Radio-frequency interference suppressing choke with elongated portions for brush-type motors

DETAILED DESCRIPTION An object of the present invention is to fulfill the needs referred to above.
In accordance with the principles of the present invention, this objective is obtained by providing a choke for suppressing radio-frequency interference of a brush-type motor.
The choke includes a single wire having a portion wound about a coil axis to define a plurality of coils including two outermost coils.
An attaching structure extends from each outermost coil and is disposed generally transverse with respect to the coil axis.
Each attaching structure is constructed and arranged to be inserted through an associated opening in a supporting structure and to be bent so as secure the choke to the supporting structure.
An elongated end portion extends from each attaching structure so as to be spaced from and generally parallel to the coil axis.
The elongated end portions extend in opposite directions.
One of the elongated end portions is constructed and arranged to be directly electrically connected to an electrical connector of a motor and the other of the elongated end portions is constructed and arranged to be in electrical connection with a brush of the motor.
In accordance with another aspect of the invention, a brush card assembly for a d.
c.
motor includes at least one choke having a portion wound about a coil axis to define a plurality of coils including two outermost coils, an attaching structure extending from each outermost coil and being generally transverse with respect to the coil axis.
An elongated end portion extends from each attaching structure so as to be spaced from and generally parallel to the coil axis, the elongated end portions extending in opposite directions.
The assembly further includes a brush card having first and second opposing sides and a pair of openings through the opposing sides.
Each attaching structure is disposed through an associated opening and bent so as to be adjacent to the second side, with the wound portion of the choke being disposed on the first side of the brush card, such that the choke is secured to the brush card