Patents by Inventor Toshihiro Yamagata
Toshihiro Yamagata 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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Patent number: 11971327Abstract: A blowby gas treatment device includes a pressure control valve, a fresh air induction pipe, a first blowby gas pipe, a second blowby gas pipe, a shutoff valve, a one-way valve, and a PCV valve. A leak diagnosis includes a first-stage diagnosis to determine whether or not falling of a pressure in a crank case after closing of the shutoff valve under a non-supercharging condition is normal. A second-stage diagnosis is implemented by using an air fuel ratio feedback control, and determining whether or not a sensed intake air quantity obtained by an air flow meter is equal to an actual intake air quantity flowing into a cylinder set. When the sensed intake air quantity is equal to the actual intake air quantity, presence of an in-system leak is determined, and when the actual intake air quantity is larger, presence of an out-of-system leak is determined.Type: GrantFiled: June 2, 2020Date of Patent: April 30, 2024Assignee: NISSAN MOTOR CO., LTD.Inventors: Toshihiro Yamagata, Akihito Takahashi, Shimpei Yamashita
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Patent number: 11624676Abstract: A blowby gas treatment device includes a pressure control valve, a fresh air induction pipe, a first blowby gas pipe, a second blowby gas pipe, a shutoff valve, a one-way valve, and a PCV valve. A leak diagnosis includes a first-stage diagnosis to determine whether or not falling of a pressure in a crank case after closing of the shutoff valve under a non-supercharging condition is normal. A second-stage diagnosis is implemented by moving the pressure control valve from a fully opened state into a fully closed state, and determining whether an intake air quantity in each state is equal to each other. When the intake air quantity in each state is equal to each other, presence of an in-system leak is determined. When a fully closed state intake air quantity is different from a fully opened state intake air quantity, presence of an out-of-system leak is determined.Type: GrantFiled: June 2, 2020Date of Patent: April 11, 2023Assignee: NISSAN MOTOR CO., LTD.Inventors: Toshihiro Yamagata, Akihito Takahashi, Shimpei Yamashita
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Publication number: 20220291074Abstract: A blowby gas treatment device includes a pressure control valve, a fresh air induction pipe, a first blowby gas pipe, a second blowby gas pipe, a shutoff valve, a one-way valve, and a PCV valve. A leak diagnosis includes a first-stage diagnosis to determine whether or not falling of a pressure in a crank case after closing of the shutoff valve under a non-supercharging condition is normal. A second-stage diagnosis is implemented by moving the pressure control valve from a fully opened state into a fully closed state, and determining whether an intake air quantity in each state is equal to each other. When the intake air quantity in each state is equal to each other, presence of an in-system leak is determined. When a fully closed state intake air quantity is different from a fully opened state intake air quantity, presence of an out-of-system leak is determined.Type: ApplicationFiled: June 2, 2020Publication date: September 15, 2022Applicant: NISSAN MOTOR CO., LTD.Inventors: Toshihiro YAMAGATA, Akihito TAKAHASHI, Shimpei YAMASHITA
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Publication number: 20220276113Abstract: A blowby gas treatment device includes a pressure control valve, a fresh air induction pipe, a first blowby gas pipe, a second blowby gas pipe, a shutoff valve, a one-way valve, and a PCV valve. A leak diagnosis includes a first-stage diagnosis to determine whether or not falling of a pressure in a crank case after closing of the shutoff valve under a non-supercharging condition is normal. A second-stage diagnosis is implemented by using an air fuel ratio feedback control, and determining whether or not a sensed intake air quantity obtained by an air flow meter is equal to an actual intake air quantity flowing into a cylinder set. When the sensed intake air quantity is equal to the actual intake air quantity, presence of an in-system leak is determined, and when the actual intake air quantity is larger, presence of an out-of-system leak is determined.Type: ApplicationFiled: June 2, 2020Publication date: September 1, 2022Applicant: NISSAN MOTOR CO., LTD.Inventors: Toshihiro YAMAGATA, Akihito TAKAHASHI, Shimpei YAMASHITA
