A diving flipper (10) for propulsion in water, comprising a shoe part (100) for receiving a foot of a user, and a flipper part (200) having two ribs (210) and a blade (220) fastened to the ribs (210), wherein the ribs (210) are arranged on both sides of a median plane (M) of the diving flipper (10), and each have dorsal and plantar edges (250, 251) in the transverse direction of the ribs (210) and distal and proximal ends (260, 261) in the longitudinal direction of the ribs (210), and fastening devices (300) for fastening the ribs (210) to the shoe part (100),
wherein the dorsal edge (250) of at least one rib (210) is inclined relative to the median plane (M) of the diving flipper (10), so that the dorsal edges (250) have less of a distance to each other than the plantar edges (251) of the ribs (210) to each other, wherein the ribs (210) elastically deform relative to each other at least in sections in the direction of the median plane (M) of the diving flipper (10) in the event of an external application of force to the flipper part (200) in the plantar direction.

A swimming/scuba diving fin having a blade, a shoe open at the rear, an adjustable elastic strap engageable around the heel of the scuba diver, and two buckles at opposite ends of said adjustable elastic strap connected to two opposed side walls of said shoe, where at least one said buckle has a shaped hollow body forming integrally a portion connecting to said side wall, a channel for the axial sliding of the adjustable elastic strap, and a releasable fastening clamp of the adjustable elastic strap, where such an axial sliding channel has a hole for the inlet of the adjustable elastic strap, a hole for the outlet of the adjustable elastic strap and a deflection angle of the adjustable elastic strap positioned between such an inlet hole and such an outlet hole.

A swimming/scuba diving fin having a blade, a shoe open at the rear, an adjustable elastic strap engageable around the heel of the scuba diver, and two buckles at opposite ends of said adjustable elastic strap connected to two opposed side walls of said shoe, where at least one said buckle has a shaped hollow body forming integrally a portion connecting to said side wall, a channel for the axial sliding of the adjustable elastic strap, and a releasable fastening clamp of the adjustable elastic strap, where such an axial sliding channel has a hole for the inlet of the adjustable elastic strap, a hole for the outlet of the adjustable elastic strap and a deflection angle of the adjustable elastic strap positioned between such an inlet hole and such an outlet hole.

Disclosed is a swimming assistance apparatus, which is worn on a user's both feet to provide the user with buoyancy, such that the user can float on water and swim in a good swimming style while repeatedly moving the waist from side to side like a fish, thereby reinforcing the user's waist muscles. Persons who have knee joint arthralgia or backache or persons who have disability in the lower body can use the swimming assistance apparatus for medical purposes, such as pain relief or treatment.

Disclosed is a swimming assistance apparatus, which is worn on a user's both feet to provide the user with buoyancy, such that the user can float on water and swim in a good swimming style while repeatedly moving the waist from side to side like a fish, thereby reinforcing the user's waist muscles. Persons who have knee joint arthralgia or backache or persons who have disability in the lower body can use the swimming assistance apparatus for medical purposes, such as pain relief or treatment.

Underwater propulsion device (10, 110) comprising a propulsion unit (11, 111) and a mounting unit (12, 112). The propulsion unit is mounted to the mounting unit and comprises an electrically driven propeller (15). The mounting unit (12, 112)is arranged to be removably fixed to a diving flipper (1).

Underwater propulsion device (10, 110) comprising a propulsion unit (11, 111) and a mounting unit (12, 112). The propulsion unit is mounted to the mounting unit and comprises an electrically driven propeller (15). The mounting unit (12, 112)is arranged to be removably fixed to a diving flipper (1).

A swim fin or pair of fins, and method of providing omni directional thrust propulsion during a swimmer/users, power cycle relative to range of motion, that may comprise of, elastomeric flexible to rigid and/or composite materials, a leg bracket, accompanied by leg strap, ankle strap, and attaching hardware, a foot pocket comprising a plurality of pressure entrapment orifices, and fixably attached orifice flaps, disposed dorsally about a foot pocket, a fin blade extending outwardly of said foot pocket, comprising a plurality of fin blade orifice, fixably attached orifice flaps disposed about said fin blade. Sockets, with attaching hardware, disposed about the edges of said fin blade, having removably attached articulating socketed and non-socketed jointed members that extend along the medial to lateral edges as well as anteriorly from said fin blade edges, articulating members may include, integral joint sections having separately assembled internal hardwares, along with corresponding removably attached cable/tendon hardware, which is routed from said lower leg bracket, internally through the fin blade body, to the interior of said socket sections, and removably attached to articulating members, outwardly about the swim fin assembly, a swim fin may further include a fixably attached webbing comprising of thin flexible materials, disposed between said articulating members and fin blade edges, for a uniquely improved method of hydrodynamic pressure entrapment, for the advantage of uniquely increased angle of attack propulsion method for a given user in water.

A swim fin or pair of fins, and method of providing omni directional thrust propulsion during a swimmer/users, power cycle relative to range of motion, that may comprise of, elastomeric flexible to rigid and/or composite materials, a leg bracket, accompanied by leg strap, ankle strap, and attaching hardware, a foot pocket comprising a plurality of pressure entrapment orifices, and fixably attached orifice flaps, disposed dorsally about a foot pocket, a fin blade extending outwardly of said foot pocket, comprising a plurality of fin blade orifice, fixably attached orifice flaps disposed about said fin blade. Sockets, with attaching hardware, disposed about the edges of said fin blade, having removably attached articulating socketed and non-socketed jointed members that extend along the medial to lateral edges as well as anteriorly from said fin blade edges, articulating members may include, integral joint sections having separately assembled internal hardwares, along with corresponding removably attached cable/tendon hardware, which is routed from said lower leg bracket, internally through the fin blade body, to the interior of said socket sections, and removably attached to articulating members, outwardly about the swim fin assembly, a swim fin may further include a fixably attached webbing comprising of thin flexible materials, disposed between said articulating members and fin blade edges, for a uniquely improved method of hydrodynamic pressure entrapment, for the advantage of uniquely increased angle of attack propulsion method for a given user in water.

A water or swim shoe for persons needing to wear an orthotic to support a foot for swimming or any other water exercise or recreation. The shoe body is comprised of porous, water resistant material, has multiple holes for water drainage, and a protective rounded rubber toe end. The shoe sole is comprised of rubber or synthetic rubber. The shoe sole has affixed thereto and extending from the heel end an “L” shaped hard plastic orthotic which is strapped to the back of the person's leg for wear.