Patents by Inventor Hiroshi Nagura
Hiroshi Nagura 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).
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Publication number: 20230005689Abstract: An electromagnetic relay device includes a mover, a plunger, and a solenoid unit that causes the plunger to reciprocate. The mover includes a movable contact movable to abut onto or separate from a stationary contact. The plunger causes the mover to reciprocate to accordingly cause the movable contact to abut onto or separate from the stationary contact. A heat-resistant member is interposed between the insulator and the mover. The plunger enables indirect abutment onto the mover through the insulator and the heat-resistant member. A heat-resistant temperature of the heat-resistant member is set to be higher than that of the insulator.Type: ApplicationFiled: September 8, 2022Publication date: January 5, 2023Applicants: DENSO CORPORATION, DENSO ELECTRONICS CORPORATIONInventors: Jun KOMATSU, Hiroshi NAGURA, Naoki UEJIMA
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Publication number: 20230005692Abstract: In an electromagnetic relay device, a mover includes a movable contact movable to abut onto and separate from a stationary contact through a contact region defined between the movable and the stationary contacts. A plunger causes the mover to reciprocate to accordingly cause the movable contact to abut onto or separate from the stationary contact. A solenoid unit of the electromagnetic relay device includes an electromagnetic coil, a movable core, and a support member that slidably supports an outer peripheral surface of a slidable contact portion of the movable core. A movable wall member is located between the slidable contact portion and the contact region. The movable wall member reciprocates together with the plunger. The movable wall member is arranged to occupy a region in the electromagnetic relay device. The region contains at least the slidable contact portion when viewed in the reciprocation direction.Type: ApplicationFiled: September 8, 2022Publication date: January 5, 2023Applicants: DENSO CORPORATION, DENSO ELECTRONICS CORPORATIONInventors: Masahiro TANIMOTO, Mitsugu FUJIWARA, Hiroshi NAGURA, Makoto KAMIYA
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Patent number: 10598440Abstract: A heat exchanger manufacturing method comprising: a welding step of disposing a first weld bead through a thickness of one of the inner and outer plate portions and fusing the first weld bead to other of the inner and outer plate portions for joining together the first and second case halves, to thereby provide the heat exchange tube; and a temporary tacking step of providing a temporarily-assembled end plate/tube unit by temporarily tacking the heat exchange tube to each of the end plates by means of a second weld bead and filling, with the second weld bead, a gap of a generally triangular shape defined, at each of the opposite end portions of the heat exchange tube, by an outer surface of the inner plate portion, an end surface of the outer plate portion and a corresponding one of the end plates.Type: GrantFiled: September 21, 2017Date of Patent: March 24, 2020Assignee: YUTAKA GIKEN CO., LTD.Inventors: Toru Hisanaga, Hiroshi Nagura, Koji Takeda, Kozue Suzuki
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Patent number: 9879919Abstract: A heat exchanger includes a pair of end plates closing opposite ends of a cylindrical core case, and a plurality of heat exchange tubes each supported at opposite end portions by the end plates. The end plates have support holes, and opposite ends of the tubes are inserted into corresponding support holes in the end plates. Each of the tubes is formed by bending a plate material so that opposite side edge portions of the bent plate material are superimposed on each other, one of the superimposed side edge portions, located inward of the other of the superimposed side edge portions, forming an inner plate portion, the other of the superimposed side edge portions forming an outer plate portion, and then welding a weld bead through the thickness of one of the inner and outer plate portions to fuse to the other plate portion.Type: GrantFiled: June 3, 2015Date of Patent: January 30, 2018Assignee: YUTAKA GIKEN CO., LTD.Inventors: Toru Hisanaga, Hiroshi Nagura, Koji Takeda, Kozue Suzuki
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Publication number: 20180017332Abstract: A heat exchanger manufacturing method comprising: a welding step of disposing a first weld bead through a thickness of one of the inner and outer plate portions and fusing the first weld bead to other of the inner and outer plate portions for joining together the first and second case halves, to thereby provide the heat exchange tube; and a temporary tacking step of providing a temporarily-assembled end plate/tube unit by temporarily tacking the heat exchange tube to each of the end plates by means of a second weld bead and filling, with the second weld bead, a gap of a generally triangular shape defined, at each of the opposite end portions of the heat exchange tube, by an outer surface of the inner plate portion, an end surface of the outer plate portion and a corresponding one of the end plates.Type: ApplicationFiled: September 21, 2017Publication date: January 18, 2018Inventors: Toru HISANAGA, Hiroshi NAGURA, Koji TAKEDA, Kozue SUZUKI
