WO1996022135A2

WO1996022135A2 - Alpine skis

Info

Publication number: WO1996022135A2
Application number: PCT/BG1995/000014
Authority: WO
Inventors: Emil Georgiev Trifonov; Todor Georgiev Ralchev
Original assignee: Orion Ski S.A.
Priority date: 1994-12-30
Filing date: 1995-12-29
Publication date: 1996-07-25
Also published as: BG99324A; WO1996022135A3; BG61865B1

Abstract

The invention is applicable to Alpine skis with extremely high maneuverability for easy turning, including reverse turning on various snow terrain, on various slopes and giving ability for control, stability and security of the skiers, the radius of these ski's length of the waist being from 16 to 19 meters, and the form of these ski's length being extended thus increasing the line of contact with the snow.

Description

ALPINE SKIS

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an Alpine skis with extremely high maneuverability for easy turning, including reverse turning over various snow terrain, on various slopes, and giving ability for control, stability and security for the skiers.

The Alpine skis subject to this invention can be used as effective means for training of beginners or medium trained skiers, and for joy for good skiers when passing over rough snow terrain and distances in fresh snow.

2. Description of Related Art

Known are Alpine skis having a bottom camber, a side camber, and a single waist - a narrower midsection, within which the side camber defines the minimum width of the skis, and the width of the skis being increased in the rearward direction of the ski. (1 ) US P 4 715 612.

Disadvantages of the known Alpine skis are: comparatively short ski's length of the waist, and small widths at the tip, center and at the heel which are close to the respective widths of the standard Alpine skis and which are as a result of the big radius of the ski's length of the waist, about 48 m, leading to difficulties for the skiers to balance at reverse turns.

SUMMARY OF THE INVENTION

It is an object of the invention to provide a new alpine ski design with extremely high maneuverability, with a bottom camber, a side camber, and a special waist - a narrower midsection, within which the side camber defines the minimum width of the skis. The width of the skis being increased in the rearward direction of the skis. The radius of the ski's length of the waist is within 16 -19 m for ski comprising an overall length of 170 cm to 205 cm, and specifies widths at the tip within 104 - 111 mm, center within 59 - 65 mm, and width at the heel within 89 - 98 mm, and the form of the ski's length of the waist is extended thus increasing the line of contact with the snow.

The advantage of the Invention is that the suggested Alpine skis design makes the control easy because of the extremely high maneuverability of the skis which is a result of the improved design including extended ski's length of the waist and optimal widths at the tip, center and heel achieved through the small radius of the ski's length of the waist used for its construction. This design of Alpine skis subject to this invention will assist the skiers to overcome the reaction force of the support by substantial decrease of this force and its distribution on a wider surface. The extended ski's length of the waist helps for easy turning including reverse turnings because considerably less efforts are necessary to be done by the skiers when entering turns as the skis are more stable due to the longer line of their contact with the snow. As a result of decreasing the ski's length of the waist radius the range of the radius allows grooving at a shorter section, i.e. there is a perfect grooving when passing over iced terrain because of no aside sliding and concentration of efforts on one point.

The extended ski's length of the waist, the maximum widths at the tip and at the heel, and the much narrowed center allow minimum possible sinking in the snow at turns and unimpeded control on the skis over rough snow because of the considerably larger surfaces along which the acting forces and the weight of the skier are distributed.

BRIEF DESCRIPTION OF THE DRAWINGS

The enclosed Fig. 1 is an illustration of Alpine skis showing the essence of the design changes (overhead view of Alpine ski of the new design) .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

According in a preferred embodiment of the present invention there is provide an Alpine skis with a bottom camber, side camber, and single waist — a narrower midsection within which the inside curve specifies the minimum width A of the skis. Width B of the skis is increasing toward their rear end, and width C is increasing toward their front end. The ski's length of the waist radius is 18 m for a length of 205 cm, thus: C=110 mm, A=64 mm, and B=98 mm. Table 2. shows compared figures for better illustration of the improved Alpine skis design subject to this invention. Table 2.

Length 205 cm/ Standard Skis ! Skis of the Same Invention

Width: Technical Level

A 68 mm 68 mm 64 mm

B 78 mm 83 mm 98 mm

C 88 mm 88 mm 110 mm

These dimensions are function of the length, the rear end of the skis being used as starting point for their measurement.

Table 3. shows the parameters of different lengths which represent different illustrations of design.

Table 3.

Length (cm) Width C (mm) Width A (mm) Width B(mm)

178 105 60 90

186 110 63 90

193 110 64 97

199 110 64 97

205 110 64 98

These A, B, and C ski widths are not fixed and they can vary within ( 1 mm depending on many factors as ski's design, flexibility, hardness, etc.

Skis subject to this invention can satisfy needs and requirements of both amateur and professional skiers. When entering a turn, the skier turns the skis at an angle to his/her current status by turning the skis and changing the position of his/her body, simultaneously exerting pressure upon the skis. As a result the skis are moved to the desired direction along the line tangent to the turn's curve. At the moment when the skis are moved along the tangent, the reaction force of the support, i.e. the sum of angular forces and gravity, increases very quickly and reaches high rates. In order control to be kept over the skis at this moment, a great part of this increased reaction of the support must be absorbed, i.e. the skier while turning must transfer, in some way or another, bigger weight onto the front/rear part of the skis. The expected arc of turning is kept while the force is increasing along the length of the skis toward their ends, and the body of the skier is changing (deviating from) its initial position. The balancing is difficult because in the final moment of the turning the skier appears to be in more and more bent position which, together with the increased reaction force of the support, makes the keeping of balance difficult, as well as the returning to initial position before next coming turn. Moreover, during reverse turning the angular forces act upon the skis on a large length and cause aside sliding especially over icy or hard terrain.

When skis of the same technical level are used, certain part of the reaction force of the support is absorbed during the turning without substantial deformation of the desired arc of turning, and less pressure is applied by the skier at the end of the skis because part of the reaction force of the support is absorbed in the rear part and arch of the skis thus helping the skier to be more straight and balanced on the skis. When Alpine skis subject to the invention are used, the skier remains in a maximum straight and balanced position on the skis because of the following factors:

The small radius of the ski's length of the waist requires minimum effort by the skier to be applied along the length of the skis toward their ends and minimum deviation of the body because the arc of the ski's length of the waist is very close to the arc of the turn.

The reaction force of the support, i.e. the sum of gravity and angular forces, is considerably less because of the described above factors and is absorbed by much larger contact surfaces along the length of the skis, considerable part of which is accumulated also under the form of elasticity power in the very skis because of the increased elasticity as a result of maximum narrowing in the center and maximum widening at the ends. The proposed ski design subject to invention allows much greater part of the energy during the turning to be absorbed and stored in the skis without deformation of the arc of the turning and with much less pressure to be applied at the ends of the ski.

The aside sliding over icy terrain or smooth slopes is almost zero because the line of angular forces on the ski is shortened, the effort is concentrated on one point and grooving on a very short section is achieved.

Claims

WHAT WE CLAIM IS:

1. Alpine skis with a with a bottom camber, a side camber, and a special waist - a narrower midsection, within which the side chamber defines the minimum width of the skis and the width of the skis being increased in the rearward direction of the skis, the radius of the ski's length of the waist is within 16 -19 m within length scope of 170 cm to 205 cm, and specifies widths within 104 - 111 mm at the tip, 59 - 65 mm at the center, and 89 - 98 mm width at the heel, and the form of the ski's length of the waist is extended thus increasing the line of contact with the snow.