US Patent 10363798 Insert for a multi-part vehicle door

An insert for a vehicle door that has one part that is separable from another part of the door. The insert may have a body having a first end, a second end, a longitudinal axis extending between the first end and the second end and through the center of mass of the body, an opening at the first end, and an inner surface that defines a cavity extending from the opening toward the second end. The inner surface has a first portion and an opposing second portion wherein the distance from the first portion to the axis decreases from the first end toward the second end of the cavity along at least a portion of the cavity. The distance from the second portion to the axis increases from the first end toward the second end of the cavity along at least a portion of the cavity.