LV13085B - Skis with particular structure of front end and slide face - Google Patents

Abstract

A ski offered is characterized in that - the front end of ski is designed in conformity with guide face structure of high-speed boat, and it is wider than rear part, - the sides of ski are formed sloping inwards and are sheeted - the bottom side of ski is curved upwards, and it is provided with grooves fulfilled with porous plastic material, which is saturated with ski liniment by injection, - the bottom side of ski is covered with bristly perforated leather, which is cut out so that bristles flatter with regard to skiing direction and do not impede the skiing, but leather incorporated in bottom side of ski prevents the backslipping when skier ascends the hill, and in that - forming of ski liniment layer between exterior surface of said leather layer and snow is carried out in the similar way as it happens using hydrostatic lubrication method, i.e., the liniment is being delivered to external layer of perforated leather through its capillaries by help of pressure created by skier's self-weight, thus during the skiing it moistens the leather and decreases the surface friction coefficient.

Description

DESCRIPTION OF THE INVENTION

The invention relates to all types of skiing, mainly to increase speed on distance or downhill.

The object of the invention is to ensure that the skier can move along the snow surface at a steady speed (v), a certain force must be exerted to overcome the frictional force caused by the rubbing of one body (ski) against the other body (snow).

The cause of the frictional force is: a) the molecular forces acting between the molecules of the bodies in motion; b) the component of the earth's gravity, F, which presses the sliding body against the uneven snow surface. The friction force (B) in the latter case is proportional to the said gravity component:

Β = μ F, where μ is the slip factor which depends on the properties of the contact surfaces of the bodies, the material of the bodies, the properties of the surfaces, the lubrication, the speed of movement, the molecular forces and so on. A distinction is made between static and dynamic friction coefficients.

The skiing process is investigated experimentally, using a method of comparison of measurement results, which aims at obtaining a minimum slip coefficient of friction (s) for the external surfaces of bodies, under various combinations of friction bodies and under different operating conditions of their surfaces.

In the experimental evaluation of the friction process, one body (snow) remains unchanged, while the coverage of the active part of the lower body (ski) (ski lubricant) is usually variable and is adapted to specific environmental conditions.

Summary of the Invention

It is proposed to mill channels in the lower active part of the ski surface and to place plastic with open channel pores, ie open pores at both ends, with wet ski grease and perforated skin with wet ski grease. and wetting the active part of the skin surface, and offering to make the ski head wider than the back, with the sides of the ski tilted inwards and warmed up, and the bottom of the ski curved upwards. It is proposed to ensure the compatibility of said bristles with the direction of skiing (by feather) by choosing the direction of cut of the leather strips from the skin raw material and the porous plastic to ensure the formation of a ski grease layer between the skin and the snow with hydrostatic lubrication. , which has open channel pores that are open at both ends.

-2 In the invention, the ski head is formed according to the design of a speedboat guide so that the sharp part of the guide crosses the snow bar by sliding sideways and extending in width and height, and lifting the ski head by means of the side profile of the guide. The sides of the ski are tilted inward and snow-plated with a stainless steel strip, the ski head is wider than the back, and the lower active part of the ski is curved upwards - all for skiing and skating, provide a sharp kick.

The proposed ski construction and its basic elements are conceptually shown in Figs. 1 and 2, where:

Fig. 1 ski head (head) shown separately: (a) - bottom view, (b) top view, but ski and its head together shown: (c) - front view, (d) left side view, and Fig. 2 ski and its head together shown in bottom view a) - exposing skis-milled channels 7, b) - exposing greasy perforated skin 9 with bristles 8, ski wet lubricant outlet holes - capillaries 10 and location of ski wet lubricant recharge or wash holes 11 in ski length and width c) Figure A - A shows a cross-section of the ski, showing the transverse orientation of all ski elements 7 to 9 and 11 to 16.

»

The following designations are used in the accompanying drawings:

1, 2, 4, 5, 6, 13 - ski head (bottom, front, top, top, left, back and profile A-A, respectively),

3, 3.T, 3.2 - ski (front, side and bottom, respectively, with skin on),

- channels grooved on the underside of the ski,

- leather bristles,

- perforated greasy leather with bristles 8,

- ski wet lubricant outlet holes - capillaries,

- ski lubricant recharge or wash holes,

- ski siding,

- plastic with open channel pores which are open at both ends,

- upward curvature of the ski,

- the slope of the ski.

x and y are the width of the ski head and rear, respectively, where x> y.

The proposed ski construction solutions are shown in the following example, including a description of the assembly of the ski:

- made of wood or plastic,

- grooves (7) on the back of the skis,

- creates a ski head (4) and glues it onto the ski (3),

- the skis (3) glue the stainless steel cladding (12) on both sides,

- the channels (7) formed at the bottom of the ski are filled with plastic (14) having pores forming open channels which are open at both ends,

-3-plastic (14) filled with ski wet grease using hydrostatic lubrication,

- cutting off greasy, discolored skin (9), with the bristles (8) parallel to the side of the ski (12) with the root of the bristle at the top of the skis and running along the feather,

- the skin is perforated so that the lubricant outlet holes (10) and the lubricant fill holes (11) are on the axis of symmetry of the channels (7),

- impregnating the perforated skin (9) under pressure with a ski wet lubricant in an autoclave (without vacuum stage), and

- sticks to the bottom of the ski.

Similarly, the invention may be accomplished by performing all the steps described above if a horizontal plane is formed in place of the deflection (15) shown in section A-A.

The components of the wet ski grease formulation may vary depending on the ambient temperature, but in all cases the final grease product obtained must meet the following requirements;

(1) the viscosity of the grease, within the limits of the ambient temperature range established at the ski area, shall not be changed; practically every set of grease should be prepared for each temperature interval depending on the snow parameters;

(2) the lubricant applied to the oily skin should be moisturizing;

(3) The filling, replenishment or washing of the grease must be effected by injection through the filling holes (11).

The wet ski grease is applied by hydrostatic lubrication, ie when the skier is on the skis, the skins skin (9) is pressed against the snow, the reaction of the skin (9) against the porous plastic (14) in the canals (7) the grease through the capillary holes (10) wet the outside of the skin (9), thereby forming a layer of grease between the ski and the snow, which is necessary to reduce the coefficient of friction. Do not allow the skins to be dried when dry. Leather bristles do not interfere with feathers, but when sliding down a hill, they prevent slipping. The length of the bristles may vary depending on their consistency, snow condition and ski slope profile.

The skis described in the invention are not suitable for all types of skiing, but are mainly intended for cross-country skiing and downhill skiing.

Claims (4)

Claims of the Invention 1. A hide characterized in that its head is formed by the principles of a speedboat guide; - ski head wider than the back, - the sides of the ski are inclined inwards and trimmed, - the bottom of the ski is curved upwards, - the skis have grooved channels, which are filled with porous plastic, - the bottom of the ski is covered with oily, saggy and perforated skin, the bristle direction of which coincides with the ski direction; - Porous plastic filled with wet ski grease. Skis according to claim 1, characterized in that they are provided with ski grease filling holes (11), which are filled with wet ski grease by injection method into the porous plastic (14) in the channels (7). 3. A ski as claimed in claim 1 or 2, wherein the bristle direction is matched to the ski direction (by feather) by selecting the cut strip direction from the skin raw material, respectively. Skis according to any one of the preceding claims, characterized in that the porous plastic to provide a ski grease film between the skin of the ski and the snow by means of a hydrostatic lubrication method is selected from the group of plastics having openings forming pores at both ends. are open.