Patents by Inventor Keiji Yamaguchi

Keiji Yamaguchi 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: 10322578
    Abstract: A liquid ejection head includes a substrate including an electrically insulating film, an energy generating element provided on the substrate and configured to generate energy used to eject a liquid, a flow path formed through the substrate and communicating with an ejection port configured to eject a liquid, and a wiring layer formed in the electrically insulating film of the substrate, used to drive the energy generating element, provided apart from a wall defining the flow path, and provided to surround the flow path in a plan view of the substrate.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: June 18, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoko Kudo, Takaaki Yamaguchi, Keiji Tomizawa, Masaki Oikawa, Yoshihiro Hamada, Masataka Sakurai
  • Publication number: 20180201323
    Abstract: The present disclosure provides a vehicle body frame structure including: a side rail extending in a vehicle longitudinal direction and disposed so as to face a front tire in a vehicle transverse direction; a cab mount member projecting toward a vehicle transverse direction outer side, from a region of the side rail that is further toward a vehicle rear side than the front tire, and to which a body is mounted; and a projecting portion projecting toward the front tire from a region of the cab mount member that is away from the side rail in the vehicle transverse direction.
    Type: Application
    Filed: December 5, 2017
    Publication date: July 19, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masahiro Onoda, Keiji Yamaguchi, Yoshiki Komatsu, Kento Shigeishi, Takaaki Onodera
  • Patent number: 9809187
    Abstract: A vehicle bumper structure including: bumper reinforcement inside of a bumper cover provided at a front-rear direction outside end of a vehicle; an absorber disposed adjacent to the vehicle front-rear direction outside of the bumper reinforcement; a pedestrian collision detection sensor including a pressure tube extending between the bumper reinforcement and the absorber, bending toward a vehicle lower side at positions of both vehicle width direction end portions of the bumper reinforcement, including a left and right pair of tube end portions extending along a vehicle up-down direction, and outputting a signal according to a change in pressure in the pressure tube; and a reinforcement member, the reinforcement member being provided to a vehicle front-rear direction inside face of the bumper cover, reinforcing the bumper cover, and being disposed in a position superimposed in the vehicle front-rear direction on the tube end portion in plan view.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: November 7, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keiji Yamaguchi, Yasushi Nagaoka, Naoya Higashimachi, Yusuke Mase
  • Publication number: 20170043735
    Abstract: A vehicle bumper structure including: bumper reinforcement inside of a bumper cover provided at a front-rear direction outside end of a vehicle; an absorber disposed adjacent to the vehicle front-rear direction outside of the bumper reinforcement; a pedestrian collision detection sensor including a pressure tube extending between the bumper reinforcement and the absorber, bending toward a vehicle lower side at positions of both vehicle width direction end portions of the bumper reinforcement, including a left and right pair of tube end portions extending along a vehicle up-down direction, and outputting a signal according to a change in pressure in the pressure tube; and a reinforcement member, the reinforcement member being provided to a vehicle front-rear direction inside face of the bumper cover, reinforcing the bumper cover, and being disposed in a position superimposed in the vehicle front-rear direction on the tube end portion in plan view.
    Type: Application
    Filed: June 27, 2016
    Publication date: February 16, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keiji YAMAGUCHI, Yasushi NAGAOKA, Naoya HIGASHIMACHI, Yusuke MASE
  • Patent number: 8875352
    Abstract: A braking structure for a turning body includes an engagement device rotatably engaging a movable-side portion of a rotation damper with a base at a rotation center of the movable-side portion; a first fixing device fixing the movable-side portion relative to the turning body; and a second fixing device fixing a stationary-side portion of the rotation damper relative to the base. The engagement device includes an axis protrusion provided on one side of either the movable-side portion or the base, and a receiving portion provided on the other side of either the movable-side portion or the base, and receiving the axis protrusion from a direction perpendicular to a rotation axis of the rotation. Also, an inserting path for the axis protrusion continuing to the receiving portion is adapted to expand in the direction perpendicular to the rotation axis by an elastic deformation when the inserting path receives the axis protrusion.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: November 4, 2014
    Assignee: Nifco Inc.
    Inventors: Masatora Seto, Keiji Yamaguchi, Shuichi Yuda
  • Patent number: 8376300
    Abstract: An apparatus includes a supporting body, a rotating body assembled with the supporting body and rotating at least between a standard position and a deployed position through an intermediate position, and a biasing device for applying a biasing force to the rotating device in a direction of returning the rotating body to the standard position. A speed switching device changes a rotational speed of the rotating body from the deployed position to the intermediate position different from that from the intermediate position to the standard position in a return rotational movement of the rotating body. The speed switching device includes at least two damping devices; at least two first gears attached to the damping devices for applying damping forces of the damping devices to the rotating body; and at least two second gears formed integrally on the rotating body.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: February 19, 2013
    Assignee: NIFCO Inc.
