Patents by Inventor Kazuhiro Yamada

Kazuhiro Yamada 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).

  • Liquid ejection head and method of manufacturing the same
    Patent number: 10703100
    Abstract: Provided is a liquid ejection head including: a substrate; an energy-generating element, which is arranged on the substrate, and is used for ejecting a liquid; a flow path forming member, which has an ejection orifice for ejecting the liquid, and is configured to form a flow path of the liquid between the flow path forming member and the substrate; an electrode configured to generate a flow of the liquid; and a wiring, which is arranged so as to be brought into contact with the flow path forming member, and is configured to supply electric power to the electrode, in which the flow path forming member contains an organic material, and in which the electrode and the wiring are each formed of a conductive adhesive layer containing at least one of conductive diamond-like carbon or tin-doped indium oxide.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: July 7, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masafumi Morisue, Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Ryo Kasai, Tomoko Kudo, Takashi Sugawara
  • LIQUID EJECTION HEAD, LIQUID EJECTION APPARATUS, AND LIQUID SUPPLY METHOD
    Publication number: 20200207086
    Abstract: An object of the present disclosure is to densely arrange ejection orifices while suppressing decrease in liquid flow speed. A channel extending through a pressure chamber extends in a direction crossing an ejection orifice array L such that a liquid flows between the two ends of the channel located on the sides of the ejection orifice array L.
    Type: Application
    Filed: November 13, 2019
    Publication date: July 2, 2020
    Inventors: Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Toru Nakakubo, Ryo Kasai
  • LIQUID EJECTION HEAD AND LIQUID EJECTION APPARATUS
    Publication number: 20200207101
    Abstract: A liquid ejection head includes: a print element substrate including multiple ejection openings, pressure chambers, a common flow path, and pumps, the pump being configured to circulate liquid between the common flow path and the pressure chamber; and a flow path member laminated to the print element substrate. The flow path member includes a supply flow path and a collection flow path, the supply flow path being configured to supply liquid to the print element substrate, the collection flow path being configured to collect liquid that is not ejected. The supply flow path and the collection flow path have liquid connection with the same common flow path. A circulating pump generates a flow of liquid flowing in an order of the supply flow path, the common flow path, and the collection flow path, the circulating pump being provided at a position different from the print element substrate.
    Type: Application
    Filed: December 11, 2019
    Publication date: July 2, 2020
    Inventors: Kazuhiro Yamada, Yoshiyuki Nakagawa, Toru Nakakubo, Ryo Kasai, Takuro Yamazaki
  • LIQUID EJECTION HEAD, LIQUID EJECTION APPARATUS, AND LIQUID EJECTION METHOD
    Publication number: 20200198342
    Abstract: Provided are a liquid ejection head, a liquid ejection apparatus, and a liquid ejection method capable of sufficiently suppressing the thickening of a liquid in an ejection orifice. To achieve the object, a liquid ejection head comprises: a pressure chamber; a channel in which a liquid is caused to flow through the pressure chamber; an ejection orifice communicating with the pressure chamber; and an ejection energy generation element configured to eject the liquid in the pressure chamber from the ejection orifice. The ejection orifice is such that a meniscus of the liquid is formed at an end portion of the ejection orifice communicating with the pressure chamber.
    Type: Application
    Filed: December 18, 2019
    Publication date: June 25, 2020
    Inventors: Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Toru Nakakubo, Ryo Kasai
  • ELEMENT SUBSTRATE, LIQUID DISCHARGE HEAD, AND PRINTING APPARATUS
    Publication number: 20200198346
    Abstract: According to an embodiment of the present disclosure, to improve a layout efficiency of an element substrate to be integrated in a printhead and reduce a production cost of the element substrate, a driving method and a size of a first driver transistor used for driving a first heater for ink circulation and a driving method and a size of a second driver transistor used for driving a second heater for discharging ink to print are optimized, respectively. More specifically, the first driver transistor and the second driver transistor have multi-finger configurations, gate widths of the multi-finger configurations are equal to each other, and the number of fingers forming each first driver transistor is different from the number of fingers forming each second driver transistor.
