Patents by Inventor Yoichi Hashimoto

Yoichi Hashimoto 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: 20210066873
    Abstract: A method of manufacturing an electrical connector includes: contacting an end portion of a center conductor exposed in an end portion of a coaxial cable having the center conductor with a conductive contact; applying ultrasonic vibration to the end portion of the center conductor and the contact to join the end portion of the center conductor and the contact each other; and accommodating the contact in an insulation housing after the end portion of the center conductor and the contact are joined to each other, and covering at least a part of a joint of the end portion of the center conductor and the contact with the insulation housing.
    Type: Application
    Filed: August 28, 2020
    Publication date: March 4, 2021
    Inventors: Hirofumi TAKAO, Yoichi HASHIMOTO, Li Yao LIN
  • Patent number: 10038261
    Abstract: A plug connector includes a signal contact conductor to which an internal conductor of a coaxial cable is connected, a ground contact conductor to which an external conductor of the coaxial cable is connected, and an insulating housing that insulates the signal contact conductor from the ground contact conductor. The insulating housing includes an insulating main body in which the signal contact conductor is held and a protrusion that protrudes from a peripheral surface of the insulating main body in a radially outward direction of the insulating main body. The protrusion includes a base portion on which an insulator and the external conductor of the coaxial cable are placed and a pair of walls that are erected on the base portion and are disposed to interpose at least a tip of the external conductor therebetween.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: July 31, 2018
    Assignee: Dai-Ichi Seiko Co., Ltd.
    Inventor: Yoichi Hashimoto
  • Patent number: 9997864
    Abstract: A plug connector includes: a ground contact conductor; an insulating housing; and a signal contact conductor. The ground contact conductor includes: a cylindrical main body having a slit that extends in an extending direction thereof; a pair of arms protruding from respective edges forming the slit of the main body in a radially outward direction of the main body; and fixing portions configured to fasten around the pair of arms from the exterior. Each fixing portion is provided with a protrusion protruding toward the corresponding arm and positioned at the center of the fixing portion in a protruding direction of the arms. In a state in which the arms are fastened with the fixing portions, the protrusions are in contact with the arms, and the arms and the fixing portions are separated from each other by the presence of the protrusions.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: June 12, 2018
    Assignee: DAI-ICHI SEIKO CO., LTD.
    Inventor: Yoichi Hashimoto
  • Publication number: 20180102598
    Abstract: A coaxial cable connector comprises a signal contact member having an inner conductor connecting portion, a grounding contact member, and an insulating housing for supporting the signal contact member and the grounding contact member in a condition of mutual isolation, wherein the insulating housing is provided with a concavity which has a bottom on which the inner conductor connecting portion of the signal contact member is placed and an opening through which the inner conductor of the coaxial cable is caused to come into contact with the inner conductor connecting portion of the signal contact member placed on the bottom of the concavity and is operative to allow an ultrasonic vibration horn to be put into the concavity through the opening of the concavity for applying ultrasonic vibrations to the inner conductor of the coaxial cable put in contact with the inner conductor connecting portion of the signal contact member.
    Type: Application
    Filed: August 17, 2017
    Publication date: April 12, 2018
    Applicant: DAI-ICHI SEIKO CO., LTD.
    Inventors: Yoichi HASHIMOTO, Kenichi YOTSUTANI
  • Publication number: 20180102616
    Abstract: A coaxial cable connector comprises a signal contact member having an inner conductor connecting portion, a grounding contact member, and an insulating housing for supporting the signal contact member and the grounding contact member in a condition of mutual isolation, wherein the insulating housing is provided with first and second holes opposite to each other across the inner conductor connecting portion of the signal contact member with which an inner conductor of a coaxial cable is in contact, the first hole is operative to allow an ultrasonic vibration horn to be put into the first hole for contacting with the inner conductor of the coaxial cable and applying ultrasonic vibrations to the same and the second hole is operative to allow an anvil to be put into the second hole for coming into contact with the inner conductor connecting portion of the signal contact member.
