Patent ID: 7768175
Filing Date: 2010-08-03
Classification: H01R,Y10T

Abstract:
1. A method of manufacturing a brush which has a central part of a surface of a conductive member that is to make pressure contact with a rotating commutator which is cut away to form contact surface parts, which contact surface parts make sliding contact with said commutator, and a non-contact surface part, which does not make contact with said commutator, the method comprising the steps of: molding the conductive member to have two margins of said surface, which are separated by a distance defined in the direction of the axis of rotation of said commutator, which margins are made into forms that slant away from the commutator in an outward direction along said direction of the axis of rotation, wherein the conductive member is molded such that a top surface of each of the two margins is respectively defined by an arc; and cutting away said central part to form said contact surface parts between said margins and said cut-away central part, wherein said central part is cut away such that said contact surface parts are shaped as curving bands, each respectively aligned in a sliding direction of said commutator.