Patents by Inventor Hiroshi Hirota

Hiroshi Hirota 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).

  • Publication number: 20210161535
    Abstract: In a ligation device for performing ligation by inserting a string-shaped body wound around a target into a tubular body, an object is to provide a ligation device that does not require a special instrument during the insertion of the string-shaped body and offers excellent workability. A means for solving the problem is a ligation device 1 for ligating a target V. The ligation device 1 includes a tubular body 2 having a tubular shape and including a hollow part 5 into which a string-shaped body 20 can be inserted. The tubular body 2 includes a proximal opening and a distal opening at a proximal end part 3 and a distal end part 4, respectively. The proximal opening and the distal opening communicate with each other via a lumen 5 of the tubular body 2. The side of a first end part 21 of the string-shaped body 20 can be inserted into the hollow part 5.
    Type: Application
    Filed: May 25, 2020
    Publication date: June 3, 2021
    Applicant: FORCE ENGINEERING CO., LTD.
    Inventors: Takanori IMAI, Takaki SAWAHATA, Hiroshi HIROTA, Shinichi KANNO, Shinichi ONO, Tomoyuki SAWAHATA, Tomohiro MURAKAMI, Tomoaki HIGUCHI
  • Publication number: 20200121322
    Abstract: There is provided a lumen maintenance catheter used for vascular suture, in which an operator can stably grip the catheter to improve the operability, and the entire catheter is prevented from entering a blood vessel. The lumen maintenance catheter for vascular suture includes a shaft having flexibility and a bulging part bulging in a radial direction at a distal end of the shaft, wherein the shaft includes a small diameter part on a distal end side, and a large diameter part larger in diameter than the small diameter part, on a rear end side, the small diameter part and the large diameter part are connected by an inclined part that is inclined so that a diameter of the shaft increases toward the rear end side, and the rigidity of the shaft increases as the diameter increases.
    Type: Application
    Filed: September 25, 2018
    Publication date: April 23, 2020
    Applicant: MEDFORCE JAPAN CO., LTD.
    Inventors: Takanori IMAI, Hiroshi HIROTA, Tomohiro MURAKAMI
  • Patent number: 10575832
    Abstract: A biopsy needle device constructed in a manner such that an internal needle is triggered in response to unlocking operation of internal needle locking device, after which a piston is retracted by a piston retraction spring in response to unlocking operation of piston locking device, whereby negative pressure is generated in a recess of the internal needle resulting in suction of biological tissue into the recess, and an external needle is triggered in response to unlocking operation of external needle locking device, thereby cutting and sampling the biological tissue which has been drawn into the recess.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: March 3, 2020
    Assignee: Medforce Japan Co., LTD.
    Inventors: Takanori Imai, Hiroshi Hirota
  • Patent number: 9981114
    Abstract: A winged injection needle including an injection needle main body, a base that supports the base end of the injection needle main body and wings that protrude from the base toward the left and right sides to function as handles, the wings being constructed with plate members that are freely foldable through hinge sections so that in the folded state, they protrude from the base toward the left and right sides to function as handles, while in the expanded state, they extend from the base along the injection needle main body toward the leading edge of the injection needle to function as a safety cover that covers the injection needle main body.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: May 29, 2018
    Assignee: FORCE ENGINEERING CO., LTD.
    Inventors: Takanori Imai, Hiroshi Hirota
  • Patent number: 9750530
    Abstract: An epidural space identification device to identify when a tip of a needle used for epidural anesthesia enters an epidural space that includes a barrel formed in a cylindrical shape and communicatively connected to a needle section, a plunger formed in a cylindrical shape, retractably inserted into the barrel, and having an air hole communicating with an inside of the plunger, and an expansible member having an expansible part provided at a front end part of the plunger and bulging inside of the plunger with a positive pressure generated by pushing the plunger while air discharge from a needle side is regulated.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: September 5, 2017
    Assignee: FORCE ENGINEERING CO., LTD.
