Patents by Inventor Kazunori Koiwai

Kazunori Koiwai 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).

  • Patent number: 10335551
    Abstract: A needle assembly includes: a retaining portion; and an elastic member that includes a close contact portion that closely contacts and retains the needle tube such that the needle tube protrudes toward a fitting opening, and a deformation portion that extends from the close contact portion toward the fitting opening and is configured to deform when the drug ejection portion comes into contact with the elastic member, and which is provided in a fitting portion. Further, the length of the deformation portion is in a range of 35% or more and 50% or less with respect to the length of the elastic member, and the length of a portion of the needle tube which protrudes from the close contact portion toward the fitting portion is in a range of 45% or more and 245% or less with respect to the deformation portion.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: July 2, 2019
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Yoichiro Iwase, Kazunori Koiwai
  • Publication number: 20190184090
    Abstract: A syringe package contains a prefilled syringe system including a prefilled syringe that includes a syringe body that is filled with a drug, a gasket located in the syringe body, and a plunger partially disposed in the syringe body. The syringe package includes: a package body that houses the prefilled syringe; and a support that is disposed inside the package body and that supports the prefilled syringe. The support includes a displacement regulation unit configured to regulate relative displacement of the syringe body and the plunger in a direction in which the gasket and the plunger approach each other.
    Type: Application
    Filed: February 21, 2019
    Publication date: June 20, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Junichi OGAWA, Yoshikazu KOTANI, Kazunori KOIWAI, Takehiro URA
  • Publication number: 20190175817
    Abstract: A medical equipment package containing a plurality of prefilled syringe systems includes: a plurality of syringe packaging bodies, each comprising a packaging main body that accommodates one of the prefilled syringe systems; and an outer box that accommodates the plurality of syringe packaging bodies. Each prefilled syringe system includes: a prefilled syringe, a needle packaging body including: a needle unit that comprises a needle body configured to puncture a living body, and a needle hub that holds the needle body, and a needle unit case that accommodates the needle unit. The needle unit is supported with respect to the needle unit case such that a largest outer diameter portion provided on a tip end side of the needle hub engages with an inner surface of the needle unit case.
    Type: Application
    Filed: February 21, 2019
    Publication date: June 13, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Junichi OGAWA, Yoshikazu KOTANI, Kazunori KOIWAI, Takehiro URA
  • Publication number: 20180133410
    Abstract: An intradermal injection needle is an intradermal injection needle assembly to be used by piercing the intradermal injection needle into the skin of a living body. The intradermal injection needle has a hollow needle having a blade edge pierceable into the skin and a discharge port of an administration product; and a hub holding the hollow needle. The hollow needle has an outer diameter of 0.15 to 0.20 mm. The discharge port has a length of 0.10 to 0.80 mm in an axial direction of the hollow needle. When the intradermal injection needle is pierced into the skin of the living body, the discharge port thereof is entirely subcutaneously pierceable within a range of 0.20 to 1.00 mm.
    Type: Application
    Filed: January 12, 2018
    Publication date: May 17, 2018
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Takehiro URA, Kiyoshi SAKATA, Sakiko TSUNEDA, Kazunori KOIWAI
  • Publication number: 20180008776
    Abstract: A syringe holder includes: a barrel body that holds a syringe; a holder opening; deformation promoting portions; and radial movement-restricting portions. The radial movement-restricting portions are provided close to the deformation promoting portions. Being brought into contact with first portions, the radial movement-restricting portions restrict the syringe from moving in a radial direction with respect to the barrel body.