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Publication number: 20220192852Abstract: A stent delivery device for delivering a self-expanding stent comprises an inner sheath including a proximal end portion and a distal end portion, a stent stopper including a stopper main body that is circumferentially disposed over at least a portion of the inner sheath at the proximal end portion, and at least one projection extending radially outward from the stopper main body for releasably engaging a portion of the self-expanding stent, and an outer sheath slidably disposed over the inner sheath and the stent stopper. The at least one projection includes a distal end surface and a proximal end surface, and the proximal end surface includes a recess extending into a body of the projection toward the distal end surface.Type: ApplicationFiled: December 15, 2021Publication date: June 23, 2022Applicant: OLYMPUS CORPORATIONInventors: Taihei ONISHI, Toshihiro YAMAGATA, Hirofumi TANIGUCHI
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Publication number: 20210267778Abstract: A medical stent including: a tubular main body made of resin that extends along an axis; a first locking member including a first fixed end fixed to the distal end side of the main body, and a first free end positioned radially outward of the main body; a second locking member including a second fixed end fixed to the proximal end side of the main body, and a second free end positioned radially outward of the main body; and a spiral reinforcing material made of metal which is embedded between the inner and outer circumferential surfaces of the main body. The reinforcing material includes a first portion spirally wound between the first and second fixed ends, a second portion spirally wound at a pitch greater than that of the first portion, and a third portion spirally wound at a pitch greater than that of the second portion.Type: ApplicationFiled: May 18, 2021Publication date: September 2, 2021Applicant: OLYMPUS CORPORATIONInventors: Ryosuke SAKAI, Toshihiro YAMAGATA, Kazuhiro NODA, Yuko KIRINO, Nozomu KOTAKE
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Publication number: 20210130658Abstract: Disclosed in an adhesive tape having an adhesive layer containing a conductive filler on both sides of a conductive base, wherein the ratio (B/A) of the total thickness (B) of the adhesive layers to the thickness (A) of the conductive base is less than 2 and the content of the conductive filler is 45 parts by mass or more with respect to 100 parts by mass of the resin component of the adhesive layer. This adhesive tape has flame retardancy that passes UL94 HB (horizontal burning test) even if the adhesive layer does not contain a flame retardant, and further, is excellent also in thermal conductivity and adhesiveness.Type: ApplicationFiled: October 31, 2017Publication date: May 6, 2021Inventor: Toshihiro YAMAGATA
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Patent number: 10383719Abstract: A stent for medical use includes: a main body which includes a first rigid portion formed in a tubular shape along a longitudinal axis and having a predetermined rigidity with respect to a compression force exerted in a radial direction and a second rigid portion having a rigidity less than that of the first rigid portion, the second rigid portion which is substantially coaxial with and continues to a proximal end of the first rigid portion, and the second rigid portion which formed in a tubular shape along the longitudinal axis; and a gripping target region which is provided on an outer circumferential surface of the second rigid portion and is gripped by a gripping tool when the main body is led into a channel of an endoscope.Type: GrantFiled: January 26, 2017Date of Patent: August 20, 2019Assignee: OLYMPUS CORPORATIONInventors: Yusuke Nomura, Toshihiro Yamagata, Madoka Kiyokawa
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Patent number: 10188270Abstract: A stent delivery system includes a guide catheter, a tubular stent into which the guide catheter can be inserted, and a tubular pusher catheter into which the guide catheter can be inserted and disposed nearer to a proximal end side than the stent. The pusher catheter includes a diameter expansion-suppressing part provided at a distal end part and having the same inner diameter as the stent and an intermediate part provided at a proximal end side of the diameter expansion-suppressing part and having a bending stiffness less than that of the diameter expansion-suppressing part. When the stent is pushed toward a distal end side by pushing the intermediate part of the pusher catheter toward the distal end side and bringing a distal end part of the diameter expansion-suppressing part into contact with a proximal end part of the stent, an inner diameter of the pusher catheter is prevented from expanding.Type: GrantFiled: September 17, 2016Date of Patent: January 29, 2019Assignee: OLYMPUS CORPORATIONInventors: Hiromichi Miyano, Toshihiro Yamagata
