Patents by Inventor Shinichi Yamakawa

Shinichi Yamakawa 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: 10537228
    Abstract: The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. A contact surface of the overtube body with a body wall is constituted of a wall surface member that serves as a rotation-preventing wall surface for preventing rotation in a rotational direction with an axial direction of the overtube body as a center.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: January 21, 2020
    Assignee: FUJIFILM Corporation
    Inventor: Shinichi Yamakawa
  • Patent number: 10456015
    Abstract: Provided is an endoscopic surgical device and an overtube with which a surgeon can easily obtain a desired image and operability is high. The overtube includes a slider inside the overtube body that guides an endoscope and a treatment tool into a body cavity, the first valve member provided in the endoscope insertion passage, and the second valve member provided in the treatment tool insertion passage. F1>F3 and F2>F3 are satisfied when a fixing force for fixing the slider to the endoscope is defined as F1, a fixing force for fixing the slider to the treatment tool is defined as F2, and a frictional force that receives from the first valve member when the endoscope moves forward and backward is defined as F3.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: October 29, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Takumi Dejima, Shinichi Yamakawa
  • Patent number: 10368824
    Abstract: This X-ray CT device uses iterative reconstruction to obtain a CT image with the desired noise reduction or X-ray reduction ratio. An iterative approximation reconstruction unit (136) is provided which, from measured projection data obtained by an X-ray detection unit of the X-ray CT device, iteratively reconstructs a CT image in a reconstruction range of a subject, and iteratively corrects the CT image such that calculated projection data, calculated through forward projection of a CT image, is the same as the difference between measured projection data detected by the X-raw detection unit and calculated projection data. The iterative approximation reconstruction unit is provided with a parameter determination unit (151), an iterative correction unit (152), and a table unit (153) which calculates in advance the relation between each parameter used in the iterative reconstruction, and noise reduction or X-ray reduction ratio in the CT image.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: August 6, 2019
    Assignee: HITACHI, LTD.
    Inventors: Keisuke Yamakawa, Shinichi Kojima
  • Publication number: 20190174997
    Abstract: The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. A contact surface of the overtube body with a body wall is constituted of a wall surface member that serves as a rotation-preventing wall surface for preventing rotation in a rotational direction with an axial direction of the overtube body as a center.
    Type: Application
    Filed: February 13, 2019
    Publication date: June 13, 2019
    Applicant: FUJIFILM Corporation
    Inventor: Shinichi YAMAKAWA
  • Patent number: 10219680
    Abstract: The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. A contact surface of the overtube body with a body wall is constituted of a wall surface member that serves as a rotation-preventing wall surface for preventing rotation in a rotational direction with an axial direction of the overtube body as a center.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: March 5, 2019
    Assignee: FUJIFILM Corporation
    Inventor: Shinichi Yamakawa
  • Publication number: 20180161559
    Abstract: An applicator with a liquid medicine where even when an accidental external pressure is applied during transport or storage, there is no possibility that a liquid medicine storage member is opened and a liquid medicine is impregnated into an applying member so that the liquid medicine can be reliably held but, at the same time, the liquid medicine can be easily impregnated into the applying member when necessary. The applicator with a liquid medicine includes a storage member for storing an applying member, the storage member includes: a bottom film in which the applying member is stored; and a top film which closes the bottom film thus storing the applying member and a liquid medicine storage member, in which the liquid medicine is sealed, in the storage member, and the bottom film has an air chamber capable of storing at least the applying portion and a predetermined amount of air.
    Type: Application
    Filed: June 8, 2016
    Publication date: June 14, 2018
    Applicant: HOGY MEDICAL CO., LTD.
    Inventors: Kazuo SEI, Jiro KATO, Shiro RIKITAKE, Shinichi YAMAKAWA
  • Publication number: 20180116490
    Abstract: Provided is an endoscopic surgical device and an overtube with which a surgeon can easily obtain a desired image and operability is high. The overtube includes a slider inside the overtube body that guides an endoscope and a treatment tool into a body cavity, the first valve member provided in the endoscope insertion passage, and the second valve member provided in the treatment tool insertion passage. F1>F3 and F2>F3 are satisfied when a fixing force for fixing the slider to the endoscope is defined as F1, a fixing force for fixing the slider to the treatment tool is defined as F2, and a frictional force that receives from the first valve member when the endoscope moves forward and backward is defined as F3.
