Patents by Inventor Takeharu KATSURADA
Takeharu KATSURADA 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: 20240082551Abstract: A catheter includes a hollow catheter shaft, and a distal tip connected to a distal end portion of the catheter shaft. A recess is formed in the distal end portion of the catheter shaft, and a proximal end portion of the distal tip is inserted into the recess. According to this catheter, joint strength of the distal tip and the catheter shaft can be enhanced.Type: ApplicationFiled: October 17, 2023Publication date: March 14, 2024Applicant: ASAHI INTECC CO., LTD.Inventors: Moritaka OGIDO, Yutaka ERIKAWA, Takeharu KATSURADA
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Publication number: 20230129088Abstract: A catheter includes a hollow shaft and an outer shaft arranged at an outer periphery of the hollow shaft. The hollow shaft includes a reinforcing body having a plurality of slits extending spirally. Proximal ends of the slits are at a same axial position and at equal intervals in a circumferential direction.Type: ApplicationFiled: December 22, 2022Publication date: April 27, 2023Applicant: Asahi Intecc Co., Ltd.Inventor: Takeharu KATSURADA
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Patent number: 11633567Abstract: A catheter includes a tubular inner layer, a reinforcement body disposed around the outer periphery of the inner layer, a protective layer covering the outer periphery of an end of the reinforcement body, and an outer layer covering at least the outer periphery of the protective layer. The protective layer covers the outer periphery of at least one end of reinforcement body, and the end of the reinforcement body covered with the protective layer is buried deeper in a side of the inner layer relative to a portion of the reinforcement body not covered with protective layer. The reinforcement body is prevented from lifting away from the inner layer when the catheter is bent even without increasing the outer diameter of the reinforcement body.Type: GrantFiled: April 10, 2020Date of Patent: April 25, 2023Assignee: ASAHI INTECC CO., LTD.Inventors: Yuta Kubo, Takeharu Katsurada, Moritaka Ogido
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Publication number: 20220088354Abstract: A balloon catheter includes a tubular inner shaft, a balloon partly covering the inner shaft and having a distal end joined to the inner shaft, and a tubular outer shaft accommodating a part of the inner shaft. The outer shaft includes a balloon joint joined to a base end of the balloon and a reduced diameter area being accommodated in the balloon and having a smaller outer diameter than the balloon joint part, and is joined to the inner shaft in the balloon. A communication hole provides a flow path between the expansion lumen and the inside of the balloon. In the balloon, an outer diameter on the outermost periphery of a structure formed by the inner shaft, the X-ray opaque marker, and the outer shaft decreases continuously or stepwise from the base end toward the distal end of the balloon.Type: ApplicationFiled: December 8, 2021Publication date: March 24, 2022Applicant: Asahi Intecc Co., Ltd.Inventor: Takeharu KATSURADA
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Patent number: 11065423Abstract: A balloon catheter includes an inner shaft with a distal variant portion and a proximal variant portion. A bulged portion is provided at the distal end of a reinforcement member, and the bulged portion is configured to move in an axial direction between the distal variant portion and the proximal variant portion. Thus, the balloon catheter may smoothly pass through a curved blood vessel with improved kink resistance of the reinforcement member.Type: GrantFiled: June 12, 2018Date of Patent: July 20, 2021Assignee: ASAHI INTECC CO., LTD.Inventors: Kazuteru Segi, Takeharu Katsurada, Yuta Kubo
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Patent number: 10933220Abstract: A balloon catheter includes a balloon and an inner shaft. The inner shaft includes a marker member arranged on an outer periphery of a coil body having a sparsely wound portion in which gaps are formed between adjacent windings of the wire of the coil body. A distal end part and a proximal end part of the marker member are arranged at a position facing a void formed within one of the gaps between the adjacent windings of the wire of the coil body. The inner shaft of the balloon catheter therefore will not buckle, preventing damage to the balloon by contact with the marker member when the balloon catheter is passed through the inside of a curved blood vessel.Type: GrantFiled: February 7, 2019Date of Patent: March 2, 2021Assignee: ASAHI INTECC CO., LTD.Inventors: Takeharu Katsurada, Takeshi Mogi
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Patent number: 10888341Abstract: A balloon catheter prevents detachment of a balloon from an inner shaft without using a conventional sleeve or heat-shrinkable tube. The balloon catheter includes a balloon, an inner shaft, and a tip having a proximal end portion that covers an outer periphery of a distal end of the balloon. The distal end of the balloon is sandwiched between the inner shaft and the proximal end portion of the tip, thereby joining the distal end of the balloon to the inner shaft and the tip.Type: GrantFiled: July 24, 2018Date of Patent: January 12, 2021Assignee: ASAHI INTECC CO., LTD.Inventors: Takeharu Katsurada, Yuta Kubo, Moritaka Ogido
