AT518134A1 - Alpine ski with a tail for carving - Google Patents

Abstract

The invention relates to an alpine ski with a device for cornering, wherein the device consists of two narrow, slightly curved in the longitudinal direction lamellae (7), which are arranged on both sides of the ski body (1) at a small distance to this fixed and mirror in the plane of symmetry of the ski, wherein the distance between the two lamellae (7) at its front end is smallest and increases counter to the ski running direction and the said lamellae (7) run diagonally apart towards the bottom of the snow, the rear ends the lamellae lie approximately under the rear end of the ski boot.

Description

Title of the invention

Alpine skiing with a tail for carving

Description Introduction

The invention relates to alpine skis for groomed slopes and open terrain.

State of the art

On groomed slopes dominated today the cut momentum. This so-called "carving swing" is automatically triggered by the edge of the waisted "carving ski". In the further swing curve, the edge cuts a circular groove with a predefined by the waist radius.

The radius can be slightly reduced by greater inclination of the driver in the curve, d, h, by larger Aufkantwinkel.

The groove in the snow has only limited shearing resistance and therefore breaks in the middle of the carving momentum and makes the ski slide sideways like the classic ski in the parallel turn. Ski experts control the radius of the bend through the upright angle (as far as possible), intentional drift (lengthens the curve) or jump tum ("shortens the curve").

The weakness of the "carving swing" with the waisted "carving ski" is its only cumbersome controllable curve radius, the low grip of the edge on real, not board-like snow base and the sudden tearing of a ski through unevenness of the ground with eventual, fatal consequences for the knee ligaments.

In the past, some inventors have sought to solve the problems of ski swing and have proposed various means of influencing the sliding behavior.

US Pat. No. 4,752,082 A (Sevington, 1988) describes an inverted U-shaped support which is attached to the ski surface and whose vertical walls extend to the snow pad on both sides of the ski. These walls are waved in the back section of the ski. Each "wave" works like a separate active plate ("slat" in our diction), i. cuts the snow pad at the driver's reserve. "The subject of the invention should facilitate turning" (col. 1, lines 9-10), "... the skier can make a swing by leaning backwards and turning his feet in the desired direction of travel ..." ( Column 2, lines 61 to 63),

Unlike the slats in our application, the slats here run perpendicular to the tread, are ajar against the ski cheek and are located only at the rear ski section behind the ski binding.

The unwanted sideways slippage of modern waisted skis was to prevent two recent US patent applications.

Anton F. Wilson's "Gliding Skis" US 2004/0084879 Al are extremely waisted skis with a width of between 25 and 44mm at the narrowest point. Another version of the Snow Glider has secondary ski edges that allow for ski turns with variable carving radii on a single pair of skis. "Http://www.freepatentsonline.com/20040084879.pdf

Unlike in our application, these "secondary ski edges" are not placed under the ski binding, but only on the ski scoop and at the back of the ski - where they "... interact with the primary ski edges in the area of the ski binding."

As can be seen from the further description, the "secondary ski edges" should virtually widen the inclined ski at the top and at the rear, thereby defining a second, smaller curve radius. The ski would have radii then two curves.

This is contrary to the principle of our invention: strongly curved lamella in the binding area overrides the primary ski edge in the blade area, i. The ski edge slips on the hard snow surface while the side slats cut deeper and the actual groove "carvt".

The second U.S. patent application, Thomas Frederick Oafer's "Ice Carver Ski" US 2004/0080142 Al, calls the additional edge "outrigger edge", i. Outrigger edge and wants to use it on icy slopes. http: //www.freepatentsonline.com/20040080142.pdf "Outrigger Edge improves the rotability and control of skis and snowboards on ice or in snow. It is attached sideways and slightly above the normal ski edge and touches the snow or ice only with sufficient inclination of the ski with respect to the surface "

Unlike the curved slats in our application, which have a significantly greater curvature than the adjacent ski edge, the "outrigger edges" run parallel to this, that is copy the course of the ski edge. That is also the purpose of this US application - one of the

Ski edge upstream blade or even blade saw with the same radius and the same functionality, just just with deeper incision in icy pad than conventional carving edge ..

Neither the text nor the drawings mention or show the curvature of the cantilever edge in the longitudinal direction.

