Patents by Inventor Toshiaki Iwa

Toshiaki Iwa 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: 11181220
    Abstract: A metal diaphragm damper includes disc-shaped damper main body having two diaphragms between which a gas is sealed and each of which is provided with a deformable portion at the center thereof and two regulation members that are disposed outside of the deformable portions of the two diaphragms. The metal diaphragm damper includes a first welding part provided with a first welding layer WD1 that seals an annular periphery portion of the regulation member and an outer edge portion of the diaphragm, and a second welding layer WD1 that seals an annular periphery portion of the other regulation member and an outer edge portion of the other diaphragm. The metal diaphragm damper further includes a second welding part provided with a welding layer WD2 that seals the annular periphery portions of the two regulation members.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: November 23, 2021
    Inventors: Yusuke Sato, Toshiaki Iwa, Yoshihiro Ogawa
  • Publication number: 20210285589
    Abstract: A metal diaphragm damper which is resistant to breakage even if repeated stress is applied is provided. The metal diaphragm damper includes a diaphragm that is disk shaped and has a gas enclosed therein the diaphragm has a deforming action part in a center and an outer periphery fixing part on an outer periphery, the deforming action part is formed into a shape curved toward an exterior of the diaphragm, a folded part is formed in a connecting portion of the deforming action part and the outer periphery fixing part and is opened to an inner diameter side, and the folded part is movable in a radial direction.
    Type: Application
    Filed: September 12, 2017
    Publication date: September 16, 2021
    Inventors: Toshiaki IWA, Yoshihiro OGAWA, Yusuke SATO
  • Publication number: 20210246860
    Abstract: A structure for attaching a metal diaphragm damper, includes a housing, a housing cover that cooperates with the housing to define a space, and a pair of diaphragms each formed in a disk shape, the pair of diaphragms having weld portions on an outer periphery side thereof, the weld portions being welded to each other in an annular shape to form the metal diaphragm damper of which inside is filled with gas, the metal diaphragm damper being attached to the housing and the housing cover so as to be disposed in the space between the housing and the housing cover. The pair of diaphragms is provided with outer peripheral portions on the outer peripheral side of the welded portions, and the outer peripheral portions of the pair of diaphragms are held by the housing and the housing cover in a thickness direction of the pair of diaphragms.
    Type: Application
    Filed: May 17, 2019
    Publication date: August 12, 2021
    Inventors: Toshiaki IWA, Yoshihiro OGAWA, Yusuke SATO
  • Publication number: 20210239080
    Abstract: A damper device includes at least a diaphragm, an opposite member that faces the diaphragm and is connected to the diaphragm in a hermetically sealed state over a circumferential direction, and a deformation-suppressing member that is disposed in a hermetically sealed space defined by the diaphragm and the opposite member. The deformation-suppressing member includes a central portion that includes a concave surface of which a depth is increased toward a center in a radial direction thereof, and protruding portions that are provided closer to an outer peripheral side than the central portion.
    Type: Application
    Filed: May 17, 2019
    Publication date: August 5, 2021
    Inventors: Yusuke SATO, Toshiaki IWA, Yoshihiro OGAWA
  • Publication number: 20210231088
    Abstract: A damper device arranged in a housing space formed between a device main body and a cover member includes a pair of damper bodies each having a plate and a diaphragm and having an enclosed space sealed with gas. A biasing device is provided between the pair of damper bodies arranged facing each other and configured to bias the damper bodies from one side of the device main body and the cover member to the other side of the device main body and the cover member, stay members each extending from an outer peripheral edge portion of each of the damper bodies and brought into contact with other side, and a frame member arranged on one side of the device main body and the cover member and having a stopper portion configured to restrict movement of the damper bodies in the direction of the other side.
