Patents by Inventor Akihiro Ishitoya
Akihiro Ishitoya 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: 10094344Abstract: A fuel supply device has a module installed in a fuel tank. The module has a cap and a support pillar arranged between the cap and a bottom of the fuel tank. The support pillar supports a suction filter and a level sensor to use the bottom of the fuel tank as a base point for defining proper positions. The cap supports a valve relevant to ventilation of the fuel tank. The valve is supported by a base portion. The valve is positioned in the support pillar. The valve and the support pillar are arranged to overlap each other along the height direction. Various components are arranged in the small cap.Type: GrantFiled: February 9, 2016Date of Patent: October 9, 2018Assignee: Kyosan Denki Co., Ltd.Inventors: Akihiro Ishitoya, Akihiro Kimura
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Patent number: 10060398Abstract: A fuel supply device has a module installed in a fuel tank. The module has a cap and a support pillar arranged between the cap and a bottom of the fuel tank. The support pillar supports a suction filter and a level sensor to use the bottom of the fuel tank as a base point for defining proper positions. The cap supports a valve relevant to ventilation of the fuel tank. The valve is supported by a base portion. The valve is positioned in the support pillar. The valve and the support pillar are arranged to overlap each other along the height direction. Various components are arranged in the small cap.Type: GrantFiled: February 9, 2016Date of Patent: August 28, 2018Assignee: Kyosan Denki Co., Ltd.Inventors: Akihiro Ishitoya, Akihiro Kimura
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Patent number: 10054088Abstract: A fuel supply device includes a fuel pump, a filter case that houses a fuel filter, and a port member joined to the filter case, a fuel pumped by the fuel pump from inside a fuel tank is filtered by the fuel filter and supplied from inside the filter case toward an internal combustion engine, and the port member integrally includes a plurality of fuel ports that communicate from inside of the filter case to outside of the filter case.Type: GrantFiled: November 3, 2014Date of Patent: August 21, 2018Assignees: DENSO CORPORATION, KYOSAN DENKI CO., LTD.Inventors: Yutaka Niwa, Hideto Takahashi, Tetsuro Okazono, Hironobu Oki, Akihiro Ishitoya, Akinari Sugiyama
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Patent number: 10024282Abstract: A fuel supply device includes a fuel pump and a filter case that houses a fuel filter, a fuel pumped by the fuel pump from inside a fuel tank is filtered by the fuel filter and supplied from inside the filter case toward an internal combustion engine, and the filter case includes a case body having a closed bottom shape that forms a housing chamber of the fuel filter, a case cap that covers an aperture of the case body by being joined to the case body, and a residual pressure retention valve that, when the fuel pump is stopped, retains a pressure of the fuel supplied from inside the filter case toward the internal combustion engine, the residual pressure retention valve being disposed at a joint boundary of the case body and the case cap.Type: GrantFiled: November 3, 2014Date of Patent: July 17, 2018Assignees: DENSO CORPORATION, KYOSAN DENKI CO., LTD.Inventors: Yutaka Niwa, Hideto Takahashi, Tetsuro Okazono, Hironobu Oki, Akinari Sugiyama, Akihiro Ishitoya
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Patent number: 10024283Abstract: A suction filter includes: a casing having an intake port through which fuel is drawn; a filtration member to filter the fuel to be drawn into the intake port; and a wall component which defines a fuel passage for fuel which passes the filtration member toward the intake port. At least a part of the filtration member is located higher than the intake port. The wall component has an upper end positioned higher than the intake port, and the fuel passage is defined so that the fuel flowing through the fuel passage flows over the upper end.Type: GrantFiled: July 24, 2014Date of Patent: July 17, 2018Assignees: KYOSAN DENKI CO., LTD., DENSO CORPORATIONInventors: Akihiro Ishitoya, Ryosuke Takahashi, Katsuhisa Yamada
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Patent number: 9915234Abstract: A valve structure includes a retention element, a first valve body, and a second valve body. The retention element is mounted to and is retained in a lower portion of a stored object. The stored object includes a pump device that pumps fuel from the fuel tank into the sub tank through a pumping passage that communicates an inside of the sub tank with an outside of the sub tank. The stored object is inserted from an upper portion of the sub tank and housed inside the sub tank. The first valve body is integrally formed with the retention element and extends from the retention element. The first valve body is located at a natural inlet open on the bottom portion of the sub tank. The second valve body is integrally formed with the retention element and extends from the retention element. The second valve body is located on the pumping passage.Type: GrantFiled: November 3, 2014Date of Patent: March 13, 2018Assignee: KYOSAN DENKI CO., LTD.Inventors: Akihiro Ishitoya, Akinari Sugiyama, Yutaka Niwa
