Patents by Inventor Hiroshi Hamada

Hiroshi Hamada 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: 20190265795
    Abstract: A vibration generating device 90 for non-acoustic applications, includes: a piezoelectric element 11; a diaphragm 82 attached to the piezoelectric element 11 on a first side in a first direction; and a first frame body 84 provided along an outer peripheral portion of the diaphragm 82 to transmit vibration of the diaphragm 82 to a vibration object member 60, wherein the first frame body 84 is connectable to the vibration object member 60 in such a manner that the first frame body 84, the diaphragm 82 and the vibration object member 60 form an enclosed space 64.
    Type: Application
    Filed: February 14, 2019
    Publication date: August 29, 2019
    Inventors: Shigeo ISHII, Takashi TOMITA, Hiroshi HAMADA, Fumihisa ITO, Yukihiro MATSUI
  • Publication number: 20190267535
    Abstract: A vibration generating device 10 includes: a diaphragm 11; and a first piezoelectric actuator 12 and a second piezoelectric actuator 13 attached on an upper surface 11a and a lower surface 11b of the diaphragm 11, respectively, so as to sandwich the diaphragm 11 therebetween in a vicinity of an end surface of the diaphragm 11, wherein, in a top view of the upper surface 11a of the diaphragm 11, the first piezoelectric actuator 12 is disposed at a position shifted with respect to the second piezoelectric actuator 13.
    Type: Application
    Filed: February 15, 2019
    Publication date: August 29, 2019
    Inventors: Hiroshi HAMADA, Yukihiro MATSUI, Fumihisa ITO, Takashi TOMITA
  • Patent number: 10393972
    Abstract: The optical subassembly includes a photodetector including element terminal groups for light-receiving elements, and an electric signal controller including IC terminal groups, wherein any one of the element terminal group and the IC terminal group has a two-terminal configuration, and the other one has a three-terminal configuration, wherein, in a case where terminal groups at both ends where center positions thereof are disposed on the inner side together and have the two-terminal configuration, the first connection terminals are disposed on the outer side than a second connection terminals in the two-terminal configuration, and in a case where terminal groups at both ends where center positions thereof are on the outer side together and have the two-terminal configuration, a first connection terminal in the two-terminal configuration is disposed on the inner side than the second connection terminal.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: August 27, 2019
    Assignee: Lumentum Japan, Inc.
    Inventors: Takashi Toyonaka, Hiroshi Hamada
  • Patent number: 10340610
    Abstract: A female terminal (30) to be connected to an end of a wire (20) in which a core (21) is covered with an insulation coating (22), and the wire (20) being pulled out rearward therefrom. The female terminal (30) includes two coating crimping pieces (39) extending in opposite lateral directions intersecting a pull-out direction of the wire (20) and to be crimped to an outer peripheral surface of the insulation coating (22). Compressing portions (41) are formed on the surface of each coating crimping piece (39) that faces the insulation coating (22) and are disposed adjacent a front edge of each coating crimping piece (39). Each compressing portion has an internal space narrowed toward a rear end from the front edge of the coating crimping piece (39).
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: July 2, 2019
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Hiroshi Hamada, Takanobu Shimada
  • Patent number: 10230008
    Abstract: Provided are a semiconductor light receiving device, an optical receiver module, and a manufacturing method thereof in which characteristics of the device are improved when the device has a structure in which a mesa structure including layers formed of a common material is buried by a buried layer. The semiconductor light receiving device includes the mesa structure including the layers formed of a commonmaterial, the layers including an absorbing layer, the mesa structure being buried by the buried layer formed so as to surround side surfaces of the mesa structure. The mesa structure has a cross section having a forwardly tapered portion and a reversely tapered portion.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: March 12, 2019
    Assignee: Oclaro Japan, Inc.
