US Patent 8491423 Training aid for a batter

A training aid for a batter, which can include a barrel, a handle, and a connection assembly, wherein the connection assembly can be configured to allow the barrel to pivot to form an angle of one hundred eighty degrees between the barrel and the handle when a batter uses proper swing mechanics. The connection assembly can be configured to allow the barrel to pivot to form an angle different than one hundred eighty degrees between the barrel and the handle when a batter swings with improper swing mechanics, such as a “flying lead elbow”, “casting”, a “wrap swing”, a “hitch”, or “barring out”.