EP0683094A1 - Water ski - Google Patents

Abstract

Both floating bodies (10,10') of the water ski are retained at a predetermined distance from each other. They lie parallel to each other and are longitudinally movable in relation to each other using a set of parallel guides. At least one reaction flap (17,17') has a hinge running at right angles to the longitudinal axis of the body. It can swivel between a rearwards not-in-use position and a propulsion position at 90 deg. to it. <IMAGE>

Description

The invention relates to a water ski with two elongated floating bodies each having a footprint for a foot of a user and recoil means arranged on the latter and producing only little flow resistance in the direction of travel.

Water skis of this type with pockets arranged on the underside and open on the back as recoil are already known. In these previously known water skis, the pockets mentioned are bag-like with pointed ends and consist of elastic material.

When such water skis are used as intended, the floats are always used in pairs and used in the manner of conventional skis, i.e. a user carries a float on each foot. The forward movement takes place in that the user, like in cross-country skiing, alternately pushes the two floating bodies forward by walking movements and, if necessary, supports these movements by using sticks with push-off bodies at the lower end of the stick.

When the water skis slide forward, the bag-like pockets should rest on the underside of the assigned floating body, during a floating body movement The previously known water skis only insufficiently meet their intended purpose. In particular, the lateral guidance of the floating bodies has proven to be inadequate and the collapsible bag-like pockets are susceptible to wear. These bags only partially fulfill their function as check valves.

The invention is therefore intended to create an improved water ski with regard to its intended usability.

This object is achieved in that in the water ski according to the preamble of protection claim 1, the two floating bodies are held in parallel at a predetermined distance from one another and are longitudinally movable relative to one another by means of a parallel guide, and in that at least one recoil flap with a pivot axis running transversely to the longitudinal axis of the floating body is provided on each floating body is pivotally articulated between a non-use position placed rearward on the floating body and an operating position, in contrast, which is extended by approximately 90 degrees.

The invention therefore relates to the fact that the two floating bodies are connected to one another, but are otherwise guided in a longitudinally movable manner, so that, analogously to the technique used in cross-country skiing, the two floating bodies can be pushed forward alternately by striding movements, one floating body each by at least one recoil flap on Sliding back against the direction of travel is prevented.

The recoil flaps are expediently in the region of a flap edge lying in the front in the direction of travel articulated between their non-use and operating positions. Recoil flaps articulated in this way, which should consist of dimensionally stable material, are in the positions applied to the respective float when a float slides forward, so that no or at most only insignificant sliding resistance is generated by such a flap, but pivot into its position relative to the non-use position Operating positions extended by approximately 90 degrees if the floating body slides back slightly during the forward movement of the other floating body.

In a sensible embodiment, a guide rail extends along the mutually facing sides of the two floating bodies and on each guide rail, top and bottom track rollers arranged on the other floating body act as longitudinal guide means. The floating bodies guided in a longitudinally movable manner are thus coupled in lateral and vertical respects. The guide rails and longitudinal guide means attached to the floating bodies form the parallel guide, the guide rails being accommodated in a longitudinally movable manner between the track rollers guided on them.

In another development, the guide rails have a longitudinal bead protruding on the top and / or underside, on which the track rollers are guided, and the track rollers are provided with wheel flanges which delimit their running surfaces on both sides and surround the longitudinal beads of the guide rails. This ensures precise lateral guidance of the track rollers on the longitudinal beads of the guide rails.

As such, the guide rails of the two floating bodies and, accordingly, also the track rollers mounted on the other floating body could be arranged offset in height. It has proven to be particularly advantageous, however, if the guide rails on the two floating bodies are mirror images of the same, and are therefore also arranged at the same height in relation to the vertical extent of the floating bodies.

Although the track rollers engaging on the guide rails on the top and bottom sides can also be offset in the direction of the longitudinal extent of the floating bodies, it has also proven to be advantageous if the track rollers engaging on the guide rails top and bottom are arranged in pairs and each floating body has at least two in Floating body longitudinal direction spaced track roller pairs is equipped.

A further embodiment provides that the mutually paired track rollers are each mounted on bearing brackets and the latter are fastened to the one floating body with a support leg that overlaps the track rollers on the top and the track rollers under the other floating body, with a bearing leg protruding from each of these support legs extends between the two floating bodies in each case adjacent to the guide rail arranged on the other floating body, on which the track rollers cooperating with the adjacent guide rail are rotatably mounted. The bearing brackets can be of identical design to one another and can be arranged on the floating bodies in the same way as a mirror image.

