Aquatic activity fin (1) comprising a foot support portion (2) configured for fixing to a person’s foot, and a fin portion (3) extending from the foot support portion substantially along a base plane (P). The fin portion (3) comprises a support frame (4), a plurality of hydrofoil blades (5) mounted pivotally to the support frame (4) via pivot couplings (6), and a mechanism for limiting the maximum blade pivot angle β of each hydrofoil blade. The mechanism for limiting the maximum blade pivot angle comprises bidirectional angle stops (7) configured to allow pivoting of the hydrofoil blade from the a thrust position where a trailing edge (9b) of the hydrofoil blade is above said base plane (P), to a return position where the trailing edge (9b) is below said base plane (P).

Aquatic activity fin (1) comprising a foot support portion (2) configured for fixing to a person’s foot, and a fin portion (3) extending from the foot support portion substantially along a base plane (P). The fin portion (3) comprises a support frame (4), a plurality of hydrofoil blades (5) mounted pivotally to the support frame (4) via pivot couplings (6), and a mechanism for limiting the maximum blade pivot angle β of each hydrofoil blade. The mechanism for limiting the maximum blade pivot angle comprises bidirectional angle stops (7) configured to allow pivoting of the hydrofoil blade from the a thrust position where a trailing edge (9b) of the hydrofoil blade is above said base plane (P), to a return position where the trailing edge (9b) is below said base plane (P).

The invention relates to an aquatic shoe consisting of a shoe body (1), a pair of wings (3) and floats (4, 4′), characterized in that the wings (3) are symmetrical, glued together, and linked to the shoe body (1), below the shoe, so as to constitute a part of the sole (2) of the shoe, and in that the float (4) is integrated below the wings (3), at the sole (2), so that one of its faces covers the sole (2), and in that the wings (3) are fixed by a pivot connection on both sides of the shoe, so that they descend when the foot ascends into the water and rise when the foot goes down into the water so that they return to their original position. The invention also relates to the use of footwear in the fields of recreational water and/or sport and in the paramedical fields. The shoe according to the invention can be used for the rehabilitation of animals.

The present invention relates to a swimming assistance mechanism and, more specifically, to a swimming assistance mechanism that is attached to the arms and increases a propulsion effect by increasing resistance against water via an action like that of the fins of a fish when paddling with the arms for propulsion, so as to assist in enabling easier swimming. The swimming assistance mechanism of the present invention is characterized by comprising: a main body fixed between the palm and the elbow; and a fin foldably installed on the outer surface of the main body.

An aquatic training aid includes a paddle member for wearing by a swimmer, a variable diaphragm disposed within the paddle member, the variable diaphragm including a plurality of fitted blades arranged to form an aperture, and a housing peripherally framing the plurality of fitted blades. The variable diaphragm is adjustable to change the aperture from a first expanded position to a second contracted position, and hydrodynamic characteristics of the aquatic training aid when moved through water are affected by the change of the aperture. Controlling the aperture enables the swimmer to adjust the resistance provided by the aquatic training aid when it is moved through water.

An aquatic training aid includes a paddle member for wearing by a swimmer, a variable diaphragm disposed within the paddle member, the variable diaphragm including a plurality of fitted blades arranged to form an aperture, and a housing peripherally framing the plurality of fitted blades. The variable diaphragm is adjustable to change the aperture from a first expanded position to a second contracted position, and hydrodynamic characteristics of the aquatic training aid when moved through water are affected by the change of the aperture. Controlling the aperture enables the swimmer to adjust the resistance provided by the aquatic training aid when it is moved through water.

An improved structure of a long board of a swim fin does not use a plate in gradually changing thickness, but rather uses a fiberboard in fixed thickness. The fiberboard is provided with at least a first opening and at least a second opening arranged in line from small size to large size. The first opening can be triangular, and the second opening can be n-shaped, so that the mechanical strength of fiber flat plate changes gradually from one end to the other end. The plate effective thickness is changed gradually without time consuming processing technique. As such, the manufacturing time and cost are reduced, and consistent manufacturing quality is maintained.

Aquatic activity fin (1) comprising a foot support portion (2) configured for fixing to a person's foot, and a fin portion (3) extending from the foot support portion substantially along a base plane (P). The fin portion (3) comprises a support frame (4), a plurality of hydrofoil blades (5) mounted pivotally to the support frame (4) via pivot couplings (6), and a mechanism for limiting the maximum blade pivot angle of each hydrofoil blade. The mechanism for limiting the maximum blade pivot angle comprises bidirectional angle stops (7) configured to allow pivoting of the hydrofoil blade from the a thrust position where a trailing edge (9b) of the hydrofoil blade is above said base plane (P), to a return position where the trailing edge (9b) is below said base plane (P).

Aquatic activity fin (1) comprising a foot support portion (2) configured for fixing to a person's foot, and a fin portion (3) extending from the foot support portion substantially along a base plane (P). The fin portion (3) comprises a support frame (4), a plurality of hydrofoil blades (5) mounted pivotally to the support frame (4) via pivot couplings (6), and a mechanism for limiting the maximum blade pivot angle of each hydrofoil blade. The mechanism for limiting the maximum blade pivot angle comprises bidirectional angle stops (7) configured to allow pivoting of the hydrofoil blade from the a thrust position where a trailing edge (9b) of the hydrofoil blade is above said base plane (P), to a return position where the trailing edge (9b) is below said base plane (P).

An aquatic training aid includes a paddle member for wearing by a swimmer, a variable diaphragm disposed within the paddle member, the variable diaphragm including a plurality of fitted blades arranged to form an aperture, and a housing peripherally framing the plurality of fitted blades. The variable diaphragm is adjustable to change the aperture from a first expanded position to a second contracted position, and hydrodynamic characteristics of the aquatic training aid when moved through water are affected by the change of the aperture. Controlling the aperture enables the swimmer to adjust the resistance provided by the aquatic training aid when it is moved through water.