AT512396A4 - Alpine skis with side fins for cut turns - Google Patents

Abstract

Current alpine skiers are controlled by the use of ski edges. This invention equips the ski with short fins in the binding area and on the ascending ski stern. During the carving swing, they cut the snow surface more firmly than normal ski edges, thereby relieving the ski edges and taking over the entire control of the curve. Like the vehicle steering wheel with both hands, both skis are dosed in the desired direction. The skier steers with his footwork. The fins set obliquely to the current direction of travel trigger a reaction of the snow reason, which determines the course of the curve. In hard snow or ice, the ski cuts two grooves, with the side fin below the binding and the tail fin on the same side. When gliding on a tread, the Finns do not interfere with the carving momentum they overdrive the predefined curve radius of the waisted ski edge and prevent unwanted lateral drifting.

Description

Title of the invention

Alpine skis with side fins for cut turns

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 curvature by means of external angle (as far as possible), intentional drifting (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 snow pad and the sudden tearing of a ski due to unevenness of the ground.

In the past, some inventors have sought to solve the problems of ski-swing of the then-non-waisted skis and have proposed various means of influencing the sliding behavior. US Pat. No. 3,871,671 or Re. 29,659 (Bildner, 1962) "Radial ski having a profiled running surface" proposes a multi-layer construction of the ski body »consisting of thin horizontal layers of different widths, resulting in a ski edge which is also composed. In addition, he introduces a slightly concave sliding surface. The first aspect of this invention is the symmetry of the longitudinal and horizontal axis of the ski at each side.

Unlike our application, these are not freestanding plates or fins. http: // www. ff eepatentsonline. com / RE29659. US Pat. No. 3,063,728 (Patterson, 1962) discloses a device for influencing the sliding behavior of the ski, which is located in the foot area of the ski.

In agreement with this invention Ϊ provide along or both of the longitudinal edges of a ski, or a portion thereof, a series of discontinuities such as longitudinally spaced teeth or projections which terminate substantially at the level of the running surface of the ski (or slightly above that surface) when the ski is canted at an angle to the direction of travel.

The aim of this invention is to better hold on ice sheets that occur very often in the eastern US.

On the smooth, unbroken ski edge various metal plates should be placed in said area, with perforated, serrated or otherwise profiled edges. These will cut like a saw in the icy pad and give the ski better grip.

Unlike in this application, the proposed metal plates have no distance to the ski body. They are tightly pressed against the ski cheek or the ski underside and bolted to it. http://www.freepatentsonline.com/3G63728. pdf

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 plate of action ("fin" in our diction), that is, cuts the snow pad at the driver's reserve. " to make tuming ... easier " (Col. 1, lines 9-10), " the skier can make a tum by leaning backwards and tumbling the feet ... in the intended new direction .... " (Col. 2, lines 61-63), bottom face: inverted channel member a horizontal base portion slightly greater in width than the width of the ski and extended from the intermedi-ate section to a point beyond the tail end of the ski , said channel member having a pair of side walls, one side of which is said to be side by side arranged in parallel to the side edges of the said ski sections; each of said

Unlike the Finns in our registration, the Finns run perpendicular to the tread, are closely ajar against the ski cheek and are located only at the rear ski section behind the ski binding.

The prior art also includes the ski according to the patent FR 1 340 031 A (Barkhausen, 1963): the use of vertical plates in the longitudinal direction, their size and shape, the intended function of the directional control.

Different is the fixed arrangement of a plate below the ski tip, the rotatability of the second plate and the large distance between the two plates. In firmer snowpacks, this ski will cling like a touring ski with attached harsh iron or like a blunt saw blade in hard wood, and is therefore absolutely useless on today's groomed slopes.

The ski rides only in loose snow, which was not a big disadvantage in its time of origin.

The location of the fins in our application allows their metered impressions in hard pad, controlled by the weight shift to the rear. Unintentionally strong cutting slows the ski and causes the driver to tilt forward. Through the fixed ski boot transmits this torque on the ski and lifts the fin out of the jam.

The ski described in FR 2 706 780 A1 (Pasquet, 1994) shows a remote relationship with this application, although other objectives have been stated here: not the directional control, but the stabilization of the sliding by a second tread, the return brake by the side of the Second tread wearers attached Harsch irons and a speed control through rudimentary fin-like spikes. For the

Activation of these functions is a preparatory fixation of the angle between the two treads by means of a suitable pad and a compression of the ends of the two treads by heavy load on the pivot point. In this way, the longer upper tread snow contact and resiliently supports the skier to the rear, while the attached to the support of the upper tread metal parts extend into the snow and brake as needed. These must not have too much lateral resistance in order not to influence the classic directional control over the edge. For the return brake when walking, the loosening of the front suspension of the carrier is necessary.

