Patents by Inventor Kazuo Kawasumi
Kazuo Kawasumi 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: 9743948Abstract: A liquid ejecting apparatus includes: an inflow channel to which liquid is supplied; an outflow channel communicated with a nozzle; a liquid chamber formed with a spiral flow channel having a substantially constant cross-sectional area between the inflow channel and the outflow channel and having a given volume; a volume changing portion configured to deform the liquid chamber so as to change the volume of the liquid chamber to a volume smaller than the given volume; and an ejection control unit configured to cause the liquid to be ejected from the nozzle in a pulsed manner by driving the volume changing portion in a state in which the liquid chamber is filled with the liquid.Type: GrantFiled: June 21, 2016Date of Patent: August 29, 2017Assignee: Seiko Epson CorporationInventors: Takeshi Seto, Hirokazu Sekino, Kazuaki Uchida, Kazuo Kawasumi
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Patent number: 9657731Abstract: A micropump including a tube unit and a control unit. The control unit has a plurality of fingers. A cam sequentially presses the plurality of fingers from an inlet side to an outlet side of the tube. A drive unit gives rotation force to the cam, a control circuit unit controls operation of the drive unit, and a device frame holds the plurality of fingers, the cam, the drive unit, and the control circuit unit. A reservoir communicates with an inlet port of the tube; and a power source supplies power to the control circuit unit, wherein the tube unit is detachably attached to the control unit substantially in the horizontal direction with respect to the rotation surface of the cam and attached to the inside of a space produced by the device frame.Type: GrantFiled: June 27, 2013Date of Patent: May 23, 2017Assignee: Seiko Epson CorporationInventors: Hajime Miyazaki, Kazuo Kawasumi
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Patent number: 9631615Abstract: A micropump including a tube unit including an elastic tube disposed in an arc shape, a plurality of fingers disposed radially from the arc shape of the tube, and a guide frame, which holds the tube and the plurality of fingers. The micropump also includes a control unit including a cam that presses the plurality of fingers, a drive section that applies torque to the cam, a control circuit that carries out a drive control of the drive section, and a machine casing that holds the cam, drive section, and control circuit. The tube unit is mountable in and removable from the control unit in a direction approximately parallel to the plane of rotation of the cam, and is mounted inside a space provided in the machine casing.Type: GrantFiled: June 27, 2013Date of Patent: April 25, 2017Assignee: Seiko Epson CorporationInventors: Hajime Miyazaki, Kazuo Kawasumi
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Patent number: 9555423Abstract: A fluid injection device includes: a pulse generation section that includes a fluid chamber whose volume is changeable, and an inlet flow passage and an outlet flow passage that are connected to the fluid chamber; a first connection flow passage connected to the outlet flow passage, having an end portion; a second connection flow passage connected to the inlet flow passage; a fluid injection opening formed at the end portion of the first connection flow passage, having a diameter smaller than the diameter of the outlet flow passage; a connection flow passage tube including the first connection flow passage and having rigidity adequate to transmit pulses of fluid flowing from the fluid chamber to the fluid injection opening; and a pressure generation section that supplies fluid to the inlet flow passage.Type: GrantFiled: June 4, 2015Date of Patent: January 31, 2017Assignees: SEIKO EPSON CORPORATION, TOHOKU UNIVERSITYInventors: Takeshi Seto, Kazuo Kawasumi, Kazuyoshi Takayama, Seyed Hamid Reza Hosseini
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Publication number: 20160296248Abstract: A liquid ejecting apparatus includes: an inflow channel to which liquid is supplied; an outflow channel communicated with a nozzle; a liquid chamber formed with a spiral flow channel having a substantially constant cross-sectional area between the inflow channel and the outflow channel and having a given volume; a volume changing portion configured to deform the liquid chamber so as to change the volume of the liquid chamber to a volume smaller than the given volume; and an ejection control unit configured to cause the liquid to be ejected from the nozzle in a pulsed manner by driving the volume changing portion in a state in which the liquid chamber is filled with the liquid.Type: ApplicationFiled: June 21, 2016Publication date: October 13, 2016Inventors: Takeshi SETO, Hirokazu SEKINO, Kazuaki UCHIDA, Kazuo KAWASUMI