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Publication number: 20200276413Abstract: A catheter comprises a catheter body and a distal tip joined to a distal end of the catheter body and made of a resin including tungsten powder, wherein the distal tip includes a distal region and a proximal region disposed in a proximal side of the distal region, and a hardness of the distal region is higher than a hardness of the proximal region.Type: ApplicationFiled: May 19, 2020Publication date: September 3, 2020Applicant: ASAHI INTECC CO., LTD.Inventors: Takeharu KATSURADA, Moritaka OGIDO
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Publication number: 20200238049Abstract: A catheter includes a tubular inner layer, a reinforcement body disposed around the outer periphery of the inner layer, a protective layer covering the outer periphery of an end of the reinforcement body, and an outer layer covering at least the outer periphery of the protective layer. The protective layer covers the outer periphery of at least one end of reinforcement body, and the end of the reinforcement body covered with the protective layer is buried deeper in a side of the inner layer relative to a portion of the reinforcement body not covered with protective layer. The reinforcement body is prevented from lifting away from the inner layer when the catheter is bent even without increasing the outer diameter of the reinforcement body.Type: ApplicationFiled: April 10, 2020Publication date: July 30, 2020Applicant: ASAHI INTECC CO., LTD.Inventors: Yuta KUBO, Takeharu KATSURADA, Moritaka OGIDO
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Publication number: 20200238057Abstract: A balloon catheter comprises a balloon, an outer tube connected to a proximal end of the balloon, an inner tube disposed inside the outer tube and having a distal end attached to a distal end of the balloon, a protruded-depressed portion formed on an outer periphery of the inner tube, and a core wire disposed between the outer tube and the inner tube. The core wire has a bulged portion sandwiched between the outer tube and a depressed portion of the protruded-depressed portion. The balloon catheter can transmit a force from the core wire to both the outer tube and the inner tube regardless of whether the force is generated by pushing or pulling a proximal end portion of the balloon catheter. Additionally, the core wire can move appropriately to maintain the flexibility of the balloon catheter even when the balloon catheter bends.Type: ApplicationFiled: April 15, 2020Publication date: July 30, 2020Applicant: ASAHI INTECC CO., LTD.Inventors: Takeharu KATSURADA, Takeshi MOGI
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Patent number: 10722682Abstract: A catheter includes an inner layer, a reinforcement layer at least partially inside the inner layer or on an outer periphery of the inner layer, and an outer layer covering the inner layer and the reinforcement layer. The reinforcement layer has a wire wound so that a gap is present between adjacent portions of the wire. The inner layer has an uneven outer peripheral surface on which a protruded portion is formed in a location of the wire, and in which a depressed portion is formed in a location of the gap. The outer layer has a protrusion part that extends into the depressed portion of the inner layer, the protrusion part entering deeper than the reinforcement layer through the gap and extending in an axial direction of the catheter. The outer layer is not easily detached from the inner layer.Type: GrantFiled: March 23, 2017Date of Patent: July 28, 2020Assignee: ASAHI INTECC CO., LTD.Inventors: Yuta Kubo, Moritaka Ogido, Takeharu Katsurada
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Patent number: 10653858Abstract: A catheter includes a tubular inner layer, a reinforcement body disposed around the outer periphery of the inner layer, a protective layer covering the outer periphery of an end of the reinforcement body, and an outer layer covering at least the outer periphery of the protective layer. The protective layer covers the outer periphery of at least one end of reinforcement body, and the end of the reinforcement body covered with the protective layer is buried deeper in a side of the inner layer relative to a portion of the reinforcement body not covered with protective layer. The reinforcement body is prevented from lifting away from the inner layer when the catheter is bent even without increasing the outer diameter of the reinforcement body.Type: GrantFiled: July 7, 2016Date of Patent: May 19, 2020Assignee: ASAHI INTECC CO., LTD.Inventors: Yuta Kubo, Takeharu Katsurada, Moritaka Ogido
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Patent number: 10653869Abstract: A balloon catheter comprises a balloon, an outer tube connected to a proximal end of the balloon, an inner tube disposed inside the outer tube and having a distal end attached to a distal end of the balloon, a protruded-depressed portion formed on an outer periphery of the inner tube, and a core wire disposed between the outer tube and the inner tube. The core wire has a bulged portion sandwiched between the outer tube and a depressed portion of the protruded-depressed portion. The balloon catheter can transmit a force from the core wire to both the outer tube and the inner tube regardless of whether the force is generated by pushing or pulling a proximal end portion of the balloon catheter. Additionally, the core wire can move appropriately to maintain the flexibility of the balloon catheter even when the balloon catheter bends.Type: GrantFiled: January 22, 2018Date of Patent: May 19, 2020Assignee: ASAHI INTECC CO., LTD.Inventors: Takeharu Katsurada, Takeshi Mogi
