Patents by Inventor Kazuo Ichikawa

Kazuo Ichikawa 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).

  • Publication number: 20240354939
    Abstract: Provided is an image processing device, an image processing method, or a program that can obtain an image for lens opacity determination that facilitates opacity determination for a lens. An image processing device acquires a transillumination image of a lens captured by a capturing device, and performs a flat correction process to reduce illumination unevenness in the transillumination image. In the flat correction process, an average filter is generated on the basis of an original image of the transillumination image, the original image is divided by the average filter, and values after division are multiplied by an average luminance of the original image. The transillumination image after the flat correction process is converted to a binarized image composed of white and black. Determination for lens opacity is performed on the basis of the binarized image.
    Type: Application
    Filed: April 2, 2024
    Publication date: October 24, 2024
    Applicants: KI MEDIC CO., INC, SHINSHU UNIVERSITY
    Inventors: Kazuo ICHIKAWA, Kiyoshi TANAKA, Sho YOKOYAMA, Yoshiki TANAKA, Kosuke YASUZAWA
  • Patent number: 11806281
    Abstract: Provided is an ophthalmic surgery instrument that is capable of simplifying the structure of a rod-shaped portion, which is inserted into an eyeball during ophthalmic surgery, and that is suitable for excising a to-be-excised part of the eyeball. The ophthalmic surgery instrument includes a rod-shaped portion that is inserted into an eyeball during ophthalmic surgery. The rod-shaped portion has a single passage formed therein so as to penetrate from one end portion thereof to another end portion thereof. A bent portion is formed at a tip end of the rod-shaped portion. A liquid is caused to flow through the passage to flow out from a tip end opening portion of the passage or a to-be-excised part is sucked through the passage while excising the to-be-excised part with the bent portion.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: November 7, 2023
    Assignee: CHUKYO MEDICAL CO., INC.
    Inventors: Kazuo Ichikawa, Hiroto Toda
  • Publication number: 20230053481
    Abstract: Provided is a visual target display device or a visual target presentation method which can test the cone-specific visual function more accurately in a device that displays a visual target, of a chromatic color, for testing the color-related visual function of a subject or a method of presenting the visual target. A visual target of a chromatic color and a background around the visual target are presented in such a way that the brightness of the background is a numerical value between a numerical value 10% less than the brightness of the visual target and a numerical value 10% greater than the brightness of the visual target and a combination of the color of the visual target and the color of the background is a combination of colors which are in a relationship of confusion colors in dichromatism.
    Type: Application
    Filed: July 28, 2022
    Publication date: February 23, 2023
    Applicant: CHUKYO MEDICAL CO., INC.
    Inventors: Kazuo ICHIKAWA, Sho YOKOYAMA, Yoshiki TANAKA
  • Patent number: 11576814
    Abstract: Provided is an ophthalmic instrument that is for retaining a tube member for providing communication between the inside and the outside of an eyeball, such that the tube member is stuck into an outer membrane of the eyeball and that is suitable for retaining the tube member at an outer peripheral portion of a cornea. An ophthalmic instrument includes a main body and a needle portion connected to the main body. The main body has a straight portion and a bent portion. When attaching a tube member to an eyeball, first, the needle portion is inserted through the tube member, and the tube member is stuck into an outer peripheral portion of a cornea as the outer membrane of the eyeball while a hole is made in the outer peripheral portion of the cornea with the needle portion.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: February 14, 2023
    Assignee: CHUKYO MEDICAL CO., INC.
    Inventor: Kazuo Ichikawa
  • Publication number: 20220378469
    Abstract: Provided is an eyeball attachment tube that is temporarily attached to an outer membrane of an eyeball in ophthalmic surgery for communication between the inside and the outside of the eyeball such that the eyeball attachment tube is inhibited from becoming unstable when attached in a direction deviating from a direction perpendicular to the external surface of the eyeball. An eyeball attachment tube includes: a tubular portion configured to be in a state of puncturing an outer membrane when the eyeball attachment tube is attached to the outer membrane; and a large diameter portion which is disposed on a proximal end side of the tubular portion. An end portion of the large diameter portion on the tubular portion side is formed as a plane inclined relative to a center axis of the tubular portion.