Even before the introduction of carving skis Manfred Winkler registered in 1984 a "tandem steel edge" under DE 3411000 Al. http://worldwide.espacenet.com/publicationDetails/biblio?DB=worldwide.espac enet.com & II = 0 & ND = 3 & adiacent = true & locale = en EP & FT = D & date = 19850926 & CC = DE & NR = 3411000A1 & KC = A1

The aim of the invention was a better grip of the inclined ski on steep and hard slopes. The second edge preceded the then almost straight ski edge and ran diagonally downwards from the ski cheek almost to the level of the tread. Again, this invention differs from our application in that the second edge is too long, making ski steering impossible by slow rotation of the whole ski about the vertical axis and the associated skew of the second edge or louver. The rotational resistance of the cut long edge is just too big.

Unlike the short side sipe in our application, the "tandem steel edge" is not explicitly bent lengthwise.

Our earlier patents describe alpine skis with flat, non-curved blades, then called "fins for directional control", such as AT 503 250 from 2006, AT 506 544 from 2008 and AT 512 396 "Alpine skis with side fins for cut turns".

All of these inventions use a rearwardly ascending aft superstructure as a support of the plate-like fins. The ascending tail allows the driver to drive in the driver's reserve, taking the load off the front ski and effortlessly turning into the bend.

In 2014, we filed a patent for the first ski with curved blades / fins. A 782/2014 "Alpinski with curved tail fins for the direction control" has a clearly rising stern as a carrier of the new, curved lamellae.

Object of the invention

The invention has as its object to replace the contemporary, waisted ski. The curve control through the long, curved "carving" edge should take over a small tail under the shoe heel. Solution of the problem is achieved by the features of the characterizing part of claim 1 to 3.

The invention has achieved the object by a short, curved blade, which is the conventional ski edge left and right upstream. By the edge of the ski before and when driving through a curve, the lower edge of each lamella is pressed into the snow base, then cuts a circular groove and leads the ski in the curve.

The slats of the two ski sides are reflected in the symmetry plane of the ski. Their upper edges are attached to a ski structure, the so-called carving plate, which, however, must be concave cut for the purpose of this invention. Two opposing curved blades and the carving plate form a unit, the "tail for the carving". This is positioned on the surface of a conventional ski so that the back ends of the slats are approximately below the rear end of the ski boot.

A lamella is no more than a tenth of the traditional "carving" edge, but is more radically curved than this, with a radius of 1 meter.

At its front end, the lamella is rounded off to damp hard impacts by stones and sharp bumps in the snow surface. After that, the lower lamellar edge runs almost parallel to the adjacent ski edge and reaches its lowest point here. This is in the plane of the ski tread or up to 3mm higher. Later, the cutting edge rises gradually (straight or slightly curved) and reaches at its rear end the height of 4 to 20mm above the level of the ski tread.

The side walls of the lamella are not perpendicular to the plane of the ski tread, but significantly obliquely at an angle between 75 ° and 40 ° to this. The opposite slats thus run down to the snow ground apart. The resulting distance between the lower lamellar edge and the adjacent ski edge in the front view is 6mm at the front and rises to the rear end of the lamella to 17mm.

The cutting edge thus runs in its front section practically parallel to the ski axis. The whole tail, consisting of the carving plate and the two lamellas, is thus behind by 2 to 3cm wider than the front. For the extreme freeriding we also tested the tail, where the curved lamella is 25mm at the front and 50mm at the rear from the adjacent ski edge. In extreme cases, the two slats can even diverge forward. This means that the tail is wider at the front than in the middle of the slat length. Such a thing would be unnecessary and dangerous for a normal ski run.

As a solution to the problem, a ski with short, thin lamellae was created, which was mounted on both sides of the ski in its binding area and whose lower edges run at a distance of 1 to 2 cm to the adjacent ski edge.

The lamellae are tilted 15 to 50 ° to the vertical, i. mounted to the plane of symmetry of the ski, projecting in the direction down from this.

Effects of the Invention and Subclaims

With this invention, a ski was created with laterally positioned, curved lamellae, which cut a circular groove in the snow under the curve of the normal inclination of the skier in the curve ..., regardless of the respective waist radius of the ski edge.

After countless test drives, we know that this invention can drive clean carving turns with variable radii, even though these curves are driven on a single curved louver. The explanation of this phenomenon is impossible without costly measurement of the trajectory and the contributing forces. As a first approximation, we can assume that the curved cutting edge simply cuts a wider groove if the actual radius traveled does not coincide with the geometric radius of curvature of the blade.

The driver determines the current cornering radius by turning the ski into the curve with greater or lesser torque. Such "override" of the geometric radius is simply physically impossible with conventional carving skis with their min. 1.5m long edges.

Unteranspruch 2 defines an optimal for most applications variant of this

FrfinrliinCT · Hip naa ™ pi «p« vmmptri <! Plip Ännrftniinir rl # »r T in the Rp7iia on the longitudinal axis of the ski and the inclination of the slats with respect to the tread. The latter feature counteracts the typical carving momentum on a typical slope and ensures sufficient grip even for higher cornering speeds on hard or muddy snow surfaces.

