Patents by Inventor Eiichi Murakami

Eiichi Murakami 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: 10197424
    Abstract: An ultrasonic flowmeter capable of increasing the amplitude of, and the receiving sensitivity for, an excited signal is provided. The ultrasonic flowmeter according to the present invention includes two or more ultrasonic transducers on a transmission side and two or more ultrasonic transducers on a receiving side, located as being away from each other on an outer surface of a tube having a fluid flowing therein. The two or more ultrasonic transducers located on the transmission side are driven so as to press the tube at substantially the same pressure to increase an amplitude of an ultrasonic wave. The ultrasonic flowmeter according to the present invention includes adjustment members converting an ultrasonic signal into an ultrasonic signal suitable to measurement between the tube and the ultrasonic transducers. The adjustment members each have a curved surface or a groove at a surface thereof contacting the tube.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: February 5, 2019
    Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, ATSUDEN CO., LTD.
    Inventors: Harumichi Sato, Jun Akedo, Eiichi Murakami
  • Patent number: 10175078
    Abstract: A holder is mounted on a U-shaped curved tube portion of a measurement tube formed of a synthetic resin, and wing-shaped strips having a plate shape protrude outward from the holder. Distortion caused by a Coriolis force which depends on a flow rate is generated symmetrically with respect to a center line passing through a distal end of the curved tube portion and parallel to an outbound tube and an inbound tube. Therefore, the outbound tube and the inbound tube are twisted about the center line of the holder, and an amount of distortion is enhanced by the wing-shaped strips under the principle of leverage for detection.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: January 8, 2019
    Assignee: ATSUDEN CO., LTD.
    Inventor: Eiichi Murakami
  • Patent number: 10175076
    Abstract: An inlet conduit and an outlet conduit are disposed in a so-called crank shape with respect to a straight conduit. The straight conduit is provided with wall surfaces with which piezoelectric elements come into abutment from outside, and ultrasonic transceiver units are demountably mounted on the outside of the wall surfaces respectively. The two ultrasonic transceiver units have the same shape, and each include a covering member formed of a synthetic resin, the piezoelectric element provided in the covering member for transmitting and receiving an ultrasonic beam, and a cable connected to the piezoelectric element. The conduit portion and the ultrasonic transceiver unit are assembled separately. The ultrasonic transceiver units are disposed on both sides of the conduit portion and are coupled thereto with screws.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: January 8, 2019
    Assignee: RYUSOK CO., LTD.
    Inventors: Eiichi Murakami, Kohei Sakiyama
  • Publication number: 20180283917
    Abstract: An inlet conduit and an outlet conduit are disposed in a so-called crank shape with respect to a straight conduit. The straight conduit is provided with wall surfaces with which piezoelectric elements come into abutment from outside, and ultrasonic transceiver units are demountably mounted on the outside of the wall surfaces respectively. The two ultrasonic transceiver units have the same shape, and each include a covering member formed of a synthetic resin, the piezoelectric element provided in the covering member for transmitting and receiving an ultrasonic beam, and a cable connected to the piezoelectric element. The conduit portion and the ultrasonic transceiver unit are assembled separately. The ultrasonic transceiver units are disposed on both sides of the conduit portion and are coupled thereto with screws.
    Type: Application
    Filed: January 12, 2018
    Publication date: October 4, 2018
    Inventors: EIICHI MURAKAMI, KOHEI SAKIYAMA
  • Publication number: 20180283920
    Abstract: A holder is mounted on a U-shaped curved tube portion of a measurement tube formed of a synthetic resin, and wing-shaped strips having a plate shape protrude outward from the holder. Distortion caused by a Coriolis force which depends on a flow rate is generated symmetrically with respect to a center line passing through a distal end of the curved tube portion and parallel to an outbound tube and an inbound tube. Therefore, the outbound tube and the inbound tube are twisted about the center line of the holder, and an amount of distortion is enhanced by the wing-shaped strips under the principle of leverage for detection.
