Patents by Inventor Masamitsu Hayakawa
Masamitsu Hayakawa 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: 9228540Abstract: A fuel vapor processing apparatus may include a case defining therein a first adsorption chamber, a second adsorption chamber and a non-adsorption chamber communicating between the first adsorption chamber and the second adsorption chamber. The cross sectional flow area of the first adsorption chamber may be smaller than the cross sectional flow area of the second adsorption chamber.Type: GrantFiled: June 30, 2012Date of Patent: January 5, 2016Assignees: AISAN KOGYO KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norihisa Yamamoto, Tsuneyuki Kurata, Masamitsu Hayakawa, Ryuji Kosugi, Shinji Shimokawa, Yuusaku Nishimura, Shinsuke Kiyomiya, Masahide Kobayashi
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Publication number: 20130000609Abstract: A fuel vapor processing apparatus includes a case defining therein a flow passage including an adsorption chamber, an adsorption material disposed in the adsorption chamber; and a density gradient filter disposed in the flow passage at a position on an upstream side of the adsorption material with respect to a direction of flow of purge air for desorbing fuel vapor from the adsorption material. The density gradient filter includes a first portion having a first density, a second portion having a second density, and a third portion having a third density. The third portion is positioned on a downstream side of the first portion with respect to the direction of flow of the purge air and the second portion is positioned between the first portion and the third portion. Each of the first density and the third density is higher than the second density.Type: ApplicationFiled: June 30, 2012Publication date: January 3, 2013Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISAN KOGYO KABUSHIKI KAISHAInventors: Norihisa YAMAMOTO, Tsuneyuki KURATA, Masamitsu HAYAKAWA, Ryuji KOSUGI, Shinji SHIMOKAWA, Yuusaku NISHIMURA, Shinsuke KIYOMIYA, Masahide KOBAYASHI
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Publication number: 20130000610Abstract: A fuel vapor processing apparatus may include a case defining therein a first adsorption chamber, a second adsorption chamber and a non-adsorption chamber communicating between the first adsorption chamber and the second adsorption chamber. The cross sectional flow area of the first adsorption chamber may be smaller than the cross sectional flow area of the second adsorption chamber.Type: ApplicationFiled: June 30, 2012Publication date: January 3, 2013Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISAN KOGYO KABUSHIKI KAISHAInventors: Norihisa YAMAMOTO, Tsuneyuki KURATA, Masamitsu HAYAKAWA, Ryuji KOSUGI, Shinji SHIMOKAWA, Yuusaku NISHIMURA, Shinsuke KIYOMIYA, Masahide KOBAYASHI
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Patent number: 8220438Abstract: An apparatus including a canister and an accessory component associated with the canister. The canister may be filled with an adsorption material for adsorbing fuel vapor generated within a fuel tank. A communicating pipe extends downwardly from a housing of the accessory component for communication with the canister. An engaging protrusion is provided on an outer peripheral surface of the housing. An outer peripheral portion of an upper portion of the canister includes a wall portion for engagement with the engaging protrusion.Type: GrantFiled: January 31, 2012Date of Patent: July 17, 2012Assignee: Aisan Kogyo Kabushiki KaishaInventors: Yukihiro Kaneda, Tsuneyuki Kurata, Masamitsu Hayakawa, Naohito Buseki
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Publication number: 20120125200Abstract: An apparatus including a canister and an accessory component associated with the canister. The canister may be filled with an adsorption material for adsorbing fuel vapor generated within a fuel tank. A communicating pipe extends downwardly from a housing of the accessory component for communication with the canister. An engaging protrusion is provided on an outer peripheral surface of the housing. An outer peripheral portion of an upper portion of the canister includes a wall portion for engagement with the engaging protrusion.Type: ApplicationFiled: January 31, 2012Publication date: May 24, 2012Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Yukihiro KANEDA, Tsuneyuki KURATA, Masamitsu HAYAKAWA, Naohito BUSEKI
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Patent number: 8151768Abstract: One aspect according to the present disclosure includes a first coupling device and a second coupling device. The first coupling device can mechanically couple the canister and the accessory component to each other. The second coupling device can couple the canister and the accessory component to allow flow communication with each other. The second coupling device is operable in conjunction with the operation of the first coupling device.Type: GrantFiled: October 28, 2009Date of Patent: April 10, 2012Assignee: Aisan Kogyo Kabushiki KaishaInventors: Yukihiro Kaneda, Tsuneyuki Kurata, Masamitsu Hayakawa, Naohito Buseki
