingly, the action of a large impact force on the carrier (1) can be prevented because only a collision force from the bumper reinforcement (3) acts on the carrier (1) and no reaction force, from the side members, acts on the carrier, when a collision occurs. Therefore, the carrier (1) can be prevented from being broken when a light collision occurs because the attaching portions of the carrier (1) are seldom broken. The rigidity of a vehicle body can be increased by the reinforcing member portion (4a), and the necessary rigidity of the carrier (1) can be reduced. Thus, the weight of the carrier (1) can be reduced.Type: ApplicationFiled: June 2, 2003Publication date: March 4, 2004Inventors: Kazuaki Kafuku, Harumi Okai
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Patent number: 6676283Abstract: A vent line (440) for establishing communication between the interior of headlamps (500) and at least a blower (300) is formed integrally with a front end panel (400). The vent line (440) makes up a duct member (441) leading from each of the headlamps (500) to the blower (300). A light controller (560) is assembled by being fixed on the panel (400) in such a manner as to be located at the air inlet (442) of the duct member (441) (vent line (440)).Type: GrantFiled: June 14, 2001Date of Patent: January 13, 2004Assignee: Denso CorporationInventors: Ikuo Ozawa, Noriaki Maeda, Harumi Okai, Norihisa Sasano, Toshiki Sugiyama, Hiroaki Okuchi, Yasuhiro Itoh, Kazuaki Kafuku
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Patent number: 6660969Abstract: When a load given to the engine 100 is less than a predetermined value, the outside air suction port 104 is closed and only inside air is supplied to the engine 100, and the valve 112a is opened so as to supply warm water to the heater 112. When the load given to the engine 100 is not less than the predetermined value and the temperature of air outside the engine compartment 11 is lower than a predetermined value, the inside air suction port 102 is closed and only outside air is supplied to the engine 100, and the valve 112a is closed so that the supply of warm water to the heater 112 is stopped.Type: GrantFiled: July 24, 2002Date of Patent: December 9, 2003Assignee: Denso CorporationInventors: Ikuo Ozawa, Kazuaki Kafuku, Harumi Okai, Noriaki Maeda, Toshiki Sugiyama, Norihisa Sasano
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Publication number: 20030029852Abstract: When a load given to the engine 100 is less than a predetermined value, the outside air suction port 104 is closed and only inside air is supplied to the engine 100, and the valve 112a is opened so as to supply warm water to the heater 112. When the load given to the engine 100 is not less than the predetermined value and the temperature of air outside the engine compartment 11 is lower than a predetermined value, the inside air suction port 102 is closed and only outside air is supplied to the engine 100, and the valve 112a is closed so that the supply of warm water to the heater 112 is stopped.Type: ApplicationFiled: July 24, 2002Publication date: February 13, 2003Inventors: Ikuo Ozawa, Kazuaki Kafuku, Harumi Okai, Noriaki Maeda, Toshiki Sugiyama, Norihisa Sasano
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Patent number: 6494976Abstract: A cooling device has a radiator plate and a corrugated fin for cooling an electrical component. In a manufacturing process of the cooling device, a symmetrically constructed tool section presses the radiator plate and the fin against an anvil. The radiator plate has an attaching portion where an electrical component is attached. Knurled surface for preventing a slide is formed on the tool section only at a surrounding area to prevent a deformation of the attaching portion. The tool section and the radiator plate vibrate ultrasonically in a longitudinal direction of corrugations of the fin to prevent a crack on the fin.Type: GrantFiled: May 16, 2000Date of Patent: December 17, 2002Assignee: Denso CorporationInventors: Takayuki Hayashi, Hiroo Yamaguchi, Takaki Okochi, Takeshi Iguchi, Toshinari Sasaki, Kazuaki Kafuku
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Publication number: 20020162695Abstract: The present invention provides a front-end structure comprising a panel body (400) to which a center member (500), being fixed to a body of a vehicle at a front end of the vehicle and supporting, at least, a driving engine (E/G), is joined, wherein the panel body (400) is molded out of aluminum by die-casting and a joining section (421) of the panel body (400) to which the center member (500) is joined has a mechanical strength higher than that of any other sections of the panel body (400) near the joining section (421) except the joining section (421).Type: ApplicationFiled: April 25, 2002Publication date: November 7, 2002Inventors: Ikuo Ozawa, Toshiki Sugiyama, Norihisa Sasano, Noriaki Maeda, Kazuaki Kafuku, Harumi Okai, Yasuhiko Itou, Tomoyuki Hatano, Hiromi Takagi, Takeshi Nagasaka, Yasushi Hibi
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Publication number: 20020044455Abstract: A vent line (440) for establishing communication between the interior of head lamps (500) and at least a blower (300) is formed integrally with a front end panel (400). The vent line (440) makes up a duct member (441) leading from each of the head lamps (500) to the blower (300). A light controller (560) is assembled by being fixed on the panel (400) in such a manner as to be located at the air inlet (442) of the duct member (441) (vent line (440)).Type: ApplicationFiled: June 14, 2001Publication date: April 18, 2002Inventors: Ikuo Ozawa, Noriaki Maeda, Harumi Okai, Norihisa Sasano, Toshiki Sugiyama, Hiroaki Okuchi, Yasuhiro Itoh, Kazuaki Kafuku
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Patent number: 6328529Abstract: A blower for flowing cooling air toward a corrugated fin is disposed to face the corrugated fin. The blower is covered with a blower case. Leg portions are integrally formed with and protrude from the blower case to face the corrugated fin at both sides in a corrugated direction of the corrugated fin. The blower case is fixed to a radiation plate by elastic deformation of the leg portions. The leg portions cover the both sides in the corrugated direction of the corrugated fin, so that the corrugated fin is protected from external force.Type: GrantFiled: December 23, 1999Date of Patent: December 11, 2001Assignee: Denso CorporationInventors: Hiroo Yamaguchi, Takayuki Hayashi, Kazuaki Kafuku, Takai Okochi
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Patent number: 6135200Abstract: A square substrate is divided into four substrate areas with reference lines respectively passing through a central point of the substrate in parallel with one of diagonals of the substrate. A fin disposed between the substrate and an axial fan has plural louvers each facing one of the substrate areas and extending in a direction parallel to a corresponding reference line of the one of the substrate areas. Accordingly, when air is blown out from the axial fan toward the substrate, an air flow direction can be changed by the louvers so that the air radially flows out from the central point of the substrate. As a result, a heat spot is not produced on the substrate.Type: GrantFiled: March 9, 1999Date of Patent: October 24, 2000Assignee: Denso CorporationInventors: Takaki Okochi, Hiroo Yamaguchi, Takayuki Hayashi, Kazuaki Kafuku