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Patent number: 9447783Abstract: A micropump has a tube unit including a tube and a plurality of fingers, and a control unit including a cam. The tube unit is coupled to the control unit. The control unit encases the tube unit.Type: GrantFiled: June 27, 2013Date of Patent: September 20, 2016Assignee: Seiko Epson CorporationInventors: Hajime Miyazaki, Kazuo Kawasumi
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Patent number: 9402946Abstract: A liquid ejecting apparatus includes: an inflow channel to which liquid is supplied; an outflow channel communicated with a nozzle; a liquid chamber formed with a spiral flow channel having a substantially constant cross-sectional area between the inflow channel and the outflow channel and having a given volume; a volume changing portion configured to deform the liquid chamber so as to change the volume of the liquid chamber to a volume smaller than the given volume; and an ejection control unit configured to cause the liquid to be ejected from the nozzle in a pulsed manner by driving the volume changing portion in a state in which the liquid chamber is filled with the liquid.Type: GrantFiled: November 21, 2014Date of Patent: August 2, 2016Assignee: Seiko Epson CorporationInventors: Takeshi Seto, Hirokazu Sekino, Kazuaki Uchida, Kazuo Kawasumi
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Patent number: 9316219Abstract: A fluid transporter which transports fluid by pressing a plurality of radially disposed pressing shafts against a tube held in a circular-arc shape in directions from the inside of the circular-arc shape in accordance with rotation of a rotational pressing plate having a plurality of projections on the outer circumference thereof so as to allow flow of fluid includes: a first detecting section which detects the rotation angle of the rotational pressing plate; a second detecting section which detects the rotation angle of either a driving rotor for giving a rotational force to the rotational pressing plate or a reduction transmission mechanism for connecting the driving rotor and the rotational pressing plate; a data table which shows the relationship between the rotation angle of the rotational pressing plate and a cumulative delivery amount; and a controller which controls the drive of the driving rotor.Type: GrantFiled: October 18, 2013Date of Patent: April 19, 2016Assignee: Seiko Epson CorporationInventors: Hajime Miyazaki, Kazuo Kawasumi
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Patent number: 9309880Abstract: A fluid transporting device includes an elastic tube, a tube frame that holds the elastic tube in an arc, a rotary push plate arranged in the arc for facilitating fluid flow inside the elastic tube, and a plurality of push pins disposed between the elastic tube and the center of the arc. Each push pin includes a semispherical end portion that contacts the rotary push plate, a pushing end portion that places a bias on the elastic tube, and adjacent end portions of at least two push pins close the elastic tube when the semispherical end portions are pushed by an outer circumference arc of the rotary push plate.Type: GrantFiled: December 19, 2013Date of Patent: April 12, 2016Assignee: Seiko Epson CorporationInventors: Hajime Miyazaki, Kazuo Kawasumi, Kenichi Ushikoshi
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Patent number: 9228580Abstract: A fluid transporter which transports fluid by pressing a plurality of radially disposed pressing shafts against a tube held in a circular-arc shape in directions from the inside of the circular-arc shape in accordance with rotation of a rotational pressing plate having a plurality of projections on the outer circumference thereof so as to allow flow of fluid includes: a first detecting section which detects the rotation angle of the rotational pressing plate; a second detecting section which detects the rotation angle of either a driving rotor for giving a rotational force to the rotational pressing plate or a reduction transmission mechanism for connecting the driving rotor and the rotational pressing plate; a data table which shows the relationship between the rotation angle of the rotational pressing plate and a cumulative delivery amount; and a controller which controls the drive of the driving rotor.Type: GrantFiled: October 18, 2013Date of Patent: January 5, 2016Assignee: Seiko Epson CorporationInventors: Hajime Miyazaki, Kazuo Kawasumi