    Type: Application
    Filed: September 22, 2017
    Publication date: January 11, 2018
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Junichi OGAWA, Yoichiro IWASE, Kazunori KOIWAI
  • Publication number: 20170312453
    Abstract: A needle assembly includes: a needle comprising a hollow needle tube, a needle tip at a distal end of the hollow needle tube, and a cutting face disposed adjacent to the needle tip; and a needle hub that includes a tip and a base end, and holds the needle at the needle tip. The needle hub includes a needle tip side end face from which the needle tip projects. An outer diameter of the needle is within a range of 0.15 mm to 0.20 mm, inclusive. A projection needle length extending from the needle tip side end face to the needle tip is within a range of 0.50 mm to 1.25 mm, inclusive. A needle body length extending from the needle tip side end face to a proximal end of the cutting face in within a range of 0.10 mm to 0.70 mm, inclusive.
    Type: Application
    Filed: July 19, 2017
    Publication date: November 2, 2017
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Sakiko SHIMIZU, Sayaka OMORI, Kazunori KOIWAI, Yoichiro IWASE
  • Publication number: 20170197035
    Abstract: A needle assembly includes: a retaining portion; and an elastic member that includes a close contact portion that closely contacts and retains the needle tube such that the needle tube protrudes toward a fitting opening, and a deformation portion that extends from the close contact portion toward the fitting opening and is configured to deform when the drug ejection portion comes into contact with the elastic member, and which is provided in a fitting portion. Further, the length of the deformation portion is in a range of 35% or more and 50% or less with respect to the length of the elastic member, and the length of a portion of the needle tube which protrudes from the close contact portion toward the fitting portion is in a range of 45% or more and 245% or less with respect to the deformation portion.
    Type: Application
    Filed: March 27, 2017
    Publication date: July 13, 2017
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Yoichiro IWASE, Kazunori KOIWAI
  • Patent number: 9566393
    Abstract: To securely position a needle tip and a blade face of a needle tube inserted into the skin in a predetermined site of a living body, such as the upper layer of skin, an injection needle assembly includes a needle tube having a needle tip capable of puncturing a living body, a hub holding the needle tube, a stabilizer, and a guide portion. The stabilizer is formed in a tubular shape surrounding the circumference of the needle tube, and an end face is pressed against the skin, and thereby a raised portion of the skin is formed in a tube hole. The guide portion is arranged on the stabilizer, and is adapted to recognize a press-in distance y of the stabilizer to the skin.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: February 14, 2017
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Yoichiro Iwase, Kazunori Koiwai, Tetsuo Tanaka, Sayaka Oomori
  • Publication number: 20160317761
    Abstract: A syringe for injecting a drug solution into an upper layer of skin includes an injection needle having a needle hole communicating from a needle tip to a needle proximal end, the injection needle having a blade face at the needle tip; and a needle hub having a distal end portion and a proximal end portion, the needle hub holding the injection needle at the distal end portion. The needle hub has a needle tip side end face, and the needle tip protrudes from the needle tip side end face. A protruding needle length of the needle tip from the needle tip side end face is 1.15 mm±0.1 mm, and a blade face length of the blade face along an axis of the injection needle is 0.60 mm±0.15 mm.
    Type: Application
    Filed: July 15, 2016
    Publication date: November 3, 2016
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Yoichiro IWASE, Kazunori KOIWAI
  • Patent number: 9302051
    Abstract: A needle does not come off even if a high back pressure occurs at the skin upper section. Thus, the drug leakage from the skin can be prevented. A drug administration device 1 includes a tubular section 2 having a fluid chamber 7 capable of accommodating a drug and a discharge section 22, a pusher member 3 moving within the tubular section 2, a grip section 4, and a connection section 5. The pusher member 3 includes a rod-shape plunger 31 and a gasket 32. The grip section 4 is disposed along the outer periphery of the tubular section 2 and kept away from the tubular section 2, and the connection section 5 is formed between the tubular section 2 and the grip section 4.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: April 5, 2016
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Takayuki Yokota, Yoichiro Iwase, Naoki Sakaguchi, Kazunori Koiwai, Yoshinori Hishikawa
  • Publication number: 20140107578
    Abstract: To securely position a needle tip and a blade face of a needle tube inserted into the skin in a predetermined site of a living body, such as the upper layer of skin, an injection needle assembly includes a needle tube having a needle tip capable of puncturing a living body, a hub holding the needle tube, a stabilizer, and a guide portion. The stabilizer is formed in a tubular shape surrounding the circumference of the needle tube, and an end face is pressed against the skin, and thereby a raised portion of the skin is formed in a tube hole. The guide portion is arranged on the stabilizer, and is adapted to recognize a press-in distance y of the stabilizer to the skin.
