the detailed description set forth below is intended as a description of the presently preferred embodiment of the invention , and is not intended to represent the only form in which the present invention may be constructed or utilized . the description sets forth the functions and sequences of steps for constructing and operating the invention . it is to be understood , however , that the same or equivalent functions and sequences may be accomplished by different embodiments and that they are also intended to be encompassed within the scope of the invention . as shown in fig1 , an ankle float buoy 10 is attached to the ankle region of a swimmer 15 . this configuration allows the swimmer 15 to isolate and train their arms , shoulders , and core region by focusing on the arm stroke . the buoy 10 may formed of a buoyant , resilient material and is configured to be easily attachable to the ankle region 25 of the swimmer 15 . by locating the buoy 10 on the ankles 25 , the buoyant force provided by the buoy 10 is at a distalmost portion to maintain the swimmer &# 39 ; s body in proper form , while also maintaining a secure attachment to the swimmer 15 . as can be seen , the ankle region 25 defines a narrow point of the swimmer &# 39 ; s leg . as such , while the buoy 10 is easily attachable and removable from the swimmer &# 39 ; s body , it remains securely attached during swimming without the need for cumbersome straps or other securing means . further , the design and configuration of the buoy 10 can be simplified to maintain its position at the ankle , in comparison to other configurations where the device would be attached to a user &# 39 ; s calf area . generally , the calf is wider at the upper portion and narrows to the lower portion as you approach the ankle . as such , in devices attached to a swimmer &# 39 ; s calf , the geometry of the openings have to be tapered in such a fashion to match the user &# 39 ; s calf , resulting in more complicated and / or expensive fabrication demands along with the possibility of shifting or unintended detachment from the swimmer during use . as can be seen in fig2 , the buoy 10 is attached to the ankles 25 of the swimmer 15 such that the buoy 10 has a front edge 12 facing in the direction of the swimmer &# 39 ; s movement through the water and a trailing rear edge 14 . as best seen in fig3 and 4 , the buoy 10 includes a pair of ankle openings for receiving the ankles 25 of the swimmer 15 . the ankle openings are defined by various openings and walls to receive and maintain the ankles . in particular , the ankle openings include a rear opening 16 that , in use , is located at the bottom of the ankle 25 near the swimmer &# 39 ; s foot and a front opening 18 disposed on the opposite side of the buoy 10 that , in use , is located at the top of the ankle 25 near the swimmer &# 39 ; s calf . further , the ankle openings have a side opening 20 that allows for the easy entry and exit of the swimmer &# 39 ; s ankles 25 from the buoy 10 . as such , it can be seen that the ankle openings are open on three of its six sides . the three non - open sides are defined by a top wall 22 , a lower wall 24 , and an inside sidewall 28 . as can be seen , the top 22 , lower 24 , and sidewalls 28 form a substantially c - shape configuration for maintaining the ankles 25 in place during use . the top wall 22 is connected to the lower wall 24 by a central portion 26 , wherein the central portion has the sidewalls 28 on each respective side . as shown in fig3 and 5 , the top wall 22 and lower wall 24 both extend bilaterally outward in a horizontal direction from the central portion 26 . the distal ends 30 a of the top wall 22 curve in a downward fashion to help secure the ankle 25 in place , while the distal ends 30 b of the lower wall 24 curve in an upward fashion . as such the distal ends 30 a , 30 b , while not connected , approach each other to form a substantially c - shape configuration . the front edge 12 is defined by the top wall 22 , lower wall 24 , and central portion 26 on the side of the buoy 10 having front openings 18 and the rear edge 14 is defined by the top wall 22 , lower wall 24 , and central portion 26 on the side of the buoy 10 having the rear openings 16 . in certain embodiments , the rear edge 14 may be contoured to better accommodate the swimmer &# 39 ; s lateral malleolus ( the outer protrusion of the ankle ). in particular , the rear edge 14 may take a convex configuration such that the central portion 26 extends further than the distal ends 30 a , 30 b along the rear edge 14 . by tapering inward at the distal ends 30 a , 30 b , the buoy 10 may avoid encompassing the swimmer &# 39 ; s lateral malleolus during use , thereby providing a more comfortable design than if the buoy 10 were provided in a substantially straight configuration that encompassed the user &# 39 ; s lateral malleolus during use . the buoy 10 is preferably formed from a buoyant and resilient material in order to provide floatation assistance to the swimmer while maintaining its shape during use , but being readily deformable to allow for easy entry and exit of the swimmer &# 39 ; s ankle 25 . for example , the buoy may be formed from a foam polymer such as polyethylene or ethylene - vinyl acetate ( eva ) fig6 shows the entry of the ankle 25 into the ankle openings of the buoy 10 . as can be seen in this figure , the distal ends 30 a , 30 b may be deformed away from their typical closed position into an open configuration to allow for the entry of the ankle 25 . whereupon when the ankle 25 is in position in the ankle opening of the buoy 10 , the resilient material returns to its normal closed position thereby securing the buoy 10 in proper position during use ( as seen in fig5 ). as shown in phantom in fig2 , the ankle openings may be formed in a substantially straight cylindrical shape . this embodiment may be formed , for example , by cutting the ankle openings out of a block of foam . this configuration , while easy to form does not perfectly follow the anatomy of the ankle and allows for some play between the buoy 10 and the ankles 25 , while still maintaining the buoy 10 in position during use . in an alternative embodiment , shown in fig7 - 10 , the ankle openings may be formed in a convex configuration . that is , the portion of the ankle opening at the rear 16 and front opening 18 is wider than the portion between the two openings . this configuration allows for the buoy 10 to better grip the swimmer &# 39 ; s ankles 25 . this configuration may formed by compression molding a piece of foam to form the convex shape of the ankle openings . as such , it can be seen from the unique configuration disclosed herein , the buoy may be easily placed upon the user and removed from the user without a need for complicated and cumbersome straps or other attaching devices . further , the configuration allows for easy and economy in the manufacturing process in that complex geometries and shapes are not necessary to maintain the position of the buoy on the user &# 39 ; s ankles . additionally , the placement of the buoy on the swimmer &# 39 ; s ankle region , as opposed to the calf or thigh region , places the source of buoyancy at a distalmost portion of the leg region , thereby providing buoyancy in a location that is able to maintain the swimmer in proper alignment within the water . in addition to the use of a buoyant material in forming the buoy , it is envisioned that the buoy may further be configured in such a fashion to act as a hydrofoil . that is , the outer shape of the buoy may be optimized such that the lift generated by propulsion through the water while in use is substantially larger than the drag generated by the buoy . by shaping the buoy in such a manner , it further acts in a manner to maintain the swimmer &# 39 ; s body in proper alignment during use . the above description is given by way of example , and not limitation . given the above disclosure , one skilled in the art could devise variations that are within the scope and spirit of the invention disclosed herein , including various ways of forming the ankle float buoy and various sizes of the ankle float buoy for swimmers of different ages and sizes . further , the various features of the embodiments disclosed herein can be used alone , or in varying combinations with each other and are not intended to be limited to the specific combination described herein . thus , the scope of the claims is not to be limited by the illustrated embodiments .
a unitary ankle float buoy for immobilizing the legs during swim training . the buoy is formed of a central portion connecting a top wall and a lower wall and a pair of ankle openings disposed on each side of the central portion . the ankle float buoy is designed and configured to be worn upon both ankles of a swimmer below the calf and above the foot .