    Inventors: Ryuhei Nishida, Keiji Yamaguchi, Takehiko Nemoto
  • Patent number: 8308353
    Abstract: An ear thermometer which includes a temperature detection element and infrared detection element arranged near the opening portion of a probe achieves a reduction in manufacturing cost while reducing the influence of thermal shock. This invention provides an ear thermometer incorporating, in a probe, a temperature detection element to detect an environmental temperature and an infrared detection element to detect infrared radiation emitted from a temperature measurement region in an earhole. The probe includes an end face portion having an opening in its distal end, an inner surface portion of a hollow cylindrical member, and an inwardly protruding engaging portion. A detection element housing is fixed to close the opening of the probe and to form an air layer between the detection element housing and the probe.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: November 13, 2012
    Assignee: Terumo Kabushiki Kaisha
    Inventor: Keiji Yamaguchi
  • Publication number: 20120273310
    Abstract: A braking structure for a turning body includes an engagement device rotatably engaging a movable-side portion of a rotation damper with a base at a rotation center of the movable-side portion; a first fixing device fixing the movable-side portion relative to the turning body; and a second fixing device fixing a stationary-side portion of the rotation damper relative to the base. The engagement device includes an axis protrusion provided on one side of either the movable-side portion or the base, and a receiving portion provided on the other side of either the movable-side portion or the base, and receiving the axis protrusion from a direction perpendicular to a rotation axis of the rotation. Also, an inserting path for the axis protrusion continuing to the receiving portion is adapted to expand in the direction perpendicular to the rotation axis by an elastic deformation when the inserting path receives the axis protrusion.
    Type: Application
    Filed: November 12, 2010
    Publication date: November 1, 2012
    Applicant: NIFCO INC.
    Inventors: Masatora Seto, Keiji Yamaguchi, Shuichi Yuda
  • Patent number: 8259196
    Abstract: A comparator includes: a signal input terminal; a capacitor connected between the signal input terminal and a signal line; and a switching transistor for calibration which is turned on/off to periodically charge the capacitor with a voltage difference between a signal voltage and an operating point of the comparator, wherein an on-resistance of the switching transistor which is turned on when performing the charging is dynamically controlled by a control pulse having a limited amplitude.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: September 4, 2012
    Assignee: Sony Corporation
    Inventors: Rei Yoshikawa, Atsushi Suzuki, Keiji Yamaguchi
  • Patent number: 8186638
    Abstract: An apparatus includes a supporting body, a rotating body assembled with the supporting body and rotating at least between a standard position and a deployed position through an intermediate position, and a biasing device for applying a biasing force to the rotating device in a direction of returning the rotating body to the standard position. A speed switching device changes a rotational speed of the rotating body from the deployed position to the intermediate position different from that from the intermediate position to the standard position in a return rotational movement of the rotating body.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: May 29, 2012
    Assignee: NIFCO Inc.
    Inventors: Ryuhei Nishida, Keiji Yamaguchi, Takehiko Nemoto
  • Publication number: 20120104208
    Abstract: An apparatus includes a supporting body, a rotating body assembled with the supporting body and rotating at least between a standard position and a deployed position through an intermediate position, and a biasing device for applying a biasing force to the rotating device in a direction of returning the rotating body to the standard position. A speed switching device changes a rotational speed of the rotating body from the deployed position to the intermediate position different from that from the intermediate position to the standard position in a return rotational movement of the rotating body. The speed switching device includes at least two damping devices; at least two first gears attached to the damping devices for applying damping forces of the damping devices to the rotating body; and at least two second gears formed integrally on the rotating body.
    Type: Application
    Filed: January 12, 2012
    Publication date: May 3, 2012
    Applicant: NIFCO INC.
    Inventors: Ryuhei NISHIDA, Keiji YAMAGUCHI, Takehiko NEMOTO
  • Patent number: 8126672
    Abstract: An ear-type thermometer which measures body temperature using a temperature detection element 21 that detects ambient temperature and an infrared detection element 22 that detects infrared radiation from a measurement site within the aural cavity, the 2 elements housed in a probe 3, wherein the ear-type thermometer comprises a probe cover 10 which can be detachably provided with the probe, a detection switch 60 which detects that the probe cover is attached or detached to the probe, and two temperature conversion coefficients 52a and 52b which corrects body temperature based on the detection result from the two detection elements.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: February 28, 2012
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Keiji Yamaguchi, Hideo Harada
  • Publication number: 20100017163
    Abstract: An ear-type thermometer which measures body temperature using a temperature detection element 21 that detects ambient temperature and an infrared detection element 22 that detects infrared radiation from a measurement site within the aural cavity, the 2 elements housed in a probe 3, wherein the ear-type thermometer comprises a probe cover 10 which can be detachably provided with the probe, a detection switch 60 which detects that the probe cover is attached or detached to the probe, and two temperature conversion coefficients 52a and 52b which corrects body temperature based on the detection result from the two detection elements.
