Abstract: A flotation device comprises a head having a lower, partially annular surface and a rectangular slot located at the front of the head. A body of the device comprises an upper partially annular surface proximate the lower partially annular surface, tapered fingers located at an end of the body opposite the upper partially annular surface, and angled channels on an inner surface of the body. An inner casing connects the rotatable head and the body. A boat line or dock line, such as a rope, can be placed into a central aperture that also serves as a central aperture for the head and the body. A helical ridge located on an outer, circumferential surface of the body can be rotated within the channel of the body until the channel terminates.

Abstract: The present invention relates to an improved expandable intramedullary nail for the fixation of bone fractures. The nail includes an elongate sleeve having one end adapted to be inserted within the medullary cavity of the bone. The one end of the sleeve is formed of a predetermined maximum retracted diameter to permit the insertion of the one end within the bone cavity. A plurality of circumferentially spaced, radially expandable elements are carried by the one end of the sleeve. The elements are radially movable from a first, retracted position wherein the elements define a first diameter to a second, expanded position wherein the elements define a second diameter greater than the predetermined maximum retracted diameter and the first diameter. In accordance with the present invention, when the elements are in the expanded position, the elements provide at least two support points at the second diameter and axially spaced along the sleeve for engagement with the inner wall of the bone cavity.