EP0249895B1 - Ski - Google Patents

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Publication number
EP0249895B1
EP0249895B1 EP87108465A EP87108465A EP0249895B1 EP 0249895 B1 EP0249895 B1 EP 0249895B1 EP 87108465 A EP87108465 A EP 87108465A EP 87108465 A EP87108465 A EP 87108465A EP 0249895 B1 EP0249895 B1 EP 0249895B1
Authority
EP
European Patent Office
Prior art keywords
elements
ski
ski according
sliding
sole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87108465A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0249895A2 (de
EP0249895A3 (en
Inventor
Wolfgang Dr. Dipl.-Chem. Burger
Gert Wloka
Helmut Dip.-Wirt.-Ing. Sommer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Feldmuehle AG
Original Assignee
Feldmuehle AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Feldmuehle AG filed Critical Feldmuehle AG
Priority to AT87108465T priority Critical patent/ATE63838T1/de
Publication of EP0249895A2 publication Critical patent/EP0249895A2/de
Publication of EP0249895A3 publication Critical patent/EP0249895A3/de
Application granted granted Critical
Publication of EP0249895B1 publication Critical patent/EP0249895B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/04—Structure of the surface thereof
    • A63C5/044—Structure of the surface thereof of the running sole

Definitions

  • the present invention relates to a ski according to the preamble of the main claim.
  • the usual skis have a sliding zone in their front area, which is close to the ski tip and at their end. In the unloaded state, only these sliding zones come into contact with the snow or ice surface. Only when there is a shift in weight of the skier, do the areas of the outsole lying below the ski boot come into contact with the ground as a result of the sagging of the ski. Seen in this way, the nature of the sliding zones is an essential factor for the sliding ability of the ski and also a determining factor for the speeds that can be reached, especially on descents where the lowest possible frictional resistance between the sliding zones and the ground is desired. It is therefore endeavored to keep the entire outsole of the ski, in particular, however, the sliding zones, in a flawless condition which enables high speeds to be achieved.
  • a positive connection of a metallic tread covering the entire ski underside to the wooden ski body is known from CH-A-271 670.
  • a suitable holding device is intended to cause the tread, which is preferably made of light metal, to be displaceable relative to the wooden ski body. Due to the constant stress on the holding device, there is a risk that the tread will be detached from the ski body and another disadvantage may be the low wear resistance of metallic alloys, in particular aluminum.
  • continuous tread edges made of hard materials are provided, preferably coatings of metal carbides with additions of metals (hard metals) and mixtures of ceramic materials with metals (cermets). Ceramic materials are also mentioned, but it is stated in a restrictive manner that the formation of the tread edges as a whole should only be considered if the hard materials have sufficient elasticity.
  • the object of the invention is to provide a ski which has good sliding behavior, has low wear behavior in its sliding zones and in which the sliding surfaces lying in the sliding zones are designed such that the usual bending stress does not lead to the occurrence of Cracks or other damage to the sliding surfaces.
  • the invention provides the characterizing features of a ski according to the preamble of claim 1.
  • Suitable ceramic materials for the production of the elements in the form of sintered shaped bodies are partially stabilized zirconium oxide of the PSZ or TZP type, aluminum oxide, silicon carbide, silicon nitride or silicon aluminum oxynitride.
  • Zirconium oxide in particular has proven to be particularly suitable, since this material leads to particularly good sliding behavior on snow and ice, also has a particularly high flexural strength and fracture toughness, a relatively high impact resistance and also a certain elasticity.
  • Aluminum oxide is particularly preferred from an economic point of view and also allows the production of particularly complicated shapes.
  • aluminum oxide has a relatively high hardness.
  • Silicon carbide is because of its low specific gravity preferred. Other advantages are the extraordinarily high hardness and the low R a value (arithmetic mean roughness). As a result, favorable sliding properties are achieved.
  • pressure-free sintered or hot-pressed silicon carbide is preferred.
  • silicon nitride also result from the low specific weight, its high flexural strength and high wear resistance. Silicon nitride sintered without pressure is particularly suitable.
  • a particularly preferred embodiment of the invention provides that the sliding surfaces are formed from elements in the form of all-ceramic, film-like sintered shaped bodies, the sintered shaped bodies having thicknesses in the range from 0.5 to 1.5 mm. The thickness is preferably even smaller and is 0.8 to 1.2 mm.
  • Such sheet-like sintered moldings are produced by molding, for example by casting and subsequent punching out of a mass which consists essentially of a temporary organic binder and, moreover, of the ceramic materials characterized by claim 4. After shaping, the organic binder is baked, the green body is sintered, then ground and the finished sintered body is connected to the ski, preferably by gluing. Then the outsole is ground flush so that all parts of the outsole form one level.
  • This embodiment is preferred because it allows using relatively thin ones and therefore to form very light sintered shaped bodies in the sliding zones of a ski, which have extremely good wear resistance and excellent sliding properties due to the high hardness of the sintered shaped bodies used.
  • This embodiment is also characterized by good flexibility of the ski body.
