Patents by Inventor Masaki Mashiko
Masaki Mashiko 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: 9138224Abstract: A bending method for a straight needle-shaped material which has a thickness decreased from a body portion to a needle point that is inserted between a roller having a processing surface and a belt and is wound around the roller via a separating member. Then the roller is rotated and the belt is wound, thereby pressing and curving the straight needle-shaped material onto the processing surface. In a suture needle, a portion of a tip side including the needle point is formed as a non-restricted portion which is not restricted by the processing surface of the roller, and a portion except for the non-restricted portion is formed as a curved portion which is bent along the processing surface of the roller.Type: GrantFiled: August 29, 2007Date of Patent: September 22, 2015Assignee: MANI, INC.Inventors: Kanji Matsutani, Masaki Mashiko, Yoshimasa Tochimura
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Publication number: 20130172930Abstract: When a biotissue is sutured using a curved medical suture needle, the penetration resistance becomes uniform. In a bending method, a straight needle-shaped material which has a thickness decreased from a body portion to a needle point is inserted between a roller having a processing surface and a belt wound around the roller via a separating member, and then the roller is rotated and the belt is winded, thereby pressing and curving the straight needle-shaped material onto the processing surface. In a suture needle, a portion of a tip side including the needle point is formed as a non-restricted portion which is not restricted by the processing surface of the roller, and a portion except for the non-restricted portion is formed as a curved portion which is bent along the processing surface of the roller.Type: ApplicationFiled: November 28, 2012Publication date: July 4, 2013Inventors: Kanji Matsutani, Masaki Mashiko, Yoshimasa Tochimura
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Patent number: 8105354Abstract: A triangular suture needle having a low thrust resistance and a press mold suitable for manufacturing the same are provided. The triangular suture needle includes: an angular triangular prism-shaped part (100a) on the needlepoint side; a rounded triangular prism-shaped part (100b) connecting to the needle base side of said triangular prism-shaped part; and a thread attaching part (100c) in a needle base end. The entire angular triangular prism-shaped part (100a) is ground, forming a pointed, sharpened part (100d) with a sharp tip. Furthermore, width (w1) of the thickest portion of the sharpened part (100d) is greater than width (w2) of the rounded triangular prism-shaped part connecting to that portion.Type: GrantFiled: July 10, 2007Date of Patent: January 31, 2012Assignee: MANI, Inc.Inventors: Yoshimasa Tochimura, Kanji Matsutani, Masaki Mashiko
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Patent number: 8028870Abstract: In an eyeless sewing needle, a periphery of an axial hole at the base end is heated to make a fibrous structure be a granular structure without directionality, and at least a part of a heat-affected zone made between the fibrous structure and the granular structure due to the heating is within a range that is three times the diameter of the sewing needle and that extends from an effective base of the axial hole towards the needlepoint. This allows provision of a flexible sewing needle so that the hole periphery can be processed while keeping a hard state at the position of the needlepoint slightly away from the axial hole.Type: GrantFiled: February 27, 2007Date of Patent: October 4, 2011Assignee: MANI, Inc.Inventors: Masaki Mashiko, Kanji Matsutani, Kosuke Shinohara, Mieko Akaba
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Patent number: 7977603Abstract: A method for manufacturing an eyeless needle by which a satisfactory hole can be formed in the end surface of a fine suture needle having a needle diameter less than 150 micrometers is proposed. In a method for manufacturing an eyeless needle by forming a hole for inserting and fixing one end of a suture thread by caulking in the end surface of the eyeless suture needle made of stainless steel, the hole is formed by irradiating the end surface of a needle material thicker by 6 to 20 micrometers than a desired needle diameter of the suture needle less than 150 micrometers with one shot of a laser beam, and subsequently, a portion thicker than the desired needle diameter is removed by electrolytic polishing or chemical polishing.Type: GrantFiled: March 30, 2006Date of Patent: July 12, 2011Assignee: MANI., Inc.Inventors: Kanji Matsutani, Masaki Mashiko, Yuji Yokoyama, Mieko Akaba, Hiroshi Yagisawa, Masao Akatsuka, Shoichi Fukuda
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Publication number: 20100069956Abstract: When a biotissue is sutured using a curved medical suture needle, the penetration resistance becomes uniform. In a bending method, a straight needle-shaped material A which has a thickness decreased from a body portion 1 to a needle point 2 is inserted between a roller 11 having a processing surface 11a and a belt 12 wound around the roller 11 via a separating member 21, and then the roller 11 is rotated and the belt 12 is winded, thereby pressing and curving the straight needle-shaped material onto the processing surface 11a. In a suture needle B, a portion of a tip side including the needle point 2 is formed as a non-restricted portion which is not restricted by the processing surface 11a of the roller 11, and a portion except for the non-restricted portion is formed as a curved portion which is bent along the processing surface 11a of the roller 11.Type: ApplicationFiled: August 29, 2007Publication date: March 18, 2010Inventors: Kanji Matsutani, Masaki Mashiko, Yoshimasa Tochimura