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Patent number: 9803594Abstract: The fuel supply device has a module installed in a fuel tank. The module has a cap and a support pillar arranged between the cap and a bottom of the fuel tank. The cap is supporting a valve relevant to ventilation of the fuel tank. The valve is supported by a base portion. The base portion and a large diameter part are connected by snap-fit mechanisms. The valve and the base portion are connected by snap-fit mechanisms. A hook part is arranged in an engaging window. It is possible to inspect the valve through the engaging window.Type: GrantFiled: February 9, 2016Date of Patent: October 31, 2017Assignee: Kyosan Denki Co., Ltd.Inventors: Akihiro Ishitoya, Akihiro Kimura, Akinari Sugiyama
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Publication number: 20160265494Abstract: A fuel supply device includes a fuel pump and a filter case that houses a fuel filter, a fuel pumped by the fuel pump from inside a fuel tank is filtered by the fuel filter and supplied from inside the filter case toward an internal combustion engine, and the filter case integrally includes, offset to a specific location of a circumferential direction, a fuel passage that allows fuel to flow downstream from the fuel filter, a discharge passage that discharges flowing fuel in the fuel passage toward the internal combustion engine, and a plurality of opening and closing valves that open and close the fuel passage.Type: ApplicationFiled: November 3, 2014Publication date: September 15, 2016Applicant: DENSO CORPORATIONInventors: Yutaka NIWA, Hideto TAKAHASHI, Tetsuro OKAZONO, Hironobu OKI, Akinari SUGIYAMA, Akihiro ISHITOYA
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Publication number: 20160252059Abstract: A fuel supply device includes a fuel pump and a filter case that houses a fuel filter, fuel pumped by the fuel pump from inside a fuel tank is filtered by the fuel filter and supplied from inside the filter case toward an internal combustion engine, and the filter case includes a fuel passage formed downstream of the fuel filter, the fuel passage being in communication with outside of the filter case, and a partition wall that partitions the fuel passage to give the fuel passage a shape which is turned back in an axial direction of the filter case.Type: ApplicationFiled: November 3, 2014Publication date: September 1, 2016Inventors: Yutaka NIWA, Hideto TAKAHASHI, Tetsuro OKAZONO, Hironobu OKI, Akinari SUGIYAMA, Akihiro ISHITOYA
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Publication number: 20160252060Abstract: A fuel supply device includes a fuel pump, a filter case that houses a fuel filter, and a port member joined to the filter case, a fuel pumped by the fuel pump from inside a fuel tank is filtered by the fuel filter and supplied from inside the filter case toward an internal combustion engine, and the port member integrally includes a plurality of fuel ports that communicate from inside of the filter case to outside of the filter case.Type: ApplicationFiled: November 3, 2014Publication date: September 1, 2016Applicants: DENSO CORPORATION, KYOSAN DENKI COL, LTD.Inventors: Yutaka NIWA, Hideto TAKAHASHI, Tetsuro OKAZONO, Hironobu OKI, Akihiro ISHITOYA, Akinari SUGIYAMA
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Publication number: 20160245246Abstract: A fuel supply device includes a fuel pump and a filter case that houses a fuel filter, a fuel pumped by the fuel pump from inside a fuel tank is filtered by the fuel filter and supplied from inside the filter case toward an internal combustion engine, and the filter case includes a case body having a closed bottom shape that forms a housing chamber of the fuel filter, a case cap that covers an aperture of the case body by being joined to the case body, and a residual pressure retention valve that, when the fuel pump is stopped, retains a pressure of the fuel supplied from inside the filter case toward the internal combustion engine, the residual pressure retention valve being disposed at a joint boundary of the case body and the case cap.Type: ApplicationFiled: November 3, 2014Publication date: August 25, 2016Inventors: Yutaka NIWA, Hideto TAKAHASHI, Tetsuro OKAZONO, Hironobu OKI, Akinari SUGIYAMA, Akihiro ISHITOYA
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Publication number: 20160236566Abstract: A fuel supply device has a module installed in a fuel tank. The module has a cap and a support pillar arranged between the cap and a bottom of the fuel tank. The support pillar supports a suction filter and a level sensor to use the bottom of the fuel tank as a base point for defining proper positions. The cap supports a valve relevant to ventilation of the fuel tank. The valve is supported by a base portion. The valve is positioned in the support pillar. The valve and the support pillar are arranged to overlap each other along the height direction. Various components are arranged in the small cap.Type: ApplicationFiled: February 9, 2016Publication date: August 18, 2016Inventors: Akihiro ISHITOYA, Akihiro KIMURA
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Publication number: 20160238172Abstract: The fuel supply device has a module installed in a fuel tank. The module has a cap and a support pillar arranged between the cap and a bottom of the fuel tank. The cap is supporting a valve relevant to ventilation of the fuel tank. The valve is supported by a base portion. The base portion and a large diameter part are connected by snap-fit mechanisms. The valve and the base portion are connected by snap-fit mechanisms. A hook part is arranged in an engaging window. It is possible to inspect the valve through the engaging window.Type: ApplicationFiled: February 9, 2016Publication date: August 18, 2016Inventors: Akihiro ISHITOYA, Akihiro KIMURA, Akinari SUGIYAMA