    Type: Application
    Filed: April 26, 2022
    Publication date: December 1, 2022
    Applicant: CHUKYO MEDICAL CO., INC.
    Inventors: Kazuo ICHIKAWA, Hiroto TODA
  • Patent number: 11248558
    Abstract: An engine includes an output shaft, a cylinder block, a cylinder head, a cap portion, and head bolts. The cylinder block, the cylinder head, and the cap portion are fastened together with the head bolts. The cylinder block includes a cylinder portion and a plurality of output shaft supporting portions. When an outer wall face of at least one of the plurality of output shaft supporting portions is viewed along an output shaft axial direction, the outer wall face includes a first rib diagonally extending from a supporting portion of the output shaft toward one of two head bolt holes.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: February 15, 2022
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Kazuo Ichikawa, Yoshihisa Nou
  • Patent number: 11118534
    Abstract: An engine includes an output shaft, a cylinder head, a cylinder block, and a plurality of head bolts. The cylinder block includes three or more cylinder parts, a plurality of connecting portions, a plurality of output shaft supporting parts, and a plurality of head bolt holes. A side wall face of at least one cylinder part includes a first rib. The first rib diagonally extends from the connecting portion toward a head bolt hole base.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: September 14, 2021
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Kazuo Ichikawa, Yoshihisa Nou
  • Publication number: 20210275353
    Abstract: Provided is an ophthalmic surgery instrument that is capable of simplifying the structure of a rod-shaped portion, which is inserted into an eyeball during ophthalmic surgery, and that is suitable for excising a to-be-excised part of the eyeball. The ophthalmic surgery instrument includes a rod-shaped portion that is inserted into an eyeball during ophthalmic surgery, and a grip portion that is connected to a base end portion of the rod-shaped portion. The rod-shaped portion has a single passage formed therein so as to penetrate from one end portion thereof to another end portion thereof. A bent portion is formed at a tip end of the rod-shaped portion. A liquid is caused to flow through the passage to flow out from a tip end opening portion of the passage or a to-be-excised part is sucked through the passage while excising the to-be-excised part with the bent portion.
    Type: Application
    Filed: February 22, 2021
    Publication date: September 9, 2021
    Applicant: CHUKYO MEDICAL CO., INC.
    Inventors: Kazuo ICHIKAWA, Hiroto TODA
  • Publication number: 20210215119
    Abstract: An engine includes an output shaft, a cylinder block, a cylinder head, a cap portion, and head bolts. The cylinder block, the cylinder head, and the cap portion are fastened together with the head bolts. The cylinder block includes a cylinder portion and a plurality of output shaft supporting portions. When an outer wall face of at least one of the plurality of output shaft supporting portions is viewed along an output shaft axial direction, the outer wall face includes a first rib diagonally extending from a supporting portion of the output shaft toward one of two head bolt holes.
    Type: Application
    Filed: November 27, 2018
    Publication date: July 15, 2021
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Kazuo ICHIKAWA, Yoshihisa NOU
  • Publication number: 20210205127
    Abstract: Provided is an ophthalmic instrument that is for retaining a tube member for providing communication between the inside and the outside of an eyeball, such that the tube member is stuck into an outer membrane of the eyeball and that is suitable for retaining the tube member at an outer peripheral portion of a cornea. An ophthalmic instrument includes a main body and a needle portion connected to the main body. The main body has a straight portion and a bent portion. When attaching a tube member to an eyeball, first, the needle portion is inserted through the tube member, and the tube member is stuck into an outer peripheral portion of a cornea as the outer membrane of the eyeball while a hole is made in the outer peripheral portion of the cornea with the needle portion.
    Type: Application
    Filed: December 17, 2020
    Publication date: July 8, 2021
    Applicant: CHUKYO MEDICAL CO., INC.
