EP0249894B1 - Ski - Google Patents

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Publication number
EP0249894B1
EP0249894B1 EP87108464A EP87108464A EP0249894B1 EP 0249894 B1 EP0249894 B1 EP 0249894B1 EP 87108464 A EP87108464 A EP 87108464A EP 87108464 A EP87108464 A EP 87108464A EP 0249894 B1 EP0249894 B1 EP 0249894B1
Authority
EP
European Patent Office
Prior art keywords
ski
running surface
surface edge
sintered
moulded bodies
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
EP87108464A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0249894A2 (de
EP0249894A3 (en
Inventor
Burger Dr. Dipl.-Chem. Wolfgang
Gert Wloka
Helmut Dipl.-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.)
Cessione cerasiv Innovative Keramik - Enginee GmbH
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 AT87108464T priority Critical patent/ATE61740T1/de
Publication of EP0249894A2 publication Critical patent/EP0249894A2/de
Publication of EP0249894A3 publication Critical patent/EP0249894A3/de
Application granted granted Critical
Publication of EP0249894B1 publication Critical patent/EP0249894B1/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
    • A63C5/048—Structure of the surface thereof of the edges

Definitions

  • the invention relates to the tread edge of a ski according to the preamble of claim 1.
  • tread edges made of steel, possibly made of surface-hardened or continuously hardened steel types.
  • the metallic reinforcing edges serve to reduce wear and are of great importance for the grip and guidance of the ski.
  • One-piece tread edges, made of steel, from web members connected to one another via the edge web are described in DE-A-35 10 545 and FR-A-21 27 650.
  • a ski is known from US-A-33 95 928, the entire outsole and thus also part of the tread edge is provided with a porcelain-like enamel coating which is applied to a metal plate connected to the wooden ski body.
  • the wear resistance of this known coating is very low, and there is also the risk that the bending stress that occurs when the ski is in use, due to the large-area coating on the entire underside, will lead to chipping, or at least to cracks in the coating.
  • the hard metals include the hard metals, preferably made of metal carbide or a metal carbide alloy with additions of metals, such as nickel or cobalt, and also the so-called cermets: that is, mixtures of ceramic materials with metals and ceramic materials.
  • the hard materials are preferably applied as a coating with a thickness of 0.5 mm. Provided that the tread edge is made as a whole from hard materials, the hard material should be one have sufficient elasticity.
  • the invention aims to provide a tread edge of a ski with improved durability and significantly increased wear resistance, so that regrinding is no longer necessary.
  • the invention aims to provide a tread edge with better sliding properties.
  • the invention provides the characteristic features of a tread edge according to the preamble of claim 1.
  • An advantageous embodiment for inserting individual sintered bodies into the ski with the aid of metallic elements is characterized by claim 4.
  • the arrangement of sintered shaped bodies according to the invention in the areas of the tread edge that are exposed to particularly high wear results due to the higher strength, in particular one high grain boundary strength of sintered shaped bodies, at a significantly lower wear compared to the known coatings.
  • the use of shaped sintered bodies eliminates the risk that coatings always flake off and that the coatings flake off their supports.
  • the measure that the tread edge is composed of individual sintered shaped bodies which are not connected to one another is of very significant importance, the sintered shaped bodies either being directly connected to the ski body or, according to the embodiment characterized by claim 4, the sintered shaped bodies consisting exclusively of ceramic material in individual, not interconnected metallic elements are inserted. Since the individual elements are not connected to each other, the flexibility of the ski body is retained.
  • the sintered shaped bodies or, if these are inserted into metallic elements the metallic elements at a distance in the longitudinal direction of the ski, since this causes the individual sintered shaped bodies or Elements when the ski bends is largely avoided.
  • a distance of 3/10 to 4/10 mm measured on the outsole side is particularly preferred.
  • zirconium oxide in particular has proven to be very particularly suitable, since this material leads to particularly good sliding behavior on snow and ice, moreover a particularly high flexural strength and fracture toughness, a relatively high impact resistance and also a certain elasticity disposes.
  • 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.
  • Mixtures consisting essentially of aluminum oxide and 1 to 30% by volume of zirconium oxide are also outstandingly suitable because they have good toughness.
  • Silicon carbide is because of its low specific weight compared to ferrous metals or the associated approx. 50% weight saving is preferred. Another advantage is 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.
  • the elements can be made of metal and an associated sintered molded body made of ceramic material by gluing or soldering.