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Publication number: 20150224873Abstract: A valve structure includes a retention element, a first valve body, and a second valve body. The retention element is mounted to and is retained in a lower portion of a stored object. The stored object includes a pump device that pumps fuel from the fuel tank into the sub tank through a pumping passage that communicates an inside of the sub tank with an outside of the sub tank. The stored object is inserted from an upper portion of the sub tank and housed inside the sub tank. The first valve body is integrally formed with the retention element and extends from the retention element. The first valve body is located at a natural inlet open on the bottom portion of the sub tank. The second valve body is integrally formed with the retention element and extends from the retention element. The second valve body is located on the pumping passage.Type: ApplicationFiled: November 3, 2014Publication date: August 13, 2015Inventors: Akihiro ISHITOYA, Akinari SUGIYAMA, Yutaka NIWA
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Publication number: 20150060349Abstract: A suction filter includes: a casing having an intake port through which fuel is drawn; a filtration object to filter the fuel to be drawn into the intake port; and a wall component which defines a fuel passage for fuel which passes the filtration object toward the intake port. At least a part of the filtration object is located upper than the intake port. The wall component has an upper end positioned upper than the intake port, and the fuel passage is defined so that the fuel flowing through the fuel passage flows over the upper end.Type: ApplicationFiled: July 24, 2014Publication date: March 5, 2015Inventors: Akihiro ISHITOYA, Ryosuke TAKAHASHI, Katsuhisa YAMADA
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Patent number: 8893686Abstract: A pump unit having a fuel pump and a suction filter is provided in a sub tank of a fuel tank. A filter element sheet for the suction filter is formed in a cup shape, a bottom wall portion of which faces to an inner bottom surface of the sub tank. A suction port of the fuel pump is opened to a fuel passage formed in the inside of the suction filter, so that filtered fuel is sucked into the fuel pump. Multiple mountain fold portions and multiple valley fold portions are formed on a side wall of the cup-shaped filter element sheet, to thereby increase surface area for filtering the fuel.Type: GrantFiled: March 21, 2012Date of Patent: November 25, 2014Assignees: Denso Corporation, Kyosan Denki Co., Ltd.Inventors: Katsuhisa Yamada, Tetsuro Okazono, Hironobu Oki, Akihiro Ishitoya, Tomohito Ishihara
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Publication number: 20120240901Abstract: A pump unit having a fuel pump and a suction filter is provided in a sub tank of a fuel tank. A filter element sheet for the suction filter is formed in a cup shape, a bottom wall portion of which faces to an inner bottom surface of the sub tank. A suction port of the fuel pump is opened to a fuel passage formed in the inside of the suction filter, so that filtered fuel is sucked into the fuel pump. Multiple mountain fold portions and multiple valley fold portions are formed on a side wall of the cup-shaped filter element sheet, to thereby increase surface area for filtering the fuel.Type: ApplicationFiled: March 21, 2012Publication date: September 27, 2012Applicants: KYOSAN DENKI CO., LTD., DENSO CORPORATIONInventors: Katsuhisa YAMADA, Tetsuro Okazono, Hironobu Oki, Akihiro Ishitoya, Tomohito Ishihara
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Patent number: 6776182Abstract: A stop valve which is fitted with a cylindrical supporting portion is comprised of a ring-shaped rigid axial portion, a ring-shaped platy bendable valve portion extending outward, and a sealing lip portion extending inward. The sealing lip portion has a first sealing lip which extends obliquely upward from the rigid axial portion and has a semi-circular seal effecting face provided at an edge thereof, and a second sealing lip which extends obliquely downward from the rigid axial portion and has a semi-circular seal effecting face provided at an edge thereof. The first and second sealing lips have an extending portion which connects the edge seal effecting face with the rigid axial portion and has substantially a same thickness as a diameter of the semi-circular shape.Type: GrantFiled: October 28, 2002Date of Patent: August 17, 2004Assignee: Kyosan Denki Co., Ltd.Inventors: Akihiro Ishitoya, Takashi Fujimaki, Kimiyasu Kimura, Kenichi Ito
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Publication number: 20030079776Abstract: A stop valve which is fitted with a cylindrical supporting portion is comprised of a ring-shaped rigid axial portion, a ring-shaped platy bendable valve portion extending outward, and a sealing lip portion extending inward. The sealing lip portion has a first sealing lip which extends obliquely upward from the rigid axial portion and has a semi-circular seal effecting face provided at an edge thereof, and a second sealing lip which extends obliquely downward from the rigid axial portion and has a semi-circular seal effecting face provided at an edge thereof. The first and second sealing lips have an extending portion which connects the edge seal effecting face with the rigid axial portion and has substantially a same thickness as a diameter of the semi-circular shape.Type: ApplicationFiled: October 28, 2002Publication date: May 1, 2003Applicant: Kyosan Denki Co., Ltd.Inventors: Akihiro Ishitoya, Takashi Fujimaki, Kimiyasu Kimura, Kenichi Ito