  • the elements can preferably be fastened non-positively and / or positively in the outsole. If elements are used which are either designed as fully ceramic sintered shaped bodies - but not in the form of a film - or metallic base plates coated according to the invention, such elements can expediently be provided with grooves, dovetails, pins or depressions. Fixing the elements by gluing has proven to be particularly suitable.
  • a particularly high torsional strength can be achieved by elements which are designed as all-ceramic sintered shaped bodies, but not in the form of a film, in particular if elements with a thickness of 3 to 6 mm are used.
  • the elements consist of metallic base plates coated with the titanium compounds and ceramic materials, the advantage is that the elements can be designed in almost any geometry and, viewed in this way, diverse possibilities for achieving a particularly good interlocking bond are possible.
  • the coating is applied to the metallic base plates, preferably only on the outsole side, the type of metal of course being matched to the coating materials used, in particular with regard to their thermal expansion coefficients.
  • the embodiment characterized by claim 8 has the advantage that the known manufacturing technology for introducing the reinforcing edge can be retained during ski manufacture.
  • a particularly suitable embodiment is created according to claim 10.
  • both a sufficient area within the sliding zones can be covered, in particular a width of the elements - measured in the running direction of the ski - from 65 to 95 mm of each element, in particular of approximately 80 mm, is suitable.
  • the formation of the elements in this width not only allows the formation of a sufficiently large sliding zone, it also enables the ski to deflect sufficiently high in a direction approximately perpendicular to the outsole.
  • the elements preferably the elements which are arranged in the sliding zone adjacent to the ski tip, are spherically curved to match the outsole on its underside and that the elements which are in the Are arranged in the region of the rear sliding zone, have a running groove which corresponds to the running groove as it is arranged in the outsole.
  • outsole used in the claims and description of the present application can also be understood in the case of a ski that is composed of several layers in a sandwich-like manner, the layers that are arranged further inside the ski following the outsole.
  • FIG. 2 shows a ski (1) with reinforcing edges (5) formed from links (7), an outsole (4) and elements (20) arranged in the region of the sliding zone (3), the outsole (4) of which assigned side form the sliding surfaces (30).
  • the elements (20) extend to the inner contour of the reinforcing edges (5), between the elements (20) at the connection points (9) there is a distance (A) which is 0.35 mm measured at the outsole (4).
  • A which is 0.35 mm measured at the outsole (4).
  • FIG. 3 differs from that shown in Figure 2 in that the sliding surfaces (30) having elements (21) are passed through the area of the reinforcing edges (5) and thereby in the area of the sliding zone (3; 3a) the reinforcing edge educate yourself.
  • FIG. 4 shows elements (20) designed as sintered shaped bodies with a trapezoidal cross section in order to achieve a positive connection.
  • the arrangement shown results in a V-shaped connection point (9) formed with the ski (1), by means of which the elements (20) are avoided in a particularly suitable manner when the ski (1) bends.
  • Sliding surfaces are each designated by (30) in FIG. 4 and the subsequent figures.
  • FIG. 5 also shows elements (21) designed as sintered shaped bodies, but with a rectangular cross section.
  • Figure 6 again shows in cross section trapezoidal formed as sintered elements (23), but which are arranged so that one of the elements to achieve a higher contact surface with the overlying layer (15) of the ski (1) only with his smaller base area (17) is assigned to the sliding zone.
  • FIG. 7 shows an element (24) consisting of a metallic base plate (8) and a coating (6) consisting of a titanium compound, which serves to form the sliding surface (30).
  • Figure 8 shows elements (22) with rounded edges (10) in the area of the connection point (9), the elements (22) are spherical on their underside (18).
  • FIG. 9 shows elements (25) with a parallelogram cross section.
  • FIGS. 10 to 12 show designs of elements (20) with profiles arranged transversely to the direction of travel (F), which improve the bond between the ski (1) and the element (20).
  • the element (20) shown in FIG. 10 is provided with a groove (11) provided to achieve a particularly good adhesive bond.
  • the element (20) shown in FIG. 11 has a web (12) which also serves to achieve a particularly good adhesive bond.
  • Figure 12 shows an element (20) with a dovetail (13).
  • Figure 13 shows an element (20), which on its the Formation of the sliding zone opposite surface has depressions (14) which serve to hold adhesive and thus a particularly secure non-positive connection with the overlying layer of the ski.
  • both an element produced by coating a metallic base plate with a titanium compound or ceramic material according to the invention and an element designed as a sintered shaped body in the various cross-sectional shapes, that is to say with a trapezoidal, rectangular, parallelogram-like cross section or with rounded edges, can be produced and thereby be provided on its surface opposite to that for forming the sliding zone with or without grooves, pins, dovetail, recess or similar formations.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Laminated Bodies (AREA)
  • Lubricants (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Ropes Or Cables (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Road Paving Structures (AREA)
  • Floor Finish (AREA)
EP87108465A 1986-06-14 1987-06-11 Ski Expired - Lifetime EP0249895B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108465T ATE63838T1 (de) 1986-06-14 1987-06-11 Ski.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3620078 1986-06-14
DE19863620078 DE3620078A1 (de) 1986-06-14 1986-06-14 Ski

