Patents by Inventor Tetsuro Okazono
Tetsuro Okazono 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: 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: 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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Patent number: 9388780Abstract: A resilient member is accommodated within a single support column, which connects a flange and a pump unit. The resilient member presses the pump unit in an axial direction toward a bottom part of a fuel tank through a holder member. The support column is formed in a polygonal tube shape and has a specific range in a part in the axial direction. A peripheral wall in the specific range is concave relative to corner parts of peripheral walls in an outside of the specific range so that a longitudinal groove having a groove bottom is provided to separate an inside and an outside of the support column. The holder member holding the pump unit is formed in a polygonal hole shape to be fitted with the peripheral walls. The holder member has a slide protrusion, which slidingly moves in the longitudinal groove in a state that the holder member is pushed into the longitudinal groove from the outside of the support column.Type: GrantFiled: April 11, 2014Date of Patent: July 12, 2016Assignee: DENSO CORPORATIONInventors: Shinobu Oikawa, Tetsuro Okazono
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Patent number: 9328704Abstract: A support shaft connects between a flange and a pump unit. An intermediate member, which connects between the support shaft and pump unit, enables a relative positional change between the support shaft and the pump unit in an axial direction of the support shaft. The intermediate member limits a relative positional change between the support shaft and the pump unit in a circumferential direction of the support shaft. A resilient member is received in the support shaft and exerts a restoring force in an axial direction of the support shaft to urge the pump unit, which is movable relative to the support shaft in the axial direction, toward a bottom portion of the fuel tank.Type: GrantFiled: December 9, 2013Date of Patent: May 3, 2016Assignees: DENSO CORPORATION, KYOSAN DENKI CO., LTD.Inventors: Tetsuro Okazono, Kouji Maruyama, Masato Inoue
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Patent number: 8992190Abstract: A reservoir is in a bottomed tubular shape and located in a fuel tank. A lid member closes an opening of the reservoir. A pump unit discharges fuel stored in the reservoir to an exterior of the fuel tank. The pump unit is supported by a holding portion of the lid member.Type: GrantFiled: September 12, 2011Date of Patent: March 31, 2015Assignees: Denso Corporation, Kyosan Denki Co., Ltd.Inventors: Tetsuro Okazono, Shinobu Oikawa, Hironobu Oki
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Publication number: 20140360602Abstract: A resilient member is accommodated within a single support column, which connects a flange and a pump unit. The resilient member presses the pump unit in an axial direction toward a bottom part of a fuel tank through a holder member. The support column is formed in a polygonal tube shape and has a specific range in a part in the axial direction. A peripheral wall in the specific range is concave relative to corner parts of peripheral walls in an outside of the specific range so that a longitudinal groove having a groove bottom is provided to separate an inside and an outside of the support column. The holder member holding the pump unit is formed in a polygonal hole shape to be fitted with the peripheral walls. The holder member has a slide protrusion, which slidingly moves in the longitudinal groove in a state that the holder member is pushed into the longitudinal groove from the outside of the support column.Type: ApplicationFiled: April 11, 2014Publication date: December 11, 2014Applicant: DENSO CORPORATIONInventors: Shinobu OIKAWA, Tetsuro OKAZONO
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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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Patent number: 8881765Abstract: A reservoir is located in a fuel tank. The reservoir is in a bottomed tubular shape having a periphery defining an opening. A lid member is located in the fuel tank and mounted to the periphery of the reservoir to close the opening. A pump unit is partially accommodated in the reservoir to discharge fuel stored in the reservoir to an exterior of the fuel tank. The pump unit is located at a position offset from a center axis of the lid member. The pump unit has a projection projected from the lid member to an exterior of the reservoir. A remaining quantity detector is configured to detect a quantity of fuel in the fuel tank. The remaining quantity detector is located at a remaining space remaining in the fuel tank. The remaining space is located on the lid member and located around the projection.Type: GrantFiled: September 12, 2011Date of Patent: November 11, 2014Assignees: Denso Corporation, Kyosan Denki Co., Ltd.Inventors: Tetsuro Okazono, Shinobu Oikawa, Hironobu Oki
