Integral door knob assembly with spring return

A door knob assembly having a knob member with a spring return, rotatably connected to a rose member for mounting on a face of the door, the knob member including a tubular shank formed of plastic material, the tubular shank having a tubular portion extending from the knob member with a plurality of fingers at the end of the tubular portion positioned about an axis of rotation for the knob member, the fingers formed by a plurality of slots in the tubular portion parallel to the axis, each of the fingers having snap lock engagement means at the end thereof;

• the rose member having an internal bearing portion for supporting the tubular portion of the knob member permitting rotation of the shank therein, and two post members extending internally from the rose member for engagement with a door knob assembly mounted on the other side of the door, the post members spaced equidistant from the axis and in line therewith;
• a cylindrical spring assembly member formed of plastic material and having a concentric bore on one end for engagement with the tubular shank, curved openings formed in a face on the other end of the spring assembly member for receiving the fingers of the tubular shank in snap lock engagement, and attachment means in the face of the spring assembly member for axial attachment to a spindle, the knob member and spring assembly member having means to restrict rotation within the rose member, and
• spring means on the spring assembly member to return the knob member to a first position after partial rotation and release.