FR2616076A1 - Swimming apparatus - Google Patents

Abstract

Swimming device for moving in water without great physical exertion. It consists of a front part 1 folding over the rear by means of the hinge 7 and equipped with floats 2, with a porthole 3, and with a belt 4. The rear part is equipped with a parallelogram equipped with pedals 9, 10 whose action drives the shaft 13 which carries the propulsive flipper 14. The device according to the invention is intended particularly for aquatic occupations and games.

Description

NATATORY APPARATUS
The present invention relates to a device allowing i a swimmer to move by saving his strength or, for equal muscular expenditure, to cover a longer distance
Swimming assistance is traditionally provided by flippers fitting the swimmer's feet, but their performance is low due to their low elongation, because it moves in the wake of the legs and feet and, except in very rare cases rare, the conformation of these does not allow a good attack of the water, during the leg kicks.

Finally in case of difficulties, ulules are of no help, (cramps, etc.)
They are of no use to people who cannot swim.

The device according to the invention overcomes these drawbacks. It indeed includes a support, provided with floats, a crankset i rectilinear action, actuating a scull, ensuring the propulsion and the direction, which allows the natural use of the muscles of the legs, an anti-roll drift, a porthole of observation of the seabed consisting of a closed cylinder of two transparent disks, the assembly being waterproof, and is equipped with a safety strap connecting the user to the device.

Figure 1 shows, in plan, the device according to the invention.

Figure 2 is a cross section of Fig 1.

Figure 3 shows the plan view of the scull.

Figure 4 shows the section of the pole 13
Figure 5 shows the scull 14 under stress and the resulting deformation.

Figure 6 shows the section along A - B of Figure 5
The device shown, board 1, FIG. 1, comprises a support composed of a folding front part 1, fitted with floats 2, and 23, an observation window 3, a belt 4, a ring d fastener 5, of handles 6, a hinge 7, joins it to the rear part 8 which supports a pedal with rectilinear action which is a set, making up a parallelogram comprising the pedals 9 and 10, a bar 11 and the lifter 12 which controls the shaft 13 which actuates the scull 14, under the pressure of the feet on the pedals 9 and 10. The rear is supported by the float 15 fixed on the anti-roll fin 16, a series of holes aligned, according to a desired pitch 17 , allows various positioning of the crankset.

The front part folds back by means of the hinge 7
Plate 2 gives in four figures the detail of the palm 14, which is the characteristic part of the scull which are: the elastic veil 18 surrounding the branches 19 and 20 and glued by the glue joints 21 and 22, thus forming a hem . The branches 19 and 20 are shown rigid but they can be articulated on the pole 13, in order to modify their respective angle, to adjust the tension of the veil 18. FIG. 5 represents the elastic deformation of the branches 19, 20 and the hollow of the veil 18, of which section A; B; is shown in Figure 6, which specifies the profile induced by the fact that the arms which oblique to the plane of rotation, the direction of translation and by the elastic deformation of the web 18
The section of the branches, according to AB is elliptical, the sides of the hem which can if desired double the whole of the veil 18, are concave under the pressure of the water, convex for the outer hem -0 which determines good performance by reducing the drag (the shaft section 13, according to section C, d is elliptical).

The palm described above is a preferred embodiment.

It can title replaced by a rigid palm with symmetrical biconvex profile, articulated on the shaft 13 by a hinge, a rubber blade or the like.

The device can title equipped with diving fins.

The apparatus can be equipped with two propellant assemblies beating the water in opposite directions from one another, in order to cancel the movements of roll and yaw.

For this purpose the shafts would each be connected to a toothed sector meshing with the other, each actuating a shaft whose length would be desired, so that the shafts can cross without touching each other, the crankset being able to actuate one or the other gear.

The device can be entered with low buoyancy and equipped either with diving fins or with a front part 1, adjustable in depth or direction
The materials that can be used are those used in the navy as well as the means of construction

Claims (2)

 CLAIMS 1 - Device for moving around in water, characterized in that it comprises a front part 1, equipped with floats 2, 23 with an observation window 3, with a belt 4 fastening on the ring 5 and handles 6. This front part is foldable by means of the hinge 7 on the rear part 8, which is equipped with a parallelogram forming a crankset, consisting of pedals 9 and 10, the extensions of which are articulated on the bar II and the lifter 12 which activates the pole 13 which is integral with it and on which the palm 14 is fixed, the float 15 is fixed on the fin 16, a series of holes 17 at the desired pace, enable the pedal to be positioned. The palm 14 consists of the elastic web 18, the edges of which partially wind around the branches 19 and 20 constituting a hem glued by the glue joints 21 and 22. 2 - Device according to claim 1 characterized in that the pedals 9, 10 move in a straight line 3 - Device according to claim 1 characterized in that the drift 16 opposes the movements of roll and yaw. caused by the action of the palm 14, due to its position above the latter 4 - Device according to claim 1 characterized in that the float 15 provides a desired trim i all