    Type: Application
    Filed: December 9, 2019
    Publication date: June 25, 2020
    Inventors: Ryo Kasai, Kazuhiro Yamada, Takuro Yamazaki, Yoshiyuki Nakagawa, Toru Nakakubo
  • LIQUID EJECTION HEAD AND CONTROL METHOD OF LIQUID EJECTION HEAD
    Publication number: 20200198335
    Abstract: An object is to make it possible to stably eject a liquid from an ejection port by mitigating thickening of the liquid by evaporation from the ejection port. One embodiment of the present invention is a liquid ejection head that has: a support substrate; a liquid chamber arranged on the support substrate and provided with an energy generating element for generating energy necessary for ejection of a liquid and an ejection port from which the liquid is ejected; and a circulation flow path of the liquid that passes through the liquid chamber, and the liquid ejection head further has: a first circulating element that forms a first circulatory flow in the circulation flow path; and a second circulating element that forms a second circulatory flow inside the liquid chamber and a driving frequency of the first circulating element is lower than a driving frequency of the second circulating element.
    Type: Application
    Filed: December 19, 2019
    Publication date: June 25, 2020
    Inventors: Takuro Yamazaki, Yoshiyuki Nakagawa, Toru Nakakubo, Kazuhiro Yamada, Ryo Kasai
  • Liquid ejecting apparatus and control method
    Patent number: 10682863
    Abstract: In a configuration having a circulation flow path in association with an ejection element, a liquid ejecting apparatus is capable of circulating liquid suitably and maintaining stable ejection operation while reducing liquid vaporization, a power supply capacity, and the effect of noise. For this purpose, in a configuration in which liquid delivery mechanisms that facilitate a flow in a flow path are prepared in association with pressure chambers, the liquid delivery mechanisms are divided into a plurality of blocks and the liquid delivery mechanisms included in each of the blocks are driven at different timings.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: June 16, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuro Yamazaki, Toru Nakakubo, Kazuhiro Yamada, Yoshiyuki Nakagawa, Akiko Hammura
  • WEBBING RETRACTOR
    Publication number: 20200172046
    Abstract: A webbing retractor including: a take-up shaft that can take-up a webbing that is applied to a passenger, that takes-up the webbing by being rotated in a take-up direction, and that is rotated in a pull-out direction due to the webbing being pulled-out; a restricting member that, by being operated, restricts rotation of the take-up shaft in the pull-out direction; a driving portion that, by being electrically driven, changes an operating state of the restricting member; and a control section that acquires an acceleration of any of the webbing, the passenger or a vehicle, that computes jerk related to the acceleration, and that controls the driving portion such that the restricting member operates in a case in which the acceleration exceeds a first threshold value and the jerk exceeds a second threshold value.
    Type: Application
    Filed: November 13, 2019
    Publication date: June 4, 2020
    Inventors: Tomoya OWAKI, Takuhiro SAITO, Kazuhiro YAMADA
  • Liquid ejecting head and liquid ejecting apparatus
    Patent number: 10668736
    Abstract: A liquid ejecting head has a laminated flow path member on which a supply flow path for individually supplying a plurality of liquids to an element substrate and a collection flow path for individually collecting the liquids are formed. The supply flow path includes first and second common supply flow paths for horizontally leading first and second liquids to positions corresponding to a plurality of element substrates. The first and second common supply flow paths are formed in the same layer of the laminated flow path member. The collection flow path includes a first common collection flow path for horizontally collecting the first liquid and a second common collection flow path for horizontally collecting the second liquid from positions corresponding to the plurality of element substrates. The first and second common collection flow paths are formed in the same layer of the laminated flow path member.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: June 2, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiro Yamada, Toru Nakakubo, Yoshiyuki Nakagawa, Shingo Okushima
  • WEBBING RETRACTOR
    Publication number: 20200164833
    Abstract: A webbing retractor includes a spool, a motor, a force limiter mechanism, a first rotating body, a second rotating body, a ratchet gear, a pawl body and a control section. The ratchet gear is provided at one of the first rotating body or the second rotating body. The pawl body is provided at another of the first rotating body or the second rotating body. The pawl body can engage with the ratchet gear in a case in which the first rotating body rotates toward one side, and engagement of the pawl body with the ratchet gear being cancelled in a case in which the first rotating body rotates toward another side. The control section drives the motor to rotate in reverse, such that the first rotating body rotates toward another side in a case in which a physical amount relating to load of the passenger exceeds a predetermined value during forward rotational driving.