    Inventors: Masahiro Ebisu, Hiroshi Hamada, Yasushi Sakuma, Shigenori Hayakawa
  • Patent number: 10224647
    Abstract: A wire with terminal includes a wire in which a core is covered with a coating, and a terminal 20 including a wire barrel 24 to be crimped to the core exposed from the coating of the wire and an insulation barrel 26 to be crimped to the coating of the wire. The wire is pulled rearwardly from the terminal. Recesses 26B are provided on a surface of the insulation barrel 26 to be crimped and openings of the recesses 26B are shaped to become narrower toward a rear side. As the wire is pulled more rearwardly, the coating penetrating into the recesses 26B moves rearwardly of the recesses 26B to be compressed and hardened and becomes less likely to come out of the recesses 26B. Thus, impact strength can be enhanced.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: March 5, 2019
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
    Inventors: Hiroshi Hamada, Satoshi Morikawa, Takehiro Nakata, Takuji Otsuka, Takanobu Shimada
  • Patent number: 10204955
    Abstract: Provided is a back illuminated photo detector enabling easy determination of whether or not the radius of a beam spot on a light absorption layer is an appropriate size. The back illuminated photo detector includes: a semiconductor substrate having a first surface for receiving light; a semiconductor layer that is laminated on a second surface and includes a light absorption layer; a passivation film so as to expose a contact portion that is part of an upper surface of the semiconductor layer; and an electrode that is in contact with the semiconductor layer in the contact portion, and has a reflectance lower than that of the passivation film. The contact portion includes a center portion located on an optical axis, and an area of the center portion is smaller than a design cross-sectional area of a beam spot.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: February 12, 2019
    Assignee: Oclaro Japan, Inc.
    Inventors: Hiroshi Hamada, Takashi Toyonaka
  • Publication number: 20190044053
    Abstract: A multilayer piezoelectric element includes a ceramic body formed by a piezoelectric ceramic, and having first and second end face facing a longitudinal direction, first and second principal faces facing a thickness direction perpendicular to the longitudinal direction. A pair of external electrodes cover the first and second end faces, extend from the first and second end faces onto the first principal face via ridge parts connecting the end faces with the principal faces, and project in the thickness direction on the first principal face. Multiple internal electrodes are stacked inside the ceramic body and are connected alternately to the pair of external electrodes along the thickness direction. A surface electrode is provided on at least one of the first and second principal faces, and connected to the external electrode different from the one to which the internal electrode adjacent in the thickness direction is connected.
    Type: Application
    Filed: July 30, 2018
    Publication date: February 7, 2019
    Inventors: Hiroshi HAMADA, Hiroyuki SHIMIZU, Sumiaki KISHIMOTO, Yukihiro MATSUI, Shigeo ISHII, Tomohiro HARADA, Yukihiro KONISHI
  • Publication number: 20190037319
    Abstract: An electroacoustic transducer includes a dynamic speaker that generates a first acoustic sound, and a piezoelectric speaker that generates a second acoustic sound. The sum of the sound pressures of the first and second acoustic sounds in a crossover frequency range of the sound pressure of the first acoustic sound and the sound pressure of the second acoustic sound, is adjusted to be equal to or greater than 0.5 times the sound pressure of the first acoustic sound in the crossover frequency range so as to improve the acoustic properties in the crossover frequency range.
    Type: Application
    Filed: July 24, 2018
    Publication date: January 31, 2019
    Inventors: Shigeo ISHII, Hiroshi HAMADA, Yutaka DOSHIDA, Takashi TOMITA
  • Publication number: 20190027678
    Abstract: A multilayer piezoelectric element includes a ceramic base body, a pair of external electrodes, multiple internal electrodes, and surface electrodes. The pair of external electrodes cover a pair of end faces and extend from the pair of end faces along a pair of principal faces and a pair of side faces. The multiple internal electrodes are stacked inside the ceramic base body along the thickness direction, and are connected alternately to one or the other of the pair of external electrodes along the thickness direction. The surface electrodes extend from the pair of external electrodes along the pair of principal faces, and are each divided in the longitudinal direction at a position near, of the pair of external electrodes, the external electrode to which the internal electrode adjacent to the principal face is connected.