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Publication number: 20140166136Abstract: A support shaft connects between a flange and a pump unit. An intermediate member, which connects between the support shaft and pump unit, enables a relative positional change between the support shaft and the pump unit in an axial direction of the support shaft. The intermediate member limits a relative positional change between the support shaft and the pump unit in a circumferential direction of the support shaft. A resilient member is received in the support shaft and exerts a restoring force in an axial direction of the support shaft to urge the pump unit, which is movable relative to the support shaft in the axial direction, toward a bottom portion of the fuel tank.Type: ApplicationFiled: December 9, 2013Publication date: June 19, 2014Applicants: KYOSAN DENKI CO., LTD., DENSO CORPORATIONInventors: Tetsuro OKAZONO, Kouji Maruyama, Masato Inoue
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Patent number: 8746277Abstract: A fuel pump has a pump chamber accommodating a rotor member. The rotor member is rotatable to supply fuel to from a tank to an exterior of the tank. A case is supported in the tank. The case accommodates a part of the fuel pump. A pump bracket is located in the tank. The pump bracket is in a tubular bottomed shape having a sidewall portion in which a remaining portion of the fuel pump is inserted such that the sidewall portion surrounds a radially outside of the pump chamber of the remaining portion. The pump bracket is joined with the case to define a gap therebetween in a radial direction of the rotor member such that the pump bracket is movable relative to the case.Type: GrantFiled: September 12, 2011Date of Patent: June 10, 2014Assignees: Denso Corporation, Kyosan Denki Co., Ltd.Inventors: Tetsuro Okazono, Hironobu Oki
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Patent number: 8689827Abstract: A support shaft connects between a flange and a pump unit. An intermediate member, which connects between the support shaft and pump unit, enables a relative positional change between the support shaft and the pump unit in an axial direction of the support shaft. The intermediate member limits a relative positional change between the support shaft and the pump unit in a circumferential direction of the support shaft. A resilient member is received in the support shaft and exerts a restoring force in an axial direction of the support shaft to urge the pump unit, which is movable relative to the support shaft in the axial direction, toward a bottom portion of the fuel tank.Type: GrantFiled: September 12, 2011Date of Patent: April 8, 2014Assignees: Denso Corporation, Kyosan Denki Co., Ltd.Inventors: Tetsuro Okazono, Shinobu Oikawa, Kiyomori Kobayashi, Norihiro Hayashi, Shinji Noda, Hiroshi Morishita, Kazuki Matsubara, Kouji Maruyama, Masato Inoue, Hironobu Oki
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Publication number: 20130233285Abstract: A filter device has a sub-tank to be provided in a fuel tank. The sub-tank has an outer tubular portion and a bottom wall. A communication hole is formed in the bottom wall. An upper-side filter element is fixed to an upper side of the bottom wall to form an upper-side filter space between them, while a lower-side filter element is fixed to a lower side of the bottom wall to form a lower-side filter space between them. An inlet port of a fuel pump is connected to the upper-side filter element. Apart of fuel can be reserved in a fuel holding portion of the inside of the sub-tank and/or in the upper-side filter space, even when fuel amount in the fuel tank is decreased and the fuel tank is inclined with respect to a horizontal line.Type: ApplicationFiled: March 5, 2013Publication date: September 12, 2013Applicant: DENSO CORPORATIONInventors: Katsuhisa YAMADA, Masaaki TANAKA, Tetsuro OKAZONO, Kazuki MATSUBARA
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Publication number: 20130230418Abstract: A fuel supply apparatus includes an electric pump, a control circuit, a lid component, and a connection component. The electric pump has a pressure raising part which raises a pressure of fuel in a fuel tank. The control circuit controls electric power supplied to the electric pump, and is arranged on the lid component. The connection component connects the lid component and the electric pump with each other, and defines a communicating path inside. A fuel outlet part of the electric pump and a circulation space of the lid component communicate with each other through the communicating path defined in the connection component.Type: ApplicationFiled: February 26, 2013Publication date: September 5, 2013Applicant: DENSO CORPORATIONInventor: Tetsuro Okazono