Publications (3)

Publication Number Publication Date
EP0249895A2 EP0249895A2 (de) 1987-12-23
EP0249895A3 EP0249895A3 (en) 1988-09-21
EP0249895B1 true EP0249895B1 (de) 1991-05-29

Family

ID=6303021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108465A Expired - Lifetime EP0249895B1 (de) 1986-06-14 1987-06-11 Ski

Country Status (5)

Country Link
US (1) US4813699A (enrdf_load_stackoverflow)
EP (1) EP0249895B1 (enrdf_load_stackoverflow)
JP (1) JPS6340581A (enrdf_load_stackoverflow)
AT (1) ATE63838T1 (enrdf_load_stackoverflow)
DE (2) DE3620078A1 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5096217A (en) * 1988-12-01 1992-03-17 Kent Hunter Monoski with deep side cuts and cambered segment in the binding portion
AT394679B (de) * 1990-02-09 1992-05-25 Tce Technical Coatings Enginee Hartstoffbeschichtung an kufen von wintersportgeraeten
US5169169A (en) * 1991-02-07 1992-12-08 Crawford Matthew B Ski waxing system
FR2685213B1 (fr) * 1991-12-20 1994-02-11 Rossignol Sa Skis Semelle de ski.
US5344177A (en) * 1992-04-28 1994-09-06 Minnesota Mining And Manufacturing Company Ski base and running surface
FR2739299B1 (fr) * 1995-09-29 1997-12-12 Rossignol Sa Planche de glisse sur neige presentant une structure renforcee dans la zone de patin
DE19809721A1 (de) * 1998-03-06 1999-09-09 Linde Ag Thermisch beschichtete Kufe
FR2790206B1 (fr) * 1999-02-26 2001-04-06 Rossignol Sa Ski, ou autre planche de glisse sur neige telle qu'un surf
US6588772B2 (en) 2000-12-28 2003-07-08 The Burton Corporation Sintered sheet plastic material and gliding board base material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395928A (en) * 1966-03-17 1968-08-06 Eglit Barney Snow ski with porcelain running surface

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH190187A (de) * 1935-07-31 1937-04-15 Neuwirth Karl Metallschneeschuh.
CH271670A (de) * 1949-02-03 1950-11-15 Ackermann Martin Ski mit Laufbelag.
DE1578902A1 (de) * 1966-05-26 1970-10-15 Simon Fa Karl Seitenschiene fuer Skier
CH570178A5 (en) * 1974-02-19 1975-12-15 Mueller W Suomi Trading Cross country ski construction - has longitudinal running groove on either side of central binding
DE2651991A1 (de) * 1976-11-15 1978-05-18 Fritzmeier Ag Gleitbelag aus kunststoff fuer gleitkoerper auf schnee und eis, insbesondere fuer ski
DE2748177C3 (de) * 1977-10-27 1980-08-07 Pennekamp + Huesker Kg, 4426 Vreden Verfahren zur Herstellung von Skilaufsohlen
DE2940629A1 (de) * 1979-10-06 1981-04-16 Daimler-Benz Ag, 7000 Stuttgart Verfahren zur erzeugung oxidationsbestaendiger siliciumnitrid-sinterkoerper mit verbesserter mechanischer festigkeit
US4406668A (en) * 1982-05-20 1983-09-27 Gte Laboratories Incorporated Nitride coated silicon nitride cutting tools
GB2122097A (en) * 1982-06-15 1984-01-11 Jennie Louise Constable Skis
JPS59230570A (ja) * 1983-06-15 1984-12-25 株式会社小賀坂スキ−製作所 スキ−
US4702970A (en) * 1987-01-20 1987-10-27 Gte Laboratories Incorporated Composite coatings on ceramic substrates

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395928A (en) * 1966-03-17 1968-08-06 Eglit Barney Snow ski with porcelain running surface

Also Published As

Publication number Publication date
DE3620078A1 (de) 1987-12-17
ATE63838T1 (de) 1991-06-15
DE3620078C2 (enrdf_load_stackoverflow) 1988-06-09
US4813699A (en) 1989-03-21
EP0249895A2 (de) 1987-12-23
JPS6340581A (ja) 1988-02-20
DE3770341D1 (en) 1991-07-04
EP0249895A3 (en) 1988-09-21

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