Patents by Inventor Isamu Nakajima

Isamu Nakajima 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: 10932653
    Abstract: Maximum hardness of a flexible tube section of an endoscope is set such that substantial maximum hardness at a time when an over-tube is attached is equal to or lower than maximum hardness of a flexible tube section of an endoscope. That is, the maximum hardness of the flexible tube section of the endoscope is set substantially equal to hardness obtained by subtracting hardness of the over-tube itself from the maximum hardness of the flexible tube section of the endoscope. In the endoscopes including a hardness changing mechanism, maximum hardness of the endoscope, to which the over-tube is not attached, and maximum hardness of the endoscope, to which the over-tube is attached, are set substantially equal.
    Type: Grant
    Filed: September 16, 2017
    Date of Patent: March 2, 2021
    Assignee: OLYMPUS CORPORATION
    Inventors: Suguru Okaniwa, Seisuke Takase, Hidehiro Joko, Isamu Nakajima
  • Patent number: 10925470
    Abstract: An endoscope system sets a hardness variation of a thick flexible tube portion and a hardness variation of a thin flexible tube portion such that their respective ratios against base hardness are constant, and as each flexible tube portion becomes thicker, the hardness variation increases and an endoscope with a relatively thin flexible tube portion has a smaller hardness variation. This makes it possible to avoid situations like an endoscope with a thick flexible tube portion lacking hardness or an endoscope with a thin flexible tube portion becoming too hard, and makes it possible to perform optimum insertion operation in accordance with the thickness of a flexible tube.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: February 23, 2021
    Assignee: OLYMPUS CORPORATION
    Inventors: Suguru Okaniwa, Seisuke Takase, Hidehiro Joko, Isamu Nakajima
  • Patent number: 10888214
    Abstract: An endoscope system includes an endoscope including an insertion section formed in an elongated shape, a flexible tube portion provided at a proximal end side of the insertion section, and a rigidity changing mechanism portion provided inside the flexible tube portion, and configured to change rigidity of the flexible tube portion by an operation performed on a hand side, and a flexible overtube formed in a cylindrical shape extending in an axial direction, into which the insertion section is inserted, where a rigidity change region of the flexible tube portion by the rigidity changing mechanism portion is set to be from an intermediate portion to a proximal end portion of the flexible tube portion, and a total length of the overtube in the axial direction is set to be shorter than a total length of the rigidity change region.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: January 12, 2021
    Assignee: OLYMPUS CORPORATION
    Inventors: Suguru Okaniwa, Seisuke Takase, Hidehiro Joko, Isamu Nakajima
  • Publication number: 20200323421
    Abstract: An endoscope according to the present invention includes an elongated insertion portion, a flexible tube included in a proximal end side of the insertion portion, a rigidity changing mechanism provided inside the flexible tube and configured to change rigidity of the flexible tube by operation on a hand side, and a large diameter portion provided on an outer circumference of the flexible tube and configured to indicate a distal end of the rigidity changing region of the flexible tube by the rigidity changing mechanism.
    Type: Application
    Filed: June 25, 2020
    Publication date: October 15, 2020
    Applicant: OLYMPUS CORPORATION
    Inventors: Suguru OKANIWA, Seisuke TAKASE, Hidehiro JOKO, Isamu NAKAJIMA
  • Patent number: 10799091
    Abstract: An endoscope includes: an insertion portion formed in an elongated shape; a mesh tube formed by braiding thin wires in a tubular shape and provided in a shape of a cylinder inside the insertion portion; and a rigidity changing mechanism including a coil inserted in the insertion portion and formed by winding an element wire, and a wire inserted in the coil and formed by intertwining element wires, the rigidity changing mechanism being configured to apply a compression force to the coil by pulling the wire, to adjust a bending rigidity of the insertion portion, wherein a dimension of a gap created between the thin wires in the mesh tube is set to be smaller than a diameter of the wire and larger than a diameter of each of the element wires of the wire.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: October 13, 2020
    Assignee: OLYMPUS CORPORATION
    Inventors: Suguru Okaniwa, Seisuke Takase, Hidehiro Joko, Isamu Nakajima
  • Publication number: 20190387962
    Abstract: An endoscope insertion shape observation apparatus has a processor configured to detect an insertion shape of an insertion portion inserted into a subject P, and calculate operation information, including one of easy insertion information or difficult insertion information, of insertion operation obtained in operation of inserting the insertion portion. The operation information is determined based on an insertion length of the insertion portion. The processor is also configured to simultaneously display of a result of the generation and the insertion shape on the monitor, and change between the easy insertion information and the difficult insertion information.
