Bone Material Dispenser with Pivotable Tube for Controlled Delivery

The patent introduces a loading chamber as an intermediary component between the bone material source and the dispensing mechanism. The loading chamber receives bone material in a controlled manner and transfers it to the dispensing chamber, preventing direct crude packing that causes spillage. This intermediary structure allows for controlled loading while maintaining simplicity of operation.

The dispensing device is segmented into distinct functional chambers: a loading chamber for receiving bone material, a dispensing chamber for holding the material to be dispensed, and a barrier wall separating them. This segmentation prevents contamination by isolating the sterile dispensing area from the non-sterile loading area, while the overall device structure remains relatively simple.

The dispensing mechanism employs periodic action through a plunger that advances in discrete strokes. Each stroke dispenses a controlled increment of bone material through a dispensing needle. This periodic dispensing allows for controlled amounts of material delivery while maintaining relatively fast overall dispensing speed, as the plunger can be actuated multiple times in succession.

The patent replaces crude mechanical packing and dispensing mechanisms with a more refined system involving a loading chamber that allows controlled material transfer, a plunger-based dispensing mechanism, and a narrow dispensing needle. This substitution of the mechanical system eliminates clogging issues by providing smooth transitions and controlled material flow, while the device structure remains practical for surgical use.