    Type: Application
    Filed: January 12, 2018
    Publication date: October 4, 2018
    Inventor: Eiichi Murakami
  • Patent number: 9995612
    Abstract: A locking portion is attached on a curved tube portion of a measurement tube, and a hole portion is formed at a distal end of the locking portion in a vertical direction, and a conical depression is provided on an inner wall surface on outside of the hole portion. A coupling ring of a coupling portion engages the hole portion, and a pivot needle, coming into abutment with the conical depression abuts from an inner wall surface of the coupling ring which faces the conical depression. The other end of the coupling ring is elastically attracted toward a fixing portion via an elastic member formed of an extension spring.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: June 12, 2018
    Assignee: ATSUDEN CO., LTD.
    Inventor: Eiichi Murakami
  • Patent number: 9921093
    Abstract: A first magnetic holder is attached to a U-shaped curved tube portion of a synthetic resin made measurement tube, and a magnetomotive body having a magnetic pole surface facing forward is embedded in a distal end of the first magnetic holder. A second magnetic holder is provided on a substrate at a position facing the distal end of the first magnetic holder with a space apart therefrom. The second magnetic holder includes a permanent magnet disposed to face the magnetomotive body in the first magnetic holder with a magnetic pole surface facing toward the first magnetic holder, so that the magnetic pole surface having a magnetic pole opposite to that of the magnetomotive body face each other. The permanent magnet of the second magnetic holder retains the curved tube portion of the measurement tube elastically with a space apart therefrom by attracting the magnetomotive body with a magnetic attraction force.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: March 20, 2018
    Assignee: ATSUDEN CO., LTD.
    Inventors: Eiichi Murakami, Yoshiaki Suzuki
  • Publication number: 20170122787
    Abstract: A locking portion is attached on a curved tube portion of a measurement tube, and a hole portion is formed at a distal end of the locking portion in a vertical direction, and a conical depression is provided on an inner wall surface on outside of the hole portion. A coupling ring of a coupling portion engages the hole portion, and a pivot needle, coming into abutment with the conical depression abuts from an inner wall surface of the coupling ring which faces the conical depression. The other end of the coupling ring is elastically attracted toward a fixing portion via an elastic member formed of an extension spring.
    Type: Application
    Filed: October 18, 2016
    Publication date: May 4, 2017
    Inventor: EIICHI MURAKAMI
  • Publication number: 20170102257
    Abstract: A first magnetic holder is attached to a U-shaped curved tube portion of a synthetic resin made measurement tube, and a magnetomotive body having a magnetic pole surface facing forward is embedded in a distal end of the first magnetic holder. A second magnetic holder is provided on a substrate at a position facing the distal end of the first magnetic holder with a space apart therefrom. The second magnetic holder includes a permanent magnet disposed to face the magnetomotive body in the first magnetic holder with a magnetic pole surface facing toward the first magnetic holder, so that the magnetic pole surface having a magnetic pole opposite to that of the magnetomotive body face each other. The permanent magnet of the second magnetic holder retains the curved tube portion of the measurement tube elastically with a space apart therefrom by attracting the magnetomotive body with a magnetic attraction force.
    Type: Application
    Filed: October 5, 2016
    Publication date: April 13, 2017
    Inventors: EIICHI MURAKAMI, YOSHIAKI SUZUKI
  • Patent number: 9588934
    Abstract: A disposable conduit 1 includes piezo-electric elements 2a and 2b and a memory chip 10 in which calibration data specific to the relevant conduit is stored. Before measurement, a non-disposable electrical measuring circuit reads the calibration data out of the memory chip 10 to prepare a calibrating equation or a calibration table. A flow speed of a blood passing through the conduit or a flow rate calculated from the flow speed is corrected in accordance with the calibrating equation or calibration table.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: March 7, 2017
    Assignee: ATSUDEN CO., LTD.
