Patents Assigned to Kyosan Denki Co., Ltd.
  • Patent number: 10890146
    Abstract: A fuel supply apparatus includes a fuel pump, a filter element, and a passage element. The fuel pump is transversely arranged inside a fuel tank to discharge fuel sucked from a suction port. The filter element defines an inner space communicated with the suction port inside the fuel tank to filter the fuel. The passage element defines an inner passage inside the fuel tank to introduce the fuel from the inner space into the suction port through the inner passage. The suction port is located to be deviated toward one end of the filter element in a specific lateral direction. The inner passage is communicated with the inner space, and extends from the suction port toward a center of the filter element in the specific lateral direction.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: January 12, 2021
    Assignee: KYOSAN DENKI CO., LTD.
    Inventor: Masakazu Suzuki
  • Patent number: 10670161
    Abstract: A vent control valve for a fuel tank controls a ventilation between a fuel tank and an outside, and includes: an annular valve seat defined in a case; a movable valve object which is movable relative to the valve seat; a seal component having an annular plate shape and held by the movable valve object to be seated on or separated from the valve seat to open and close a passage for ventilation; and an annular ridge part defined in the movable valve object or the seal component such that the movable valve object and the seal component are in contact with each other on an annular seal line.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: June 2, 2020
    Assignee: KYOSAN DENKI CO., LTD.
    Inventors: Akinari Sugiyama, Yusuke Mukasa
  • Publication number: 20200079209
    Abstract: A vent control valve includes: a first case shaped in a tube that forms a passage for ventilation; a movable valve object arranged in the first case to open and close the passage; an inner case arranged in the first case to support the movable valve object; a second case disposed at a lower end of the first case; a first connection mechanism defined between the first case and the inner case, the first connection mechanism connecting the first case and the inner case with each other; and a second connection mechanism defined between the first case and the second case, the second connection mechanism connecting the first case and the second case with each other.
    Type: Application
    Filed: September 6, 2016
    Publication date: March 12, 2020
    Applicant: KYOSAN DENKI CO., LTD.
    Inventors: Yusuke MUKASA, Nobuharu MUTO
  • Patent number: 10578063
    Abstract: A valve element includes: a loosely insertable wall portion that is loosely inserted in an inside of a connecting portion on a downstream side of a valve seat; a fittable tubular portion that is fitted to the inside of the connecting portion on a downstream side of the loosely insertable wall portion; and a projecting annular portion-that projects from the fittable tubular portion toward a radially inner side of the fittable tubular portion. An outlet portion projects into the fittable tubular portion. A valve spring is located on a radially outer side of the outlet portion and on the radially inner side of the fittable tubular portion to urge the valve element toward the valve seat.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: March 3, 2020
    Assignees: DENSO CORPORATION, KYOSAN DENKI CO., LTD.
    Inventors: Shingo Fukuoka, Hideto Takahashi, Hiromi Sakai, Minoru Edura
  • Patent number: 10525821
    Abstract: A vent control valve for a fuel tank controls a ventilation between a fuel tank and an outside. The vent control valve includes: a case having a tube shape that forms a passage for ventilation; a movable valve object arranged in the case to be movable in an axial direction of the case to open and close the passage; and a baffle component disposed between the case and the movable valve object and located on an outer side of the movable valve object in a radial direction. An outer passage is defined between the case and the baffle component, and the baffle component restricts a contact between a fluid flowing through the outer passage and the movable valve object.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: January 7, 2020
    Assignee: KYOSAN DENKI CO., LTD.
    Inventors: Akinari Sugiyama, Yusuke Mukasa, Nobuharu Muto
  • Patent number: 10473065
    Abstract: A fuel return device includes a fuel collector and a return system. The fuel collector is located in a passage between a fuel tank and a vapor fuel processing device that processes vapor fuel discharged from the fuel tank. The fuel collector collects the fuel and stores the collected fuel as a storage fuel. The return system extends from the fuel collector, and is connected to a low-pressure generation part that generates a low pressure by a flow of fuel refueled through a filler pipe into the fuel tank, to return the storage fuel to the fuel tank.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: November 12, 2019
    Assignee: KYOSAN DENKI CO., LTD.
