US Patent 8935992 Animal chew including interchangeable components

An animal chew including a body and an end assembly. The body may include a first rotating mechanical fastener. The end assembly may be removably affixed to the body and may include a nut, an end knob and a resilient member. The nut may include a second rotating mechanical fastener and a first coupling feature. The end knob may include an opening defined in a first end wherein at least a portion of the nut is received, the opening defined by a side wall and an end wall, including a structure in the side wall to retain the nut. The end knob may also include a second coupling feature to engage the first coupling feature of the nut. A resilient member may bias the first and second coupling features in a disengaged configuration.