The recoil flaps can in principle be arranged at any point along the length of the float. However, the articulation on the rear side of the standing surfaces has proven to be particularly expedient. An improved recoil effect can be achieved if each floating body is provided with a bottom flap and a recoil flap arranged on the side facing away from the other floating body.

Another important embodiment of the invention provides that each float has at least one longitudinally guided recoil flap and that the recoil flap of one float is operatively connected to the other float in such a way that when a float is moved relative to the other float, the recoil flap of a feed movement executing float one towards its bow, whereas the recoil flap of the other float experiences a drive movement towards its stern.

In this embodiment, the recoil flaps assigned to the two floating bodies each perform opposite relative movements to the floating bodies when the one and the other floating bodies are mutually advanced in such a way that the recoil flap of the floating body which is in a feed movement with respect to the other floating body in its underside folded onto the floating body Non-use position moves up to the bow of the floating body in question, while the recoil flap of the other floating body moves to the stern of this floating body in its unfolded operating position. As a result, it does not experience a feed movement Floating bodies are also propelled in the direction of travel. It can be seen that high driving speeds can be achieved with a water ski designed in this way.

A particularly simple drive connection between a floating body and the recoil flap, which is guided longitudinally on the other floating body, is obtained according to a development of the configuration discussed last, such that each floating body articulates at least one longitudinally guided slide, to which at least one return flap is pivoted between a non-use position and a folded-down operating position is, and each has on the side pointing to the other float a belt drive with an endless traction roller, each of which is rotatably mounted on the bow and bow side of the float in question, the lower strand with the slide of this float and the upper strand with the other Float is firmly connected.

The belt drives can be toothed belt drives, but also simple belt or cord drives.

Fig. 1

eine erste Ausführungsform eines aus einem linken und einem rechten Schwimmkörper bestehenden Paars Wasserski in einer Draufsicht,

Fig. 2

den linken Schwimmkörper in einer der Schnittlinie II-II in Fig. 1 entsprechenden seitlichen Ansicht,

Fig. 3

einen Querschnitt gemäß der Schnittlinie III-III in Fig. 1 durch die beiden gegeneinander längsbeweglich geführten Schwimmkörper,

Fig. 4

in einem Ausschnitt gemäß IV in Fig. 3 eine - vergrößerte - Ansicht der die beiden Schwimmkörper gegeneinander längsbeweglich verbindenden Führungsmittel,

Fig. 5

eine zweite Ausführungsform eines aus einem rechten und einem linken Schwimmkörper bestehenden Paars Wasserski in einer Seitenansicht,

Fig. 6

die Wasserski in einer Draufsicht zu Fig. 5,

Fig. 7

eine gegenüber den Fig. 5 und 6 vergrößerte Heckansicht der zweiten Ausführungsform,

Fig. 8

in einer vergrößerten Ausschnittansicht gemäß VIII in Fig. 5 eine in einer bugseitigen Position stehende, unterseitig an den Schwimmkörper in eine Nichtgebrauchsstellung angeklappte Rückstoßklappe,

Fig. 9

in einer vergrößerten Ausschnittansicht gemäß IX in Fig. 5 eine in einer heckseitigen Position stehende Rückstoßklappe in ihrer abgeklappten Betriebsstellung,

Fig. 10

mit Blick gemäß Pfeil $\overline{\underline{\text{X}}}$

in Fig. 5 eine ausschnittsweise Detailansicht der Anordnung und Führung der Rückstoßklappen und

Fig. 11

einen gegenüber den Fig. 5 und 6 stark vergrößerten Querschnitt gemäß der Schnittlinie XI-XI in Fig. 6 durch die beiden Schwimmkörper.

Two embodiments of the water ski according to the invention will be explained below with reference to the accompanying drawing. Schematic views show:

Fig. 1

a first embodiment of a pair of water skis consisting of a left and a right floating body in a plan view,

Fig. 2

the left floating body in a side view corresponding to the section line II-II in Fig. 1,

Fig. 3

2 shows a cross section along the section line III-III in FIG. 1 through the two floating bodies which are guided in a longitudinally movable manner with respect to one another,

Fig. 4

in a section according to IV in FIG. 3 an enlarged view of the guide means connecting the two floating bodies in a longitudinally movable manner,

Fig. 5

a second embodiment of a pair of water skis consisting of a right and a left floating body in a side view,

Fig. 6

the water ski in a plan view of Fig. 5,

Fig. 7

5 and 6 enlarged rear view of the second embodiment,

Fig. 8

5 is an enlarged cut-out view according to VIII in FIG. 5 of a recoil flap which is in a bow-side position and on the underside of the floating body is folded into a non-use position,

Fig. 9

5 is an enlarged cutout view according to IX in FIG. 5 of a recoil flap standing in a rear position in its folded operating position,

Fig. 10

with a view according to the arrow $\overline{\underline{\text{X}}}$

in Fig. 5 is a partial detail view of the arrangement and management of the recoil flaps and

Fig. 11

a greatly enlarged cross section compared to FIGS. 5 and 6 according to the section line XI-XI in Fig. 6 by the two floating bodies.