    Type: Application
    Filed: December 26, 2017
    Publication date: May 3, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Takumi DEJIMA, Shinichi YAMAKAWA
  • Patent number: 9895049
    Abstract: Provided is an endoscopic surgical device and an overtube with which a surgeon can easily obtain a desired image and operability is high. The overtube includes a slider inside the overtube body that guides an endoscope and a treatment tool into a body cavity, the first valve member provided in the endoscope insertion passage, and the second valve member provided in the treatment tool insertion passage. F1>F3 and F2>F3 are satisfied when a fixing force for fixing the slider to the endoscope is defined as F1, a fixing force for fixing the slider to the treatment tool is defined as F2, and a frictional force that receives from the first valve member when the endoscope moves forward and backward is defined as F3.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: February 20, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Takumi Dejima, Shinichi Yamakawa
  • Publication number: 20180008129
    Abstract: An endoscopic surgical device that can suitably puncture a body wall with an overtube that having two insertion passages is provided. In a case where a body wall is punctured with the overtube that has two insertion passages through which medical instruments are inserted and that has openings of the insertion passages in a distal end surface, distal end parts of two needle parts of an inner needle are disposed to protrude from the openings in a case where the inner needle is mounted. Accordingly, a distal end portion of the overtube has a tapered shape, cutting blade parts are disposed in the same straight line as seen from a distal end side, and an insertion load is reduced.
    Type: Application
    Filed: September 21, 2017
    Publication date: January 11, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Toshiharu KUWAE, Shinichi YAMAKAWA
  • Publication number: 20170007294
    Abstract: An endoscope insertion part of an endoscope and a treatment tool insertion part of a treatment tool are insertable through an overtube inserted into a body wall, and a slider is provided for moving the endoscope insertion part and the treatment tool insertion part forward and backward in an interlocking manner. An operating part of the treatment tool includes a guide member that guides a cable part so as to be movable forward and backward in an axial direction so that the cable part of the endoscope is kept from being separated from the surface of the operating part beyond a fixed distance. Accordingly, the cable part can be reliably held down by an index finger of a right hand gripping the operating part, and, the operation of the operating part and the movement operation of the endoscope insertion part can be performed with only a right hand.
    Type: Application
    Filed: September 26, 2016
    Publication date: January 12, 2017
    Applicant: FUJIFILM Corporation
    Inventors: Masayuki IWASAKA, Shinichi YAMAKAWA
  • Publication number: 20160235279
    Abstract: The overtube includes a slider within an overtube body, which guides an endoscope and a treatment tool into a body cavity. An endoscope-coupled part and a treatment tool-coupled part are provided inside the slider, and the slider has a dead zone where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a sensing zone where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other. A contact surface of the overtube body with a body wall is constituted of a wall surface member that serves as a rotation-preventing wall surface for preventing rotation in a rotational direction with an axial direction of the overtube body as a center.
    Type: Application
    Filed: March 2, 2016
    Publication date: August 18, 2016
    Applicant: FUJIFILM Corporation
    Inventor: Shinichi YAMAKAWA
  • Publication number: 20160174820
    Abstract: Provided is an endoscopic surgical device and an overtube with which a surgeon can easily obtain a desired image and operability is high. The overtube includes a slider inside the overtube body that guides an endoscope and a treatment tool into a body cavity, the first valve member provided in the endoscope insertion passage, and the second valve member provided in the treatment tool insertion passage. F1>F3 and F2>F3 are satisfied when a fixing force for fixing the slider to the endoscope is defined as F1, a fixing force for fixing the slider to the treatment tool is defined as F2, and a frictional force that receives from the first valve member when the endoscope moves forward and backward is defined as F3.
    Type: Application
    Filed: March 1, 2016
    Publication date: June 23, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Takumi DEJIMA, Shinichi YAMAKAWA
  • Publication number: 20160074021
    Abstract: A tissue sampling device includes a flexible sheath 34; a needle tube 35 which is inserted into the sheath 34 so as to advance and retreat and with which biological tissue is punctured; and an operating unit which is provided on a proximal side of the sheath 34 and is used for operating the advancing and retreating of the needle tube 35. This needle tube 35 has a distal portion provided with a slit 50 extending toward the proximal side from a distal opening 35c, and when the distal portion is in a state of protruding from a distal end of the sheath 34, at least a part of the distal portion is positioned further on the radially outside than the inner surface of the sheath when viewed from an axial direction of the needle tube 35.
    Type: Application
    Filed: November 25, 2015
    Publication date: March 17, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Takumi DEJIMA, Masayuki IWASAKA, Shinichi YAMAKAWA, Manabu MIYAMOTO
  • Publication number: 20150313580
    Abstract: A tissue sampling device including a flexible sheath, a cannula inserted into the sheath so as to be movable back and forth and punctured into body tissue, and an operation unit provided on a proximal end side of the sheath to move the cannula back and forth, wherein the cannula has a distal end part including a slit extending from a distal end opening toward a proximal end side.