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Patent number: 10617855Abstract: A balloon catheter includes a balloon, an inner shaft, an outer shaft, and a reinforcing member that includes a protruded part that contacts with an inner surface of the outer shaft and an outer surface of the inner shaft. A pushing force of an operator can be evenly transmitted to the outer shaft and the inner shaft from the distal end of the reinforcing member, reducing a relative displacement of the outer shaft and the inner shaft.Type: GrantFiled: February 15, 2018Date of Patent: April 14, 2020Assignee: ASAHI INTECC CO., LTD.Inventors: Manabu Shimogami, Takeharu Katsurada
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Publication number: 20190167947Abstract: A balloon catheter includes a balloon and an inner shaft. The inner shaft includes a marker member arranged on an outer periphery of a coil body having a sparsely wound portion in which gaps are formed between adjacent windings of the wire of the coil body. A distal end part and a proximal end part of the marker member are arranged at a position facing a void formed within one of the gaps between the adjacent windings of the wire of the coil body. The inner shaft of the balloon catheter therefore will not buckle, preventing damage to the balloon by contact with the marker member when the balloon catheter is passed through the inside of a curved blood vessel.Type: ApplicationFiled: February 7, 2019Publication date: June 6, 2019Applicant: ASAHI INTECC CO., LTD.Inventors: Takeharu KATSURADA, Takeshi MOGI
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Patent number: 10252028Abstract: A balloon catheter includes a balloon and an inner shaft. The inner shaft includes a marker member arranged on an outer periphery of a coil body having a sparsely wound portion in which gaps are formed between adjacent windings of the wire of the coil body. A distal end part and a proximal end part of the marker member are arranged at a position facing a void formed within one of the gaps between the adjacent windings of the wire of the coil body. The inner shaft of the balloon catheter therefore will not buckle, preventing damage to the balloon by contact with the marker member when the balloon catheter is passed through the inside of a curved blood vessel.Type: GrantFiled: December 15, 2015Date of Patent: April 9, 2019Assignee: ASAHI INTECC CO., LTD.Inventors: Takeharu Katsurada, Takeshi Mogi
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Patent number: 10136905Abstract: A balloon catheter prevents detachment of a balloon from an inner shaft without using a conventional sleeve or heat-shrinkable tube. The balloon catheter includes a balloon, an inner shaft, and a tip having a proximal end portion that covers an outer periphery of a distal end of the balloon. The distal end of the balloon is sandwiched between the inner shaft and the proximal end portion of the tip, thereby joining the distal end of the balloon to the inner shaft and the tip.Type: GrantFiled: June 30, 2016Date of Patent: November 27, 2018Assignee: ASAHI INTECC CO., LTD.Inventors: Takeharu Katsurada, Yuta Kubo, Moritaka Ogido
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Publication number: 20180325533Abstract: A balloon catheter prevents detachment of a balloon from an inner shaft without using a conventional sleeve or heat-shrinkable tube. The balloon catheter includes a balloon, an inner shaft, and a tip having a proximal end portion that covers an outer periphery of a distal end of the balloon. The distal end of the balloon is sandwiched between the inner shaft and the proximal end portion of the tip, thereby joining the distal end of the balloon to the inner shaft and the tip.Type: ApplicationFiled: July 24, 2018Publication date: November 15, 2018Applicant: ASAHI INTECC CO., LTD.Inventors: Takeharu KATSURADA, Yuta KUBO, Moritaka OGIDO
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Publication number: 20180289933Abstract: A balloon catheter includes an inner shaft with a distal variant portion and a proximal variant portion. A bulged portion is provided at the distal end of a reinforcement member, and the bulged portion is configured to move in an axial direction between the distal variant portion and the proximal variant portion. Thus, the balloon catheter may smoothly pass through a curved blood vessel with improved kink resistance of the reinforcement member.Type: ApplicationFiled: June 12, 2018Publication date: October 11, 2018Applicant: ASAHI INTECC CO., LTD.Inventors: Kazuteru SEGI, Takeharu KATSURADA, Yuta KUBO
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Patent number: 10022522Abstract: A balloon catheter includes an inner shaft with a distal variant portion and a proximal variant portion. A bulged portion is provided at the distal end of a reinforcement member, and the bulged portion is configured to move in an axial direction between the distal variant portion and the proximal variant portion. Thus, the balloon catheter may smoothly pass through a curved blood vessel with improved kink resistance of the reinforcement member.Type: GrantFiled: December 22, 2015Date of Patent: July 17, 2018Assignee: ASAHI INTEECC CO., LTD.Inventors: Kazuteru Segi, Takeharu Katsurada, Yuta Kubo