    Type: Application
    Filed: July 17, 2019
    Publication date: December 26, 2019
    Applicant: OLYMPUS CORPORATION
    Inventors: Takechiyo NAKAMITSU, Kensuke MIYAKE, Akira MURATA, Isamu NAKAJIMA
  • Publication number: 20190290108
    Abstract: An endoscope insertion observation apparatus includes a processor designed to perform functions including: detecting an insertion state of an insertion portion of an endoscope that is insertable into and extractable from a subject; determining whether or not the insertion portion has reached a second site in the subject from a first site in the subject and/or whether the insertion portion has reached the first site from the second site in the subject based on a detection result of the insertion state; and calculating a duration of movement of the insertion portion from the first site to the second site after determining that the insertion portion has reached the second site, or a duration of movement of the insertion portion from the second site to the first site after determining that the insertion portion has reached the first site.
    Type: Application
    Filed: June 12, 2019
    Publication date: September 26, 2019
    Applicant: OLYMPUS CORPORATION
    Inventors: Takechiyo NAKAMITSU, Kensuke MIYAKE, Akira MURATA, Isamu NAKAJIMA
  • Publication number: 20180263469
    Abstract: An endoscope system includes an endoscope including an insertion section formed in an elongated shape, a flexible tube portion provided at a proximal end side of the insertion section, and a rigidity changing mechanism portion provided inside the flexible tube portion, and configured to change rigidity of the flexible tube portion by an operation performed on a hand side, and a flexible overtube formed in a cylindrical shape extending in an axial direction, into which the insertion section is inserted, where a rigidity change region of the flexible tube portion by the rigidity changing mechanism portion is set to be from an intermediate portion to a proximal end portion of the flexible tube portion, and a total length of the overtube in the axial direction is set to be shorter than a total length of the rigidity change region.
    Type: Application
    Filed: May 18, 2018
    Publication date: September 20, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Suguru OKANIWA, Seisuke TAKASE, Hidehiro JOKO, Isamu NAKAJIMA
  • Publication number: 20180256010
    Abstract: An endoscope includes: an insertion portion formed in an elongated shape; a mesh tube formed by braiding thin wires in a tubular shape and provided in a shape of a cylinder inside the insertion portion; and a rigidity changing mechanism including a coil inserted in the insertion portion and formed by winding an element wire, and a wire inserted in the coil and formed by intertwining element wires, the rigidity changing mechanism being configured to apply a compression force to the coil by pulling the wire, to adjust a bending rigidity of the insertion portion, wherein a dimension of a gap created between the thin wires in the mesh tube is set to be smaller than a diameter of the wire and larger than a diameter of each of the element wires of the wire.
    Type: Application
    Filed: May 14, 2018
    Publication date: September 13, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Suguru OKANIWA, Seisuke TAKASE, Hidehiro JOKO, Isamu NAKAJIMA
  • Publication number: 20180249892
    Abstract: An endoscope system sets a hardness variation of a thick flexible tube portion and a hardness variation of a thin flexible tube portion such that their respective ratios against base hardness are constant, and as each flexible tube portion becomes thicker, the hardness variation increases and an endoscope with a relatively thin flexible tube portion has a smaller hardness variation. This makes it possible to avoid situations like an endoscope with a thick flexible tube portion lacking hardness or an endoscope with a thin flexible tube portion becoming too hard, and makes it possible to perform optimum insertion operation in accordance with the thickness of a flexible tube.
