Patent ID: 9666383
Date: 2017-05-30
CPC Classifications: H01H

Claim:
1. An electric contact device that is part of an electric switching device able to allow or interrupt the passage of the electric current, comprising at least one moving support and a contact pad mounted on the moving support, the moving support being able to move to position the contact pad in contact with a fixed contact surface connected to an electrical conductor, the contact pad comprising a contact surface designed to cooperate with said fixed contact surface, wherein said contact surface of the contact pad comprises a first spherical portion, comprising an actual zone of contact with said fixed contact surface in a position allowing the passage of current, and, in continuation of the first spherical portion, a second convex portion with a variable shape going from spherical to cylindrical, wherein the first spherical portion extends over half of the contact surface, between a first inner edge of the moving support and a central line substantially parallel to said first edge, and the second portion extends over another half of the contact surface, a surface of said second portion being variable from spherical to cylindrical between said central line and a second outer edge of the moving support.