Patents by Inventor Masamichi Yanai
Masamichi Yanai 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).
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Publication number: 20240052840Abstract: A blood pump system includes a pump housing and an impeller for rotating in a pump chamber within the housing. The impeller has a first side and a second side opposite the first side. The system includes a stator having drive coils for applying a torque to the impeller and at least one bearing mechanism for suspending the impeller within the pump chamber. The system includes a position control mechanism for moving the impeller in an axial direction within the pump chamber to adjust a size of a first gap and a size of a second gap, thereby controlling a washout rate at each of the first gap and the second gap. The first gap is defined by a distance between the first side and the housing and the second gap is defined by a distance between the second side and the pump housing.Type: ApplicationFiled: September 1, 2023Publication date: February 15, 2024Applicant: TC1 LLCInventors: Masamichi Yanai, Shunzhou Yu, Tao Zhang
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Publication number: 20230414923Abstract: A blood pump system is implantable in a patient for ventricular support. A pumping chamber has an inlet for receiving blood from a ventricle of the patient. An impeller is received in the pumping chamber. A motor is coupled to the impeller for driving rotation of the impeller. A motor controller is provided for tracking systolic and diastolic phases of a cardiac cycle of the patient and supplying a variable voltage signal to the motor in a variable speed mode to produce a variable impeller speed linked to the cardiac cycle. The impeller speed comprises a ramping up to an elevated speed during the diastolic phase in order to reduce a load on the ventricle at the beginning of the systolic phase.Type: ApplicationFiled: June 30, 2023Publication date: December 28, 2023Applicant: TC1 LLCInventors: Alexander Medvedev, Masamichi Yanai
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Publication number: 20230346309Abstract: A patient-monitoring device includes a main device with a recess and a first group of electrical contacts provided in the recess. The patient-monitoring device further includes a battery pack that engages the recess and that includes a second group of electrical contacts. A first gasket is provided in patient-monitoring device and is located on either the main device or the battery pack. The first gasket surrounds the first group of electrical contacts and the second group of electrical contacts when the battery pack engages the recess.Type: ApplicationFiled: April 28, 2023Publication date: November 2, 2023Inventors: Atsuhiko HIRATA, Nobuhiro KONDO, Masamichi YANAI
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Publication number: 20230352953Abstract: A charger assembly including a housing with a first surface, a second surface that is not parallel with the first surface, a first recess in the first surface, a second recess in the second surface, and a first opening connecting the first recess and the second recess. The charger assembly further includes a first group of electrical contacts in the first recess and a second group of electrical contacts in the second recess. Each of the first recess and the second recess is configured to receive a battery pack.Type: ApplicationFiled: April 28, 2023Publication date: November 2, 2023Inventors: Atsuhiko HIRATA, Nobuhiro KONDO, Masamichi YANAI
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Patent number: 11781551Abstract: A blood pump system includes a pump housing and an impeller for rotating in a pump chamber within the housing. The impeller has a first side and a second side opposite the first side. The system includes a stator having drive coils for applying a torque to the impeller and at least one bearing mechanism for suspending the impeller within the pump chamber. The system includes a position control mechanism for moving the impeller in an axial direction within the pump chamber to adjust a size of a first gap and a size of a second gap, thereby controlling a washout rate at each of the first gap and the second gap. The first gap is defined by a distance between the first side and the housing and the second gap is defined by a distance between the second side and the pump housing.Type: GrantFiled: April 26, 2021Date of Patent: October 10, 2023Assignee: TC1 LLCInventors: Masamichi Yanai, Shunzhou Yu, Tao Zhang
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Patent number: 11724094Abstract: A blood pump system is implantable in a patient for ventricular support. A pumping chamber has an inlet for receiving blood from a ventricle of the patient. An impeller is received in the pumping chamber. A motor is coupled to the impeller for driving rotation of the impeller. A motor controller is provided for tracking systolic and diastolic phases of a cardiac cycle of the patient and supplying a variable voltage signal to the motor in a variable speed mode to produce a variable impeller speed linked to the cardiac cycle. The impeller speed comprises a ramping up to an elevated speed during the diastolic phase in order to reduce a load on the ventricle at the beginning of the systolic phase.Type: GrantFiled: March 18, 2021Date of Patent: August 15, 2023Assignee: TC1 LLCInventors: Alexander Medvedev, Masamichi Yanai
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Patent number: 11213227Abstract: A pulse oximeter includes a curved holder. A flexible substrate is coupled to a curved inner surface of an outer portion of the curved holder. A light emitter, a light receiver, and a reinforcement are coupled to a curved inner surface of the flexible substrate. The reinforcement is curved to extend in conformance with the curved form of the flexible substrate. The material of the reinforcement has a Young's modulus that is larger than the Young's modulus of the material of the outer portion and the Young's modulus of the material of an inner portion.Type: GrantFiled: April 23, 2020Date of Patent: January 4, 2022Assignee: MURATA VIOS, INC.Inventors: Nobuhiro Kondo, Yoshitaka Hane, Kenichi Fukuda, Masamichi Yanai