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Publication number: 20150266035Abstract: A fluid injection device includes: a pulse generation section that includes a fluid chamber whose volume is changeable, and an inlet flow passage and an outlet flow passage that are connected to the fluid chamber; a first connection flow passage connected to the outlet flow passage, having an end portion; a second connection flow passage connected to the inlet flow passage; a fluid injection opening formed at the end portion of the first connection flow passage, having a diameter smaller than the diameter of the outlet flow passage; a connection flow passage tube including the first connection flow passage and having rigidity adequate to transmit pulses of fluid flowing from the fluid chamber to the fluid injection opening; and a pressure generation section that supplies fluid to the inlet flow passage.Type: ApplicationFiled: June 4, 2015Publication date: September 24, 2015Inventors: Takeshi SETO, Kazuo KAWASUMI, Kazuyoshi TAKAYAMA, Seyed Hamid Reza HOSSEINI
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Patent number: 9140252Abstract: A fluid transporter includes: a rotor; a fluid delivery channel which has a groove having a circular-arc shape around a rotation axis of the rotor and disposed on a surface of a channel frame opposed to the rotor, and a sheet-shaped elastic member sealing an opening of the groove; and a plurality of pressing members disposed between the rotor and the elastic member to sequentially and repeatedly open and close the delivery channel from the upstream side to the downstream side by deforming the elastic member in accordance with the rotation of the rotor.Type: GrantFiled: June 8, 2011Date of Patent: September 22, 2015Assignee: Seiko Epson CorporationInventors: Hajime Miyazaki, Kazuo Kawasumi
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Patent number: 9073069Abstract: A fluid injection device includes: a pulse generation section that includes a fluid chamber whose volume is changeable, and an inlet flow passage and an outlet flow passage that are connected to the fluid chamber; a first connection flow passage connected to the outlet flow passage, having an end portion; a second connection flow passage connected to the inlet flow passage; a fluid injection opening formed at the end portion of the first connection flow passage, having a diameter smaller than the diameter of the outlet flow passage; a connection flow passage tube including the first connection flow passage and having rigidity adequate to transmit pulses of fluid flowing from the fluid chamber to the fluid injection opening; and a pressure generation section that supplies fluid to the inlet flow passage.Type: GrantFiled: February 14, 2014Date of Patent: July 7, 2015Assignees: SEIKO EPSON CORPORATION, TOHOKU UNIVERSITYInventors: Takeshi Seto, Kazuo Kawasumi, Kazuyoshi Takayama, Seyed Hamid Reza Hosseini
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Publication number: 20150164529Abstract: A fluid ejection device includes: a fluid chamber whose capacity is variable; an inlet flow path and an outlet flow path communicating with the fluid chamber; a capacity changing unit which changes the capacity of the fluid chamber; a fluid supplying unit which supplies fluid to the inlet flow path; a fluid ejection opening disposed at an end of the outlet flow path opposite to an end communicating with the fluid chamber; a vibrating unit which vibrates a component in the vicinity of the fluid ejection opening; a vibration detecting unit which detects the level of vibration of the component in the vicinity of the fluid ejection opening; and an operation control unit which controls operation of the capacity changing unit based on the level of the vibration detected by the vibration detecting unit.Type: ApplicationFiled: February 27, 2015Publication date: June 18, 2015Inventors: Takeshi SETO, Kazuo KAWASUMI, Yasuyoshi HAMA, Hideki KOJIMA, Yasuhiro ONO
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Patent number: 8998938Abstract: A fluid ejection device includes: a fluid chamber whose capacity is variable; an inlet flow path and an outlet flow path communicating with the fluid chamber; a capacity changing unit which changes the capacity of the fluid chamber; a fluid supplying unit which supplies fluid to the inlet flow path; a fluid ejection opening disposed at an end of the outlet flow path opposite to an end communicating with the fluid chamber; a vibrating unit which vibrates a component in the vicinity of the fluid ejection opening; a vibration detecting unit which detects the level of vibration of the component in the vicinity of the fluid ejection opening; and an operation control unit which controls operation of the capacity changing unit based on the level of the vibration detected by the vibration detecting unit.Type: GrantFiled: September 28, 2009Date of Patent: April 7, 2015Assignee: Seiko Epson CorporationInventors: Takeshi Seto, Kazuo Kawasumi, Yasuyoshi Hama, Hideki Kojima, Yasuhiro Ono