1 and 2 in their entirety, it is a mirror image, but otherwise elongated floating bodies 10, 10 ', which are of identical design to one another, which are arranged next to one another and connected to one another by means of a parallel guide to be explained below and guided against one another in a longitudinally movable manner are. These floating bodies each end in a rounded bow 12, 12 'which is slightly raised relative to the underside 11, 11'.

At the top, each floating body 10, 10 'is equipped approximately in the middle of its longitudinal extension with a standing surface 14, 14' rising above its upper side 13, 13 'for one foot each of a user, and each standing surface is provided with a binding 15, 15' which is only indicated. Mistake. In the rear part of the floating bodies, recoil flaps 17, 17 'and 18, 18' are articulated on their outer sides 16, 16 'facing away from one another and on the lower sides 11, 11', specifically with their edges lying in the direction of travel around pivot axes extending transversely to the longitudinal direction of the floating body 19, 19 'and 20, 20'.

When the floating bodies 10, 10 'slide forward, the recoil flaps lie in receiving pockets 21, 21' and 22, 22 'arranged on the undersides and outer sides of the floating bodies 10, 10', so that practically no interference the outer skin of the floating body occurs. As a result, the recoil flaps in their positions folded against the floating bodies practically cause no increase in flow resistance when the floating bodies slide forward.

However, if, when the water ski is used as intended, the other float undergoes a slight backward movement when one float is pushed forward, the recoil flaps 17, 17 'and 18, 18' pivot by almost 90 degrees into the fold-out positions illustrated in the drawing, in which they oppose the direction of travel cause an extreme increase in flow resistance and thus ensure that the float in question does not experience any further backward movement in addition to the slight backward movement when swinging out its recoil flaps.

Finally, the floats 10, 10 'at the rear are also equipped with two spaced-apart rudders 23, 24 and 23', 24 ', respectively, which can be pivoted about approximately vertically extending pivot axes in the manner indicated by the double arrows in FIG. 1. These rudders can be actuated, for example, by means of bindings 15, 15 'which are rotatably arranged in the area of the standing surfaces 14, 14', from which control cables extend to the rudders, which is not shown, but is known in principle.

As already explained above, the two floating bodies are guided in a longitudinally movable manner with respect to one another by means of a parallel guide, and are coupled to one another with regard to their lateral spacing and also in vertical terms. This parallel guide comprises one on each floating body 10, 10 'facing each other Pages 27, 27 'longitudinal guide rail 28, 28', which is equipped at its end distant from the respective floating body with a guide bead 29, 30 or 29 ', 30' protruding from the top and bottom. Furthermore, the parallel guide comprises two track roller pairs 32, 33 and 32 ', 33', spaced apart from one another in the longitudinal direction of the float, the track rollers 34, 35 and 34 ', 35' of which engage the respective guide rail 28, 28 'on the top and bottom sides and are guided on the longitudinal beads 29, 30 and 29 ', 30' projecting upwards and downwards. The track rollers are equipped with wheel flanges 37, 38 projecting radially on both sides over their running surfaces 36, which grip around the longitudinal beads of the guide rails on both sides and thereby impart precise lateral guidance.

The respective track rollers, which are combined to form pairs of track rollers 32, 32 'and 33, 33', are accommodated in bearing brackets 40, 40 ', which have a support leg 41, 41' for attachment to a floating body 10, 10 'and a bearing leg 42 projecting at right angles therefrom. 42 'have, on which the track rollers 34, 35 and 34', 35 'are rotatably mounted with axes of rotation extending approximately parallel to the support leg.

