公开(公告)号：US11862417B2

公开(公告)日：2024-01-02

申请号：US17428434

申请日：2019-02-06

Applicant: MEIDENSHA CORPORATION ,  SECHERON SA

Inventor： Kenta Yamamura ,  Takaaki Furuhata ,  Hideki Komatsu ,  Kosuke Hasegawa ,  Tetsuya Kanno ,  Bjorn Fischer ,  Tarek Lamara ,  Claudio Tricarico

IPC: H01H33/662 ,  H01H33/664

CPC classification number: H01H33/662 ,  H01H33/664

Abstract: A vacuum interrupter is equipped with a vacuum container and fixed and movable electrodes provided in the vacuum container. The vacuum container is constructed by hermetically respectively joining fixed-side and movable-side end plates to one and the other end portions of an insulating tube. The insulating tube is equipped at its end portion with a projection portion that projects in an axial direction of the insulating tube along an outer periphery of the insulating tube. The insulating tube is equipped at its end portion with an end plate joining portion that projects from a base end portion of the projection portion inwardly in a radial direction of the insulating tube. The end plate joining portion is equipped on its surface with a metallized layer to which the fixed-side or movable-side end plate is joined by brazing.

公开(公告)号：US10766069B2

公开(公告)日：2020-09-08

申请号：US16307538

申请日：2017-03-15

Applicant: MEIDENSHA CORPORATION

Inventor： Shota Hayashi ,  Keita Ishikawa ,  Kenta Yamamura ,  Kosuke Hasegawa ,  Hideaki Fukuda ,  Akira Sano

IPC: B22F3/10 ,  B22F1/00 ,  B22F3/24 ,  C22C27/06 ,  H01H1/02 ,  H01H1/025 ,  B22F5/00 ,  C22C9/00 ,  C22C1/04 ,  C22C30/02 ,  B22F9/08 ,  H01H33/66 ,  H01H33/664 ,  H01H33/662

Abstract: There is disclosed a method for manufacturing an electrode by pressing and sintering a mixed powder of a solid solution powder of Cr and a heat-resistant element, which contains Cr and the heat-resistant element in a ratio such that Cr is greater than the heat-resistant element by weight, a Cu powder, and a low melting metal powder (Bi, Sn, Se, Pb, etc.). The low melting metal powder of 0.30 weight % to 0.50 weight % is added to a mixed powder of a solid solution powder of Cr and the heat-resistant element and the Cu powder, and then a mixed powder prepared by adding the low melting metal powder is sintered at a temperature of from 1010° C. to 1035° C. As the low melting metal powder, there is used a powder having a median size of from 5 μm to 20 μm.

公开(公告)号：US09719155B2

公开(公告)日：2017-08-01

申请号：US15123398

申请日：2015-02-17

Applicant: MEIDENSHA CORPORATION

Inventor： Kaoru Kitakizaki ,  Keita Ishikawa ,  Shota Hayashi ,  Nobutaka Suzuki ,  Kosuke Hasegawa

IPC: C22C30/02 ,  C22C9/00 ,  B22F3/26 ,  H01H33/664 ,  C22C1/04 ,  C22C27/04 ,  C22C27/06

CPC classification number: C22C1/0425 ,  B22F3/26 ,  B22F2998/10 ,  C22C1/045 ,  C22C9/00 ,  C22C27/02 ,  C22C27/04 ,  C22C27/06 ,  C22C30/02 ,  H01H33/664 ,  B22F1/0003 ,  B22F1/0085 ,  B22F2009/041 ,  B22F3/02 ,  B22F3/10 ,  B22F3/15

Abstract: A composite metal where a phase of particles of solid solution is uniformly dispersed in a Cu phase, the solid solution containing a solid solution of a heat resistant element selected from Mo, W, Ta, Nb, V and Zr and Cr. The composite metal is provided to contain: 20-70% of Cu; 1.5-64% of Cr; and 6-76% of a heat resistant element by weight relative to the composite metal, wherein a remainder is comprised of inevitable impurities. In the composite metal, the particles of the solid solution, contained in the composite metal, are provided to have an average particle diameter of not larger than 20 μm and to uniformly disperse in the Cu phase with an index of the dispersion state of not higher than 1.0.

公开(公告)号：US10361039B2

公开(公告)日：2019-07-23

申请号：US15751595

申请日：2016-08-10

Applicant: MEIDENSHA CORPORATION

Inventor： Keita Ishikawa ,  Kenta Yamamura ,  Kosuke Hasegawa ,  Shota Hayashi ,  Takaaki Furuhata

IPC: H01H33/662 ,  H01H1/02 ,  B22F3/26 ,  C22C1/04 ,  C22C5/04 ,  C22C9/00 ,  C22C9/10 ,  C22C14/00 ,  C22C16/00 ,  C22C25/00 ,  C22C27/02 ,  C22C27/04 ,  C22C27/06 ,  C22C30/02 ,  H01H33/664 ,  H01H11/04

Abstract: It is an electrode material that is used as an electrode contact of a vacuum interrupter and that contains one or more parts by weight of a heat-resistant element and one part by weight of Cr, the remainder being Cu and an unavoidable impurity. A part of Cr powder and the heat-resistant element powder are mixed together, and this mixed powder is sintered such that a peak corresponding to Cr element disappears in X-ray diffraction measurement. A solid solution powder obtained by pulverizing a sintered body of the heat-resistant element and Cr obtained by the sintering is mixed with the remaining Cr powder, and this mixed powder is shaped and then sintered. A sintered body obtained by this sintering is infiltrated with Cu.

