公开(公告)号：US20230118133A1

公开(公告)日：2023-04-20

申请号：US17913491

申请日：2021-03-18

Applicant: MEIDENSHA CORPORATION

Inventor： Hideaki FUKUDA

IPC: H01H33/662 ,  H01H33/664 ,  H01H33/666 ,  H01H33/66

Abstract: An arc shield surrounding an outer peripheral side of a fixed electrode and a movable electrode is provided, in addition to a fixed-side insulating unit in which a fixed-side insulator is provided to be connected coaxially with the arc shield on the fixed side in the axial direction of the arc shield, and a movable-side insulating unit in which movable-side insulators are provided to be connected coaxially with the arc shield on the movable side in the axial direction of the arc shield. The movable-side insulating unit has an insulator group in which movable-side insulators are provided to be connected in the axial direction, an insulator-group-side sub shield surrounding the outer peripheral side of a movable-side energizing shaft, and an insulator-group-side sub shield support part which is on the outer peripheral surface of the insulator-group-side sub shield and interposed between two adjacent movable-side insulators of the insulator group.

公开(公告)号：US20190299285A1

公开(公告)日：2019-10-03

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 ,  H01H33/66 ,  H01H1/025 ,  H01H1/02

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：US20250029800A1

公开(公告)日：2025-01-23

申请号：US18715441

申请日：2022-12-01

Applicant: MEIDENSHA CORPORATION

Inventor： Hideaki FUKUDA ,  Noboru SAKURAI ,  Hiroki NARITA

IPC: H01H33/664 ,  H01H33/662

Abstract: An arc shield with which a tubular body of a vacuum container is provided includes a tubular arc-shield body portion interposed between a fixed-side insulating portion and a movable-side insulating portion; a tubular arc shield fixed-side extension portion extending from the arc-shield body portion on the axially fixed side along the inner peripheral side of the fixed-side insulating portion; and a tubular arc shield movable-side extension portion extending from the arc-shield body portion on the axially movable side along the inner peripheral side of the movable-side insulating portion. Further, at least one of the arc shield fixed-side extension portion and the arc shield movable-side extension portion is shaped such that the portion becomes smaller in diameter in a stepped manner in the direction of extension thereof.