    Type: Application
    Filed: July 12, 2018
    Publication date: January 24, 2019
    Inventors: Sumiaki KISHIMOTO, Hiroshi HAMADA, Hiroyuki SHIMIZU, Yukihiro MATSUI, Tomohiro HARADA, Yukihiro KONISHI
  • Patent number: 10165371
    Abstract: In an embodiment, an electronic device 1 has a panel 20, a housing 10 that holds the panel 20, and a piezoelectric element 30 installed on the rear side of the panel 20, wherein the piezoelectric element 30 is installed at a position that allows for the vibration amplitude of the panel 20 to become the highest on the side closer to the center of the panel 20 in the longitudinal direction from the installed position of the piezoelectric element 30. The electronic device is capable of causing an entire panel to vibrate in a stable manner.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: December 25, 2018
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Shigeo Ishii, Yukihiro Matsui, Hiroshi Hamada, Keiichi Kobayashi
  • Patent number: 10147668
    Abstract: A stacked cooler includes flow pipes that are stacked, each of the flow pipes having a flat shape and including a medium passage in which a heat medium flows, a heat exchange object that is disposed between each adjacent two of the flow pipes and is clamped between their flat planes, a protruding pipe part that is connected to at least one of the flow pipes and protrudes in a stacking direction of the flow pipes, and a load restraining part that restrains a load applied to a connection portion of the at least one of the flow pipes to the protruding pipe part as compared with a load applied to the other portion of the at least one of the flow pipes.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: December 4, 2018
    Assignee: DENSO CORPORATION
    Inventors: Yasuhiro Mizuno, Isao Tamada, Tomohiro Shimazu, Hiroshi Hamada, Yuusuke Takagi, Eiji Nakagawa
  • Patent number: 10121956
    Abstract: An electroacoustic transducer includes: a polygonal-shaped laminated piezoelectric element including alternately stacked piezoelectric layers and electrode layers, with the piezoelectric layers placed between at least one pair of electrode layers having different polarities; and a circular vibration plate on which the laminated piezoelectric element is placed. Of the piezoelectric layers sandwiched between the at least one pair of electrode layers, the total volume (V) of those effective layers that overlap the at least one pair of electrode layers as viewed from the stacking direction satisfies the condition below: 0.2?R2×ts?V?2.0?R2×ts wherein ? represents the ratio of the circumference of a circle to its diameter, R represents the radius of the vibration plate, and ts represents the thickness of the vibration plate.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: November 6, 2018
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Takashi Tomita, Shigeo Ishii, Hiroshi Hamada, Yutaka Doshida
  • Publication number: 20180291888
    Abstract: A control valve includes: a body having a control chamber communication port and a suction chamber communication port; a valve element that moves toward and away from a valve hole to close and opening a bleed valve, the ports communicating with each other through the valve hole; a solenoid to generate a drive force in an opening direction of the bleed valve; and a pressure sensing element to sense a pressure in the suction chamber or a pressure in the control chamber, and generate a counterforce against the drive force from the solenoid depending on a magnitude of the sensed pressure. An opening degree of the bleed valve is controlled so that the sensed pressure becomes a set pressure. A bleed passage for delivering the refrigerant introduced through the control chamber communication port to the suction chamber even while the bleed valve is in a closed state is formed.
    Type: Application
    Filed: April 4, 2018
    Publication date: October 11, 2018
    Inventors: Masaaki TONEGAWA, Hiroshi HAMADA
  • Patent number: 10069217
    Abstract: A terminal 20 disclosed by this specification is crimped to a wire 30, in which a core 31 is covered with an insulation coating 32, with the wire 30 pulled out rearward, and includes a core crimping portion 40 to be crimped to the core 31 and a coating crimping portion 50 to be crimped to the insulation coating 32. The coating crimping portion 50 in a state crimped to the insulation coating 32 includes flat portions 55 extending flat in a pull-out direction of the wire 30 and a projection 52 projecting more toward the core 31 than the flat portions 55 and having a projecting amount increased toward a rear side.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: September 4, 2018
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventor: Hiroshi Hamada
  • Publication number: 20180249255
    Abstract: An electroacoustic transducer includes a piezoelectric speaker and a housing. The piezoelectric speaker has: a first vibration plate with a periphery; a piezoelectric element placed on at least one face of the first vibration plate; and multiple openings that are provided around the piezoelectric element and penetrate through the first vibration plate in its thickness direction that is a first axis direction. The housing has: a supporting part that directly or indirectly supports the periphery; and a sound introduction port that faces the piezoelectric speaker in the first axis direction. The sound introduction port is provided at a position where it does not overlap, in the first axis direction, a first opening having the largest open area among the multiple openings. The electroacoustic transducer can improve the acoustic characteristics of a piezoelectric speaker.