    Type: Application
    Filed: August 17, 2017
    Publication date: April 12, 2018
    Applicant: DAI-ICHI SEIKO CO., LTD.
    Inventors: Yoichi HASHIMOTO, Kenichi YOTSUTANI
  • Patent number: 9941606
    Abstract: A coaxial cable connector comprises a signal contact member having an inner conductor connecting portion, a grounding contact member, and an insulating housing for supporting the signal contact member and the grounding contact member in a condition of mutual isolation, wherein the insulating housing is provided with a concavity which has a bottom on which the inner conductor connecting portion of the signal contact member is placed and an opening through which the inner conductor of the coaxial cable is caused to come into contact with the inner conductor connecting portion of the signal contact member placed on the bottom of the concavity and is operative to allow an ultrasonic vibration horn to be put into the concavity through the opening of the concavity for applying ultrasonic vibrations to the inner conductor of the coaxial cable put in contact with the inner conductor connecting portion of the signal contact member.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: April 10, 2018
    Assignee: DAI-ICHI SEIKO CO., LTD.
    Inventors: Yoichi Hashimoto, Kenichi Yotsutani
  • Patent number: 9941646
    Abstract: A coaxial cable connector comprises a signal contact member having an inner conductor connecting portion, a grounding contact member, and an insulating housing for supporting the signal contact member and the grounding contact member in a condition of mutual isolation, wherein the insulating housing is provided with first and second holes opposite to each other across the inner conductor connecting portion of the signal contact member with which an inner conductor of a coaxial cable is in contact, the first hole is operative to allow an ultrasonic vibration horn to be put into the first hole for contacting with the inner conductor of the coaxial cable and applying ultrasonic vibrations to the same and the second hole is operative to allow an anvil to be put into the second hole for coming into contact with the inner conductor connecting portion of the signal contact member.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: April 10, 2018
    Assignee: DAI-ICHI SEIKO CO., LTD.
    Inventors: Yoichi Hashimoto, Kenichi Yotsutani
  • Publication number: 20180069335
    Abstract: A plug connector includes: a ground contact conductor; an insulating housing; and a signal contact conductor. The ground contact conductor includes: a cylindrical main body having a slit that extends in an extending direction thereof; a pair of arms protruding from respective edges forming the slit of the main body in a radially outward direction of the main body; and fixing portions configured to fasten around the pair of arms from the external. Each fixing portion is provided with a protrusion protruding toward the corresponding arm and positioned at the center of the fixing portion in a protruding direction of the arms. In a state in which the arms are fastened with the fixing portions, the protrusions are contact with the arms, and the arms and the fixing portions are separated from each other by presence of the protrusions.
    Type: Application
    Filed: August 28, 2017
    Publication date: March 8, 2018
    Applicant: DAI-ICHI SEIKO CO., LTD.
    Inventor: Yoichi HASHIMOTO
  • Publication number: 20170346209
    Abstract: A plug connector includes a signal contact conductor to which an internal conductor of a coaxial cable is connected, a ground contact conductor to which an external conductor of the coaxial cable is connected, and an insulating housing that insulates the signal contact conductor from the ground contact conductor. The insulating housing includes an insulating main body in which the signal contact conductor is held and a protrusion that protrudes from a peripheral surface of the insulating main body in a radially outward direction of the insulating main body. The protrusion includes a base portion on which an insulator and the external conductor of the coaxial cable are placed and a pair of walls that are erected on the base portion and are disposed to interpose at least a tip of the external conductor therebetween.
    Type: Application
    Filed: May 23, 2017
    Publication date: November 30, 2017
    Applicant: DAI-ICHI SEIKO CO., LTD.