    Inventors: Takanori Imai, Hiroshi Hirota
  • Publication number: 20170231607
    Abstract: A biopsy needle device constructed in a manner such that an internal needle is triggered in response to unlocking operation of internal needle locking device, after which a piston is retracted by a piston retraction spring in response to unlocking operation of piston locking device, whereby negative pressure is generated in a recess of the internal needle resulting in suction of biological tissue into the recess, and an external needle is triggered in response to unlocking operation of external needle locking device, thereby cutting and sampling the biological tissue which has been drawn into the recess.
    Type: Application
    Filed: May 13, 2016
    Publication date: August 17, 2017
    Applicant: MEDFORCE JAPAN CO., LTD.
    Inventors: Takanori IMAI, Hiroshi HIROTA
  • Publication number: 20160262792
    Abstract: An epidural space identification device to identify when a tip of a needle used for epidural anesthesia enters an epidural space that includes a barrel formed in a cylindrical shape and communicatively connected to a needle section, a plunger formed in a cylindrical shape, retractably inserted into the barrel, and having an air hole communicating with an inside of the plunger, and an expansible member having an expansible part provided at a front end part of the plunger and bulging inside of the plunger with a positive pressure generated by pushing the plunger while air discharge from a needle side is regulated.
    Type: Application
    Filed: June 25, 2014
    Publication date: September 15, 2016
    Applicant: OUYOUDENSHIIND. CO., LTD.
    Inventors: Takanori IMAI, Hiroshi HIROTA
  • Publication number: 20160228672
    Abstract: A winged injection needle including an injection needle main body, a base that supports the base end of the injection needle main body and wings that protrude from the base toward the left and right sides to function as handles, the wings being constructed with plate members that are freely foldable through hinge sections so that in the folded state, they protrude from the base toward the left and right sides to function as handles, while in the expanded state, they extend from the base along the injection needle main body toward the leading edge of the injection needle to function as a safety cover that covers the injection needle main body.
    Type: Application
    Filed: December 15, 2014
    Publication date: August 11, 2016
    Applicant: Ouyoudenshi Ind. Co., Ltd.
    Inventors: Takanori IMAI, Hiroshi HIROTA
  • Patent number: 8594537
    Abstract: A powder carrier screw includes a rotation shaft which is provided along a path which carries powder such as toner and is rotatably supported by a container forming the path, the rotation shaft having one end from which a rotation driving force is applied, a coil which is provided in a spiral form along an outer circumference of the rotation axis, the coil having a shaft center of the rotation shaft as a shaft center and having both end portions joined to both end portions of the rotation shaft, and the coil rotating along the rotation of the rotation shaft, a thick portion which is provided in at least one end portion of the coil, the thick portion having a thickness larger than a thickness of a general portion of the coil, and a coil welded portion in which the thick portion and the rotation shaft are welded.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: November 26, 2013
    Assignee: Ricoh Company, Ltd.
    Inventor: Hiroshi Hirota
  • Patent number: 8287464
    Abstract: A metal needle is obtained by being dipped in a liquid selected from the group consisting of a strong acid solution of a metal, acetic acid, and butyl acetate, and then dried. Preferably, the strong acid solution of a metal to be used in the dipping treatment may be a nitric acid solution of a metal selected from the group consisting of a transition element, a lanthanoid, and an actinoid, for example, a nitric acid solution of a metal selected from the group consisting of palladium, gadolinium, germanium, beryllium, strontium, scandium, and samarium. The metal needle is a metal needle for insertion into the body that can be reliably imaged even when a general-purpose ultrasound imaging system is used, and thus is useful in confirming insertion of the needle into a blood vessel and arrival of the needle at an organ, and confirming the position of the needle when it is broken.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: October 16, 2012
    Assignee: Nipro Corporation
    Inventors: Hiroshi Hirota, Yoshiharu Iwase
  • Patent number: 7928367
    Abstract: A simple and efficient method of preparing a sample in the measurement according to matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) capable of inhibiting any ion suppression by impurities, such as inorganic salts and surfactants, contained in the sample. An analyte and matrix molecules are co-crystallized in the presence of porous microparticles. Preferably, this co-crystallization is carried out by bringing the analyte, matrix molecules and porous microparticles into contact with each other on a target plate and thereafter drying the mixture. The porous microparticles consist of an ion exchanger having an average particle diameter of not more than 50 ?m, preferably a strongly basic anion exchanger.