    Type: Application
    Filed: May 17, 2019
    Publication date: July 29, 2021
    Inventors: Toshiaki IWA, Yoshihiro OGAWA, Yusuke SATO, Tatsumi OGURI, Yusuke KONDO, Keigo OHATA
  • Publication number: 20210164430
    Abstract: There is provided a damper unit that allows a plurality of damper bodies to be installed by simple work. The damper unit includes at least two damper bodies that are installed in a housing space so as to be stacked and include hermetically sealed spaces therein. The damper unit further an elastic member 7 that is disposed between the damper bodies, and a stopper that is installed across outer peripheral edge portions of the damper bodies positioned at both ends.
    Type: Application
    Filed: May 17, 2019
    Publication date: June 3, 2021
    Inventors: Yusuke SATO, Toshiaki IWA, Yoshihiro OGAWA
  • Publication number: 20210071628
    Abstract: There is provided a damper device that can be held in a housing space with simple work. A damper device, which is disposed and used in a housing space formed in a device unit, includes: a damper body that is filled with gas and includes a diaphragm provided with a deformable-action portion formed at a central portion thereof; and an annular clip that holds an outer peripheral edge portion of the damper body and causes a biasing force to act on an inner wall of a cover member, which forms the housing space, in a radial direction.
    Type: Application
    Filed: May 22, 2019
    Publication date: March 11, 2021
    Inventors: Toshiaki IWA, Yoshihiro OGAWA, Yusuke SATO, Koji SATO, Takayuki KONDO
  • Patent number: 10883462
    Abstract: A damper device is provided in a flow passage of a fluid. The damper device includes a plurality of diaphragm dampers that are stacked together. Each of the plurality of diaphragm dampers includes a first flexible portion, a second flexible portion, and a rim including a welded portion. A peripheral edge of the first flexible portion and a peripheral edge of the second flexible portion are welded together in the welded portion. Each of the plurality of diaphragm dampers is configured to seal a gas in an inner region between the first flexible portion and the second flexible portion. A coupler that couples the plurality of diaphragm dampers together includes holders that hold the rims of the plurality of diaphragm dampers. A gap is provided between the holder of the coupler and the welded portion of each of the plurality of diaphragm dampers.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: January 5, 2021
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION, EAGLE INDUSTRY CO., LTD.
    Inventors: Takeyuki Yabuuchi, Shinichi Sugimoto, Osamu Hishinuma, Hiroatsu Yamada, Toshiaki Iwa, Yoshihiro Ogawa, Yusuke Sato
  • Publication number: 20200355311
    Abstract: A metal diaphragm damper includes disc-shaped damper main body having two diaphragms between which a gas is sealed and each of which is provided with a deformable portion at the center thereof and two regulation members that are disposed outside of the deformable portions of the two diaphragms. The metal diaphragm damper includes a first welding part provide provided with a first welding layer WD1 that seals an annular periphery portion of the regulation member and an outer edge portion of the diaphragm, and a second welding layer WD1 that seals an annular periphery portion of the other regulation member and an outer edge portion of the other diaphragm. The metal diaphragm damper further includes a second welding part provided with a welding layer WD2 that seals the annular periphery portions of the two regulation members.
    Type: Application
    Filed: November 20, 2018
    Publication date: November 12, 2020
    Inventors: Yusuke SATO, Toshiaki IWA, Yoshihiro OGAWA
  • Publication number: 20200355150
    Abstract: Disclosed is a metal diaphragm damper that is hard to fracture even when repeated stress is applied thereto. A disk-shaped metal diaphragm damper is provided with diaphragms each having a deformable portion provided at the center and an outer circumferential fixation portion formed by outer circumferential rims of the diaphragms and that is filled with gas. The deformable portion has a third curved portion located at the radially outward side thereof and formed to be bulged; a first curved portion located radially inward of the third curved portion and formed to be bulged out; and a second curved portion located between the third curved portion and the first curved portion. The second curved portion includes at least one curved wall part which is formed to be dented in.
