Powder and paste for improving the conductivity of electrical connections

• US 9,748,014 B2
• Filed: 10/02/2013
• Issued: 08/29/2017
• Est. Priority Date: 10/03/2012
• Status: Active Grant

• Current Assignee: A.M.C. Tãªxtil Ltda. (AMC Exportação E Importação S/A), AMC Holding
• Original Assignee: A.M.C. Tãªxtil Ltda. (AMC Exportação E Importação S/A)
• Inventors: Pillet, Michel
• Primary Examiner(s): Diggs, Tanisha
• Application Number:
  US14/433,568
• Publication Number:
  US 20150262723A1
• Time in Patent Office: 1,427 Days
• Field of Search: None
• CPC Class Codes: B22F 2009/046 by cutting
• CPC Class Codes: B22F 9/04 starting from solid material, e.g. by crushing, grinding or milling C22C1/1084 takes precedence; crushing, grinding or milling, in general, see the relevant subclasses, e.g. B02C
• CPC Class Codes: H01B 1/02 mainly consisting of metals or alloys
• CPC Class Codes: H01B 1/16 the conductive material comprising metals or alloys
• CPC Class Codes: H01B 13/00 Apparatus or processes specially adapted for manufacturing conductors or cables
• CPC Class Codes: H01R 13/03 characterised by the material, e.g. plating, or coating materials
• CPC Class Codes: H01R 4/20 using a crimping sleeve H01R4/01 takes precedence
• CPC Class Codes: H01R 4/304 having means for improving contact
• CPC Class Codes: Y10T 428/12181 Composite powder [e.g., coated, etc.]

Abstract

An electrical connection powder comprising particles obtained by pulverizing a skeleton of open cell metal foam chosen from the group consisting of iron, cobalt, nickel and the alloys of same covered with at least one coating of tin or indium or one of the alloys of same. The paste is formed from this powder dispersed in a binder such as grease. The powder or paste is particularity useful for improving the conductivity of an electrical connection consisting of a terminal (20) linked to a cable (24) consisting of a plurality of strands (30, 32, 34) by means of a crimping ring (26).

Claims

1. An electrical connection powder material comprising particles of cellular foam with open cells and having a diameter between 1 and 2 mm, with said foam comprising a foam metal skeleton selected from the group consisting of iron, cobalt, nickel and alloys thereof coated with at least one coating of tin, indium or an alloy thereof, and a binder comprising anti-oxidation products and metal particles.

2. A powder material according to claim 1, wherein said foam metal skeleton comprises a nickel foam skeleton.

3. A powder material according to claim 2, wherein said nickel foam skeleton is covered with a coating of tin.

4. A powder material according to claim 1, wherein said binder contains fat.

5. A powder material according to claim 1, wherein said metal particles are selected from the group consisting of particles of silver, gold or another metal which is a conductor of electricity.

6. A powder material according to claim 1, wherein a diameter of said open cells is from 1.6 to 2.0 mm.

7. A method for producing a powder material according to claim 1, comprising the steps of developing a foam metal skeleton with open cells and then of cutting same into particles having a size ranging from 1 to 2 mm using a means which preserves the open cells of the foam.

8. A method according to claim 7, wherein said means for cutting the foam is a laser device.