FI62223C - ELEMENT - Google Patents

Description

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c exam passed 10 12 1932

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Ratsut och registerstyrelsen Ansöfcan uthgd och utUkrtfMn publicarad. uo. od (32) (33) (31) Pnrf · ** / «TOUCHTOU — a« ftrd prforkat (71) Pentti Porkka Oy, 15870 Salpakangas, Finland-Finland (FI) (72) Pertti Keskikylä, Lahti, Finland-Finland ( FI) (7 * 0 Papula Rein Lahtela Oy (5 * +) Elementti - Element

The invention relates to an element comprising a frame in which two adjacent ski grooves are formed for installation on a platform like a track.

U.S. Pat. No. 3,751,935 discloses a system for freezing and maintaining the gutter of a skating rink or toboggan run and for maintaining a layer of snow for skiing. The ice rink and the toboggan run are frozen in the usual way by adding water. on the track and causing it to freeze by special freezing machinery. Furthermore, a special track element is known from Finnish patent publication 54858, which can be connected together as trails out on the terrain, where skiing can be practiced in peace and away from the streets and roads.

Nowadays, the aim is to extend the skiing and downhill season with various artificial trails and jumping hill top layers. Significant results have been achieved with such artificial snow-replacing artificial tracks and surface layers; however, they have not been able to compensate for the skiing and downhill conditions created by natural snow.

62223

During the winter, especially in the spring and winter, skiing and downhill competitions often have to be canceled due to melting snow and the resulting poor skiing and downhill conditions. Artificial snow and the transfer of snow to the tracks and the hill incur very high costs, in low snow and warm conditions these measures do not produce results.

The object of the present invention is to provide an element which can be used, especially in low-snow conditions, as a piste element in skiing and in particular downhill skiing.

With regard to the features characteristic of the invention, reference is made to the claims.

The element according to the invention is based on an element with cooling piping forming two adjacent ski grooves like a track. The cooling piping is. suitably covered with a metal plate to conduct heat from the bottom of the ski grooves to the cooling pipes. Further, the piping is suitably insulated from the substrate to isolate and / or minimize heat conduction from the substrate to the cooling tubes.

A track can be built from the elements according to the invention; the element is particularly well suited as a jump element for a jump hill. In this case, some surprising advantages are achieved when using the element. The trail can be frozen in the ski track of the element at any time of the year and in any weather. In this case, the hill can be used even in summer when building your descent, for example, from artificial slippery plastic material. Furthermore, thanks to the invention, in the event of a surprise shelter in winter, the flywheel, from which the snow usually melts first, can be frozen regardless of the air temperature. Furthermore, when using an accelerator hill constructed of the elements according to the invention for winter time in hill racing, the sliding characteristics of the track remain completely similar for each jumper; if necessary, the hill can be frozen even in the middle of the race again if deemed appropriate. The invention thus offers the possibility of arranging completely similar competitive conditions for each competitor.

3 62223

The invention will now be described in detail by means of exemplary embodiments with reference to the accompanying drawing, in which Figure 1 shows a perspective view of an element according to the invention in cut-away, and Figure 2 shows a section along the line II-II in Figure 1.

Figure 1 shows a track element comprising a frame, in which two adjacent ski grooves 2 are formed. The element is entirely elongate in the direction of the ski grooves 2.

The cooling tubes 4 are parallel to the ski grooves 2 and are each covered with a thermally conductive plate, such as a metal plate 5. Said metal plate 5 further forms the bottom of the ski groove 2. The metal plate 5 conducts heat from the bottom of the ski groove to the cooling pipes 4.

An insulating layer 6 is placed under the cooling pipes 4, which makes it difficult for heat to be transferred from the substrate 3 to the cooling pipes 4 and thus reduces waste heat. The cooling tubes 4 are embedded in a contact mass 10 having the highest possible heat transfer coefficient to increase heat conduction from the plate 5 to the cooling tubes 4. The heat transfer coefficient of the plate 5 and the contact mass 10 is significantly higher than the insulating layer 6, e.g.

Figure 2 shows the structure of the element in detail. The body 1 of the element comprises a washer 7 for mounting the element on the base 3. Parallel side walls 8 are mounted side by side on the washer 7, forming two equally wide ski grooves 2 and delimiting them laterally. Furthermore, an insulating layer 6 is superimposed on the base plate 7 between the side walls 3, a spacer plate 9 on top of the insulating layer, cooling pipes 4 embedded in the contact mass 10 on top of the spacer plate and a metal plate 5 on top. to prevent slipping when using a track made of elements.

The insulating layer 6 may be, for example, polyurethane, polystyrene or another such insulating material. The base plate 7 can be, for example, aluminum, other metal, fiberglass, polystyrene or the like plate material. The vertical side walls 8 can be made of, for example, polyethylene, polystyrene, other plastic, fiberglass or the like. The spacer 9 may be, for example, aluminum, other metal, polystyrene, polyethylene, other plastic, glass wool or the like sheet material. The cooling pipes 4 are preferably copper, aluminum or other metal. The cover plate 5 is suitably made of aluminum or another metal. The friction layer 11 may consist of, for example, quartz sand, plastic grit, etc. friction layer glued on the plate 5.

The elements are connected in succession in the form of a track and are connected to a conventional cooling mechanism via ducts 12.

The working examples are intended to illustrate the invention without limiting it in any way.

Claims (4)

5,62223 An element comprising a frame (1) in which two adjacent ski grooves (2) are formed for mounting on a base (3) in a track-like manner, characterized in that cooling pipes (4) for cooling the ski grooves (2) are mounted on the frame (1) at the ski grooves. Element according to Claim 1, characterized in that the cooling tubes (4) are parallel to the ski grooves (2) and covered with a metal plate (5) forming the bottom of the ski groove for conducting heat from the bottom of the ski groove to the cooling tubes. Element according to Claim 1 or 2, characterized in that an insulating layer (6) is arranged under the cooling pipes (4>) in order to minimize the conduction of heat from the substrate (3) to the cooling pipes (4). Element according to one of Claims 1 to 3, characterized in that the element comprises a washer (7) for mounting on the base (3) and side walls (8) mounted on the base, laterally delimiting each ski groove (2), the base plate being superimposed between the side walls. an insulating layer (6), a spacer plate (9), cooling pipes (4) inside the contact mass (10) and a metal plate (5) on which a friction layer (11) is formed.