    Type: Application
    Filed: November 13, 2019
    Publication date: May 28, 2020
    Inventors: Tomoya OWAKI, Takuhiro SAITO, Kazuhiro YAMADA, Atsushi NISHINO
  • Liquid ejecting head and liquid ejecting apparatus
    Patent number: 10661565
    Abstract: In a circulating system which circulates liquid within a liquid ejecting head, thickening of liquid in the vicinity of an ejection port section can be more securely suppressed. The ejection port section includes a first ejection port disposed at an upstream side with respect to an ejecting direction of ink and a second ejection port disposed at a downstream side with respect to the ejecting direction. The second ejection port includes an enlarged diameter portion whose diameter is enlarged in a radially outward manner from at least a part of an opening edge portion of the first ejection port.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: May 26, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiyuki Nakagawa, Takuro Yamazaki, Kazuhiro Yamada, Toru Nakakubo
  • INTERCEPTION PROBABILITY CALCULATION SYSTEM, FLYING OBJECT AND INTERCEPTION PROBABILITY CALCULATING METHOD
    Publication number: 20200159255
    Abstract: A launched flying object continues to transmit a signal to a launching device. The launching device continues to receive the signal from the flying object, continues to calculate a probability when the flying object intercepts a target from the distance, the relative velocity and the relative angle between the flying object and the target and the flying object, and outputs a final interception probability when the communication from the flying object is stopped.
    Type: Application
    Filed: February 14, 2018
    Publication date: May 21, 2020
    Inventors: Shunsuke ARAKI, Kazuhiro YAMADA, Keisuke ANDO, Yasuhiro TOYODA
  • LIQUID EJECTION HEAD AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20200139703
    Abstract: A liquid ejection head includes a pair of electrodes disposed on a first surface of a substrate forming part of a flow path for a liquid. The pair of electrodes are adjacent to each other in a transverse direction of the electrodes, and the liquid moves in the transverse direction upon application of a voltage across the electrodes. The electrodes each include a ridge portion disposed on the first surface and an electrode wiring line connected to a power source for applying the voltage. The electrode wiring line covers an upper surface of the ridge portion and side surfaces of the ridge portion and extends from parts covering the side surfaces of the ridge portion to a downstream side and an upstream side in a direction in which the liquid moves, so as to cover the first surface.
    Type: Application
    Filed: November 1, 2019
    Publication date: May 7, 2020
    Inventors: Takashi Sugawara, Masafumi Morisue, Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Ryo Kasai, Tomoko Kudo
  • LIQUID EJECTING HEAD AND LIQUID EJECTING APPARATUS
    Publication number: 20200139708
    Abstract: The liquid ejecting head includes a first individual flow path and a second individual flow path for supplying liquid to a pressure chamber, a first common flow path for supplying liquid to the first individual flow path, and a second common flow path for supplying liquid to the second individual flow path. A first circulation for causing liquid to flow in the order of the first individual flow path, the pressure chamber, and the second individual flow path and a second circulation for causing liquid to flow in the reverse order of the first circulation are switched. A flow path resistance of the first common flow path is designed to be less than a flow path resistance of the second common flow path and a flow path resistance of the first individual flow path is designed to be less than a flow path resistance of the second individual flow path.