    Type: Application
    Filed: February 22, 2018
    Publication date: August 30, 2018
    Inventors: Shigeo ISHII, Hiroshi HAMADA, Yutaka DOSHIDA, Takashi TOMITA
  • Publication number: 20180135610
    Abstract: A control valve includes: a first valve to control a flow rate of refrigerant flowing from a discharge chamber to a control chamber of a compressor; a second valve to control a flow rate of the refrigerant flowing from the control chamber to a suction chamber; a solenoid to generate a drive force in a first valve closing direction and a second valve opening direction; a biasing member to generate a biasing force in an first valve opening direction and a second valve closing direction; and a pressure sensing part to sense a pressure in the suction chamber or the control chamber, and generate a counterforce against the drive force.
    Type: Application
    Filed: January 15, 2018
    Publication date: May 17, 2018
    Inventors: Kazuhiro IRIE, Masaaki TONEGAWA, Hiroshi HAMADA
  • Publication number: 20180138600
    Abstract: A terminal that is connected to an end of an aluminum electric wire obtained by covering core wires with an insulating cover. The terminal is provided with a pair of insulation barrel pieces (crimping pieces) that extend in directions that intersect the longitudinal direction of the aluminum electric wire, and are crimped to the outer circumferential surface of the insulating cover. The pair of insulation barrel pieces have tip end portions that face and abut against each other in a state in which the pair of insulation barrel pieces are crimped to the insulating cover.
    Type: Application
    Filed: March 30, 2016
    Publication date: May 17, 2018
    Applicants: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd, SUMITOMO ELECTRIC INDUSTRIES, LTD
    Inventors: Takanobu SHIMADA, Takuji OOTSUKA, Yoshihisa YOKOYAMA, Takahiko HAMAGUCHI, Takehiro NAKATA, Satoshi MORIKAWA, Hiroshi HAMADA, Hiroki HIRAI, Junichi ONO
  • Patent number: 9972920
    Abstract: A terminal that is connected to an end of an aluminum electric wire obtained by covering core wires with an insulating cover. The terminal is provided with a pair of insulation barrel pieces (crimping pieces) that extend in directions that intersect the longitudinal direction of the aluminum electric wire, and are crimped to the outer circumferential surface of the insulating cover. The pair of insulation barrel pieces have tip end portions that face and abut against each other in a state in which the pair of insulation barrel pieces are crimped to the insulating cover.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: May 15, 2018
    Assignees: AutoNetworks Technologies, Ltd., Sumitomo Wiring Systems, Ltd, SUMITOMO ELECTRIC INDUSTRIES, LTD
    Inventors: Takanobu Shimada, Takuji Ootsuka, Yoshihisa Yokoyama, Takahiko Hamaguchi, Takehiro Nakata, Satoshi Morikawa, Hiroshi Hamada, Hiroki Hirai, Junichi Ono
  • Patent number: 9973857
    Abstract: A piezoelectric speaker has a piezoelectric element and vibration plate. The piezoelectric element has a base body with a mounting surface, as well as first and second terminals that are formed on the mounting surface with a distance between them. The vibration plate has a conductive body joined to the piezoelectric element and having a principle surface facing the mounting surface, as well as a first hole with or without a bottom which is formed on the principle surface in a region facing the first terminal to form a space between the body and first terminal. The piezoelectric speaker is capable of preventing the external electrodes of the piezoelectric element from shorting to each other.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: May 15, 2018
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Yasukazu Tokuhisa, Takashi Tomita, Hiroshi Hamada, Shigeo Ishii, Yutaka Doshida, Yoshiyuki Watanabe