Unteranspruch 3 is based on a single pair of slats per ski and limits its position to the area left and right of the boot heel. These central louvres transmit centrifugal forces and the weight of the rider directly to the snow surface without disturbing torques.

The new tail, consisting of two opposing lamellae and their connection by means of a carved cut-out plate can be placed on any conventional ski. With advantage even on non-waisted skis from the pre-carving era. The tail solves the century problem of the ski swing in a totally unexpected way.

Concentrating the entire controller on a small area under the skier's heel reduces the risk of injury to the human knee, especially in today's carving era.

Aufzählung and short description of the drawing figures

In the drawings, the subject invention is shown, for example.

FIGS. 1 and 1 b show a ski according to the invention according to claims 1 to 3, i. in the version with a straight beam and a pair of side, curved blades just below the heel of the ski boot.

The Fig.lc, ld and le show cross sections through the ski according to the invention according to Fig.l and lb in the binding area. Each cross section shows the ski body, the "carving plate" above and the oblique side slats. Figures lf and lg illustrate the operation of the subject invention in the course of the carving sweep on the ski slope. The strieh point line symbolizes the snow surface in cross section. In the hard or icy surface of Fig. 1f, the fins can cut only a shallow groove, while the ski edge has no snow contact. Without the slats, the ski edge on the icy slope could not hold and the ski would probably have to drift, i. slip sideways. Figure lg shows the situation on a normal, medium-hard ski slope. In addition to a slightly pressed-in ski edge, the thin slat, almost perpendicular to the slope, cuts a deep groove.

figure description

According to the exemplary embodiment illustrated in FIGS. 1 and 1b, a structure 3 is mounted on a conventional ski 1 in its binding region, which will serve as a support for the lateral curved lamellae 7.

His cheeks 5 are circular (radius ca lm) cut out, symmetrical to the ski axis and except the bevelled (15 to 50 degrees from the vertical). The secants of the two cut-out segments run towards each other in the direction of travel of the ski, i. the structure is narrower at the front. Here are the tangents of the two cheeks practically parallel to each other. The carrier is finally mounted on the ski top 8, such as a so-called "carving plate".

The slats themselves are cut in accordance with the figure lb of aluminum plate with a thickness of 3mm. The lower edge 9 of the blade 7 may not be below the level of the ski tread 6. In the front part it runs arcuate, reaches its lowest point after one tenth of the length and then rises straight up to its rear end, where it is about 5% of the edge length above the level of the ski tread 6. The two finished slats are now bent like the cheeks of the wearer circular. The curvature is correct when the upper edge 12 of the lamella 7 has the radius of about lm.

Along this upper edge 12 6 holes are now drilled at regular intervals and the two slats 7 then fixed by means of 6 screws to the cheeks 5. In plan view, the two lamellae give a concave structure.

The carrier 3 and the two mirror-inverted curved lamellae 7 together form the actual tail. It is best made from a mold, material is anodized aluminum.

On the support 3 itself then the rear binding jaws 2 is mounted.

In such a way that the rear end of the ski boot is located approximately above the rear end of the curved blades 7. Depending on the size of the shoe, the front binding jaw 4 is then mounted on the front end of the carrier 3.

Claims (3)

claims 1. alpine ski having a device for influencing the sliding behavior of the ski, characterized in that the device comprises a arranged on the top (8) of the ski body and with respect to this non-adjustable support (3) with 2 concave arch-like cut side cheeks (5), having obliquely down to the bottom of the snow, in these depressible, undeformable and unimaginable lamellae (7) which fit tightly against the arcuately-shaped side cheeks and are bent in the longitudinal direction of the ski, with a much smaller radius of curvature than the ski edge (10) itself, wherein the slats above the plane of the sliding surface of the ski (6) are arranged fixed and can be brought by the edge of the ski when driving through a curve in the operative position. 2. alpine ski according to claim 1, characterized in that the lamellae (7) of both side cheeks (5) reflect in the plane of symmetry of the ski and each side line of the lamella, which defines as a section line of the lamella with any, perpendicular to the ski axis standing plane is, are arranged to the plane of symmetry of the ski at an acute angle, the opposing fins diverge down to the snow ground. 3. alpine ski according to claim 2, characterized in that the ski (1) exactly one pair of opposing lamellae (7), wherein the lamellae lie wholly or partly below the heel of the ski boot, which on the upper side of the carrier (3 ) is fixed by means of a commercial binding (2,4) (Fig. 1,1b).