    Inventor: Tetsuya Takahashi
  • Patent number: 10443552
    Abstract: A fuel supply device includes a pump unit that sucks stored fuel in a fuel tank from a suction port and discharges the fuel to an outside of the fuel tank. A pressure regulating valve performs pressure regulation of fuel discharged from the pump unit. The pressure regulating valve includes a return port having an opening facing in a separating direction away from the suction port, and returns surplus fuel generated by the pressure regulation from the return port into the fuel tank. A suction filter encloses an internal space where the suction port is open, and filters the stored fuel entering the internal space. The suction filter includes an expansion part to which the internal space is extended, and the expansion part is on a side of the return port that faces in the separating direction.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: October 15, 2019
    Assignees: DENSO CORPORATION, KYOSAN DENKI CO., LTD.
    Inventors: Shingo Fukuoka, Kiyoshi Nagata, Norihiro Hayashi, Katsuhisa Yamada
  • Publication number: 20190048836
    Abstract: A conduit engaging mechanism has a first member and a second member. The first member and the second member define and form fuel passages extending over them. A seal member is disposed between the first member and the second member. The first member and the second member are firmly engaged in a radial direction by fittingly coupling an engaging section and a fitting section. The first member and the second member are engaged by an engaging mechanism in an axial direction. The fuel passages are communicated as a series of passages by engaging the first passage forming section and the second passage forming section. The first passage forming section has a flexible pipe. The flexible pipe suppresses extension and contraction of the seal member by deflection itself. Consequently, deterioration of the seal member is suppressed.
    Type: Application
    Filed: June 7, 2016
    Publication date: February 14, 2019
    Applicant: Kyosan Denki Co., Ltd.
    Inventor: Masakazu SUZUKI
  • Patent number: 10145342
    Abstract: A fuel supply device includes a fuel pump, a filter case, a fuel passage, a discharge passage, and a residual pressure holding valve. A communication port opens at a shifted position of the fuel passage that is positionally shifted from the residual pressure holding valve toward the discharge passage. The fuel passage includes an outside passage part through which fuel flows from the communication port toward the discharge passage, and an inside passage part that throttles a flow of fuel flowing from the communication port toward the residual pressure holding valve more than the outside passage part. When a passage cross-sectional area of the inside passage part is converted into a passage cross-sectional area of a circular pipe, D which is a passage diameter of the circular pipe, and L which is a length of the inside passage part satisfy a relational expression of L/D?3.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: December 4, 2018
    Assignees: DENSO CORPORATION, KYOSAN DENKI CO., LTD.
    Inventors: Hideto Takahashi, Masaharu Oohashi, Tetsuro Okazono, Hironobu Oki
  • Patent number: 10094344
    Abstract: 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: Grant
    Filed: February 9, 2016
    Date of Patent: October 9, 2018
    Assignee: Kyosan Denki Co., Ltd.
    Inventors: Akihiro Ishitoya, Akihiro Kimura
  • Patent number: 10060398
    Abstract: 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: Grant
    Filed: February 9, 2016
    Date of Patent: August 28, 2018
    Assignee: Kyosan Denki Co., Ltd.
    Inventors: Akihiro Ishitoya, Akihiro Kimura
  • Patent number: 10054088
    Abstract: 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: Grant
    Filed: November 3, 2014
    Date of Patent: August 21, 2018
    Assignees: DENSO CORPORATION, KYOSAN DENKI CO., LTD.
    Inventors: Yutaka Niwa, Hideto Takahashi, Tetsuro Okazono, Hironobu Oki, Akihiro Ishitoya, Akinari Sugiyama
  • Patent number: 10054089
    Abstract: A fuel supply device includes a sub-tank, a pump unit, a jet pump, and a connection structure connected with the pump unit and the jet pump. The connection structure has a guide part that is provided to the pump unit and guides the pressurized fuel toward the bottom in an axial direction, a pressurizing part that is provided to the jet pump and is fitted to the guide part from a side of the bottom in an axially slidable manner, to which the pressurized fuel is guided from the guide part, a shock-absorbing member that has a low spring constant that is predetermined and mitigates an axial impact between the guide part and the pressurizing part, and a sealing member that has a high spring constant higher than the low spring constant of the shock-absorbing member and radially seals a space between the guide part and the pressurizing part.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: August 21, 2018
    Assignees: DENSO CORPORATION, KYOSAN DENKI CO., LTD.