    Inventor: Yoichi HASHIMOTO
  • Patent number: 9705631
    Abstract: In a digital coherent communication scheme utilizing polarization-multiplexed optical signals, it may be impossible to separate transmission light and reception light from each other with high precision for transmission/reception an optical signal. An optical space transmission system according to the present invention is provided with a first transmission/reception device which radiates first reception light and second reception light whose polarization states are orthogonal to each other, and a second transmission/reception device which radiates third reception light alternately including a first reception light component whose polarization state is the same as the first reception light and a second reception light component whose polarization state is the same as the second reception light in a time-wise manner.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: July 11, 2017
    Assignee: NEC CORPORATION
    Inventor: Yoichi Hashimoto
  • Patent number: 9502834
    Abstract: Good signal transmission characteristics can be stably obtained by a simple configuration. A void portion formed by inner wall surfaces of a groove disposed so as to face a wire connection part of a cable-shaped signal transmission medium and an inner conductor contact is provided in part of an insulative pressing plate, which is opened/closed integrally with a shell cover portion, and the wire connection part thereof and the void portion are disposed in a radial-direction inner region of a shield shell. As a result, an air layer for impedance adjustment formed by the void portion of the insulative pressing plate is disposed so as to face the wire connection part, at which mismatching of impedance easily occurs, and the matching degree (VSWR) of impedance can be efficiently adjusted.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: November 22, 2016
    Assignee: DAI-ICHI SEIKO CO., LTD.
    Inventor: Yoichi Hashimoto
  • Patent number: 9431833
    Abstract: A battery system according to the present invention includes a secondary battery; a battery control unit that controls charging and discharging of said secondary battery; and a charging/discharging management unit that controls the charging and discharging of said secondary battery through said battery control unit, wherein said battery control unit, if an abnormality occurred during operation of said battery control unit, transmits remaining capacity data that represent a remaining capacity of said secondary battery that remained immediately before the abnormality occurred to said charging/discharging management unit.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: August 30, 2016
    Assignee: NEC ENERGY DEVICES, LTD.
    Inventors: Yoichi Hashimoto, Hiroaki Ueno
  • Publication number: 20160218471
    Abstract: Good signal transmission characteristics can be stably obtained by a simple configuration. A void portion formed by inner wall surfaces of a groove disposed so as to face a wire connection part of a cable-shaped signal transmission medium and an inner conductor contact is provided in part of an insulative pressing plate, which is opened/closed integrally with a shell cover portion, and the wire connection part thereof and the void portion are disposed in a radial-direction inner region of a shield shell. As a result, an air layer for impedance adjustment formed by the void portion of the insulative pressing plate is disposed so as to face the wire connection part, at which mismatching of impedance easily occurs, and the matching degree (VSWR) of impedance can be efficiently adjusted.
    Type: Application
    Filed: January 12, 2016
    Publication date: July 28, 2016
    Applicant: DAI-ICHI SEIKO CO., LTD.
    Inventor: Yoichi HASHIMOTO
  • Patent number: 9240858
    Abstract: In order to perform the polarization demultiplexing of the polarization multiplexed BPSK signal using a small-scale circuit by means of optical phase modulation of the polarization multiplexed BPSK signal into the pseudo polarization multiplexed QPSK signal, an optical communication system for communicating by using polarization multiplexed optical signals includes an optical phase modulation means for modulating phases of a plurality of optical signals employing BPSK modulation system including information to be communicated, and for generating a plurality of optical signals to become signals by pseudo QPSK modulation system; and a signal restoration means for performing polarization demultiplexing of a plurality of polarization multiplexed optical signals from a plurality of optical signals modulated into the pseudo QPSK modulation system, and for restoring the information to be communicated.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: January 19, 2016
    Assignee: NEC CORPORATION
    Inventors: Kazuomi Endo, Yoichi Hashimoto
  • Publication number: 20160013882
    Abstract: In a digital coherent communication scheme utilizing polarization-multiplexed optical signals, it may be impossible to separate transmission light and reception light from each other with high precision for transmission/reception an optical signal. An optical space transmission system according to the present invention is provided with a first transmission/reception device which radiates first reception light and second reception light whose polarization states are orthogonal to each other, and a second transmission/reception device which radiates third reception light alternately including a first reception light component whose polarization state is the same as the first reception light and a second reception light component whose polarization state is the same as the second reception light in a time-wise manner.
