Patents by Inventor Isao TAKAGISHI

Isao TAKAGISHI 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).

  • Patent number: 11441491
    Abstract: Provided is a fuel injection device for engines, configured using a technique which can extend service life while good responsiveness is maintained. This fuel injection device for engines is provided with: a control rack supported so as to be slidable in an axial direction and configured so that the amount of fuel delivered under pressure by a fuel pumping mechanism can be adjusted by changing the sliding position of the control rack in the axial direction; an actuator which can move forward and backward an operation section; and a link lever which is supported in a rockable manner by a support shaft and which rocks as the operation section of the actuator moves forward and backward, thereby sliding the control rack. The fuel injection device for engines is further provided with an actuator-side connection section for connecting the operation section of the actuator to the link lever. The actuator-side connection section is disposed coaxially with the operation section of the actuator.
    Type: Grant
    Filed: April 26, 2021
    Date of Patent: September 13, 2022
    Assignee: Yanmar Co., Ltd.
    Inventors: Isao Takagishi, Masaki Nanko, Ryota Iwano, Hiroyuki Machiyama, Kenichi Nakaguchi, Yusei Fukuda
  • Publication number: 20210239055
    Abstract: Provided is a fuel injection device for engines, configured using a technique which can extend service life while good responsiveness is maintained. This fuel injection device for engines is provided with: a control rack supported so as to be slidable in an axial direction and configured so that the amount of fuel delivered under pressure by a fuel pumping mechanism can be adjusted by changing the sliding position of the control rack in the axial direction; an actuator which can move forward and backward an operation section; and a link lever which is supported in a rockable manner by a support shaft and which rocks as the operation section of the actuator moves forward and backward, thereby sliding the control rack . The fuel injection device for engines is further provided with an actuator-side connection section for connecting the operation section of the actuator to the link lever. The actuator-side connection section is disposed coaxially with the operation section of the actuator.
    Type: Application
    Filed: April 26, 2021
    Publication date: August 5, 2021
    Applicant: Yanmar Co., Ltd.
    Inventors: Isao Takagishi, Masaki Nanko, Ryota Iwano, Hiroyuki Machiyama, Kenichi Nakaguchi, Yusei Fukuda
  • Patent number: 11041448
    Abstract: A technology that can extend the life of a fuel injection device of an engine while maintaining its good responsiveness is provided. A fuel injection device 100 for an engine includes: a control rack 55 supported to be slidable in an axial direction and capable of adjusting of a fuel pressure-feed amount of a fuel pressure-feed mechanism unit 51, based on its slide-position relative to the axial direction; an actuator 40 capable of reciprocating its operating unit 41; and a link lever 20 swingably supported by a pivot shaft member 25 and configured to swing in association with reciprocation of the operating unit 41 of the actuator 40 thereby causing the control rack 55 to slide, wherein the fuel injection device includes an actuator-side connecting part 20A connecting an operating unit 41 of the actuator 40 to the link lever 20, and the actuator-side connecting part 20A is positioned on the same axis as the operating unit 41 of the actuator 40.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: June 22, 2021
    Assignee: Yanmar Power Technology Co., Ltd.
    Inventors: Isao Takagishi, Masaki Nanko, Ryota Iwano, Hiroyuki Machiyama, Kenichi Nakaguchi, Yusei Fukuda
  • Publication number: 20200284208
    Abstract: A technology that can extend the life of a fuel injection device of an engine while maintaining its good responsiveness is provided. A fuel injection device 100 for an engine includes: a control rack 55 supported to be slidable in an axial direction and capable of adjusting of a fuel pressure-feed amount of a fuel pressure-feed mechanism unit 51, based on its slide-position relative to the axial direction; an actuator 40 capable of reciprocating its operating unit 41; and a link lever 20 swingably supported by a pivot shaft member 25 and configured to swing in association with reciprocation of the operating unit 41 of the actuator 40 thereby causing the control rack 55 to slide, wherein the fuel injection device includes an actuator-side connecting part 20A connecting an operating unit 41 of the actuator 40 to the link lever 20, and the actuator-side connecting part 20A is positioned on the same axis as the operating unit 41 of the actuator 40.
    Type: Application
    Filed: August 8, 2018
    Publication date: September 10, 2020
    Applicant: Yanmar Co., Ltd.
    Inventors: Isao Takagishi, Masaki Nanko, Ryota Iwano, Hiroyuki Machiyama, Kenichi Nakaguchi, Yusei Fukuda
  • Patent number: 10443554
    Abstract: A fuel injection pump includes a plunger, a plunger barrel which supports the plunger, a body which houses the plunger and the plunger barrel, a plate which covers an opening formed on the body, a control lever turnably attached near the plate, and an adjuster bolt which abuts against the control lever to restrict turn of the control lever and is supported by a stay disposed on the plate.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: October 15, 2019
    Assignee: YANMAR CO., LTD.
    Inventors: Masaki Nankou, Ryota Iwano, Isao Takagishi
  • Publication number: 20160237967
    Abstract: A fuel injection pump includes a plunger, a plunger barrel which supports the plunger, a body which houses the plunger and the plunger barrel, a plate which covers an opening formed on the body, a control lever turnably attached near the plate, and an adjuster bolt which abuts against the control lever to restrict turn of the control lever and is supported by a stay disposed on the plate.
    Type: Application
    Filed: September 10, 2014
    Publication date: August 18, 2016
    Inventors: Masaki NANKOU, Ryota IWANO, Isao TAKAGISHI
  • Publication number: 20160230727
    Abstract: A fuel injection pump delivers, at high pressure, a fuel to be injected into a combustion chamber of a diesel engine and includes a delivery valve disposed in the middle of a path for pressure-feeding the fuel from a plunger to a fuel injection nozzle. A damping valve is disposed on the downstream side of the delivery valve. The damping valve includes a valve element which has an orifice formed on an axial part thereof and is biased downward (toward the upstream side) by a damping valve spring and a receiving element which has a passage hole formed on an axial part thereof and abuts against the valve element. A recess which communicates with the passage hole is formed on a face of the valve element, the face facing the receiving element.
    Type: Application
    Filed: July 25, 2014
    Publication date: August 11, 2016
    Inventors: Masaki NANKOU, Isao TAKAGISHI, Yuji SHIBA, Kouichi KONDOU, Ryota IWANO