    Type: Application
    Filed: November 20, 2018
    Publication date: November 12, 2020
    Inventors: Toshiaki IWA, Yoshihiro OGAWA, Yusuke SATO
  • Patent number: 10753331
    Abstract: A coiled wave spring used by a diaphragm damper device and arranged in a fuel chamber defined by a housing and a cover is provided. The coiled wave spring is configured to be arranged between a diaphragm damper of the diaphragm damper device and the cover. The coiled wave spring is configured to fix the diaphragm damper to the housing with its elastic force. The coiled wave spring includes a coil portion, a winding initiation portion, and a winding termination portion. The winding initiation portion and the winding termination portion form flat seat windings. The seat windings each have a larger outer diameter than the coil portion. One of the seat windings is configured to be fixed to the diaphragm damper.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: August 25, 2020
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Toshiaki Iwa, Yoshihiro Ogawa, Yasushi Fujiwara, Yusuke Sato
  • Patent number: 10495041
    Abstract: A holding member for a diaphragm damper device including a plurality of diaphragm dampers is formed from an elastic member. The holding member includes a band that can be elastically tightened to circumferential walls of two adjacent ones of the diaphragm dampers and hooks arranged on two sides of the band. The hooks elastically hold each of the diaphragm dampers that are stacked.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: December 3, 2019
    Assignee: Eagle Industry Co., LTD.
    Inventors: Toshiaki Iwa, Yoshihiro Ogawa, Yasushi Fujiwara, Yusuke Sato
  • Patent number: 10495042
    Abstract: Peripheral sections of two diaphragms are stacked on each other. The peripheral sections of the two diaphragms form an outer rim of a diaphragm damper. The outer rim is continuously sealed and joined by laser welding over the entire circumference of the outer rim. The thickness of the tip of the outer rim is set in correspondence with the spot diameter of a laser beam at the tip of the outer rim. A weld bead is formed by welding in the entire area of the tip of the outer rim.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: December 3, 2019
    Assignee: Eagle Industry Co., LTD.
    Inventors: Toshiaki Iwa, Yoshihiro Ogawa, Yasushi Fujiwara, Yusuke Sato
  • Patent number: 10361422
    Abstract: A current interruption device includes a conductive plate and a first deformable plate. The conductive plate includes a center portion and a peripheral portion surrounding the center portion. An upper surface of the center portion is formed in a planar shape spreading in a first direction and a second direction orthogonal thereto in a conductive state. The peripheral portion includes an inclined portion extending outward from a boundary between the center portion and the peripheral portion. An upper surface of the inclined portion is inclined so as to increase a distance to the first deformable plate as the upper surface of the inclined portion becomes farther away from the center portion when the conductive plate and the first deformable plate are viewed along the first direction or the second direction in the conductive state.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: July 23, 2019
    Assignees: Kabushiki Kaisha Toyota Jidoshokki, Eagle Industry Co., Ltd.
    Inventors: Takayuki Hirose, Mikiya Kurita, Ryuji Oide, Toshiaki Iwa, Yoshihiro Ogawa, Makoto Mitsuyasu, Norimitsu Akiyoshi
  • Patent number: 10340501
    Abstract: A current interruption device includes a first conductive member, a second conductive member, a first deformable member, a second deformable member, and a first seal member. The second conductive member is disposed at a position opposed to the first conductive member. A center portion of the first deformable member is fixed to the second conductive member. The second deformable member is disposed on a side opposite to the first deformable member relative to the second conductive member. The first seal member is disposed between the first conductive member and the second conductive member. A second seal member is disposed between the first conductive member and the casing. A gas permeability between the casing and the first conductive member is equal to or less than a gas permeability between the first conductive member and the second conductive member.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: July 2, 2019
    Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Eagle Industry Co., Ltd.
