Contact member, method for producing the same, and vacuum interrupter

Patent metadata

Field	Value
Publication number	US-10629397-B2
Application number	US-201716078088-A
Country	US
Kind code	B2
Filing date	Jan 20, 2017
Priority date	Mar 29, 2016
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A contact member according to the present invention includes: a contact layer composed of a plate-shaped porous body containing a high-melting-point metal as a main constituent and infiltrated with an infiltrant containing a low-melting-point metal as a main constituent; a contact-layer supporting part composed of the infiltrant; and a contact-part holding conductor composed of the infiltrant, wherein, the porous body is provided with an opening at the center of the contact layer and a portion from the opening to the contact-part holding conductor is continuously and integrally molded with the infiltrant.

First claim

The invention claimed is:

1. A contact member to be used for a vacuum interrupter, comprising:
a contact layer composed of a plate-shaped porous body containing a high-melting-point metal as a main porous body constituent and infiltrated with an infiltrant containing a low-melting-point metal as a main infiltrant constituent;
a contact-layer supporting part in contact with the contact layer and composed of the infiltrant; and
a contact-part holding conductor composed of the infiltrant,
wherein the porous body is provided with an opening at the center of the contact layer and a portion from the opening to both the contact-layer supporting part and the contact-part holding conductor is a continuous body of the infiltrant, and
wherein an average density of the porous body is smaller than a density of the infiltrant.

2. The contact member according to claim 1 ,
wherein the main porous body constituent of the high-melting-point metal composing the porous body is Cr and the low-melting-point metal composing the infiltrant is Cu.

3. A contact member to be used for a vacuum interrupter, comprising:
a contact layer composed of a plate-shaped porous body containing a high-melting-point metal as a main porous body constituent and infiltrated with an infiltrant containing a low-melting-point metal as a main infiltrant constituent;
a contact-layer supporting part in contact with the contact layer and composed of the infiltrant; and
a contact-part holding conductor composed of the infiltrant,
wherein the porous body is provided with an opening at the center of the contact layer and a portion from the opening to both the contact-layer supporting part and the contact-part holding conductor is a continuous body of the infiltrant, and
wherein an average density of the porous body is larger than a density of the infiltrant.

4. The contact member according to claim 3 ,
wherein the main porous body constituent of the high-melting-point metal composing the porous body is WC and the low-melting-point metal composing the infiltrant is Cu.

5. A vacuum interrupter,
wherein the contact member according to claim 1 is joined with a screw to a current-carrying conductor.

6. A vacuum interrupter,
wherein the contact member according to claim 2 is joined with a screw to a current-carrying conductor.

7. A vacuum interrupter,
wherein the contact member according to claim 3 is joined with a screw to a current-carrying conductor.

8. A vacuum interrupter,
wherein the contact member according to claim 4 is joined with a screw to a current-carrying conductor.

Assignees

• Mitsubishi Electric Corp

Inventors

• Chibahara Hiroyuki

Classifications

• B22D19/00 Primary

  Casting in, on, or around objects which form part of the product (B22D23/04 takes precedence; alumino-thermic welding B23K23/00; coating by casting molten material on the substrate C23C6/00) · CPC title

• B22F7/00

  Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting {wherein at least one part is obtained by sintering or compression (application of coating layers by use of metal powders, see C23C)} · CPC title

• B22F7/04

  with one or more layers not made from powder, e.g. made from solid metal · CPC title

• B22F3/26

  Impregnating {(making ferrous alloys by impregnation C22C33/0242)} · CPC title

• H01H33/664 Primary

  Contacts; Arc-extinguishing means, e.g. arcing rings · CPC title