    Inventor: Eiichi Murakami
  • Publication number: 20170059379
    Abstract: An ultrasonic flowmeter capable of increasing the amplitude of, and the receiving sensitivity for, an excited signal is provided. The ultrasonic flowmeter according to the present invention includes two or more ultrasonic transducers on a transmission side and two or more ultrasonic transducers on a receiving side, located as being away from each other on an outer surface of a tube having a fluid flowing therein. The two or more ultrasonic transducers located on the transmission side are driven so as to press the tube at substantially the same pressure to increase an amplitude of an ultrasonic wave. The ultrasonic flowmeter according to the present invention includes adjustment members converting an ultrasonic signal into an ultrasonic signal suitable to measurement between the tube and the ultrasonic transducers. The adjustment members each have a curved surface or a groove at a surface thereof contacting the tube.
    Type: Application
    Filed: November 16, 2016
    Publication date: March 2, 2017
    Inventors: Harumichi SATO, Jun AKEDO, Eiichi MURAKAMI
  • Patent number: 9391606
    Abstract: An NBTI malfunction of a P-channel MOS transistor is prevented. A semiconductor integrated circuit device includes a reset pulse control unit RPC. The reset pulse control unit RPC generates a reset pulse RP for recovery from degradation caused by NBTI of a MOS transistor that receives a negative voltage at the gate of the transistor in a standby status. After the generated reset pulse RP is inputted to the gate of the MOS transistor, an action control signal ACC for activating the MOS transistor is inputted to the gate of the MOS transistor to activate the transistor.
    Type: Grant
    Filed: October 4, 2014
    Date of Patent: July 12, 2016
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Noritaka Fukuo, Hideki Aono, Eiichi Murakami
  • Publication number: 20150109046
    Abstract: An NBTI malfunction of a P-channel MOS transistor is prevented. A semiconductor integrated circuit device includes a reset pulse control unit RPC. The reset pulse control unit RPC generates a reset pulse RP for recovery from degradation caused by NBTI of a MOS transistor that receives a negative voltage at the gate of the transistor in a standby status. After the generated reset pulse RP is inputted to the gate of the MOS transistor, an action control signal ACC for activating the MOS transistor is inputted to the gate of the MOS transistor to activate the transistor.
    Type: Application
    Filed: October 4, 2014
    Publication date: April 23, 2015
    Inventors: Noritaka Fukuo, Hideki AONO, Eiichi Murakami
  • Patent number: 8997581
    Abstract: [Problem] A flow rate measuring device in which guided waves are used, wherein the frequency of ultrasound is optimized; and energy injected from ultrasound transmission/reception elements is increased and the flow velocity sensitivity is raised; whereby the measurement accuracy is improved. [Solution] A frequency of an isolated peak of group velocities of guided waves, from among a plurality of peaks of group velocities of guided waves, and a resonance frequency of the ultrasound transmission element/reception element are set to agree; and the semi-amplitude of a power spectrum of ultrasound excited/received by the ultrasound transmission element/reception element is set to a value that does not overlap with another peak of group velocities.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: April 7, 2015
    Assignee: National Institute of Advanced Industrial Science and Technology Atsuden Co., Ltd.
    Inventors: Harumichi Sato, Jun Akedo, Eiichi Murakami
  • Patent number: 8919208
    Abstract: An ultrasonic flowmeter apparatus, which can be mounted on a conduit flowing a fluid whose flow rate is to be measured, has two housing halves coupled swingably about an axis. Free ends of the housing halves include a clamp mechanism for closing and locking the halves in position. The halves have formed therein grooves 1a and 2a, respectively, and a pair of ultrasonic wave transmission and reception elements are provided on an inner wall of the groove 1a. When the conduit is clamped between the grooves, the conduit is urged against the inner walls and deformed into a substantially square cross sectional configuration. An ultrasonic wave beam B is projected from one of the elements into a fluid passing through the conduit, the beam is reflected by an opposite surface of the conduit urged against the groove 2a, and the reflected beam is received by the other element.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: December 30, 2014
    Assignee: Atsuden Co., Ltd.