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Publication number: 20150075367Abstract: A liquid ejecting apparatus includes: an inflow channel to which liquid is supplied; an outflow channel communicated with a nozzle; a liquid chamber formed with a spiral flow channel having a substantially constant cross-sectional area between the inflow channel and the outflow channel and having a given volume; a volume changing portion configured to deform the liquid chamber so as to change the volume of the liquid chamber to a volume smaller than the given volume; and an ejection control unit configured to cause the liquid to be ejected from the nozzle in a pulsed manner by driving the volume changing portion in a state in which the liquid chamber is filled with the liquid.Type: ApplicationFiled: November 21, 2014Publication date: March 19, 2015Inventors: Takeshi SETO, Hirokazu SEKINO, Kazuaki UCHIDA, Kazuo KAWASUMI
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Patent number: 8926297Abstract: A fluid transporter which transports fluid by pressing a plurality of radially disposed pressing shafts against a tube held in a circular-arc shape in directions from the inside of the circular-arc shape in accordance with rotation of a rotational pressing plate having a plurality of projections on the outer circumference thereof so as to allow flow of fluid includes: a first detecting section which detects the rotation angle of the rotational pressing plate; a second detecting section which detects the rotation angle of either a driving rotor for giving a rotational force to the rotational pressing plate or a reduction transmission mechanism for connecting the driving rotor and the rotational pressing plate; a data table which shows the relationship between the rotation angle of the rotational pressing plate and a cumulative delivery amount; and a controller which controls the drive of the driving rotor.Type: GrantFiled: July 7, 2011Date of Patent: January 6, 2015Assignee: Seiko Epson CorporationInventors: Hajime Miyazaki, Kazuo Kawasumi
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Patent number: 8919664Abstract: A liquid ejecting apparatus includes: an inflow channel to which liquid is supplied; an outflow channel communicated with a nozzle; a liquid chamber formed with a spiral flow channel having a substantially constant cross-sectional area between the inflow channel and the outflow channel and having a given volume; a volume changing portion configured to deform the liquid chamber so as to change the volume of the liquid chamber to a volume smaller than the given volume; and an ejection control unit configured to cause the liquid to be ejected from the nozzle in a pulsed manner by driving the volume changing portion in a state in which the liquid chamber is filled with the liquid.Type: GrantFiled: January 17, 2012Date of Patent: December 30, 2014Assignee: Seiko Epson CorporationInventors: Takeshi Seto, Hirokazu Sekino, Kazuaki Uchida, Kazuo Kawasumi
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Patent number: 8888473Abstract: A fluid transporting device includes an elastic tube, a tube frame that holds the elastic tube in an arc, a rotary push plate arranged in the arc for facilitating fluid flow inside the elastic tube, and a plurality of push pins disposed between the elastic tube and the center of the arc. Each push pin includes a semispherical end portion that contacts the rotary push plate, a pushing end portion that places a bias on the elastic tube, and adjacent end portions of at least two push pins close the elastic tube when the semispherical end portions are pushed by an outer circumference arc of the rotary push plate.Type: GrantFiled: December 19, 2013Date of Patent: November 18, 2014Assignee: Seiko Epson CorporationInventors: Hajime Miyazaki, Kazuo Kawasumi, Kenichi Ushikoshi
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Patent number: 8858201Abstract: A fluid transporting device includes an elastic tube, a tube frame that holds the elastic tube in an arc, a rotary push plate arranged in the arc for facilitating fluid flow inside the elastic tube, and a plurality of push pins disposed between the elastic tube and the center of the arc. Each push pin includes a semispherical end portion that contacts the rotary push plate, a pushing end portion that places a bias on the elastic tube, and adjacent end portions of at least two push pins close the elastic tube when the semispherical end portions are pushed by an outer circumference arc of the rotary push plate.Type: GrantFiled: May 9, 2013Date of Patent: October 14, 2014Assignee: Seiko Epson CorporationInventors: Hajime Miyazaki, Kazuo Kawasumi, Kenichi Ushikoshi