As shown in FIG. 4 in particular, the bearing brackets 40, 40 ', which are spaced apart from one another in the longitudinal direction of the floating bodies on the two floating bodies 10, 10', are of identical design to one another, but are attached to the floating bodies in a mirror image in the same way with their supporting legs. Accordingly, the support legs 41 of the bearing brackets 40 fastened to the one floating body 10 overlap the track roller pairs on the upper side and into the space between the two Floating bodies project from each of these supporting legs, a bearing leg 42 which runs adjacent to the guide rail 28 'of the other floating body 10'. Similarly, the support legs 41 'of the bearing brackets 40' attached to the other floating body 10 'engage underneath the track roller pairs on the underside and the bearing legs 42' protruding from these supporting legs extend adjacent to the guide rail 28 of the other floating body 10.

FIG. 4 shows that the bearing legs 42, 42 'of the brackets 40, 40' arranged on the two floating bodies encompass one another when the floating bodies are in the position shown in FIG. 1 with respect to one another. Each on the side pointing to the adjacent guide rail 28, 28 'are mounted on the bearing legs 42, 42' on the upper and lower side on the guide rail 28, 28 'of the respective other floating body track rollers 34, 35 and 34', 35 '. In the embodiment shown, the ends of the bearing legs that are removed from the respective support leg are U-shaped and the track rollers 34, 35, which are arranged at a distance from the respective support leg, are accommodated between the support leg and the section bent parallel to it.

In a similar manner, extensions of the support legs 41, 41 'are formed into a parallel position spaced apart from the respective bearing leg, and the track leg-side track rollers 34, 35' are mounted between these support leg sections and the respective bearing leg.

It can be seen that by means of the parallel guide shown in particular in FIG. 4, the two floating bodies 10, 10 'without interfering with one another Longitudinal mobility is held and guided both in terms of their lateral distance, in height and moreover also against jamming.

The embodiment illustrated in FIGS. 5 to 7 is also a mirror image, otherwise the floating bodies 50, 50 ', which are of identical design to one another, are arranged next to one another and connected to one another by means of a parallel guide 51 and are longitudinally movable relative to one another. These floats 50, 50 'also each run out in a rounded bow 53, 53' which is slightly raised relative to the underside 52, 52 'of the float and approximately in the middle of their longitudinal extent are the floats 50, 50' on the upper side in FIGS 7 stand areas not shown each equipped for a foot of a user.

While in the first embodiment the floating bodies 10, 10 'are each provided with pivot axes fixed to the floating body downward and to the flip-out recoil flaps facing away from the other floating body, in the embodiment according to FIGS. 5 to 7 each floating body 50, 50' has only a recoil valve 55, 55 '. The recoil flaps 55, 55 ', the width of which corresponds approximately to the underside width of the floating bodies 50, 50', are each pivotable about horizontally extending articulation axes 56, 56 'between an extended operating position and a non-use position folded down on the underside of the relevant floating body 50, 50' articulated to a carriage 58, 58 '. These slides 58, 58 'are accommodated in a longitudinally movable manner in a longitudinal guide 59, 59' which extends along the underside of the respective floating body 50, 50 ' and firmly connected to a traction means 61, 61 'of a belt drive 60, 60'. The two belt drives 60, 60 'are accommodated under the parallel guide 51 which connects the two floating bodies 50, 50' to one another in the space between the floating bodies and are each guided via a deflection wheel 62, 62 'which is rotatably mounted on the stern and one on the bow side of the floating body in question.

The lower run section 63, 63 'of the traction means 61, 61' of the belt drive 60, 60 'associated with the float in question is fixedly connected to the carriages 58, 58', which are guided in a longitudinally movable manner on the floats 50, 50 ', while the upper run layer is connected to each the other float. In this respect, the lower flange 63, 63 'of the traction means 61, 61' is clamped between the top of the associated slide 58, 58 'and a clamping tab 65, 65' screwed to it. The upper straps 64, 64 'of the traction means 61, 61', on the other hand, are between a bracket 66, 66 'projecting laterally from the other floating body approximately in the middle of its length under the parallel guide 51 and a clamping tab 67, 67' screwed to the respective bracket. clamped and thereby firmly connected to the other floating body. As shown in FIG. 11, the top chords 64, 64 'of the two traction means 61, 61' are offset in height and the brackets are also spaced apart from one another in such a way that the two brackets 66, 66 'overlap one another.

If, when the water ski is used as intended, the two floating bodies 50, 50 'are alternately advanced in the manner customary for cross-country skiing the slide 58, 58 'of the floating body carrying out a feed movement undergoes a forward movement in the direction of the bow 53, 53' of the floating body, the recoil flap 55, 55 'articulated on the slide being folded up on the underside of the floating body and accordingly in its non-use position located.