    Inventors: Hideto Takahashi, Masaharu Oohashi, Tetsuro Okazono, Hironobu Oki
  • Patent number: 10035091
    Abstract: A liquid fuel catcher has a case which defines a plurality of chambers formed as depressions in a passage so that a liquid fuel is accumulated. The case has a communicating portion which communicates the chambers in series at upper portions thereof. The case has openings at each bottom portions of the chambers. The case has a return passage which returns the liquid fuel accumulated in the chambers to a fuel tank. The liquid fuel catcher has a return valve. The return valve closes the return passage, when the liquid fuel level in the fuel tank exceeds a predetermined level. The return valve opens the return passage, when the liquid fuel level in the fuel tank is less than a predetermined level. The fuel returns to the fuel tank from the chambers through the return valve.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: July 31, 2018
    Assignee: Kyosan Denki Co., Ltd.
    Inventor: Tetsuya Takahashi
  • Patent number: 10024282
    Abstract: 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: Grant
    Filed: November 3, 2014
    Date of Patent: July 17, 2018
    Assignees: DENSO CORPORATION, KYOSAN DENKI CO., LTD.
    Inventors: Yutaka Niwa, Hideto Takahashi, Tetsuro Okazono, Hironobu Oki, Akinari Sugiyama, Akihiro Ishitoya
  • Patent number: 10024283
    Abstract: 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: Grant
    Filed: July 24, 2014
    Date of Patent: July 17, 2018
    Assignees: KYOSAN DENKI CO., LTD., DENSO CORPORATION
    Inventors: Akihiro Ishitoya, Ryosuke Takahashi, Katsuhisa Yamada
  • Patent number: 10011169
    Abstract: A casing includes a container in which a float valve is disposed. When the float valve is closed, the casing keeps the float valve in a closed state for a relatively long period of time. A sub-float valve is provided below the container in the casing, and is closed by floating on fuel at the time of a turn of a vehicle or an automatic stop of first refueling. When the first refueling is completed, air in the sub-float valve is discharged, and the sub-float valve loses its floating function.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: July 3, 2018
    Assignee: KYOSAN DENKI CO., LTD.
    Inventor: Keiji Suzuki
  • Patent number: 9926899
    Abstract: A fuel-filter abnormality detection device is used for a subject filter provided in a fuel supply device of an engine to filtrate a fuel. The fuel-filter abnormality detection device includes a first filter attachable downstream of the subject filter in fuel flow. A filtration capacity of the first filter is smaller than a filtration capacity of the subject filter, and the first filter traps a foreign matter on a downstream side of the subject filter to cause a change in fuel pressure indicating an abnormality of the subject filter. The fuel-filter abnormality detection device may include a bypass passage through which the fuel bypasses the first filter, a bypass control valve configured to allow the fuel to flow through the bypass passage when the abnormality of the subject filter is detected, and a second filter filtrating the fuel flowing through the bypass passage.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: March 27, 2018
    Assignee: KYOSAN DENKI CO., LTD.
    Inventors: Takafumi Kato, Toshiyuki Yonemoto, Katsumi Mori
  • Patent number: 9915234
    Abstract: 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: Grant
    Filed: November 3, 2014
    Date of Patent: March 13, 2018
    Assignee: KYOSAN DENKI CO., LTD.
    Inventors: Akihiro Ishitoya, Akinari Sugiyama, Yutaka Niwa
  • Patent number: 9828952
    Abstract: A control valve is disposed on a vapor control system which controls vapor. A case and caps hold a diaphragm. The case and the diaphragm define a primary chamber. The caps and the diaphragm define a secondary chamber. The secondary chamber communicates to an inlet passage via a through hole formed as an orifice. An inlet pipe is arranged so that the inlet passage and the secondary chamber are adjacent each other by being separated by an outer wall. By employing this arrangement, the through hole can be formed without increasing a vapor permeable surface area. Since the through hole is not formed on the diaphragm, a stable open-and-close characteristic can be provided. The through hole may be formed by using a molding die for forming the inlet passage. Thereby, it is possible to improve productivity.
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: November 28, 2017
    Assignee: KYOSAN DENKI CO., LTD.
    Inventor: Tetsuya Takahashi