Swimming aid with adjustable buoyancy

Claim 1

A SWIMMING AID FOR USE IN PROVIDING THE DESIRED AMOUNT OF SUPPLEMENTAL BUOYANCY FOR A BEGINNING SWIMMER, SAID AID COMPRISING A FLUID-TIGHT ELONGATED HOLLOW, INFLATABLE AND LONGITUDINALLY CURVED TUBULAR MEMBER HAVING A GENERALLY SEMI-CIRCULAR SIDE OUTLINE AND DEFINING OPPOSITE SIDES THEREOF GENERALLY PARALLELING AND DISPOSED ON OPPOSITE SIDES OF THE MEDIAL PLANE OF SAID CURVED MEMBER, SAID CURVED MEMBER INCLUDING OPPOSITE END EDGES DISPOSED IN PLANES GENERALLY PARALLELING THE CORRESPONDING RADII OF SAID CURVED MEMBER DISPOSED AT OPPOSITE ENDS THEREOF, MEANS FOR ADMITTING AIR INTO SAID TUBULAR MEMBER AND DISCHARGING AIR THEREFROM, STRAP MEANS CARRIED BY THE OPPOSITE ENDS OF SAID TUBULAR MEMBER AND ADAPTED TO SECURE SAID TUBULAR MEMBER TO A SWIMMER''S MID-PORTION WITH SAID MEMBER DISPOSED ACROSS AND EMBRACING THE SMALL OF THE SWIMMER''S BACK, THE REMOTE ENDS OF SAID CURVED MEMBER BEING RADIALLY FLATTENED AND THE INNER AND OUTER EDGE PORTIONS OF EACH END OF SAID CURVED MEMBER BEING SEALINGLY SECURED TOGETHER ALONG A LINE DISPOSED SUBSTANTIALLY PERPENDICULAR TO SAID MEDIAL PLANE WHEREBY THE OPPOSITE ENDS OF THE INNER MARGINAL PERIPHERAL PORTION OF SAID TUBULAR MEMBER WILL TEND TO BE CURVED MORE SHARPLY THEREBY FORMING INNER OPPOSITE END FLATTENED PORTIONS AND OUTER BULBOUS PORTIONS ON THE OPPOSITE ENDS OF SAID TUBULAR MEMBER, SAID FLATTENED INNER END PORTIONS BEING READILY TRANSFORMED INTO CYLINDRICAL PORTIONS CONFORMING EXACTLY WITH THE CONTOUR OF THE ADJACENT PORTIONS OF THE WAIST OF THE SWIMMER ABOUT WHICH SAID AID IS SECURED AND TO INCREASE THE COMFORT OF THE SWIMMER WEARING THE SWIMMING AID WHILE ALSO SIMULTANEOUSLY INCREASING THE TOTAL AREA OF CONTACT BETWEEN THE SWIMMING AID AND THE SKIN OF THE SWIMMER FOR REDUCING THE POSSIBILITY OF THE SWIMMING AID SLIPPING ABOUT THE WAIST OF THE SWIMMER.