DE3415135A1 - Swimming apparatus with flaps for propulsion - Google Patents

Abstract

Two pedal carriages guided on guide rollers are arranged in a guide frame and are connected via pulley tackles, by the cords of the latter, to the flap carriages. The pedal carriages are connected to each other at the opposite ends by a connecting cable, deflected by a roller. The flap carriages also have a similar connection, as a result of which the system is friction-actuated. The guide frame is connected to a strap-on saddle by a connecting piece and a receiving piece. Both pressure and tension are exerted on the pedals, a short linear foot stroke being converted by the pulley tackle into a long flap stroke. The flaps, which are attached to the flap carriage in the form of wings, perform a reciprocal movement to the movement of the foot. During forward movement they spread out and exert a thrust, whereas during the backward movement they close and, because of their curvature, form a favourable shape for flow.

Description

Floating device with flaps for propulsion.

The invention relates to a swimming device with flaps for propulsion in the water by foot operation.

In a guide frame there are two pedal trolleys with pedals on guide rollers attached, the above by pulling ropes over a pulley with two flap carriages are connected. The pedal and valve trolleys are each with a rope over pulleys connected below. The pulley creates a small foot stroke in translates a two- to four-fold flap stroke, which means a long and direct thrust causes. The other subclaims show the special features in more detail.

There are swimming facilities and aids in the form of flaps for known the advance. E.g.

Flaps attached to feet and calves to help when stretching the legs to get a bigger boost. However, this is only brief and comes as an impulse the same, which has an inadequate propulsion effect.

Furthermore, foot-powered swimming devices are known in which A propeller is driven via a bevel gear crank, as in the Offenlegungsschrift DT 2415 965 A1 is described.

Certainly the leg muscles are optimally effective here, however the overall efficiency is relatively low. Because of the excessive bending the thigh is causing great resistance. For a cheap boost of the propeller as large a flow as possible is required, with the low one Swimming speed is not reached. High torques occur around the crank axle so that the thrust line of action of the propeller fluctuates constantly. The propeller is practicing also a moment of reaction around the longitudinal axis, which increases the stability of swimmers and device impaired.

The invention has therefore set itself the task of making an easy, by to create a short foot stroke powered swimming device for propulsion in the water, produce a long and effective thrust in the flaps.

This is done with a swimming device characterized by the claims achieved.

In a long lead frame made up of two connected side by side Consists of square tubes, two pedal carts, guided by guide rollers, run towards it and here. You are up by a pull rope, which pulls over four pulleys running, connected to the valve car.

At the bottom are the pedal trolleys by a pulley that is deflected by a pulley Rope connected so that one foot can pull while the other pushes. The flap trolleys are also at the bottom by means of a rope that is attached to the end of a Role is deflected, connected.

The role of the pulley is to move the short and powerful foot stroke in to implement a long and weak flap stroke. On the flap carriage are means a flap carrier two flaps attached like a wing. Spread in the pushing direction they move, creating a large area for thrust in the water. When returning they fold up and their curvature creates a favorable flow shape. They slide back and forth synchronously with the movement of the foot. So the whole rope system runs well on the rollers, it can be stretched over the forks of the roller train. The guide frame is adjustable in length via a connecting piece which is attached to the receiving piece is recorded, connected to a saddle by a saddle joint. The saddle is with fastening straps, which are connected to a hip belt, between the Attached thighs. It mainly serves to guide and stabilize the Swimming device. The gradual length adjustment in the receiving piece enables a Adaptation for different sizes of people. It is still used for a quick separation or connection with the saddle.

Before going swimming, the saddle is first attached to the body. Then the swimmer goes with the device into the water until it is about the saddle joint achieved.

Now the receiving piece is swiveled forward, the connecting piece inserted and locked or clamped. The swimmer lies down on his back or the side, put your feet in the foot holder and start pedaling he is being driven forward.

The swimming device is made of light material and possibly provided with buoyant material in such a way that it is only just on the surface of the water remain.

The floating device can be used for transport by car or bicycle can be dismantled into several main parts. The advantages over the previous known swimming devices are a good stability and propulsive effect. The effective ones Levers on the pedals and flaps are relatively short. The size of the foot stroke determines the swimmer itself as required and is not necessarily the same as with the crank drive. This means that the knee joint is only slightly bent, creating a favorable flow shape of the body is achieved.

Direction control is achieved by moving the upper body at will achieved in cooperation with the hands. The scope is mainly in swimming for locomotion in coastal and open inland waters. For non-swimmers it is not suitable without special safety precautions.

One way of carrying out the invention will now be described with reference explained in more detail on the drawing. It shows Figure 1 a side view with partial section and FIG. 2 shows a plan view with partial section of the swimming device according to FIG. 1.