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Publication number: 20170128188Abstract: A stent for medical use includes: a main body which includes a first rigid portion formed in a tubular shape along a longitudinal axis and having a predetermined rigidity with respect to a compression force exerted in a radial direction and a second rigid portion having a rigidity less than that of the first rigid portion, the second rigid portion which is substantially coaxial with and continues to a proximal end of the first rigid portion, and the second rigid portion which formed in a tubular shape along the longitudinal axis; and a gripping target region which is provided on an outer circumferential surface of the second rigid portion and is gripped by a gripping tool when the main body is led into a channel of an endoscope.Type: ApplicationFiled: January 26, 2017Publication date: May 11, 2017Applicant: OLYMPUS CORPORATIONInventors: Yusuke NOMURA, Toshihiro YAMAGATA, Madoka KIYOKAWA
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Patent number: 9585772Abstract: A stent for medical use includes: a main body which includes a first rigid portion formed in a tubular shape along a longitudinal axis and having a predetermined rigidity with respect to a compression force exerted in a radial direction and a second rigid portion having a rigidity less than that of the first rigid portion, the second rigid portion which is substantially coaxial with and continues to a proximal end of the first rigid portion, and the second rigid portion which formed in a tubular shape along the longitudinal axis; and a gripping target region which is provided on an outer circumferential surface of the second rigid portion and is gripped by a gripping tool when the main body is led into a channel of an endoscope.Type: GrantFiled: June 27, 2014Date of Patent: March 7, 2017Assignee: OLYMPUS CORPORATIONInventors: Yusuke Nomura, Toshihiro Yamagata, Madoka Kiyokawa
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Publication number: 20170000318Abstract: A stent delivery system includes a guide catheter, a tubular stent into which the guide catheter can be inserted, and a tubular pusher catheter into which the guide catheter can be inserted and disposed nearer to a proximal end side than the stent. The pusher catheter includes a diameter expansion-suppressing part provided at a distal end part and having the same inner diameter as the stent and an intermediate part provided at a proximal end side of the diameter expansion-suppressing part and having a bending stiffness less than that of the diameter expansion-suppressing part. When the stent is pushed toward a distal end side by pushing the intermediate part of the pusher catheter toward the distal end side and bringing a distal end part of the diameter expansion-suppressing part into contact with a proximal end part of the stent, an inner diameter of the pusher catheter is prevented from expanding.Type: ApplicationFiled: September 17, 2016Publication date: January 5, 2017Applicant: OLYMPUS CORPORATIONInventors: Hiromichi MIYANO, Toshihiro YAMAGATA
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Publication number: 20170000311Abstract: A stent delivery system includes a guide catheter, a stent into which the guide catheter can be inserted, and a pusher catheter into which the guide catheter can be inserted and disposed in a proximal end side relative to the stent. The guide catheter has a guide catheter tip portion protruding to a distal end side further than the stent when the guide catheter is inserted into the stern and the pusher catheter, and a guide catheter body disposed at least partially in the passages of the stent and the pusher catheter. The stent has flexural rigidity equal to or lower than that of the guide catheter body, and the stent mounted region has flexural rigidity equal to or lower than that of the pusher mounted region.Type: ApplicationFiled: September 17, 2016Publication date: January 5, 2017Applicant: OLYMPUS CORPORATIONInventors: Toshihiro YAMAGATA, Hiromichi MIYANO
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Patent number: 9192493Abstract: A medical stent comprising a coil formed by winding a wire around an axis, an outer layer formed substantially tubular made from a first resin material, provided on an outer peripheral side of said coil and coaxial to said coil, and an inner layer formed substantially tubular made from a second resin material, provided on an inner peripheral side of said coil and coaxial to said coil.Type: GrantFiled: December 23, 2013Date of Patent: November 24, 2015Assignee: OLYMPUS CORPORATIONInventor: Toshihiro Yamagata
