Patent ID: 9543803
Date: 2017-01-10
CPC Classifications: F04D,H02K

Claim:
1. A heating circulation pump comprising: an electric motor; a pump housing; a motor housing connected to the pump housing; a pump impeller arranged in the pump housing and driven by the electric motor arranged in the motor housing; and a terminal box formed of plastic and fastened on the motor housing, wherein the terminal box receives electrical and/or electronic components of a motor control as well as an electrical connection of the motor, with an earthing contact arranged on the motor housing and with a plug or socket of an electric plug-in connection for the electrical connection, said plug or socket being arranged at an outside on the terminal box, wherein the earthing contact arranged on the motor housing is connected in an electrically conductive manner to an earthing contact of the plug or of the socket as well as to at least one lead in an inside of the terminal box, the electrical connection for the earthing contact arranged on the motor housing and the earthing contact of the plug or of the socket is arranged outside the terminal box, and wherein the earthing contact of the plug or of the socket is branched into two contact legs, of which one leg engages into the motor housing, and the other leg is arranged on an outer side of the motor housing at a distance thereto, said motor housing comprising a first projection and a second projection, said first projection and said second projection defining a leg receiving space, at least a portion of said one leg being arranged in said leg receiving space, said at least said portion of said one leg engaging said first projection and said second projection, said at least said portion of said one leg being located at a spaced location from an interior of said terminal box.