Patents by Inventor Masakazu Shimoyama
Masakazu Shimoyama 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: 20200282188Abstract: A drug layer applying device and a method for forming a drug layer which can quickly and easily place an appropriate amount of a drug on a surface of a medical instrument. A drug layer applying device that is used by being inserted into a living body and attachable to a balloon, includes: a flexible sheet; and a drug layer provided on one surface of the sheet.Type: ApplicationFiled: May 20, 2020Publication date: September 10, 2020Applicant: TERUMO KABUSHIKI KAISHAInventors: Yuno KITAGAWA, Yasuo KUROSAKI, Hiroshi GOTO, Masakazu SHIMOYAMA
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Patent number: 10064748Abstract: A stent delivery system is disclosed in which a stent is contained in a sheath in an initial state and the stent is released inside a living body lumen in accordance with a movement of the sheath in a proximal direction with respect to an inner member. A movement mechanism of the stent delivery system has a rack member which is connected to a proximal end of the sheath, and a plurality of pinions which move the rack member in accordance with rotations thereof.Type: GrantFiled: January 21, 2016Date of Patent: September 4, 2018Assignee: TERUMO KABUSHIKI KAISHAInventor: Masakazu Shimoyama
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Patent number: 9492298Abstract: An operating unit in a stent delivery system comprises a displacement body including a first body connected to an outer tube body and a second body which is connected to the first body and meshed with a rotary roller. A first connection surface of the first body is formed with a first convex portion and a first concave portion recessed relative to the first convex portion. The first convex portion engages a second concave portion of the second body and a second convex portion engages the first concave portion. When movement of the displacement body becomes difficult for some reason and the operator forcibly rotates the rotary roller, the engaged state of the second body and the first body is released and the second body is relatively moved, thus preventing movement of the first body in the axial direction.Type: GrantFiled: July 31, 2014Date of Patent: November 15, 2016Assignee: TERUMO KABUSHIKI KAISHAInventor: Masakazu Shimoyama
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Patent number: 9452071Abstract: A stent delivery system includes a housing that houses a rotary roller, a support body in sliding contact with the outer surface of the rotary roller, and a resilient member composed of a coil spring acting on the support body. If, for any reason, it becomes difficult to axially move a rack member and an operator forcibly rotates the rotary roller, a load of not less than a predetermined value is applied to the rotary roller and the rotary roller moves downward while the support body is being pushed down, and meshing engagement between the rack member and the rotary roller is released. Axial movement of the rack member is thus avoided as there is no transmission of the rotating force of the rotary roller to the rack member. Other embodiments are also disclosed for preventing transmission of the rotating force of the rotary roller to the rack member.Type: GrantFiled: July 22, 2013Date of Patent: September 27, 2016Assignee: TERUMO KABUSHIKI KAISHAInventor: Masakazu Shimoyama
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Publication number: 20160135975Abstract: A stent delivery system is disclosed in which a stent is contained in a sheath in an initial state and the stent is released inside a living body lumen in accordance with a movement of the sheath in a proximal direction with respect to an inner member. A movement mechanism of the stent delivery system has a rack member which is connected to a proximal end of the sheath, and a plurality of pinions which move the rack member in accordance with rotations thereof.Type: ApplicationFiled: January 21, 2016Publication date: May 19, 2016Applicant: TERUMO KABUSHIKI KAISHAInventor: Masakazu Shimoyama
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Publication number: 20140343660Abstract: An operating unit in a stent delivery system comprises a displacement body including a first body connected to an outer tube body and a second body which is connected to the first body and meshed with a rotary roller. A first connection surface of the first body is formed with a first convex portion and a first concave portion recessed relative to the first convex portion. The first convex portion engages a second concave portion of the second body and a second convex portion engages the first concave portion. When movement of the displacement body becomes difficult for some reason and the operator forcibly rotates the rotary roller, the engaged state of the second body and the first body is released and the second body is relatively moved, thus preventing movement of the first body in the axial direction.Type: ApplicationFiled: July 31, 2014Publication date: November 20, 2014Applicant: TERUMO KABUSHIKI KAISHAInventor: Masakazu SHIMOYAMA
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Publication number: 20130304189Abstract: A stent delivery system includes a housing that houses a rotary roller, a support body in sliding contact with the outer surface of the rotary roller, and a resilient member composed of a coil spring acting on the support body. If, for any reason, it becomes difficult to axially move a rack member and an operator forcibly rotates the rotary roller, a load of not less than a predetermined value is applied to the rotary roller and the rotary roller moves downward while the support body is being pushed down, and meshing engagement between the rack member and the rotary roller is released. Axial movement of the rack member is thus avoided as there is no transmission of the rotating force of the rotary roller to the rack member. Other embodiments are also disclosed for preventing transmission of the rotating force of the rotary roller to the rack member.Type: ApplicationFiled: July 22, 2013Publication date: November 14, 2013Applicant: TERUMO KABUSHIKI KAISHAInventor: Masakazu SHIMOYAMA
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Publication number: 20120082706Abstract: A medical device for safe and sure delivery of drugs to the lesion and a method for production thereof. The medical device has at least part of its surface in contact with the lumen wall tissue of the living body coated with a drug releasing layer containing a drug and a phospholipid, the drug and the phospholipid forming a solid dispersion.Type: ApplicationFiled: December 15, 2011Publication date: April 5, 2012Applicant: TERUMO KABUSHIKI KAISHAInventors: Yuuji Nakagawa, Masakazu Shimoyama