公开(公告)号：US10262819B2

公开(公告)日：2019-04-16

申请号：US15757108

申请日：2016-08-23

Applicant: MEIDENSHA CORPORATION

Inventor： Kazuhiro Nagatake ,  Kaoru Kitakizaki ,  Keita Ishikawa ,  Shota Hayashi ,  Kosuke Hasegawa

IPC: H01H33/664 ,  H01H33/662 ,  H02B13/035 ,  C22C9/00 ,  C22C27/04 ,  B22F1/00 ,  B22F3/15 ,  B22F9/04 ,  C22C1/04

Abstract: Disclosed is a vacuum circuit breaker (1) including a vacuum interrupter (3) accommodated in a ground tank (2) filled with insulating gas. At least one of a fixed electrode (10) and a movable electrode (11) of the vacuum interrupter (3) uses an electrode material in which particles containing a solid solution of a heat resistant element and Cr are finely and uniformly dispersed and in which Cu textures as a high conductive component are finely and uniformly dispersed. The electrode material contains 20 to 70% by weight of Cu, 1.5 to 64% by weight of Cr and 6 to 76% by weight of the heat resistant element relative to a weight of the electrode material. The particles of the solid solution in the electrode material have an average particle size of 20 μm or smaller.

公开(公告)号：US09959986B2

公开(公告)日：2018-05-01

申请号：US15123012

申请日：2015-02-17

Applicant: MEIDENSHA CORPORATION

Inventor： Kaoru Kitakizaki ,  Keita Ishikawa ,  Shota Hayashi ,  Nobutaka Suzuki ,  Kosuke Hasegawa

IPC: H01H1/025 ,  H01H1/02 ,  C22C27/04 ,  C22C27/06 ,  H01H33/662 ,  H01H33/664 ,  C22C1/04 ,  B22F3/10 ,  B22F3/11 ,  B22F3/26

CPC classification number: H01H1/0203 ,  B22F3/1007 ,  B22F3/11 ,  B22F3/26 ,  B22F7/008 ,  B22F2998/10 ,  C22C1/045 ,  C22C1/0458 ,  C22C27/04 ,  C22C27/06 ,  H01H33/662 ,  H01H33/664 ,  B22F1/0003 ,  B22F3/10 ,  B22F9/04 ,  B22F3/02 ,  B22F3/15

Abstract: A method for producing an electrode material, provided to involve: (i) a provisional sintering step of sintering a mixed powder containing a powder of a heat resistant element and a powder of Cr to obtain a solid solution where the heat resistant element and Cr are dissolved; (ii) a pulverizing step of pulverizing the solid solution to obtain a powder; (iii) a main sintering step of sintering a molded body obtained by molding the powder of the solid solution, to produce a sintered body; and (iv) a Cu infiltration step of infiltrating the sintered body with Cu.

公开(公告)号：US10153098B2

公开(公告)日：2018-12-11

申请号：US15570433

申请日：2016-04-26

Applicant: MEIDENSHA CORPORATION

Inventor： Shota Hayashi ,  Keita Ishikawa ,  Takaaki Furuhata ,  Kenta Yamamura ,  Kosuke Hasegawa

IPC: H01H11/04 ,  H01H1/02 ,  B22F1/00 ,  B22F5/00 ,  B22F9/04 ,  C22C1/04 ,  C22C9/00 ,  C22C27/06 ,  H01H1/025 ,  H01H33/662 ,  H01H33/664

Abstract: It is a method for producing an electrode material containing Cu, Cr and a heat-resistant element. A heat-resistant element powder and a Cr powder are mixed together such that the heat-resistant element is less than the Cr by weight. A resulting mixed powder is baked. A resulting sintered body containing a solid solution of the heat-resistant element and the Cr is pulverized, and a resulting solid solution powder is classified, to have a particle size of 200 μm or less. 10-60 parts by weight of the classified solid solution powder and 90-40 parts by weight of a Cu powder are mixed together, followed by sintering to obtain the electrode material. If a low melting metal powder having a median size of 5-40 μm is mixed with a mixed powder of the solid solution powder and the Cu powder, the deposition resistance property is further improved.

公开(公告)号：US09724759B2

公开(公告)日：2017-08-08

申请号：US15122743

申请日：2015-02-17

Applicant: MEIDENSHA CORPORATION

Inventor： Kaoru Kitakizaki ,  Keita Ishikawa ,  Shota Hayashi ,  Nobutaka Suzuki ,  Kosuke Hasegawa

IPC: H01H33/664 ,  B22F3/16 ,  B22F1/00 ,  B22F3/26 ,  C22C27/04 ,  H01H1/025

CPC classification number: B22F3/16 ,  B22F1/0007 ,  B22F3/26 ,  B22F2301/10 ,  B22F2301/20 ,  B22F2304/10 ,  B22F2998/10 ,  C22C1/045 ,  C22C9/00 ,  C22C27/02 ,  C22C27/04 ,  C22C27/06 ,  C22C30/02 ,  H01H1/025 ,  H01H33/664 ,  B22F1/0003 ,  B22F3/10 ,  B22F9/04 ,  B22F3/02

Abstract: A method for producing an electrode material, involving: (i) a step of preparing a powder of a solid solution of Cr and a heat resistant material selected from the group consisting of Mo, W, Ta, Nb, V and Zr, wherein either a peak corresponding to Cr element or a peak corresponding to the heat resistant element, which are observed by X ray diffraction measurement made on the powder of the solid solution, disappears; (ii) a step of molding the powder of the solid solution to obtain a molded body and then sintering the molded body to produce a sintered body; and (iii) a Cu infiltration step of infiltrating the sintered body with Cu.