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Patent number: 7909919Abstract: A vaporized fuel treatment apparatus having comprising a first adsorbent having a honeycomb structure capable of adsorbing and desorbing vapor contained in fuel evaporation gas, a case configured to house the first adsorbent therein, and a holding device configured to elastically hold the first adsorbent within the case. The first adsorbent has a circumferential surface and at least one end surface intersecting with the circumferential surface at a corner portion. The holding device comprises a holding member having a first portion and a second portion configured to contact with the circumferential surface and the at least one end surface, respectively. The holding member does not contact with the corner portion of the first adsorbent. The vaporized fuel treatment apparatus can include a sealed container disposed in a canister for controlling temperature alteration in the canister.Type: GrantFiled: March 3, 2009Date of Patent: March 22, 2011Assignee: Aisan Kogyo Kabushiki KaishaInventors: Ryuji Kosugi, Kazusato Kasuya, Masamitsu Hayakawa, Shota Yamanaka
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Publication number: 20100163115Abstract: One aspect according to the present disclosure includes a first coupling device and a second coupling device. The first coupling device can mechanically couple the canister and the accessory component to each other. The second coupling device can couple the canister and the accessory component to allow flow communication with each other. The second coupling device is operable in conjunction with the operation of the first coupling device.Type: ApplicationFiled: October 28, 2009Publication date: July 1, 2010Inventors: Yukihiro Kaneda, Tsuneyuki Kurata, Masamitsu Hayakawa, Naohito Buseki
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Publication number: 20090223370Abstract: A vaporized fuel treatment apparatus having comprising a first adsorbent having a honeycomb structure capable of adsorbing and desorbing vapor contained in fuel evaporation gas, a case configured to house the first adsorbent therein, and a holding device configured to elastically hold the first adsorbent within the case. The first adsorbent has a circumferential surface and at least one end surface intersecting with the circumferential surface at a corner portion. The holding device comprises a holding member having a first portion and a second portion configured to contact with the circumferential surface and the at least one end surface, respectively. The holding member does not contact with the corner portion of the first adsorbent. The vaporized fuel treatment apparatus can include a sealed container disposed in a canister for controlling temperature alteration in the canister.Type: ApplicationFiled: March 3, 2009Publication date: September 10, 2009Applicant: Aisan Kogyo Kabushiki KaishaInventors: Ryuji Kosugi, Kazusato Kasuya, Masamitsu Hayakawa, Shota Yamanaka
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Patent number: 7363803Abstract: In a failure diagnostic system for a fuel vapor processing apparatus, a processing flow path comprising a vapor line, a canister and a purge line is closed with a vapor control valve and a purge control valve. The interior of the processing flow path is reduced in pressure or pressurized by rotating an air pump of a pump module in a forward or reverse direction. An electronic control unit (ECU) closes the vapor control valve and the purge control valve to close the processing flow path after stop of the engine and, when the fuel temperature detected by a temperature sensor is lower than a predetermined value, reduces the internal pressure of the processing flow path through an air pump, then checks air-tightness of the interior of the processing flow path based on behavior of a vapor pressure detected by a pressure sensor.Type: GrantFiled: March 6, 2006Date of Patent: April 29, 2008Assignee: Aisan Kogyo Kabushiki KaishaInventors: Masamitsu Hayakawa, Masaharu Hayakawa
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Publication number: 20060191330Abstract: In a failure diagnostic system for a fuel vapor processing apparatus, a processing flow path comprising a vapor line, a canister and a purge line is closed with a vapor control valve and a purge control valve. The interior of the processing flow path is reduced in pressure or pressurized by rotating an air pump of a pump module in a forward or reverse direction. An electronic control unit (ECU) closes the vapor control valve and the purge control valve to close the processing flow path after stop of the engine and, when the fuel temperature detected by a temperature sensor is lower than a predetermined value, reduces the internal pressure of the processing flow path through an air pump, then checks air-tightness of the interior of the processing flow path based on behavior of a vapor pressure detected by a pressure sensor.Type: ApplicationFiled: March 6, 2006Publication date: August 31, 2006Applicant: Aisan Kogyo Kabushiki KaishaInventors: Masamitsu Hayakawa, Masaharu Hayakawa