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Publication number: 20150005894Abstract: A stent for medical use includes: a main body which includes a first rigid portion formed in a tubular shape along a longitudinal axis and having a predetermined rigidity with respect to a compression force exerted in a radial direction and a second rigid portion having a rigidity less than that of the first rigid portion, the second rigid portion which is substantially coaxial with and continues to a proximal end of the first rigid portion, and the second rigid portion which formed in a tubular shape along the longitudinal axis; and a gripping target region which is provided on an outer circumferential surface of the second rigid portion and is gripped by a gripping tool when the main body is led into a channel of an endoscope.Type: ApplicationFiled: June 27, 2014Publication date: January 1, 2015Inventors: Yusuke NOMURA, Toshihiro YAMAGATA, Madoka KIYOKAWA
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Publication number: 20140114431Abstract: A medical stent comprising a coil formed by winding a wire around an axis, an outer layer formed substantially tubular made from a first resin material, provided on an outer peripheral side of said coil and coaxial to said coil, and an inner layer formed substantially tubular made from a second resin material, provided on an inner peripheral side of said coil and coaxial to said coil.Type: ApplicationFiled: December 23, 2013Publication date: April 24, 2014Applicant: OLYMPUS MEDICAL SYSTEMS CORP.Inventor: Toshihiro YAMAGATA
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Patent number: 8685081Abstract: The medical stent includes: a main body formed into an approximately tubular shape along a longitudinal axis with a first resin material; an elastic member formed of a second resin material which is larger in flexural modulus than the first resin material, and configured to have one end portion connected to an end portion of the main body and the other end portion formed to extend to the central portion side of the main body along the longitudinal axis and also to direct to the radial direction of the main body; and a treated layer formed between the end portion of the main body and the one end portion of the elastic member and configured to have a functional group for joining the end portion of the main body and the one end portion of the elastic member to each other.Type: GrantFiled: May 30, 2012Date of Patent: April 1, 2014Assignee: Olympus Medical Systems Corp.Inventor: Toshihiro Yamagata
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Patent number: 8632606Abstract: A medical stent comprising a coil formed by winding a wire around an axis, an outer layer formed substantially tubular made from a first resin material, provided on an outer peripheral side of said coil and coaxial to said coil, and an inner layer formed substantially tubular made from a second resin material, provided on an inner peripheral side of said coil and coaxial to said coil.Type: GrantFiled: September 26, 2011Date of Patent: January 21, 2014Assignee: Olympus Medical Systems Corp.Inventor: Toshihiro Yamagata
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Publication number: 20120330433Abstract: The medical stent includes: a main body formed into an approximately tubular shape along a longitudinal axis with a first resin material; an elastic member formed of a second resin material which is larger in flexural modulus than the first resin material, and configured to have one end portion connected to an end portion of the main body and the other end portion formed to extend to the central portion side of the main body along the longitudinal axis and also to direct to the radial direction of the main body; and a treated layer formed between the end portion of the main body and the one end portion of the elastic member and configured to have a functional group for joining the end portion of the main body and the one end portion of the elastic member to each other.Type: ApplicationFiled: May 30, 2012Publication date: December 27, 2012Applicant: OLYMPUS MEDICAL SYSTEMS CORP.Inventor: Toshihiro YAMAGATA
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Patent number: D952854Type: GrantFiled: February 28, 2019Date of Patent: May 24, 2022Assignee: OLYMPUS CORPORATIONInventors: Toshihiro Yamagata, Aya Mori, Miho Naka, Nao Tsuruta, Yoshino Nagasuka