    Inventor: Eiichi Murakami
  • Patent number: 8720280
    Abstract: A conduit P is clamped within a clamping hole 16 formed by min body 1, left and right side plates 2, 4 and top plate 3. The clamping hole is maintained by a locking mechanism 5, 5a and 11, and the conduit is deformed to have a substantially square cross section. Ultrasonic signal transmission and reception elements 13a and 13b are arranged in the main body such that an ultrasonic beam emitted from one of the elements is received by the other element after the beam is reflected by the top plate.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: May 13, 2014
    Assignee: Atsuden Co., Ltd.
    Inventor: Eiichi Murakami
  • Patent number: 8544344
    Abstract: First and second piezoelectric transducers 2 and 3 are fixed to a tubular main body 1 via first and second fitting bases 4 and 5. On front and rear surfaces of an end portion of each of the first and second piezoelectric transducers 2 and 3 are provided first and second electrodes 6 and 7. When the tubular main body 1 is secured to a circuit box, each of the end portions of the first and second piezoelectric transducers 2 and 3 is inserted between first and second contact members provided on the circuit box such that the first and second electrodes 6 and 7 are electrically connected to the first and second contact members, respectively to connect the first and second piezoelectric transducers 2 and 3 to the circuit box by one touch operation.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: October 1, 2013
    Assignee: Atsuden Co., Ltd.
    Inventor: Eiichi Murakami
  • Publication number: 20130118272
    Abstract: First and second piezoelectric transducers 2 and 3 are fixed to a tubular main body 1 via first and second fitting bases 4 and 5. On front and rear surfaces of an end portion of each of the first and second piezoelectric transducers 2 and 3 are provided first and second electrodes 6 and 7. When the tubular main body 1 is secured to a circuit box, each of the end portions of the first and second piezoelectric transducers 2 and 3 is inserted between first and second contact members provided on the circuit box such that the first and second electrodes 6 and 7 are electrically connected to the first and second contact members, respectively to connect the first and second piezoelectric transducers 2 and 3 to the circuit box by one touch operation.
    Type: Application
    Filed: November 15, 2011
    Publication date: May 16, 2013
    Applicant: ATSUDEN CO., LTD.
    Inventor: Eiichi MURAKAMI
  • Publication number: 20120318069
    Abstract: An ultrasonic flowmeter apparatus, which can be mounted on a conduit flowing a fluid whose flow rate is to be measured, has two housing halves coupled swingably about an axis. Free ends of the housing halves include a clamp mechanism for closing and locking the halves in position. The halves have formed therein grooves 1a and 2a, respectively, and a pair of ultrasonic wave transmission and reception elements are provided on an inner wall of the groove 1a. When the conduit is clamped between the grooves, the conduit is urged against the inner walls and deformed into a substantially square cross sectional configuration. An ultrasonic wave beam B is projected from one of the elements into a fluid passing through the conduit, the beam is reflected by an opposite surface of the conduit urged against the groove 2a, and the reflected beam is received by the other element.
    Type: Application
    Filed: June 20, 2011
    Publication date: December 20, 2012
    Applicant: Atsuden Co., Ltd.
    Inventor: Eiichi Murakami
  • Publication number: 20120272747
    Abstract: [Problem] A flow rate measuring device in which guided waves are used, wherein the frequency of ultrasound is optimized; and energy injected from ultrasound transmission/reception elements is increased and the flow velocity sensitivity is raised; whereby the measurement accuracy is improved. [Solution] A frequency of an isolated peak of group velocities of guided waves, from among a plurality of peaks of group velocities of guided waves, and a resonance frequency of the ultrasound transmission element/reception element are set to agree; and the semi-amplitude of a power spectrum of ultrasound excited/received by the ultrasound transmission element/reception element is set to a value that does not overlap with another peak of group velocities.
    Type: Application
    Filed: November 5, 2010
    Publication date: November 1, 2012
    Inventors: Harumichi Sato, Jun Akedo, Eiichi Murakami