    Type: Application
    Filed: May 4, 2018
    Publication date: September 6, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Suguru OKANIWA, Seisuke TAKASE, Hidehiro JOKO, Isamu NAKAJIMA
  • Patent number: 10045818
    Abstract: A treatment tool for an endoscope includes a sheath which is extended along a longitudinal axis; a pre-curved portion which is disposed at a distal portion of the sheath; a knife wire lumen which is formed along the longitudinal axis of the sheath; a first communication hole and a second communication hole which are open on an outer circumferential surface to communicate the outer circumferential surface positioned with the knife wire lumen; a wire-shaped cutting portion which is protruded from the first communication hole and the second communication hole, and is extended in a position spaced from the outer circumferential surface and the virtual plane; a fixing portion which is provided to fix an end portion of a wire connected to the cutting portion inside the knife wire lumen, and a bending portion which is provided to bend the wire.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: August 14, 2018
    Assignee: OLYMPUS CORPORATION
    Inventors: Tsukasa Kobayashi, Yuji Sakamoto, Hiroyuki Morishita, Isamu Nakajima
  • Publication number: 20180035870
    Abstract: An endoscope including: a tube having flexibility and extending from a hand side to a distal end side along a longitudinal direction, the tube being provided to an insertion portion configured to be inserted into an object; and a strand formed by twining a plurality of wires each other and arranged so as to extend in the tube, the strand having a distal end portion fixed to a distal end side of the tube, wherein the strand is pulled from the hand side of the tube and a twining direction of the plurality of wires of the strand is reversed in a middle of extension in the tube.
    Type: Application
    Filed: October 17, 2017
    Publication date: February 8, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Suguru OKANIWA, Seisuke TAKASE, Hidehiro JOKO, Isamu NAKAJIMA
  • Publication number: 20180000325
    Abstract: Maximum hardness of a flexible tube section of an endoscope is set such that substantial maximum hardness at a time when an over-tube is attached is equal to or lower than maximum hardness of a flexible tube section of an endoscope. That is, the maximum hardness of the flexible tube section of the endoscope is set substantially equal to hardness obtained by subtracting hardness of the over-tube itself from the maximum hardness of the flexible tube section of the endoscope. In the endoscopes including a hardness changing function, maximum hardness of the endoscope, to which the over-tube is not attached, and maximum hardness of the endoscope, to which the over-tube is attached, are set substantially equal.
    Type: Application
    Filed: September 16, 2017
    Publication date: January 4, 2018
    Applicant: OLYMPUS CORPORATION
    Inventors: Suguru OKANIWA, Seisuke TAKASE, Hidehiro JOKO, Isamu NAKAJIMA
  • Publication number: 20160338771
    Abstract: A treatment tool for an endoscope includes a sheath which is extended along a longitudinal axis; a pre-curved portion which is disposed at a distal portion of the sheath; a knife wire lumen which is formed along the longitudinal axis of the sheath; a first communication hole and a second communication hole which are open on an outer circumferential surface to communicate the outer circumferential surface positioned with the knife wire lumen; a wire-shaped cutting portion which is protruded from the first communication hole and the second communication hole, and is extended in a position spaced from the outer circumferential surface and the virtual plane; a fixing portion which is provided to fix an end portion of a wire connected to the cutting portion inside the knife wire lumen, and a bending portion which is provided to bend the wire.