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Publication number: 20210339001Abstract: A blood pump system is implantable in a patient for ventricular support. A pumping chamber has an inlet for receiving blood from a ventricle of the patient. An impeller is received in the pumping chamber. A motor is coupled to the impeller for driving rotation of the impeller. A motor controller is provided for tracking systolic and diastolic phases of a cardiac cycle of the patient and supplying a variable voltage signal to the motor in a variable speed mode to produce a variable impeller speed linked to the cardiac cycle. The impeller speed comprises a ramping up to an elevated speed during the diastolic phase in order to reduce a load on the ventricle at the beginning of the systolic phase.Type: ApplicationFiled: March 18, 2021Publication date: November 4, 2021Inventors: Alexander Medvedev, Masamichi Yanai
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Publication number: 20210330222Abstract: A pulse oximeter includes a curved holder. A flexible substrate is coupled to a curved inner surface of an outer portion of the curved holder. A light emitter, a light receiver, and a reinforcement are coupled to a curved inner surface of the flexible substrate. The reinforcement is curved to extend in conformance with the curved form of the flexible substrate. The material of the reinforcement has a Young's modulus that is larger than the Young's modulus of the material of the outer portion and the Young's modulus of the material of an inner portion.Type: ApplicationFiled: April 23, 2020Publication date: October 28, 2021Inventors: Nobuhiro KONDO, Yoshitaka HANE, Kenichi FUKUDA, Masamichi YANAI
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Publication number: 20210246902Abstract: A blood pump system includes a pump housing and an impeller for rotating in a pump chamber within the housing. The impeller has a first side and a second side opposite the first side. The system includes a stator having drive coils for applying a torque to the impeller and at least one bearing mechanism for suspending the impeller within the pump chamber. The system includes a position control mechanism for moving the impeller in an axial direction within the pump chamber to adjust a size of a first gap and a size of a second gap, thereby controlling a washout rate at each of the first gap and the second gap. The first gap is defined by a distance between the first side and the housing and the second gap is defined by a distance between the second side and the pump housing.Type: ApplicationFiled: April 26, 2021Publication date: August 12, 2021Applicant: TC1 LLCInventors: Masamichi Yanai, Shunzhou Yu, Tao Zhang
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Patent number: 11015605Abstract: A blood pump system includes a pump housing and an impeller for rotating in a pump chamber within the housing. The impeller has a first side and a second side opposite the first side. The system includes a stator having drive coils for applying a torque to the impeller and at least one bearing mechanism for suspending the impeller within the pump chamber. The system includes a position control mechanism for moving the impeller in an axial direction within the pump chamber to adjust a size of a first gap and a size of a second gap, thereby controlling a washout rate at each of the first gap and the second gap. The first gap is defined by a distance between the first side and the housing and the second gap is defined by a distance between the second side and the pump housing.Type: GrantFiled: June 17, 2019Date of Patent: May 25, 2021Assignee: TC1 LLCInventors: Masamichi Yanai, Shunzhou Yu, Tao Zhang
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Patent number: 10980928Abstract: A blood pump system is implantable in a patient for ventricular support. A pumping chamber has an inlet for receiving blood from a ventricle of the patient. An impeller is received in the pumping chamber. A motor is coupled to the impeller for driving rotation of the impeller. A motor controller is provided for tracking systolic and diastolic phases of a cardiac cycle of the patient and supplying a variable voltage signal to the motor in a variable speed mode to produce a variable impeller speed linked to the cardiac cycle. The impeller speed comprises a ramping up to an elevated speed during the diastolic phase in order to reduce a load on the ventricle at the beginning of the systolic phase.Type: GrantFiled: September 20, 2019Date of Patent: April 20, 2021Assignee: TC1 LLCInventors: Alexander Medvedev, Masamichi Yanai
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Publication number: 20200009307Abstract: A blood pump system is implantable in a patient for ventricular support. A pumping chamber has an inlet for receiving blood from a ventricle of the patient. An impeller is received in the pumping chamber. A motor is coupled to the impeller for driving rotation of the impeller. A motor controller is provided for tracking systolic and diastolic phases of a cardiac cycle of the patient and supplying a variable voltage signal to the motor in a variable speed mode to produce a variable impeller speed linked to the cardiac cycle. The impeller speed comprises a ramping up to an elevated speed during the diastolic phase in order to reduce a load on the ventricle at the beginning of the systolic phase.Type: ApplicationFiled: September 20, 2019Publication date: January 9, 2020Inventors: Alexander Medvedev, Masamichi Yanai
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Patent number: 10456513Abstract: A blood pump system is implantable in a patient for ventricular support. A pumping chamber has an inlet for receiving blood from a ventricle of the patient. An impeller is received in the pumping chamber. A motor is coupled to the impeller for driving rotation of the impeller. A motor controller is provided for tracking systolic and diastolic phases of a cardiac cycle of the patient and supplying a variable voltage signal to the motor in a variable speed mode to produce a variable impeller speed linked to the cardiac cycle. The impeller speed comprises a ramping up to an elevated speed during the diastolic phase in order to reduce a load on the ventricle at the beginning of the systolic phase.Type: GrantFiled: June 30, 2017Date of Patent: October 29, 2019Assignee: TC1 LLCInventors: Alexander Medvedev, Masamichi Yanai
