Patent ID: 6836997

Claim:
A fish lure having an adjustable buoyancy chamber comprising fore and aft chamber portions connected to one another by an attaching means, said fore and aft chamber portions being co-axially aligned about a central axis, said fore chamber portion includes a first set of a plurality of buoyancy windows and said aft chamber portion includes a second set of a plurality of buoyancy windows, both sets of buoyancy windows being arrayed along the outer wall of each chamber portion and cooperatively positioned to overlie one another, said sets of buoyancy windows are relatively adjustable to one another to create a plurality of valve-like apertures when the buoyancy windows of each set at least partially overlie one another for controlling the air to water ratio within the buoyancy chamber by the rotation of one chamber portion about the other, a means for locking the fore and aft chamber portions in a desired rotational position to selectively size the valve-like apertures between the chamber portions and set the air to water ratio within the buoyancy chamber, said means for locking is a plurality of cooperatively engaging teeth opposingly positioned along juxtaposed annular segments of the fore and aft chamber portions that, when engaged at a desired position, retain the valve-like apertures between the chamber portions in the selected alignment, said attaching means disposed along the central axis between distal ends of each chamber portion, wherein the relative rotation of the fore and aft chamber portions about the central axis varies the buoyancy of the fish lure by increasing or decreasing the size of the valve-like apertures between the chamber portions.