    Type: Application
    Filed: December 17, 2013
    Publication date: April 17, 2014
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Yoichiro IWASE, Kazunori KOIWAI, Tetsuo TANAKA, Sayaka OOMORI
  • Patent number: 8663163
    Abstract: A needle tip of a needle tube stuck in the skin is caused to be reliably positioned in the skin upper layer part and the injected drug is caused not to leak to the outside of the body. An injection needle is provided with a needle tube having a needle tip, a hub that holds the needle tube and an adjustment unit provided around the needle tube and having a needle-protruding surface through which the needle tip of the needle tube protrudes. The needle-protruding surface of the adjustment unit is formed such that the distance S from the circumferential edge to the circumferential surface of the needle tube is in the range of 0.3-1.4 mm.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: March 4, 2014
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Yoichiro Iwase, Kazunori Koiwai, Tetsuo Tanaka, Sayaka Oomori, Takanori Ijitsu
  • Patent number: 8622963
    Abstract: To securely position a needle tip and a blade face of a needle tube inserted into the skin in a predetermined site of a living body, such as the upper layer of skin, an injection needle assembly includes a needle tube having a needle tip capable of puncturing a living body, a hub holding the needle tube, a stabilizer, and a guide portion. The stabilizer is formed in a tubular shape surrounding the circumference of the needle tube, and an end face is pressed against the skin, and thereby a raised portion of the skin is formed in a tube hole. The guide portion is arranged on the stabilizer, and is adapted to recognize a press-in distance y of the stabilizer to the skin.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: January 7, 2014
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Yoichiro Iwase, Kazunori Koiwai, Tetsuo Tanaka, Sayaka Oomori
  • Publication number: 20130079729
    Abstract: A needle does not come off even if a high back pressure occurs at the skin upper section. Thus, the drug leakage from the skin can be prevented. A drug administration device 1 includes a tubular section 2 having a fluid chamber 7 capable of accommodating a drug and a discharge section 22, a pusher member 3 moving within the tubular section 2, a grip section 4, and a connection section 5. The pusher member 3 includes a rod-shape plunger 31 and a gasket 32. The grip section 4 is disposed along the outer periphery of the tubular section 2 and kept away from the tubular section 2, and the connection section 5 is formed between the tubular section 2 and the grip section 4.
    Type: Application
    Filed: March 2, 2011
    Publication date: March 28, 2013
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Takayuki Yokota, Yoichiro Iwase, Naoki Sakaguchi, Kazunori Koiwai, Yoshinori Hishikawa
  • Publication number: 20120046615
    Abstract: An injection needle assembly includes a needle tube 2 having a needle tip capable of being stuck into a living body, a hub 3 holding the needle tube 2, a stabilization unit 6 arranged so as to cover the circumference of the needle tube 2 in a condition that the needle tip of the needle tube 2 protrudes and having an end face 6c that contacts the skin when causing the needle tube 2 to be stuck into the living body, and housing units 7 and 8. The housing units 7 and 8 are movable along the axial direction of the needle tube 2 from the first position where the needle tip of the needle tube 2 is exposed to the second position where the needle tip of the needle tube 2 is housed.