    Type: Application
    Filed: December 10, 2019
    Publication date: May 7, 2020
    Inventors: Yoshiyuki Nakagawa, Kazuhiro Yamada, Yohei Nakamura, Naozumi Nabeshima
  • Liquid ejection head
    Patent number: 10639888
    Abstract: A liquid ejection head including a substrate, an energy generating element which is provided on the substrate and is used for ejecting a liquid, a flow passage forming member which includes an ejection orifice, which ejects the liquid, and which forms a flow passage of the liquid between the flow passage forming member and the substrate, and an electrode which is provided on a surface of the flow passage forming member which adjoins the flow passage and which generates a flow of the liquid, in which at least a portion of the electrode is covered within the flow passage forming member.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: May 5, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masafumi Morisue, Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Ryo Kasai, Tomoko Kudo, Takashi Sugawara
  • LIQUID DISCHARGE HEAD AND LIQUID DISCHARGE APPARATUS
    Publication number: 20200108615
    Abstract: A liquid discharge head includes a discharge port; a flow passage; a discharge port part; a supply flow passage; and a recovery flow passage. The flow passage, the supply flow passage, and the recovery flow passage are configured such that the liquid inside the flow passage is capable of being circulated between the inside of the flow passage and the outside of the flow passage. An opening of the discharge port is configured such that a liquid surface of the liquid within the opening of the discharge port has a first region and that a second region, and a viscosity of the liquid in the first region is 1.2 or more times higher than a viscosity of the liquid in the second region.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 9, 2020
    Inventors: Shingo Okushima, Yoshiyuki Nakagawa, Kazuhiro Yamada, Yasuhiko Osaki, Naozumi Nabeshima
  • LIQUID EJECTION HEAD
    Publication number: 20200108605
    Abstract: A liquid ejection head includes a nozzle including an ejection port for ejecting a liquid for performing recording on a recording medium, and a pressure chamber in which an energy generating element that generates energy used for ejecting the liquid from the ejection port is disposed; and a heating unit that heats the liquid. In the liquid ejection head, the liquid in the pressure chamber is circulated to and from the outside of the pressure chamber, and an average number of preliminary ejections per nozzle during an operation period in which the recording is performed is equal to or greater than 0 and equal to or less than 20.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 9, 2020
    Inventors: Yasuhiko Osaki, Shingo Okushima, Yoshiyuki Nakagawa, Kazuhiro Yamada, Naozumi Nabeshima
  • LIQUID EJECTION HEAD AND LIQUID EJECTION APPARATUS
    Publication number: 20200108604
    Abstract: A liquid ejection head includes an ejection orifice for ejecting a liquid; a flow path in which an energy generating element is disposed, generates an energy to be used for ejecting the liquid; a liquid inside the flow path; an ejection orifice part that allows the ejection orifice and the flow path to communicate with each other; a supply flow path for supplying the liquid from the outside; and a recovery flow path for recovering the liquid to the outside. The moisture content of the liquid is 65 wt % or less. The liquid inside the flow path is circulated between the inside and the outside of the flow path.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 9, 2020
    Inventors: Yoshiyuki Nakagawa, Kazuhiro Yamada, Shingo Okushima, Yasuhiko Osaki, Naozumi Nabeshima
  • DEFECT INSPECTION APPARATUS AND DEFECT INSPECTION METHOD
    Publication number: 20200089838
    Abstract: An apparatus for inspecting a defect includes a memory storage and a processing unit coupled to the memory storage. The processing unit is configured to acquire pattern data for one or more patterns implemented on a wafer from a storage device, clip a portion that corresponds to the pattern data from a figure indicated by design data to generate design information and one or more circuit patterns, assign a first set of numbers to the one or more patterns of the pattern data, assign a second set of numbers to the one or more circuit patterns of the design information, generate relation information indicative of one or more correspondences between the first set of numbers and the second set of numbers, verify whether or not the one or more patterns indicated by the pattern data constitute a crucial defect based on the relation information, and send a verification result to a device.
    Type: Application
    Filed: February 28, 2019
    Publication date: March 19, 2020
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Kazuhiro NOJIMA, Tomohide TEZUKA, Atsushi ONISHI, Kazuhiro YAMADA, Shigeki NOJIMA, Akira HAMAGUCHI
  • Liquid ejecting module
    Patent number: 10589536
    Abstract: The present invention provides a liquid ejecting module capable of performing stable ejection operation while circulating and supplying fresh ink to the vicinity of ejection ports arranged in high density. To achieve this, a liquid ejecting module includes an element arranged face in which a plurality of ejecting elements are arranged, a circulation flow path including a supply flow path which supplies liquid to a pressure chamber and a collection flow path which collects liquid from the pressure chamber, and a liquid delivery mechanism provided in the circulation flow path for circulating liquid in the pressure chamber. The liquid delivery mechanism is located lower than the element arranged face.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: March 17, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Nakakubo, Takuro Yamazaki, Kazuhiro Yamada, Yoshiyuki Nakagawa