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Publication number: 20150369543Abstract: A heat exchanger includes: a pair of end plates closing opposite ends of a cylindrical core case; and a plurality of heat exchange tubes each supported at opposite end portions by the end plates, a first heat medium being caused to flow through the interior of the tubes, each of the tubes being formed by: bending a plate material so that opposite side edge portions of the bent plate material are superimposed on each other, one of the superimposed side edge portions, located inward of the other of the superimposed side edge portions, forming an inner plate portion, the other of the superimposed side edge portions forming an outer plate portion; and then causing a first weld bead, disposed through the thickness of one of the inner and outer plate portions, to be fused to the other plate portion.Type: ApplicationFiled: June 3, 2015Publication date: December 24, 2015Inventors: Toru HISANAGA, Hiroshi NAGURA, Koji TAKEDA, Kozue SUZUKI
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Patent number: 8354906Abstract: An electromagnetic relay includes a case, a base, a magnet coil, a movable member driven by electromagnetic force of the coil, a moving contact, a fixed contact engaged with or disengaged from the moving contact, a fixed contact holding member fixed to the base with the holding member passing therethrough and having a load circuit terminal, and a magnet applying Lorentz force to arc generated between the fixed contact and the moving contact. The case includes a guide part on its region with which arc extended in a Lorentz force application direction collides. The guide part guides arc after the collision to extend arc in a different direction from the application direction. The case includes a case partition wall between the guide part and the base. The holding member has a guide part opposing portion opposed to the guide part. The opposing portion is covered with the case partition wall.Type: GrantFiled: August 25, 2009Date of Patent: January 15, 2013Assignee: Anden Co., Ltd.Inventors: Hiroshi Nagura, Takashi Ito, Masaki Takeyama
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Patent number: 8093974Abstract: An electromagnetic relay includes a housing having an accommodating space therein, a magnet coil in the accommodating space to generate electromagnetic force when energized, a moving contact disposed in the accommodating space and driven by the coil, a fixed contact in the accommodating space, the moving contact engaged with or disengaged from the fixed contact as a result of whether the moving contact is driven or not, a breathing hole formed in the housing to communicate between the accommodating space and an exterior space of the housing, and a flame propagation route along which a flame of flammable gas ignited by arc generated between the moving contact and the fixed contact propagates toward the breathing hole. The route includes a flame extinguishment clearance that is set to have such a gap size that the flame is extinguished when passing through the clearance.Type: GrantFiled: August 31, 2009Date of Patent: January 10, 2012Assignee: Anden Co., Ltd.Inventors: Hiroshi Nagura, Takashi Ito, Masaki Takeyama
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Publication number: 20100066471Abstract: An electromagnetic relay includes a housing having an accommodating space therein, a magnet coil in the accommodating space to generate electromagnetic force when energized, a moving contact disposed in the accommodating space and driven by the coil, a fixed contact in the accommodating space, the moving contact engaged with or disengaged from the fixed contact as a result of whether the moving contact is driven or not, a breathing hole formed in the housing to communicate between the accommodating space and an exterior space of the housing, and a flame propagation route along which a flame of flammable gas ignited by arc generated between the moving contact and the fixed contact propagates toward the breathing hole. The route includes a flame extinguishment clearance that is set to have such a gap size that the flame is extinguished when passing through the clearance.Type: ApplicationFiled: August 31, 2009Publication date: March 18, 2010Applicant: ANDEN CO., LTD.Inventors: Hiroshi Nagura, Takashi Ito, Masaki Takeyama
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Publication number: 20100060394Abstract: An electromagnetic relay includes a case, a base, a magnet coil, a movable member driven by electromagnetic force of the coil, a moving contact, a fixed contact engaged with or disengaged from the moving contact, a fixed contact holding member fixed to the base with the holding member passing therethrough and having a load circuit terminal, and a magnet applying Lorentz force to arc generated between the fixed contact and the moving contact. The case includes a guide part on its region with which arc extended in a Lorentz force application direction collides. The guide part guides arc after the collision to extend arc in a different direction from the application direction. The case includes a case partition wall between the guide part and the base. The holding member has a guide part opposing portion opposed to the guide part. The opposing portion is covered with the case partition wall.Type: ApplicationFiled: August 25, 2009Publication date: March 11, 2010Applicant: ANDEN CO., LTD.Inventors: Hiroshi Nagura, Takashi Ito, Masaki Takeyama