    Type: Grant
    Filed: July 2, 2007
    Date of Patent: April 19, 2011
    Assignee: Riken
    Inventors: Hiroshi Hirota, Miwako Asanuma, Seketsu Fukuzawa, Shigeyuki Yokoyama
  • Publication number: 20100310275
    Abstract: A powder carrier screw includes a rotation shaft which is provided along a path which carries powder such as toner and is rotatably supported by a container forming the path, the rotation shaft having one end from which a rotation driving force is applied, a coil which is provided in a spiral form along an outer circumference of the rotation axis, the coil having a shaft center of the rotation shaft as a shaft center and having both end portions joined to both end portions of the rotation shaft, and the coil rotating along the rotation of the rotation shaft, a thick portion which is provided in at least one end portion of the coil, the thick portion having a thickness larger than a thickness of a general portion of the coil, and a coil welded portion in which the thick portion and the rotation shaft are welded.
    Type: Application
    Filed: June 8, 2010
    Publication date: December 9, 2010
    Applicant: RICOH COMPANY, LTD.
    Inventor: Hiroshi HIROTA
  • Publication number: 20100069789
    Abstract: A metal needle is obtained by being dipped in a liquid selected from the group consisting of a strong acid solution of a metal, acetic acid, and butyl acetate, and then dried. Preferably, the strong acid solution of a metal to be used in the dipping treatment may be a nitric acid solution of a metal selected from the group consisting of a transition element, a lanthanoid, and an actinoid, for example, a nitric acid solution of a metal selected from the group consisting of palladium, gadolinium, germanium, beryllium, strontium, scandium, and samarium. The metal needle is a metal needle for insertion into the body that can be reliably imaged even when a general-purpose ultrasound imaging system is used, and thus is useful in confirming insertion of the needle into a blood vessel and arrival of the needle at an organ, and confirming the position of the needle when it is broken.
    Type: Application
    Filed: March 31, 2008
    Publication date: March 18, 2010
    Applicant: NIPRO CORPORATION
    Inventors: Hiroshi Hirota, Yoshiharu Iwase
  • Publication number: 20080067343
    Abstract: A simple and efficient method of preparing a sample in the measurement according to matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) capable of inhibiting any ion suppression by impurities, such as inorganic salts and surfactants, contained in the sample. An analyte and matrix molecules are co-crystallized in the presence of porous microparticles. Preferably, this co-crystallization is carried out by bringing the analyte, matrix molecules and porous microparticles into contact with each other on a target plate and thereafter drying the mixture. The porous microparticles consist of an ion exchanger having an average particle diameter of not more than 50 ?m, preferably a strongly basic anion exchanger.
    Type: Application
    Filed: July 2, 2007
    Publication date: March 20, 2008
    Applicant: RIKEN
    Inventors: Hiroshi HIROTA, Miwako ASANUMA, Seketsu FUKUZAWA, Shigeyuki YOKOYAMA
  • Patent number: 6147215
    Abstract: The present invention provides a highly safe and easily operable process for producing 1-chlorocarbonyl-4-piperidinopiperidine or hydrochloride thereof in a high yield. Described specifically, the present invention relates to a process for producing 1-clorocarbonyl-4-piperidinopiperidine or hydrochloride thereof, which comprises reacting 4-piperidinopiperidine with a trialkylsilyl halide to obtain a 4-piperidinopiperidinyl trialkylsilyl, reacting it with a carbon dioxide gas to obtain a 4-piperidinopiperidinyl trialkylsilyl carbamate derivative, reacting the derivative with thionyl chloride or the like to obtain 1-chlorocarbonyl-4-piperidinopiperidine hydrochloride and optionally treating it with a strong base.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: November 14, 2000
    Assignee: Kabushiki Kaisha Yakult Honsha
    Inventor: Hiroshi Hirota