    Inventors: Atsushi Minagata, Motoaki Okuda, Toshiaki Iwa, Yoshihiro Ogawa, Makoto Mitsuyasu, Norimitsu Akiyoshi
  • Publication number: 20190107167
    Abstract: A metal diaphragm damper is provided that is excellent in pulse absorption performance even with enhanced pressure resistance. The diaphragm damper includes a couple of diaphragms joined to each other at outer edge portions, forming an internal space in which high-pressure gas is sealed. The diaphragms are each formed of a metal thin film. At least one of the diaphragms has a multilayer structure with a plurality of metal thin films layered and fixed at its outer edge portion.
    Type: Application
    Filed: March 21, 2017
    Publication date: April 11, 2019
    Inventors: Toshiaki IWA, Yoshihiro OGAWA, Yusuke SATO
  • Patent number: 10208738
    Abstract: The present invention provides a fuel supply system having improved assembly and pulsation reducing efficiency. A housing (20) of a fuel supply system (1) is formed by joining a first housing member (20a) forming one end side of a tubular chamber (23) in the direction of the backward and forward movement of a plunger (10) and a second housing member (20b) forming the other end side. A pulsation reducing mechanism (60) includes a tubular bellows damper (61) housed in the tubular chamber (23).
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: February 19, 2019
    Assignees: Eagle Industry Co., Ltd., Kelhin Corporation
    Inventors: Kenji Suda, Toshiaki Iwa, Yoshihiro Ogawa, Naoki Murata
  • Patent number: 10077849
    Abstract: A capacity control valve includes: a pressure-sensitive body positioned in a third valve chamber; an adapter provided on the free end of the pressure sensitive body having a circular seating surface; a third valve part that moves integrally with a valve element in the third valve chamber and has a circular engagement surface that opens/closes intake-side passages by engaging with and separating from the seating surface of the adapter. The valve element is located between the first valve chamber and the second valve chamber, and has an outer circumferential face part slidably movable relative to an inner circumferential face of the valve body, with plural threads of screw grooves are formed on the outer circumferential face part.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: September 18, 2018
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Toshiaki Iwa, Yoshihiro Ogawa, Kohei Fukudome, Kenji Moriwaki
  • Publication number: 20180223782
    Abstract: A damper device is provided in a flow passage of a fluid. The damper device includes a plurality of diaphragm dampers that are stacked together. Each of the plurality of diaphragm dampers includes a first flexible portion, a second flexible portion, and a rim including a welded portion. A peripheral edge of the first flexible portion and a peripheral edge of the second flexible portion are welded together in the welded portion. Each of the plurality of diaphragm dampers is configured to seal a gas in an inner region between the first flexible portion and the second flexible portion. A coupler that couples the plurality of diaphragm dampers together includes holders that hold the rims of the plurality of diaphragm dampers. A gap is provided between the holder of the coupler and the welded portion of each of the plurality of diaphragm dampers.
    Type: Application
    Filed: July 28, 2016
    Publication date: August 9, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION, EAGLE INDUSTRY CO., LTD.
    Inventors: Takeyuki YABUUCHI, Shinichi SUGIMOTO, Osamu HISHINUMA, Hiroatsu YAMADA, Toshiaki IWA, Yoshihiro OGAWA, Yusuke SATO
  • Publication number: 20180209389
    Abstract: Peripheral sections of two diaphragms are stacked on each other. The peripheral sections of the two diaphragms form an outer rim of a diaphragm damper. The outer rim is continuously sealed and joined by laser welding over the entire circumference of the outer rim. The thickness of the tip of the outer rim is set in correspondence with the spot diameter of a laser beam at the tip of the outer rim. A weld bead is formed by welding in the entire area of the tip of the outer rim.
    Type: Application
    Filed: July 28, 2016
    Publication date: July 26, 2018
    Applicant: EAGLE INDUSTRY CO., LTD.
    Inventors: TOSHIAKI IWA, YOSHIHIRO OGAWA, YASUSHI FUJIWARA, YUSUKE SATO