The introduction of vertical rear fins for short skis in 2006 as a second control element (after the ski edges) according to our Austrian patent AT 503 250 brought light swing release even in difficult open terrain, freely selectable turning radius and better grip in the curve. However, the skier must actually burden the tail fins with appropriate reserves if he wants to take advantage of them, i. E. he must not drive in stiff "carving" attitude, but to change dynamically between reserves and reserves.

By 2008 was further developed, the Finns moved closer to the heel and introduced a new fin in the ski axis, thereby increasing the contact pressure on the tail fins and improved the smoothness. The result was patented under AT 506 544 and published as European Patent Application EP 09450065.

Object of the invention

The invention is based on the most common ski for groomed slopes, the "carving ski" and set itself the task of improving its driving characteristics significantly.

The goal was a ski that can drive very fast corners on the edge, where conventional carving skis slide sideways.

This ski should not only be able to ride bows with the radius determined by its waist size. The skier and not the geometry of the ski waist should determine the course of the curve.

Unlike our earlier invention ("Alpinski with Heckfinnen"), the subject of this application should also work without reserve of the driver. Solution of the problem is achieved by the features of the characterizing part of claim 1 to 5.

The invention has achieved the object by the use of a short fin on the swing inside of the conventional ski edge. This fin (or several consecutive ones) is automatically activated by the driver's inclination in the curve or by deliberate edge-up.

The fin is placed so that it penetrates deeper into the snow during the entire swing curve than the edge itself. In addition, it lies directly under the heel of the skier and can transfer the forces very efficiently to the snow surface.

When swinging, therefore, the narrow fin cuts a deeper groove in the snow base, which can withstand greater centrifugal force than the groove created by the ski edge itself.

The fin extends from the top to the level of the ski tread. She must not go deeper to avoid the gliding of the ski on full tread.

Upper edge of the fin is attached to a ski construction, the so-called carving plate. Lower edge of the fin is slightly rounded and runs approximately parallel to the adjacent ski edge at a distance of ibis 2 cm. Because of these geometric conditions, the fin must therefore not be perpendicular to the tread, but obliquely, downwardly projecting at an angle of 75 ° to 45 ° to the tread.

However, this slope is advantageous for the cutting of the fin in the snow under the typical carving momentum. The ski is placed on the edge at an angle of 15 ° to 45 °. The fin then cuts the backing approximately perpendicular, which brings the most optimal shearing resistance.

Active, i. A cut-in fin relieves the ski edge in the curve and takes over its control function. Unlike the carving edge, the fin is short and not curved. It controls solely and solely by their slight inclination in relation to the current direction of travel.

The snow pad, especially the wall of the groove responds to it with appropriate pressure at an angle to the direction of travel.

This inclination is created by the "footwork" of the skier.

Thus, the skier steers his ride directly by slightly turning both skis in the desired direction, as a driver drives his vehicle.

Unlike long ski edges, the short fins (max.10% of the edge length) can be easily rotated without prior ski relief.

At this point a comparison with our patent "Alpinski with Heckfinnen" is appropriate. In this older invention, the Finns are behind the ski boot and are activated only by the driver's reserve. The fins from this application are next to the ski boot and are automatically activated by the driver's lateral incline in the turn. In both cases, the fins are above the level of the ski tread. The tail fins have to produce a certain braking effect in order to prevent the driver from accidentally tilting backwards. Therefore, they are keel-shaped and generally thicker.

When driving on full tread the side fins from this application are ineffective. The lateral Finns act in the carving momentum, the tail fins on the other hand in the Schussfahrt.

The lateral fins are arranged in mirror image with respect to the only plane of symmetry of the ski. With their upper edges they are attached to a ski structure, the so-called "carving plate" and run at a small distance to the ski cheek down to the snow bottom. If a plate (fin) of the ski cheek is preceded, with the aim of cutting deeper groove in the snow surface, then it should probably be perpendicular to this. And not to the ski bottom. That was the reason for the slanted assembly of the Finns.

As a solution to the task, a ski with short thin fins was created, which was attached to 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 fins are inclined at an angle of 15-45 ° 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 fins, which grab by the usual slope of the skier in the curve in the snow and in this way make direct control of the curves possible, regardless of the respective waist radius and the current inclination of the skier ,

Unteranspruch 2 defines an optimal for most applications variant of this invention: the paired, symmetrical arrangement of the fins with respect to the longitudinal axis of the ski and the inclination of the fins 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 limits the position of the main pair of fins of dependent claim 2 on the area left and right of the ski boot. These central fins transmit centrifugal forces and the driver's gravitational force directly to the snow surface without disturbing torques. However, additional pairs of fins can further favor cornering in special cases. This possibility comes into play in subsequent subclaims.

