Patents by Inventor Masaaki Ohta

Masaaki Ohta 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: 11911544
    Abstract: A blood purification apparatus that includes a blood circuit including an arterial blood circuit and a venous blood circuit and that allows a patient's blood to extracorporeally circulate, with a blood purifier that is interposed between the arterial blood circuit and the venous blood circuit and purifies; a dialysate temporary chamber that temporarily stores dialysate received from a dialysate storage supported by a supporting unit; a substitution-fluid temporary chamber that temporarily stores substitution fluid received from a substitution-fluid storage supported by the supporting unit; a first dialysate introduction line through which the dialysate in the dialysate storage flows into the dialysate temporary chamber; and a substitution line through which the substitution fluid in the substitution-fluid storage flows into the substitution-fluid temporary chamber.
    Type: Grant
    Filed: April 8, 2021
    Date of Patent: February 27, 2024
    Assignee: Nikkiso Company Limited
    Inventors: Tomohiro Furuhashi, Yuki Eda, Masaaki Ohta, Kenji Furuhashi
  • Publication number: 20210316050
    Abstract: A blood purification apparatus including the following: a peristaltic pump that includes a stator to which a pump tube including a first portion and a second portion is detachably attached, and a rotor including a roller and a guide portion, the roller delivering liquid by squeezing the pump tube attached to the stator, the guide portion retaining the pump tube at an appropriate position where the pump tube is squeezable with the roller, the rotor being rotatable about a predetermined axis; an anchor member that anchors an attaching member to which the pump tube is attached; and a displacing portion that displaces the attaching member between a set position and an unset position by moving the anchor member with the attaching member being anchored by the anchor member.
    Type: Application
    Filed: June 22, 2021
    Publication date: October 14, 2021
    Inventors: Yuki Eda, Masaaki Ohta
  • Publication number: 20210220537
    Abstract: A blood purification apparatus that includes a blood circuit including an arterial blood circuit and a venous blood circuit and that allows a patient's blood to extracorporeally circulate, with a blood purifier that is interposed between the arterial blood circuit and the venous blood circuit and purifies; a dialysate temporary chamber that temporarily stores dialysate received from a dialysate storage supported by a supporting unit; a substitution-fluid temporary chamber that temporarily stores substitution fluid received from a substitution-fluid storage supported by the supporting unit; a first dialysate introduction line through which the dialysate in the dialysate storage flows into the dialysate temporary chamber; and a substitution line through which the substitution fluid in the substitution-fluid storage flows into the substitution-fluid temporary chamber.
    Type: Application
    Filed: April 8, 2021
    Publication date: July 22, 2021
    Inventors: Tomohiro Furuhashi, Yuki Eda, Masaaki Ohta, Kenji Furuhashi
  • Publication number: 20210213189
    Abstract: A blood purification apparatus capable of performing pre-substitution and post-substitution simultaneously is provided. A patient's blood flows through an arterial blood circuit and reaches a dialyzer. The blood purified by the dialyzer flows through a venous blood circuit and returns into the patient. A first substitution pump delivers substitution fluid through a substitution line to a branching point. A pre-substitution line connects the branching point and the arterial blood circuit to each other and is provided with a second substitution pump at a halfway position thereof. A post-substitution line connects the branching point and the venous blood circuit to each other and is provided with a check valve at a halfway position thereof. When the two pumps are activated simultaneously, the substitution fluid is supplied to the arterial blood circuit (pre-substitution). When only the first substitution pump is activated, the substitution fluid is supplied to the venous blood circuit (post-substitution).
    Type: Application
    Filed: March 26, 2021
    Publication date: July 15, 2021
    Inventors: Tomohiro Furuhashi, Yuki Eda, Masaaki Ohta, Kazuhide Ono
  • Publication number: 20210038796
    Abstract: A blood purification apparatus including an apparatus body to which a medical component for giving blood purification treatment to a patient is to be attached; a storage unit that stores treatment information regarding the blood purification treatment for the patient; a reading unit capable of reading component information of the medical component held by an information-holding unit; and a verifying unit capable of comparing the component information read by the reading unit and the treatment information stored in the storage unit and verifying whether or not the medical component is appropriate for being attached to the apparatus body. The medical component is sealed in a sterile bag before being attached to the apparatus body. Furthermore, the reading unit is capable of reading the component information in the information-holding unit from an outside of the sterile bag.
    Type: Application
    Filed: October 26, 2020
    Publication date: February 11, 2021
    Inventors: Masaaki Ohta, Kazuhide Ono
  • Patent number: 5904929
    Abstract: A pharmaceutical composition for trans-mucosal or transdermal administration wherein a per-C.sub.2-18 acylated cyclodextrin is used as a drug reservoir or carrier. The composition can be used safely and exhibits excellent drug release behavior.
    Type: Grant
    Filed: July 2, 1997
    Date of Patent: May 18, 1999
    Assignee: Janssen Pharmaceutica, N.V.
    Inventors: Kaneto Uekama, Fumitoshi Hirayama, Akira Kondo, Masaaki Ohta, Yasuhiro Okamoto, Haruo Kunihiro
  • Patent number: 5682431
    Abstract: The FM stereo broadcasting apparatus has a sampling frequency converter for receiving a digital input signal having an L (left audio)-signal and an R (right audio)-signal and for converting the digital input signal so that its sampling frequency is equal to either a frequency of a subcarrier of a composite audio signal or a first sampling frequency of a first sampling signal for the operation of a composite audio signal generator, a sampling signal generator for generating the first sampling signal for the operation of the composite audio signal generator having the first sampling frequency which is equal to 2.sup.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: October 28, 1997
    Assignees: Hitachi Denshi Kabushiki Kaisha, Nippon Hoso Kyokai
    Inventors: Makoto Ohnishi, Masaaki Ohta, Ikuzi Fuzitani, Toshiaki Nario, Kazuhisa Hayeiwa, Yoshihiko Nasu
  • Patent number: 5473280
    Abstract: In a complex modulation/demodulation method and system, the data frequency f.sub.C1 of data signals I and Q inputted to a constellation mapping circuit is converted by a digital interpolation circuit into a sampling frequency f.sub.C2 equal to f.sub.S /N, where f.sub.S is an operation sampling frequency and N is selected such that the signal maximum frequency of the data signals I and Q becomes lower than f.sub.C2 /2. The interpolated data signals I and Q are respectively inputted to real and imaginary input terminals of a complex coefficient band pass filter to extract a real signal output. An output signal of the complex coefficient band pass filter is converted by a DA converter into an analog signal from which desired frequency components are extracted by an analog band pass filter, thereby performing a quadrature modulation.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: December 5, 1995
    Assignees: Hitachi, Ltd., Hitachi Denshi Kabushiki Kaisha
    Inventors: Makoto Ohnishi, Masaaki Ohta, Masaru Adachi