    Type: Application
    Filed: September 25, 2009
    Publication date: January 21, 2010
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Keiji Yamaguchi, Hideo Harada
  • Publication number: 20100002120
    Abstract: A comparator includes: a signal input terminal; a capacitor connected between the signal input terminal and a signal line; and a switching transistor for calibration which is turned on/off to periodically charge the capacitor with a voltage difference between a signal voltage and an operating point of the comparator, wherein an on-resistance of the switching transistor which is turned on when performing the charging is dynamically controlled by a control pulse having a limited amplitude.
    Type: Application
    Filed: June 30, 2009
    Publication date: January 7, 2010
    Applicant: SONY CORPORATION
    Inventors: Rei Yoshikawa, Atsushi Suzuki, Keiji Yamaguchi
  • Publication number: 20090296775
    Abstract: An ear thermometer which includes a temperature detection element and infrared detection element arranged near the opening portion of a probe achieves a reduction in manufacturing cost while reducing the influence of thermal shock. This invention provides an ear thermometer incorporating, in a probe, a temperature detection element to detect an environmental temperature and an infrared detection element to detect infrared radiation emitted from a temperature measurement region in an earhole. The probe includes an end face portion having an opening in its distal end, an inner surface portion of a hollow cylindrical member, and an inwardly protruding engaging portion. A detection element housing is fixed to close the opening of the probe and to form an air layer between the detection element housing and the probe.
    Type: Application
    Filed: August 10, 2009
    Publication date: December 3, 2009
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventor: Keiji YAMAGUCHI
  • Publication number: 20090277735
    Abstract: A rotary damper is provided so that air incorporated into a housing during assembly is, not excessively compressed, whereby a generation of a peculiar sound due to the air incorporated into the housing can be prevented even though the rotor rotates in both directions, and so that the air is stopped and captured in a fixed place whereby influence on the generated torque can be reduced, and irregularity of the torque can be reduced progressively. A rotary damper includes a housing (11, 51), silicon oil housed inside the housing (11, 51), a rotor 31 housed inside the housing (11, 51), and having a shaft member (32) projecting from the housing (11, 51) and having a resistance member (36) moving through the silicon oil (21) inside the housing (11, 51), and an O-ring (61) for preventing leakage of the silicon oil (21) from between the shaft member (32) and the housing (51). A circumferential groove (54) is provided on an inner face of the housing (51) facing the resistance member (36).
    Type: Application
    Filed: December 27, 2006
    Publication date: November 12, 2009
    Inventors: Keiji Yamaguchi, Naoto Jinbo, Shigemitsu Tomita, Syunsuke Okabayashi, Ayako Kitakawa, Bunkin Tou, Yuki Hirano, Kazuyoshi Koizumi, Yoshihisa Takei
  • Publication number: 20090250579
    Abstract: An apparatus includes a supporting body, a rotating body assembled with the supporting body and rotating at least between a standard position and a deployed position through an intermediate position, and a biasing device for applying a biasing force to the rotating device in a direction of returning the rotating body to the standard position. A speed switching device changes a rotational speed of the rotating body from the deployed position to the intermediate position different from that from the intermediate position to the standard position in a return rotational movement of the rotating body.
    Type: Application
    Filed: October 3, 2008
    Publication date: October 8, 2009
    Applicant: NIFCO INC.
    Inventors: Ryuhei Nishida, Keiji Yamaguchi, Takehiko Nemoto
  • Patent number: 5269397
    Abstract: A rotary damper includes a dish-shaped housing having a depression surrounded by a cylindrical wall, a viscous fluid contained in the depression, a damping rotor accommodated in the viscous fluid, and a cap covering the dish-shaped housing with a shaft of the damping rotor projecting through a central hole thereof. The cylindrical wall is provided at the base of its external periphery with a sloped annular portion of downward increasing diameter. A lower edge portion of a circular wall of the cap is contacted with the slope of the sloped annular portion during welding of the cap to the dish-shaped housing.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: December 14, 1993
    Assignee: Nifco Inc.
    Inventors: Masanobu Kawamoto, Keiji Yamaguchi, Norio Tokahashi
  • Patent number: 5092340
    Abstract: An apparatus for achieving a long-term organism signal measurement, for example, an ECG waveform measurement includes measuring means (1) and input means (2) for setting and inputting organism signal analysis data in the measuring means (1). By supplying via the input means (2) organism signal analysis data unique to an organism to be measured into the measuring means (1), there is conducted a learning operation of the characteristics of the organism signals of the subject. Thereafter, the measurement and analysis of the organism signals are achieved for a long period of time by use of the measuring means (1). The measurement is accomplished after the characteristics of the organism signals of the subject are learned, and hence the reliability is increased. In addition, the realtime measurement and analysis are conducted by the measuring means (1) so as to store only abnormal waveforms, which facilitates the judgement thereof to be conducted by a doctor.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: March 3, 1992
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Keiji Yamaguchi, Takafumi Go, Tadashi Fujii, Toshinori Hirano
  • Patent number: D584315
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: January 6, 2009
    Assignee: Nifco Inc.
    Inventor: Keiji Yamaguchi