    Type: Application
    Filed: March 5, 2010
    Publication date: February 23, 2012
    Inventors: Kazunori Koiwai, Yoichiro Iwase
  • Publication number: 20110275994
    Abstract: To securely position a needle tip and a blade face of a needle tube inserted into the skin in a predetermined site of a living body, such as the upper layer of skin, an injection needle assembly includes a needle tube having a needle tip capable of puncturing a living body, a hub holding the needle tube, a stabilizer, and a guide portion. The stabilizer is formed in a tubular shape surrounding the circumference of the needle tube, and an end face is pressed against the skin, and thereby a raised portion of the skin is formed in a tube hole. The guide portion is arranged on the stabilizer, and is adapted to recognize a press-in distance y of the stabilizer to the skin.
    Type: Application
    Filed: January 29, 2010
    Publication date: November 10, 2011
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Yoichiro Iwase, Kazunori Koiwai, Tetsuo Tanaka, Sayaka Oomori
  • Publication number: 20110166520
    Abstract: A needle tip of a needle tube stuck in the skin is caused to be reliably positioned in the skin upper layer part and the injected drug is caused not to leak to the outside of the body. An injection needle 1 is provided with a needle tube 2 of 26-33 G having a needle tip, a hub 3 that holds the needle tube 2, and an adjustment unit 4 provided around the needle tube 2 and having a needle-protruding surface 4b through which the needle tip of the needle tube 2 protrudes. And, the needle-protruding surface 4b of the adjustment unit 4 is formed such that the distance S from the circumferential edge to the circumferential surface of the needle tube 2 is in the range of 0.3-1.4 mm.
    Type: Application
    Filed: September 24, 2009
    Publication date: July 7, 2011
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Yoichiro Iwase, Kazunori Koiwai, Tetsuo Tanaka, Sayaka Oomori, Takanori Ijitsu
  • Patent number: 7297475
    Abstract: A medicament injection kit, for use in occluding a renal artery and a renal vein in a kidney and injecting a therapeutic medicament into the kidney so as to pressurize the kidney, includes: an artery catheter which includes a first balloon capable of occluding the renal artery; a vein catheter which includes a second balloon capable of occluding the renal vein; a syringe for injecting the therapeutic medicament, the syringe being capable of being connected to at least one of the artery catheter and the vein catheter; and a syringe for pressurizing the inside of the kidney by injecting a liquid, the syringe being capable of being connected to at least one of the artery catheter and the vein catheter.
    Type: Grant
    Filed: May 7, 2004
    Date of Patent: November 20, 2007
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Kazunori Koiwai, Tetsuo Tanaka
  • Publication number: 20040253212
    Abstract: Disclosed here in is a medicament injection kit, for use in occluding an artery and a vein in a target tissue and injecting a therapeutic medicament into the occluded target tissue so as to pressurize the target tissue, includes: a catheter for artery which includes first blood vessel occluding means capable of indwelling in a blood vessel; a catheter for vein which includes second blood vessel occluding means capable of indwelling in a blood vessel; means for injecting the therapeutic medicament, the injecting means being capable of being connected to at least one of the catheter for artery and the catheter for vein; and means for pressurizing the inside of a blood vessel by injecting a liquid, the pressurizing means being capable of being connected to at least one of the catheter for artery and the catheter for vein.
    Type: Application
    Filed: May 7, 2004
    Publication date: December 16, 2004
    Applicant: Terumo Kabushiki Kaisha
    Inventors: Kazunori Koiwai, Tetsuo Tanaka
  • Patent number: 6228391
    Abstract: Novel amidine derivatives of the formula (1); and drug carriers such as liposomes or emulsions comprising the derivatives, which can enclose genetic materials or drugs and transfer them to cells or affected sites efficiently and safely, wherein A is an aromatic ring, R1 and R2 are the same or different and independently represent an alkyl group having any one of 10 to 25 carbon atoms, and an alkenyl group having any one of 10 to 25 carbon atoms, X and Y are the same or different and independently represent —O—, —S—, —COO—, —OCO—, —CONH—, or —NHCO—, m is 0 or 1, and n is 0 or a natural number of 1 to 6.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: May 8, 2001
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Kazuhiro Shimizu, Masashi Isozaki, Kazunori Koiwai