Short motion swim fin
OwnerE Roger Masseinventor
Life of this patent
Estimating the term…
Abstract
A short motion swim fin used as training device for the improvement of the fast flutter kick motions of speed swimming and as such uses a flat flexible plate which is rigid across its base, and inner rubber sheath surrounding the plate and an outer sheath which varies in length depending upon the rigidity desired by thereby varying a projecting portion of the plate which contact the water. The plate functions as a lever on the underside of the foot to stretch the arch of the foot on every downward kick, as well as to strengthen the fast twitch leg muscles associated with a strong flutter kick.
Claims11
A swim fin for attachment to a swimmer's foot for the improvement of the fast flutter kick motions of speed swimming comprising:
- a thin flexible plate having an upper end portion a lower end portion and an intermediate portion and a first rigid rib mounted along the plate at the upper end and a second rigid rib being mounted to the plate at the intermediate portion thereof parallel to the first rib;
- a first flexible sleeve having a forward and rear portion an upper portion and a lower portion each having outer edges joined together to form an envelope for insertion of the flexible plate, said plate engaging and stretching the sleeve edges in a taught relationship to provide an edge to scull water and wherein the envelope provides a cushion between the plate and the foot;
- a second flexible sleeve having an aperture extending therethrough, said first flexible sleeve being removably mounted within said second sleeve with the forward portion of the first sleeve extending outwardly from the second sleeve;
- and,
- means mounted to the flat plate to engage and maintain a swimmer's foot within the sleeves with the arch of said foot positioned over the lower end portion of the plate.
A swim fin for attachment to a swimmer's foot for the improvement of the fast flutter kick motions of speed swimming comprising:
- a flexible flat plate having a substantial rectangular configuration, having an upper and lower end portion, an intermediate portion and a lower end portion, a first rigid rib mounted across one end portion and a second raised rib being mounted across the intermediate portion;
- a circular rubber inside sleeve having open sides and a width formed by said sides which is less than the width of the plate, said sleeve enclosing the plate as a double surfaced closure, having one end taut between the length thereof and the other end forming a double flap with a diagonal shaped end that is tucked under the second rib;
- a second circular outside rubber sleeve of the same width as the inside sleeve but having a shorter length, said sleeve being mounted over the inside sleeve and plate located therein such that the outside sleeve holds the foot firmly in place on top of the inside sleeve;
- and,
- mounting means securing the plate to the foot.
A swim fin for attachment to a swimmer's loot for the improvement of the fast flutter kick motions of speed swimming comprising:
- a thin flexible plate having an upper end portion a lower end portion and an intermediate portion and a first rigid rib mounted along the plate at the upper end and a second rigid rib being mounted to the plate at the intermediate portion thereof parallel to the first rib;
- a flexible sleeve having an aperture extending therethrough, said flexible sleeve being removably mounted about the plate with a swimmer's foot being secured between the plate and the sleeve;
- and,
- means mounted to the flat plate to engage and maintain a swimmer's foot within the sleeve with the arch of said foot positioned over the lower end portion of the plate.
Dependencies are inferred from the claim text.