Patent ID: 6628338
Filing Date: 2003-09-30
Classification: G08B

Abstract:
An electric motor apparatus comprising a stator body assembly for mounting an electric motor to one of a fixed member and a rotatable body of a rotatable joint, an inner rotor assembly including a central shaft, at least a portion of which is hollow, said shaft being adapted to be mounted to another one of said fixed member and said rotatable body of said rotatable joint, rotating electric coupling means mounted inside said hollow portion of said central shaft, first and second electrical wire means connected to said rotating electric coupling means, electric connector means coupled to said rotating electric coupling means and positioned at opposite ends of said central shaft for propagating at least one of electric power and electric signals carried by said first electrical wire means associated with one of said fixed member and said rotatable body to said second electrical wire means associated with another one of said rotatable body and said fixed member through said rotating electric coupling means without twisting or flexing electrical wires of said first and second electrical wire means while said rotatable body is being directly driven by said motor and is rotating.