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Patent number: 7662170Abstract: A medical needle and the like that has small resistance when piercing, scraping or incising the body tissue, that is not easily bent and that reduces the reflection of the illumination as much as possible when in surgery performed under scope is provided. The medical needle and the like has a hardened layer, in which a carbon atom is penetrated, of a depth of 5 micrometers to 70 micrometers provided on a parent material surface of a fiber shape structure having an austenite stainless steel containing 1% to 6% of molybdenum or 13% to 25% of chromium. Further, after the hardened layer is provided, one part of the hardened layer is removed. Further, the dark layer is formed on the outer most surface of the hardened layer to provide a non-reflective surface.Type: GrantFiled: September 9, 2005Date of Patent: February 16, 2010Assignee: Mani, Inc.Inventors: Masaki Mashiko, Kanji Matsutani
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Publication number: 20100023053Abstract: A simple fabrication method for a suture needle coated with silicone, which prevents silicone from penetrating into a hole is provided. The fabrication method for a suture needle coated with silicone includes the steps of: facing a hole 12 formed at a base of an eyeless suture needle 10 downward and supporting it with a gripping unit; and coating silicone on the entire outside of the eyeless suture needle, making the inner wall of the hole be the base material of the eyeless suture needle. Consequently, the silicone can be prevented from intruding into the hole by a simple method.Type: ApplicationFiled: August 28, 2007Publication date: January 28, 2010Inventors: Shinichi Akutsu, Kanji Matsutani, Masaki Mashiko
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Publication number: 20090292312Abstract: A triangular suture needle having a low thrust resistance and a press mold suitable for manufacturing the same are provided. The triangular suture needle includes: an angular triangular prism-shaped part (100a) on the needlepoint side; a rounded triangular prism-shaped part (100b) connecting to the needle base side of said triangular prism-shaped part; and a thread attaching part (100c) in a needle base end. The entire angular triangular prism-shaped part (100a) is ground, forming a pointed, sharpened part (100d) with a sharp tip. Furthermore, width (w1) of the thickest portion of the sharpened part (100d) is greater than width (w2) of the rounded triangular prism-shaped part connecting to that portion.Type: ApplicationFiled: July 10, 2007Publication date: November 26, 2009Inventors: Yoshimasa Tochimura, Kanji Matsutani, Masaki Mashiko
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Publication number: 20090039117Abstract: In an eyeless sewing needle, a periphery of an axial hole at the base end is heated to make a fibrous structure be a granular structure without directionality, and at least a part of a heat-affected zone made between the fibrous structure and the granular structure due to the heating is within a range that is three times the diameter of the sewing needle and that extends from an effective base of the axial hole towards the needlepoint. This allows provision of a flexible sewing needle so that the hole periphery can be processed while keeping a hard state at the position of the needlepoint slightly away from the axial hole.Type: ApplicationFiled: February 27, 2007Publication date: February 12, 2009Applicant: MANI, Inc.Inventors: Masaki Mashiko, Kanji Matsutani, Kosuke Shinohara, Mieko Akaba
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Publication number: 20060219677Abstract: A method for manufacturing an eyeless needle by which a satisfactory hole can be formed in the end surface of a fine suture needle having a needle diameter less than 150 micrometers is proposed. In a method for manufacturing an eyeless needle by forming a hole for inserting and fixing one end of a suture thread by caulking in the end surface of the eyeless suture needle made of stainless steel, the hole is formed by irradiating the end surface of a needle material thicker by 6 to 20 micrometers than a desired needle diameter of the suture needle less than 150 micrometers with one shot of a laser beam, and subsequently, a portion thicker than the desired needle diameter is removed by electrolytic polishing or chemical polishing.Type: ApplicationFiled: March 30, 2006Publication date: October 5, 2006Applicant: MANI., Inc.Inventors: Kanji Matsutani, Masaki Mashiko, Yuji Yokoyama, Mieko Akaba, Hiroshi Yagisawa, Masao Akatsuka, Shoichi Fukuda
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Publication number: 20060058843Abstract: A medical needle and the like that has small resistance when piercing, scraping or incising the body tissue, that is not easily bent and that reduces the reflection of the illumination as much as possible when in surgery performed under scope is provided. The medical needle and the like has a hardened layer, in which a carbon atom is penetrated, of a depth of 5 micrometers to 70 micrometers provided on a parent material surface of a fiber shape structure having an austenite stainless steel containing 1% to 6% of molybdenum or 13% to 25% of chromium. Further, after the hardened layer is provided, one part of the hardened layer is removed. Further, the dark layer is formed on the outer most surface of the hardened layer to provide a non-reflective surface.Type: ApplicationFiled: September 9, 2005Publication date: March 16, 2006Inventors: Masaki Mashiko, Kanji Matsutani