    Inventor: Kazuo ICHIKAWA
  • Publication number: 20210186324
    Abstract: Provided are a method, a device, or a storage medium having a program stored therein for easily determining a crystalline lens nucleus state. A gray scale anterior segment image taken by optical coherence tomography is obtained, and posterization of the anterior segment image is performed to obtain tone-changed images having 3 tones, 4 tones, and 5 tones. One, of a plurality of predetermined grades, corresponding to the crystalline lens nucleus state is determined based on a combination of states of observed images of the crystalline lens nucleus in the tone-changed images. The grades are set for classification according to whether or not an image of a crystalline lens nucleus is observed, whether the observed image is spot-shaped or band-shaped, or whether or not the entire image of the crystalline lens nucleus is observed.
    Type: Application
    Filed: December 12, 2020
    Publication date: June 24, 2021
    Applicant: CHUKYO MEDICAL CO., INC.
    Inventors: Kiyoyuki MAJIMA, Kazuo ICHIKAWA, Kei ICHIKAWA
  • Publication number: 20210156337
    Abstract: A cylinder block includes a body part where a cylinder is formed, an outer wall part made of fiber reinforced resin and surrounding an outer circumference of the body part, and a metal member attached to the outer wall part. The outer wall part is comprised of an inner layer surrounding the outer circumference of the body part, and an outer layer surrounding an outer circumference of the inner layer. A density of reinforcing fiber contained in the outer layer is higher than a density of reinforcing fiber contained in the inner layer. The metal member is attached to the outer wall part so as to contact the outer layer. The reinforcing fiber contained in the outer layer has an electric insulating property.
    Type: Application
    Filed: November 17, 2020
    Publication date: May 27, 2021
    Inventors: Kazuo Ichikawa, Tsuguhisa Miyamoto, Yoshihisa Nou, Yuma Miyauchi
  • Patent number: 11015549
    Abstract: A cylinder block includes a body part where a cylinder is formed, an outer wall part made of fiber reinforced resin and surrounding an outer circumference of the body part, and a metal member attached to the outer wall part. The outer wall part is comprised of an inner layer surrounding the outer circumference of the body part, and an outer layer surrounding an outer circumference of the inner layer. A density of reinforcing fiber contained in the outer layer is higher than a density of reinforcing fiber contained in the inner layer. The metal member is attached to the outer wall part so as to contact the outer layer. The reinforcing fiber contained in the outer layer has an electric insulating property.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: May 25, 2021
    Assignee: Mazda Motor Corporation
    Inventors: Kazuo Ichikawa, Tsuguhisa Miyamoto, Yoshihisa Nou, Yuma Miyauchi
  • Patent number: 11002220
    Abstract: A cylinder block includes a metal body part having a cylinder, and an outer wall part made of fiber reinforced resin, surrounding an outer circumference of the body part. A part of the outer wall part at BDC side in a cylinder axis direction contacts a bottom wall forming part. The outer wall part is comprised of an inner layer surrounding the outer circumference of the body part, and an outer layer surrounding an outer circumference of the inner layer. A density of reinforcing fiber contained in the outer layer is higher than that in the inner layer. A thickness of a part of the inner layer at BDC side in the cylinder axis direction is greater than that of the TDC-side inner layer. A thickness of a part of the outer layer at TDC side in the cylinder axis direction is greater than that of the BDC-side outer layer.
    Type: Grant
    Filed: November 18, 2020
    Date of Patent: May 11, 2021
    Assignee: Mazda Motor Corporation
    Inventors: Kazuo Ichikawa, Tsuguhisa Miyamoto, Yoshihisa Nou, Yuma Miyauchi
  • Publication number: 20210087999
    Abstract: An engine includes an output shaft, a cylinder head, a cylinder block, and a plurality of head bolts. The cylinder block includes three or more cylinder parts, a plurality of connecting portions, a plurality of output shaft supporting parts, and a plurality of head bolt holes. A side wall face of at least one cylinder part includes a first rib. The first rib diagonally extends from the connecting portion toward a head bolt hole base.