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Patent number: 7047952Abstract: A canister comprises a tank port communicated with an upper air chamber in a closed fuel tank, a purge port communicated with an intake passage of an engine, an atmospheric port opened to the atmosphere, and a main adsorbent chamber containing activated carbon, and the canister is further provided with a partition plate between the tank port and the purge port for preventing both ports from being directly communicated with each other, so as to form a first chamber between the main adsorbent chamber and the tank port, and a second chamber between the main adsorbent chamber and the purge port, and a purge buffer plate is further provided in the main adsorbent chamber between the tank port and the purge port, for communicating between the first and second chambers with each other, the first chamber serves as an air chamber containing no activated carbon while the second chamber contains activated carbon.Type: GrantFiled: October 25, 2005Date of Patent: May 23, 2006Assignees: Aisan Kogyo Kabushiki Kaisha, Toyota Jidosha Kabushiki KaishaInventors: Tokio Yamauchi, Takashi Nagai, Masamitsu Hayakawa, Yukihiko Kaneda, Yojiro Iriyama
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Publication number: 20060102156Abstract: A canister comprises a tank port communicated with an upper air chamber in a closed fuel tank, a purge port communicated with an intake passage of an engine, an atmospheric port opened to the atmosphere, and a main adsorbent chamber containing activated carbon, and the canister is further provided with a partition plate between the tank port and the purge port for preventing both ports from being directly communicated with each other, so as to form a first chamber between the main adsorbent chamber and the tank port, and a second chamber between the main adsorbent chamber and the purge port, and a purge buffer plate is further provided in the main adsorbent chamber between the tank port and the purge port, for communicating between the first and second chambers with each other, the first chamber serves as an air chamber containing no activated carbon while the second chamber contains activated carbon.Type: ApplicationFiled: October 25, 2005Publication date: May 18, 2006Applicants: AISAN KOGYO KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tokio Yamauchi, Takashi Nagai, Masamitsu Hayakawa, Yukihiko Kaneda, Yojiro Iriyama
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Patent number: 7036359Abstract: In a failure diagnostic system for a fuel vapor processing apparatus, a processing flow path comprising a vapor line, a canister and a purge line is closed with a vapor control valve and a purge control valve. The interior of the processing flow path is reduced in pressure or pressurized by rotating an air pump of a pump module in a forward or reverse direction. An electronic control unit (ECU) closes the vapor control valve and the purge control valve to close the processing flow path after stop of the engine and, when the fuel temperature detected by a temperature sensor is lower than a predetermined value, reduces the internal pressure of the processing flow path through an air pump, then checks air-tightness of the interior of the processing flow path based on behavior of a vapor pressure detected by a pressure sensor.Type: GrantFiled: July 26, 2004Date of Patent: May 2, 2006Assignee: Aisan Kogyo Kabushiki KaishaInventors: Masamitsu Hayakawa, Masaharu Hayakawa
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Publication number: 20050022588Abstract: In a failure diagnostic system for a fuel vapor processing apparatus, a processing flow path comprising a vapor line, a canister and a purge line is closed with a vapor control valve and a purge control valve. The interior of the processing flow path is reduced in pressure or pressurized by rotating an air pump of a pump module in a forward or reverse direction. An electronic control unit (ECU) closes the vapor control valve and the purge control valve to close the processing flow path after stop of the engine and, when the fuel temperature detected by a temperature sensor is lower than a predetermined value, reduces the internal pressure of the processing flow path through an air pump, then checks air-tightness of the interior of the processing flow path based on behavior of a vapor pressure detected by a pressure sensor.Type: ApplicationFiled: July 26, 2004Publication date: February 3, 2005Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Masamitsu Hayakawa, Masaharu Hayakawa