    Type: Application
    Filed: August 1, 2016
    Publication date: November 24, 2016
    Applicant: OLYMPUS CORPORATION
    Inventors: Tsukasa KOBAYASHI, Yuji SAKAMOTO, Hiroyuki MORISHITA, Isamu NAKAJIMA
  • Patent number: 7558904
    Abstract: The controller of the present invention includes an address management table that stores address information of valid data among the data stored in a flash memory, a status flag stored in the flash memory indicating that the data before rewriting and the data after rewriting are in process of rewriting, and a data rewriting process unit (the data management means) that changes the address information of the valid data from the data before rewriting to the data after rewriting at a given timing. It is thus possible to specify an area in process of rewriting even if the power supply is stopped in process of rewriting. It is also possible to judge the valid data when the process is restarted from the power off and erase the unnecessary data.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: July 7, 2009
    Assignee: Spansion LLC
    Inventor: Isamu Nakajima
  • Patent number: 7487286
    Abstract: A flash memory is arranged to notice the state inside the flash memory to the outside for supporting a garbage collection. The flash memory includes a state information generator and an output unit. The state information generator generates state information that indicates a state of each user area for noticing it to the outside. The output unit outputs the state information to the outside for noticing the state inside the flash memory to the outside.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: February 3, 2009
    Assignee: Spansion LLC
    Inventors: Osamu Nagano, Isamu Nakajima
  • Patent number: 7185140
    Abstract: A method for storing in a nonvolatile memory by which a data restoration process is performed properly after a return from, for example, a shutoff of the supply of power. A storage management information store section in a central processing unit stores storage management information regarding the storage management of data to be stored in a nonvolatile memory by a data store section. The unit of the data is smaller than an erase unit in the nonvolatile memory. A storage completion information store section stores storage completion information indicative of the completion of the storing of the storage management information in the nonvolatile memory. A stored information judgment section judges, after a return from interruption of a process which occurred in the middle of the storage management information being stored, by referring to the storage completion information whether the storing of the storage management information is completed.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: February 27, 2007
    Assignee: Spansion, LLC
    Inventor: Isamu Nakajima
  • Publication number: 20060170423
    Abstract: A buried type measuring instrument has a sensing unit 10A which is formed in part of a case 10 and senses a physical value pertaining to a change of state of a structure. This case 10 accommodates a transducer 11 for converting the physical value sensed by the sensing unit 10A; a transmission circuit unit 12 for outputting a carrier signal modulated by an output of the transducer 11; a drive unit 13 for driving the transducer 11 and the transmission circuit unit 12 with power supply from a battery 15; and a transmission coil 14 for receiving an output of the transmission circuit unit 12 and generating a low frequency magnetic field signal. This case 10 is buried in the structure. Consequently, it is possible to provide a measuring instrument which can adopt a radio communication mode to secure a sufficient cutoff function of the structure and avoid damage to the measuring sensor, allows remote data acquisition, and even has no adverse effect on strength characteristics of the structure.
    Type: Application
    Filed: December 25, 2003
    Publication date: August 3, 2006
    Inventors: Yuji Kohgo, Isamu Nakajima, Shinichi Endoh, Ryoichi Tohmetsuka, Nobuyoshi Yamazaki, Komci Yano, Akira Takahashi, Toshiaki Kakue
  • Publication number: 20060018227
    Abstract: The controller of the present invention includes an address management table that stores address information of valid data among the data stored in a flash memory, a status flag stored in the flash memory indicating that the data before rewriting and the data after rewriting are in process of rewriting, and a data rewriting process unit (the data management means) that changes the address information of the valid data from the data before rewriting to the data after rewriting at a given timing. It is thus possible to specify an area in process of rewriting even if the power supply is stopped in process of rewriting. It is also possible to judge the valid data when the process is restarted from the power off and erase the unnecessary data.
    Type: Application
    Filed: July 22, 2005
    Publication date: January 26, 2006
    Inventor: Isamu Nakajima
  • Publication number: 20050166005
    Abstract: A flash memory is arranged to notice the state inside the flash memory to the outside for supporting a garbage collection. The flash memory includes a state information generator and an output unit. The state information generator generates state information that indicates a state of each user area for noticing it to the outside. The output unit outputs the state information to the outside for noticing the state inside the flash memory to the outside.
    Type: Application
    Filed: March 18, 2005
    Publication date: July 28, 2005
    Inventors: Osamu Nagano, Isamu Nakajima