    Type: Application
    Filed: November 27, 2018
    Publication date: March 25, 2021
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Kazuo ICHIKAWA, Yoshihisa NOU
  • Publication number: 20200355139
    Abstract: There is provided an engine piston including a piston main body and a piston pin. The piston main body includes a piston head that has a crown surface forming a part of a wall of a combustion chamber and a pair of pin bosses that are connected to a side of the piston head opposite to the crown surface, arranged with a distance between the pin bosses in a first direction included in a radial direction of the piston head, and respectively have pin holes for the piston pin, the pin holes penetrating in the first direction. The piston head includes a pair of hollow parts extending in a second direction orthogonal to both the axial direction and the first direction at a position between the crown surface and each of the pin holes in the axial direction and a particulate filler filled in the pair of hollow parts.
    Type: Application
    Filed: April 27, 2020
    Publication date: November 12, 2020
    Inventors: Kazuo ICHIKAWA, Yusuke MARUTANI, Akihiro TAKEZAWA
  • Patent number: 10634247
    Abstract: Disclosed is an engine piston structure including an outer peripheral portion (6) formed along an outer shape of a piston (1), and having a predetermined thickness, a pair of piston pin supporters (7) having peripheral walls (7b) having a predetermined thickness, and couplers (8) each coupling the pair of the piston pin supporters (7) to the outer peripheral portion (6). The outer peripheral portion (6) and the peripheral walls (7b) of the piston pin supporters (7) are solid. Each of the coupler (8) is porous. The outer peripheral portion (6), the piston pin supporters (7), and the couplers (8) are made of a metal material and are integrally formed together.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: April 28, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Kazuo Ichikawa, Osamu Aoki, Takashi Ikai, Kouichi Nakano, Yoshiyuki Koga, Shinichi Fujimaki
  • Patent number: 10478057
    Abstract: Provided are an apparatus and a method, for testing a visual function of a subject, that make it possible to appropriately test the sensitivity for each color for each region of a visual field. In a state in which the subject is caused to gaze at one point 6 in a background 7, a visual target 5 for testing a color-related visual function of the subject is displayed in a peripheral region of the gaze point 6 such that the luminance of the background 7 has a numerical value included between a numerical value smaller by 10% and a numerical value greater by 10% than the luminance of the visual target 5. Then, for each measurement point 300, a threshold that is a size of the visual target 5 that determines whether or not the subject can perceive the visual target 5 is obtained for a plurality of times.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: November 19, 2019
    Assignee: CHUKYO MEDICAL CO., INC.
    Inventors: Kazuo Ichikawa, Hiroyuki Sato, Yoshiki Tanaka
  • Patent number: 10470873
    Abstract: An intraocular lens 1 includes a lens 2 and a haptic 3 connected to the lens 2. The lens 2 is disposed behind an iris 7 in an eye of a patient. The haptic 3 has a main body 3a and first and second projections 3d and 3e. The main body 3a extends from the lens 2 outward in a radial direction about a visual axis C of the patient. The first and second projections 3d and 3e are located so as to project from the main body 3a toward spaces between a plurality of ciliary zonules 10 connecting a crystalline lens 11 and a ciliary body 8 in the eye. Accordingly, an intraocular lens and a haptic for an intraocular lens that are able to inhibit the position of a lens from being displaced are provided.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: November 12, 2019
    Assignee: CHUKYO MEDICAL CO., INC.
    Inventors: Kazuo Ichikawa, Norihiko Yoshida
  • Patent number: 10463385
    Abstract: A surgical instrument (1) is provided with a rigid probe (2), and cuts off the trabecular meshwork by inserting this probe (2) into the canal of Schlemm. An inner tube portion having a cutter is equipped inside the probe, and the trabecular meshwork sucked in from a hole portion (22) is cut off by the cutter due to the movement of the inner tube portion. A protection portion (21) is formed on the tip the probe (2) and protects the outer wall of the canal of Schlemm when cutting the trabecular meshwork. According to the invention, an ophthalmic surgical instrument for glaucoma patients is provided, the surgical instrument having excellent operability and preventing cutting of parts that should not be cut off without fail.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: November 5, 2019
    Assignee: CHUKYO MEDICAL CO., INC.
    Inventor: Kazuo Ichikawa