Bone milling module with locking mechanism and related systems

A modular system for converting bone stock into bone chips, the system comprising:

• a base module including a motor;
• a milling module comprising:
• a shell adapted for removeable attachment to the base module, the shell defining an inlet opening through which bone stock is introduced into the shell, the shell further comprising:
• a body including a base plate having a top surface, with said base plate defining a control opening and with said body defining a channel extending from said control opening to a lock opening;
• a milling element for converting bone stock into bone chips movably disposed in the shell above said base plate and below said inlet opening;
• a lid adjacent said lock opening and shaped for removeable attachment to the body to allow removal of residual bone chips from the milling element, wherein said lid defines a locking recess;
• and
• a locking element having a control surface and a locking portion, with the control surface at least partially seated in the control opening of the base plate within the channel defined by the body inside the shell, the locking element is movable between:
• an unlocked position wherein the locking element is positioned relative to the lid to allow removal of the lid from the body without requiring removal from the base module including the motor;
• and
• a locked position wherein the locking element is positioned in said locking recess relative to the lid to prevent removal of the lid from the body;
• wherein when the milling module is attached to the base module, the control surface is inaccessible for actuation and the locking element is in the locking position;
• and
• wherein when the milling module is not attached to the base module, the control surface is accessible for actuation from an underside of the base plate opposite the top surface.