This drive movement of the carriage 58, 58 'is conveyed by the belt drive 60, 60' assigned to this floating body, the traction means 61, 61 'of which is firmly connected on the upper belt side to the other floating body, as a result of which the upper belt 64, 64' relative to the belt drive 60, 60 ' floating float 50, 50 'to the rear and, accordingly, the lower flange 63, 63' connected to the slide executes a movement towards the bow 53, 53 '. Analogously to this, the slide 58, 58 ', which is guided longitudinally on the other floating body, is moved to the rear of this floating body with the recoil flap 55, 55' pivoted into its unfolded operating position, by the upper belt 64, 64 'of the traction means 61, 61' connected to the first-mentioned floating body the belt drive 60, 60 'assigned to the other floating body is moved in the feed direction during the advancing movement of the first-mentioned floating body and accordingly the lower belt 63, 63' which is firmly connected to the recoil flap 55, 55 'and undergoes a rearward drive movement.

Claims (10)

Water skiing with two elongated floating bodies each having a footprint for a foot of a user and recoil means arranged thereon and producing only little flow resistance in the direction of travel,
characterized,
that the two floating bodies (10, 10 ') are held in a parallel position at a predetermined distance from one another and are longitudinally movable relative to one another by means of a parallel guide, and that at least one recoil flap (17, 18, 17', 18 ') is attached to each floating body (10, 10') ) is pivotably articulated with a pivot axis (19, 20, 19 ', 20') extending transversely to the longitudinal axis of the floating body between a non-use position placed to the rear of the floating body and an operating position which, in contrast, is approximately 90 degrees. Water ski according to claim 1, characterized in that on the mutually facing sides (27, 27 ') of the two floating bodies (10, 10') each a guide rail (28, 28 ') extends and that each guide rail is arranged on the other floating body Engage the track rollers (32, 33, 32 ', 33') as a longitudinal guide on the top and bottom. Water ski according to claim 2, characterized in that the guide rails (28, 28 ') have a longitudinal bead (29, 30, 29', 30 ') projecting on the top and / or underside, on which the track rollers (34, 35, 34' , 35 ') and that the track rollers are provided with their treads delimiting on both sides and the longitudinal beads of the guide rails encompassing wheel flanges (37, 38). Water ski according to claim 2 or 3, characterized in that the track rollers (34, 35, 34 ', 35') engage in pairs on the upper and lower sides of the guide rails (28, 28 ') and in that each floating body (10, 10' ) at least two track roller pairs (32, 33, 32 ', 33') spaced apart in the longitudinal direction of the float are arranged. Water ski according to Claim 4, characterized in that the track rollers (34, 35, 34 ', 35') assigned to one another in pairs are each mounted on bearing brackets (40, 40 ') and the latter on the one floating body (10) with one overlapping the track rollers on the top and on the other floating body (10 '), the support rollers (41, 41') engaging underneath the track rollers and that from each of these supporting legs a bearing leg (42, 42 ') protrudes, which is located between the two floating bodies, each adjacent to that on the other floating body Guide rail (28, 28 ') extends and on which the track rollers cooperating with the adjacent guide rail are rotatably mounted. Water ski according to claim 5, characterized in that the are attached to both floating bodies (10, 10 ') Bearing brackets (40, 40 ') are identical to one another and are arranged identically in mirror image. Water ski according to one of claims 1 to 6, characterized in that the recoil flaps (17, 18, 17 ', 18') are articulated on the floats (10, 10 ') at the rear from the standing surfaces (14, 14'). Water ski according to one of claims 1 to 7, characterized in that each floating body (10. 10 ') is provided with a bottom flap and a recoil flap (17, 18, 17', 18 ') arranged on the side facing away from the other floating body. Water ski according to one of claims 1 to 6, characterized in that each floating body has at least one recoil flap which is guided in a longitudinally movable manner and that the recoil flap of one floating body is operatively connected to the other floating body in such a way that the recoil flap in each case when a floating body is pushed forward relative to the other floating body of the floating body carrying out a feed movement one towards its bow, whereas the recoil flap of the other floating body experiences a drive movement directed towards its rear. Water ski according to claim 9, characterized in that each floating body has at least one slide which is guided in a longitudinally movable manner and on which at least one recoil flap which is pivotable between a non-use position and a folded-down operating position is articulated, and in each case on the side pointing towards the other floating body, a belt drive with one tail each - And rotatable on the bow side of the float in question mounted deflection roller guided endless traction means, the lower strand is firmly connected to the slide of this float and the upper strand with the other floating body.

Images