Unteranspruch 4 can bend the unspecified defined by claim 1 under the rear jaw of the bond and its rear portion extend upward. At its side cheeks at least one pair of fins is attached in this section, which engages in the snow with some lateral inclination of the driver and with the curved carving edge on the ski scoop and possibly, other side fins cooperates and u.a. a very tight groove in the snow pad intersects.

Subclaim 5 positioned on the ascending, specified in subclaim 4 carrier an additional fin in the plane of symmetry of the ski. On the soft snow surface this cuts a second groove with sufficient inclination of the skier and thereby increases the grip in the curve with respect to the fins, as recited in the subclaims 3 and 4. Two grooves can withstand greater centrifugal forces than just one.

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 variant with a straight beam and a pair of side fins immediately under 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 fins. FIGS. 1f and 1g illustrate the mode of operation of the subject invention in the course of the carving turn on the ski slope. The dash-dot 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 Finns, 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 depressed ski edge, the thin fin, which is almost perpendicular to the slope, cuts a deep groove.

The drawings of Figures 2 and 2b illustrate a ski according to the invention of claim 4, i. in the variant with a bent support, a pair of lateral fins, which are attached to the side cheeks of the ascending portion of the carrier and finally also the central fin in the plane of symmetry according to claim 5.

FIGS. 2c, 2d, 2e, 2f and 2g show cross sections through the ski according to the invention according to FIGS. 2 and 2b from the ski tip to the rear ski end, wherein FIGS. 2c, 2d and 2e together represent the positioning of a ski 2F and 2G show a second pair of lateral fins and the central fin.

figure description

According to the embodiment illustrated in FIGS. 1 and 1b, on a conventional short ski 1, e.g. The so-called "Fun Carver" mounted in its binding area a structure 3, which will serve as a carrier for the lateral fins.

It could be a so-called "carving plate", at least 40 cm long. Your cheeks 5 must now be chamfered so that they can serve as a support surface for the fins 7.

The fins themselves are cut out of aluminum plate with a thickness of 3 mm as shown in Fig. 1b. They are attached to the carving plate 3 by means of approx. 6 screws. The lower edge of the fins 7 must not be below the level of the ski tread 6.

In the second embodiment of Figures 2 and 2b, a conventional alpine ski is shortened to the length of about 1 m, i. cut off at the rear end, creating a new ski end 11 is created.

On its upper side 8, a support is attached, which is, however, bent approximately below the rear binding jaws 2 and then runs upwards.

On the side cheeks 5 of the carrier 3, a pair of side fins 7 is mounted in front of the rear binding jaws, symmetrically to the ski axis, as in the first exemplary embodiment.

Also on the rising portion 9 of the carrier, a pair of Seitenfmnen 10 is mounted, symmetrical to the ski axis, as in the first exemplary embodiment. Finally, a single fin of anodized aluminum is attached to the underside of the rear portion 9 of the beam in its longitudinal axis.

The carrier 3 with integrated fins 10 and 12 is best made from a mold, material is anodized aluminum. The mold is uniquely determined by Figures 2, 2b, 2f and 2g.

The middle fin 12 in the ski axis is the foremost and lowest located fin. Its tip is about 2mm above the plane of the sliding surface.

All three Finns form narrow, pyramidal pyramidal top formations in the form of dragon quadrangle (deltoid).

The rear end of the carrier 3 was dovetail-cut to achieve better tracking in steep and soft snow.

On the ski 1 an exemplary safety binding 2,4 is mounted.

Claims (5)

1. alpine skiing with a device for influencing the sliding behavior of the ski, characterized in that the device comprises a on the top (8) of the ski body arranged and with respect to this un adjustable support (3) with 2 side cheeks (5), the obliquely down to the bottom of the snow running, in this depressible, undeformable and non-adjustable fins (7), the fins above the plane of the sliding surface of the ski (6) are fixed and by the edge of the ski when driving through a curve in the operative position can be brought. 2. alpine ski according to claim 1, characterized in that the fins (7) of both side cheeks (5) reflect in the plane of symmetry of the ski and are arranged to this at an acute angle, with the opposite fins running down to the snow ground. 3. alpine ski according to claim 2, characterized in that at least one pair of opposite fins (7) entirely or partially below the ski boot is fixed on the top of the carrier (3) by means of a commercially available bond (2,4) becomes (Fig.1.1b). 4. alpine ski according to claim 2, characterized in that the carrier (3) under the rear jaw of the ski binding (2) is bent and its rear part (9) counter to the direction at an acute angle to the top of the ski body (1) extends upwards and at least one pair of opposed fins (10) is attached to its two side cheeks (Figure 2.2b). 5. alpine ski according to claim 4, characterized in that from the ascending rear part of the support (9) lying in the plane of symmetry of the ski fin (12) projects down to the bottom of the snow, where they in the direction of the direction of all pairs of fins (10) of the rear support member (9) and its lower edge (13) extends deeper than the lower edges of the latter (Fig. 2,2b).