As shown in Figure 1, are in a guide frame 1, which consists of consists of two square tubes 2 fastened next to one another, two pedal trolleys 9 Guide rollers 16 arranged. At the upper ends of the pedal car 9 and opposite In the forks 18 there are rollers 17, over which a pull rope 12 is deflected several times is. The whole thing is the principle of a pulley with the opposite force effect. the Pull cables 12 are connected to the valve carriage 10, which is also in the square tubes 2 are guided on guide rollers 16. The pedal trolleys 9 are through one of the Pedal roller 13 deflected connecting rope 11 connected to one another. The valve trolleys 10 are also connected by a valve rope 14 deflected by the valve roller 15. So that the entire cable system runs smoothly and safely on the rollers 17, it can with the clamping nuts 19 are tightened over the forks 18.

The guide frame 1 is via a connecting piece 3, the receiving piece 4 and the saddle joint 6 is connected to the saddle 7. In the receiving piece 4 that can Connecting piece 3 can be moved by means of the length adjustment 5. She mainly serves the adjustment to the leg length. On the saddle 7 there are fastening straps at the front and rear 8 attached, which lead to a hip belt, not shown in the drawing. On the flap carriage 10, a flap carrier 21 is attached, which is in a square tube 2 existing flap slot 22 slides. There are two flaps 20 on the flap carrier 21 Attached like a wing and have a curvature.

during the thrust, the flaps 20 are held by expansion ropes 23, whereas they are limited at the stop 22 during the return and a favorable flow shape form.

On the pedal trolley 9, the pedal bracket 25 is attached, which is also slides in a pedal slot, not shown. He takes the pedals 24 with him the foot holder 26.

Both are around the pedal bracket 25 according to the angle of the foot movement movably attached in the ankle joint.

The mode of operation is explained below according to FIG. 1.

If the upper pedal carriage 9 is pressed in the direction of the arrow (full arrow), the associated pulley with four pulleys 17 takes four times the length of the pull rope 12, whereas the one below gives off the same length and the corresponding one Pedal trolley 9 is pulled in the opposite direction. The power of the upper pedal cart 9 is over the upper pull rope 12, the upper flap carriage 10 with the flap closed 20 over the valve rope 14 onto the lower valve carriage 10 with the valve open 20 transferred and pulled against the swimming direction, generating a thrust. The process is reversed when the lower pedal carriage 9 is pressed. (Dashed Arrow).

The ratio of the foot stroke to the flap stroke is determined by the number of Roles 17 determined in the roller train.

By connecting the pedal trolleys 9 by means of the connecting rope 11 the whole system is frictional, which also reduces the tensile force of the respective Foot becomes effective.

As can be seen from FIG. 2, the pedals 2 and the flaps 20 are arranged with the same direction of movement on the same side. This creates a balance achieved by torques. The upright arrangement of the guide frame 1 causes a Stabilization and prevents excessive wagging of the swimming device.

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Claims (8)

Claims Ö Floating device with flaps for propulsion in the water with foot actuation, characterized in that in an elongated guide frame (1) two pedal trolleys (9), which are deflected from the pedal roller (13) by a Connecting rope (11) and above by pulley blocks, over their opposite Rollers (17) deflected pull cables (12), with the flap carriage (10) with flaps (20) are connected, the flap carriage (10) with flaps (20) also having a connection by a valve rope (14) deflected at the end of the valve roller (15). 2. Swimming device according to claim 1, characterized in that by the pulley, the variable foot stroke is translated into multiple flap stroke. 3. Swimming device according to claim 1 or 2, characterized in that the pedals (24) are provided with foot holders (26), thereby pulling one foot can be exercised while the other is pushing. 4. Swimming device according to one of claims 1 to 3, characterized in that that on a flap support (21) which is attached to the flap carriage (10), two flaps (20) are arranged like a wing and have such a curvature that they are in the closed Form a favorable flow shape during the return flow. 5. Swimming device according to one of claims 1 to 4, characterized in that that the pedal carriage (9) and the valve carriage (10) are provided with guide rollers (16) and a linear to-and-fro movement in the guide frame during the swim advance (1) execute. 6. Swimming device according to one of claims 1 to 5, characterized in that that the pull ropes (12) over the forks (18) with rollers (17) through tension nuts (19) can be tensioned. 7. Swimming device according to one of claims 1 to 6, characterized in that that the guide frame (1) by a connecting piece (3) and a receiving piece (4), which has a detachable length adjustment (5), connected to a saddle (7) is. 8. Swimming device according to one of claims 1 to 7, characterized in that that the saddle (7) is connected to the receiving piece (4) by a saddle joint (6) is, which allows a swiveling of the swimming device in the swivel range of the legs.