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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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Publication number: 20120060948Abstract: A support shaft connects between a flange and a pump unit. An intermediate member, which connects between the support shaft and pump unit, enables a relative positional change between the support shaft and the pump unit in an axial direction of the support shaft. The intermediate member limits a relative positional change between the support shaft and the pump unit in a circumferential direction of the support shaft. A resilient member is received in the support shaft and exerts a restoring force in an axial direction of the support shaft to urge the pump unit, which is movable relative to the support shaft in the axial direction, toward a bottom portion of the fuel tank.Type: ApplicationFiled: September 12, 2011Publication date: March 15, 2012Applicants: KYOSAN DENKI CO., LTD., DENSO CORPORATIONInventors: Tetsuro OKAZONO, Shinobu Oikawa, Kiyomori Kobayashi, Norihiro Hayashi, Shinji Noda, Hiroshi Morishita, Kazuki Matsubara, Kouji Maruyama, Masato Inoue, Hironobu Oki
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Publication number: 20120063938Abstract: A reservoir is in a bottomed tubular shape and located in a fuel tank. A lid member closes an opening of the reservoir. A pump unit discharges fuel stored in the reservoir to an exterior of the fuel tank. The pump unit is supported by a holding portion of the lid member.Type: ApplicationFiled: September 12, 2011Publication date: March 15, 2012Applicants: KYOSAN DENKI CO., LTD., DENSO CORPORATIONInventors: Tetsuro OKAZONO, Shinobu Oikawa, Hironobu Oki
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Publication number: 20120060949Abstract: A fuel pump has a pump chamber accommodating a rotor member. The rotor member is rotatable to supply fuel to from a tank to an exterior of the tank. A case is supported in the tank. The case accommodates a part of the fuel pump. A pump bracket is located in the tank. The pump bracket is in a tubular bottomed shape having a sidewall portion in which a remaining portion of the fuel pump is inserted such that the sidewall portion surrounds a radially outside of the pump chamber of the remaining portion. The pump bracket is joined with the case to define a gap therebetween in a radial direction of the rotor member such that the pump bracket is movable relative to the case.Type: ApplicationFiled: September 12, 2011Publication date: March 15, 2012Applicants: KYOSAN DENKI CO., LTD., DENSO CORPORATIONInventors: Tetsuro OKAZONO, Hironobu OKI
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Publication number: 20120060950Abstract: A reservoir is located in a fuel tank. The reservoir is in a bottomed tubular shape having a periphery defining an opening, A lid member is located in the fuel tank and mounted to the periphery of the reservoir to close the opening. A pump unit is partially accommodated in the reservoir to discharge fuel stored in the reservoir to an exterior of the fuel tank. The pump unit is located at a position offset from a center axis of the lid member. The pump unit has a projection projected from the lid member to an exterior of the reservoir. A remaining quantity detector is configured to detect a quantity of fuel in the fuel tank. The remaining quantity detector is located at a remaining space remaining in the fuel tank. The remaining space is located on the lid member and located around the projection.Type: ApplicationFiled: September 12, 2011Publication date: March 15, 2012Applicants: KYOSAN DENKI CO., LTD., DENSO CORPORATIONInventors: Tetsuro Okazono, Shinobu Oikawa, Hironobu Oki
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Publication number: 20110139278Abstract: A filter device is connected to a fuel pump for supplying filtered fuel to an internal combustion engine. The filter device has a bag-shaped filter element forming therein a fuel passage, wherein fuel passes through the filter element to enter into the fuel passage. The filter element further forms a vapor pooling chamber above the fuel passage, so that vapors separated from the filtered fuel in the fuel passage are moved toward the vapor pooling chamber. A valve device is provided at a portion of the filter device, which is close to the vapor pooling chamber, so that vapors are discharged from the vapor pooling chamber to an outside of the filter device.Type: ApplicationFiled: December 14, 2010Publication date: June 16, 2011Applicant: DENSO CORPORATIONInventors: Chiaki KAWAJIRI, Tetsuro OKAZONO, Katsuhisa YAMADA, Noriya MATSUMOTO, Masaaki TANAKA
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Patent number: 7305973Abstract: A fuel feed apparatus includes a lid member, a sub-tank, first and second supporting members, a biasing structure, a supporting portion, and a guide portion. The first and second supporting members are arranged in substantially radially end portions of the cylindrical portion to be substantially radially opposed to each other. The lid member is capable of axially moving relative to the sub-tank via the first and second supporting members. The biasing structure is arranged on the outer periphery of the first supporting member, and is received in the guide portion to bias the lid member and the sub-tank to be apart from each other. The first supporting member defines a groove portion that circumferentially divides an inner wall thereof into at least two planes. The first supporting member is capable of axially reciprocating through the supporting portion.Type: GrantFiled: January 13, 2005Date of Patent: December 11, 2007Assignee: Denso CorporationInventors: Tetsuro Okazono, Norihiro Hayashi