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Publication number: 20190301467Abstract: A blood pump system includes a pump housing and an impeller for rotating in a pump chamber within the housing. The impeller has a first side and a second side opposite the first side. The system includes a stator having drive coils for applying a torque to the impeller and at least one bearing mechanism for suspending the impeller within the pump chamber. The system includes a position control mechanism for moving the impeller in an axial direction within the pump chamber to adjust a size of a first gap and a size of a second gap, thereby controlling a washout rate at each of the first gap and the second gap. The first gap is defined by a distance between the first side and the housing and the second gap is defined by a distance between the second side and the pump housing.Type: ApplicationFiled: June 17, 2019Publication date: October 3, 2019Applicant: TC1 LLCInventors: Masamichi Yanai, Shunzhou Yu, Tao Zhang
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Patent number: 10405840Abstract: A surgical fixing tool for vascular anastomosis inhibits an operation site on a surface of a living body such as a heart from moving along a height direction of the surface of the living body. The fixing tool has a position adjusting unit disposed in a support unit 10 that adjusts a relative position between the support unit and the fixed living body local site. A displacement position detection unit detects a displacement position of a local site. Based on a detected displacement, the position adjusting unit changes and adjusts a relative position between the support unit and the fixed local site.Type: GrantFiled: June 23, 2016Date of Patent: September 10, 2019Assignee: TERUMO KABUSHIKI KAISHAInventors: Takeshi Tsubouchi, Masamichi Yanai
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Patent number: 10371152Abstract: A blood pump system includes a pump housing and an impeller for rotating in a pump chamber within the housing. The impeller has a first side and a second side opposite the first side. The system includes a stator having drive coils for applying a torque to the impeller and at least one bearing mechanism for suspending the impeller within the pump chamber. The system includes a position control mechanism for moving the impeller in an axial direction within the pump chamber to adjust a size of a first gap and a size of a second gap, thereby controlling a washout rate at each of the first gap and the second gap. The first gap is defined by a distance between the first side and the housing and the second gap is defined by a distance between the second side and the pump housing.Type: GrantFiled: February 11, 2016Date of Patent: August 6, 2019Assignee: TC1 LLCInventors: Masamichi Yanai, Shunzhou Yu, Tao Zhang
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Publication number: 20190167876Abstract: A centrifugal blood pump includes a housing that defines an inlet passage, a chamber, and an outlet passage. The pump includes an impeller rotatably positioned in the chamber to transfer blood from the inlet passage through the chamber and to the outlet passage and magnetic members embedded in the impeller such that the impeller and the magnetic members rotate together within the chamber. The pump includes a motor to control movement of the impeller in the chamber. The motor is adjacent the chamber and separated from the chamber by a partition member. The pump includes an inner annular magnetic member and an outer annular magnetic member embedded in a side of the housing opposite the partition member. A first net magnetic force between the inner annular magnetic member and the magnetic members exhibits greater attraction than a second net magnetic force between the outer annular member and the magnetic members.Type: ApplicationFiled: February 5, 2019Publication date: June 6, 2019Applicant: TC1 LLCInventors: Masamichi Yanai, Jason Nanna
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Patent number: 10245361Abstract: A centrifugal blood pump includes a housing that defines an inlet passage, a chamber, and an outlet passage. The pump includes an impeller rotatably positioned in the chamber to transfer blood from the inlet passage through the chamber and to the outlet passage and magnetic members embedded in the impeller such that the impeller and the magnetic members rotate together within the chamber. The pump includes a motor to control movement of the impeller in the chamber. The motor is adjacent the chamber and separated from the chamber by a partition member. The pump includes an inner annular magnetic member and an outer annular magnetic member embedded in a side of the housing opposite the partition member. A first net magnetic force between the inner annular magnetic member and the magnetic members exhibits greater attraction than a second net magnetic force between the outer annular member and the magnetic members.Type: GrantFiled: February 12, 2016Date of Patent: April 2, 2019Assignee: TC1 LLCInventors: Masamichi Yanai, Jason Nanna
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Publication number: 20180008759Abstract: A blood pump system is implantable in a patient for ventricular support. A pumping chamber has an inlet for receiving blood from a ventricle of the patient. An impeller is received in the pumping chamber. A motor is coupled to the impeller for driving rotation of the impeller. A motor controller is provided for tracking systolic and diastolic phases of a cardiac cycle of the patient and supplying a variable voltage signal to the motor in a variable speed mode to produce a variable impeller speed linked to the cardiac cycle. The impeller speed comprises a ramping up to an elevated speed during the diastolic phase in order to reduce a load on the ventricle at the beginning of the systolic phase.Type: ApplicationFiled: June 30, 2017Publication date: January 11, 2018Inventors: Alexander Medvedev, Masamichi Yanai