    Type: Application
    Filed: March 3, 2014
    Publication date: January 14, 2016
    Applicant: NEC Corporation
    Inventor: Yoichi HASHIMOTO
  • Patent number: 9166305
    Abstract: Good signal transmission characteristics can be stably obtained by a simple structure. A pressure-contact surface of a cover inner surface of a shell cover part 13b, which is openably/closably coupled to a cylindrical opening of an external conductor shell 13a, and an insulative pressing plate 11d is provided with a void part 14, which separates at least one of them from the other one. By virtue of this, it is configured that the characteristic impedance about the cable-shaped signal transmission medium SC can be adjusted by the void part 14, and the matching degree (VSWR) of the characteristic impedance with respect to transmission signals can be easily and appropriately matched.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: October 20, 2015
    Assignee: DAI-ICHI SEIKO CO., LTD.
    Inventors: Yoichi Hashimoto, Hiroyuki Kon
  • Patent number: 9154232
    Abstract: In order to allow reception in which receive sensitivity does not depend upon polarization state in reception of a multi-level phase optical signal, in this optical reception method, a multi-level phase optical signal of a single polarization is separated into a first optical signal and a second optical signal of which polarizations are mutually orthogonal, the ratio of the power of the first optical signal to the power of the second signal is calculated, and the difference between the phase of the first optical signal and the phase of second optical signal is calculated as an amount of compensation, whereupon, on the basis of the ratio and the amount of compensation, the first optical signal and the second optical signal are combined using a maximal ratio combining method, and the amount of compensation is modified on the basis of the ratio.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: October 6, 2015
    Assignee: NEC CORPORATION
    Inventors: Kazuomi Endo, Yoichi Hashimoto
  • Patent number: 9077130
    Abstract: With a simple configuration, increase in size can be avoided, usage durability is improved, and occurrence of insufficient electrical connection caused by dust can be prevented well. A crank part is provided in at least one of both contacts including elastic beam-like members. Both of the contacts are provided with cut-away parts, which substantially increase the span lengths of the elastic beam-like members, and gaps between the contacts and an insulating housing which ensure flexibility of the elastic beam-like members to ensure flexibility and prevent permanent deformation of the contacts while enhancing elasticity of the contacts. Dust which has entered the interior thereof is moved along the crank part to ensure electrical conductivity well, which is an employed configuration.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: July 7, 2015
    Assignee: DAI-ICHI SEIKO CO., LTD.
    Inventors: Yoichi Hashimoto, Takao Yamauchi, Yuma Watanabe
  • Patent number: 8986043
    Abstract: With a simple configuration, plastic deformation of contacts can be prevented while avoiding increase in size, and occurrence of failure in electrical connection due to dust can be well prevented. In an elastic beam-like member of a first-side contact extending like a cantilever in an insulating housing, a bent extending part which substantially increases the span length of the elastic beam-like member is formed to be bent to have a curved shape at a root part serving as a part coupled to a fixing base part. A through hole is formed in a region including at least part of the bent extending part to ensure flexibility while enhancing elasticity of the contact, thereby preventing permanent deformation of the contact. Meanwhile, dust which has entered the equipment is caused to fall through the through hole, thereby ensuring electrical conductivity well.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: March 24, 2015
    Assignee: Dai-Ichi Seiko Co., Ltd.
    Inventors: Takeshi Hirakawa, Yoichi Hashimoto
  • Publication number: 20150044912
    Abstract: Good signal transmission characteristics can be stably obtained by a simple structure. A pressure-contact surface of a cover inner surface of a shell cover part 13b, which is openably/closably coupled to a cylindrical opening of an external conductor shell 13a, and an insulative pressing plate 11d is provided with a void part 14, which separates at least one of them from the other one. By virtue of this, it is configured that the characteristic impedance about the cable-shaped signal transmission medium SC can be adjusted by the void part 14, and the matching degree (VSWR) of the characteristic impedance with respect to transmission signals can be easily and appropriately matched.
    Type: Application
    Filed: August 6, 2014
    Publication date: February 12, 2015
    Applicant: DAI-ICHI SEIKO CO. LTD.
    Inventors: Yoichi HASHIMOTO, Hiroyuki Kon