    Type: Application
    Filed: July 16, 2015
    Publication date: November 5, 2015
    Inventors: TAKUMI DEJIMA, SHINICHI YAMAKAWA
  • Patent number: 9138130
    Abstract: An assist assembly for propulsion of a tip device of an endoscope in a body cavity includes an attachment sleeve and a support sleeve. A deformable circulation device is disposed to extend over inner and outer surfaces of the support sleeve, for endlessly moving in an axial direction of the tip device. Plural rollers are disposed on the support sleeve in a rotatable manner, for pressing an inner surface of the circulation device. An alignment projection is formed on the inner surface of the circulation device to project at a height L1. A location offset prevention groove is formed in the rollers at a depth L2, for receiving the alignment projection, and satisfying a condition L1?L2, to prevent location offset of the circulation device from the rollers. Drive wheels tension the circulation device in cooperation with the rollers by deforming the alignment projection in the location offset prevention groove.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: September 22, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Takayuki Nakamura, Tsuyoshi Ashida, Yasunori Ohta, Shinichi Yamakawa, Charles Alan Brantingham
  • Patent number: 9107576
    Abstract: An insertion assisting device includes a rotary body formed in a toroidal shape, and a support and drive unit that rotatably supports and rotates the rotary body. The support and drive unit has two supports, a first support and a second support. The first support is formed in a substantially cylindrical shape, and rotatably supports the rotary body. The second support is formed in a substantially triangular tubular shape, is arranged inside the first support, and supports driving gears that transmit a driving force to the rotary body. The second support is shorter than the first support, and is arranged so that front and rear end portions thereof are located inside front and rear end portions of the first support.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: August 18, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Takayuki Nakamura, Tsuyoshi Ashida, Yasunori Ohta, Shinichi Yamakawa, Rick Cornelius, Charles Alan Brantingham
  • Patent number: 9039602
    Abstract: A propelling device includes a traveling body that rotates in a state of being brought into contact with an inner wall of an alimentary canal, an external cylinder around which the traveling body is wound, and a mounting cylinder on which a tip end portion of an endoscope is mounted. Three driven rollers are rotatably attached to the external cylinder. The traveling body is pinched between the driven rollers and driving gears. As the driving gears rotate, the traveling body travels in a circulating manner. A rotating shaft of the driven roller located at the center among the three driven rollers is held by a shaft hole that is made long in a gear arrangement direction in which the driving gears are disposed side by side.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: May 26, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Shinichi Yamakawa, Tsuyoshi Ashida, Takayuki Nakamura, Yasunori Ohta, Charles Alan Brantingham
  • Publication number: 20140228638
    Abstract: An electronic endoscope system is composed of an electronic endoscope, a light source apparatus, and a temperature converter. The electronic endoscope has a CMOS sensor in a distal portion of an insert section to be inserted into a patient's body cavity. Illumination light from the light source apparatus is applied to the body cavity through the distal portion. The temperature converter obtains an average pixel value of an optical black (OB) region out of an imaging signal from the CMOS sensor, and converts the average OB pixel value into a temperature of the CMOS sensor on a frame-by-frame basis with the use of data in a temperature conversion table. The table represents a relationship between the average OB pixel value and the temperature of the CMOS sensor. Light quantity of the illumination light is adjusted in accordance with the temperature of the CMOS sensor to prevent deterioration of image quality.
    Type: Application
    Filed: April 22, 2014
    Publication date: August 14, 2014
    Applicant: FUJIFILM CORPORATION
    Inventors: Tsuyoshi ASHIDA, Jin MURAYAMA, Takayuki NAKAMURA, Hidetoshi HIRATA, Kazuyoshi HARA, Shinichi YAMAKAWA, Takayuki IIDA
  • Patent number: 8795158
    Abstract: An insertion assisting device includes a rotary body in the form of toroid, and a support and drive part for supporting the rotary body in a rotatable manner and rotating it. The support and drive part has an approximately cylindrical supporting member for supporting the rotary body in a rotatable manner. The rotary body is provided with a convex portion for increasing the thickness to improve the strength thereof. A concave portion having a shape corresponding to the shape of the convex portion is formed on a portion of a front end surface of the supporting member, which is made in contact with the convex portion. The concave portion prevents the rotary body from stopping rotating, which may be caused by point contact between the convex portion and the supporting member.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: August 5, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Shinichi Yamakawa, Tsuyoshi Ashida, Takayuki Nakamura, Yasunori Ohta, John J. Allen, Charles Alan Brantingham
  • Publication number: 20140107419
    Abstract: An assist assembly for propulsion of a tip device of an endoscope in a body cavity includes an attachment sleeve and a support sleeve. A deformable circulation device is disposed to extend over inner and outer surfaces of the support sleeve, for endlessly moving in an axial direction of the tip device. Plural rollers are disposed on the support sleeve in a rotatable manner, for pressing an inner surface of the circulation device. An alignment projection is formed on the inner surface of the circulation device to project at a height L1. A location offset prevention groove is formed in the rollers at a depth L2, for receiving the alignment projection, and satisfying a condition L1?L2, to prevent location offset of the circulation device from the rollers. Drive wheels tension the circulation device in cooperation with the rollers by deforming the alignment projection in the location offset prevention groove.
    Type: Application
    Filed: July 8, 2013
    Publication date: April 17, 2014
    Inventors: Takayuki NAKAMURA, Tsuyoshi ASHIDA, Yasunori OHTA, Shinichi YAMAKAWA, Charles Alan BRANTINGHAM