  • the connection of such an element or an element which is designed as a sintered shaped body made of ceramic material with the ski or with its individual layers can be done by welding, gluing and embedding in the ski body.
  • the sintered shaped bodies can be provided with tongue and groove, toothing, dovetails or perforations made in their edge legs. In the same way, these or similar designs are possible with a sintered molded body which is inserted into a single metallic element.
  • the size and shape of the sintered body forming the tread edge according to the invention are to be matched to the respective intended use of the ski, sintered bodies which have a length of 25 to 100 mm as viewed in the direction of the ski and which have a width of approx. 4 mm.
  • the formation of the tread edge according to the invention in the area below the ski binding has proven to be particularly valuable.
  • a particularly expedient embodiment of the tread edge arises when the sintered bodies _ seen in side view _ are parallelogram or trapezoidal.
  • the trapezoidal shape enables minimal distances on the outsole, which should preferably not exceed 0.4 mm, but can be reduced to values of up to 0.05 mm in order to set a particularly good sliding behavior, with the distances in the area opposite the outsole being achieved at the same time a particularly good deflection are higher.
  • characters 1 and 2 are sectional views in partial ski sections of various embodiments of the invention characters 3 to 7 cross-sectional representations of individual elements formed in different geometries to form side rails characters 8 to 12 side views of side rails formed from individual elements.
  • a metallic, single element (21) along the adhesive area (13) with the layers (2), (3), (4) and (5) is inserted into the ski (1) and with the layers of the ski connected by gluing.
  • a sintered molded body (28) made of partially stabilized zirconium oxide is inserted into the element (21) and connected by a solder joint (14).
  • the sintered molded body (28) forms part of the outer sides (11) and (12) of the element (21).
  • FIG. 2 shows an embodiment in which the tread edge is formed from sintered shaped bodies made exclusively of ceramic material and along the adhesive area (13) the layers (2), (3), (4) and (5) of the ski (1) is glued.
  • This embodiment thus shows completely made of ceramic outer sides (11) and (12), so that the tread edge formed by elements (23) has an improved sliding behavior in its entire contact area.
  • Figures 3 to 7 show different profile embodiments, according to which the elements (21) or sintered body (23) can be designed to achieve a positive connection with the individual layers of the ski, which can lead to the elimination of the edge legs (8) , which are only indicated by dash-dotted lines.
  • Figure 8 pulls a tread edge (15), formed from spaced-apart sintered bodies (23) with end faces (7) formed at the connection points (19) at right angles to the outsole.
  • the distance A between the individual sintered bodies (23) at the connection points (19) is 0.35 mm.
  • the sintered shaped bodies are trapezoidal when viewed from the side trained so that V-shaped connection points (19 ') arise. This makes it possible to form the lower distance A 'near O (approx. 0.1 mm), which serves to improve the sliding properties.
  • FIG. 10 shows sintered shaped bodies (23 ⁇ ) combined to form a tread edge (15), the edges of which are rounded on the sides (7 ⁇ ) on the side facing away from the outsole. At the connection points (19 ⁇ ) the smallest distance A ⁇ (outsole side) is 0.1 mm.
  • Figure 11 shows a tread edge (15) formed from sintered body (23 ′′′), which have a parallelogram shape seen from the side and are arranged at the connection points (19 ′′′) with a distance A ′′′ 0.4 mm to each other.
  • the direction of travel is indicated by F.
  • the helix angle ⁇ is 30 °. The embodiment enables good sliding behavior.
  • Figure 12 shows a tread edge (15) formed from sintered bodies (23 ⁇ ⁇ ), which are chamfered at their end faces (7) with different angles ⁇ and ⁇ , so that there is a wedge gap with angle ⁇ .
  • This design combines the advantages of the design according to FIG. 9 (small distance) with that of FIG. 11 (low driving resistance).

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Lubricants (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Golf Clubs (AREA)
  • Railway Tracks (AREA)
  • Details Of Aerials (AREA)
  • Ceramic Products (AREA)
EP87108464A 1986-06-14 1987-06-11 Ski Expired - Lifetime EP0249894B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108464T ATE61740T1 (de) 1986-06-14 1987-06-11 Ski.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3620091 1986-06-14
DE19863620091 DE3620091A1 (de) 1986-06-14 1986-06-14 Ski

Publications (3)

Publication Number Publication Date
EP0249894A2 EP0249894A2 (de) 1987-12-23
EP0249894A3 EP0249894A3 (en) 1988-09-21
EP0249894B1 true EP0249894B1 (de) 1991-03-20

Family

ID=6303031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108464A Expired - Lifetime EP0249894B1 (de) 1986-06-14 1987-06-11 Ski

Country Status (4)

Country Link
EP (1) EP0249894B1 (enrdf_load_stackoverflow)
JP (1) JPS6340582A (enrdf_load_stackoverflow)
AT (1) ATE61740T1 (enrdf_load_stackoverflow)
DE (2) DE3620091A1 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627996B1 (fr) * 1988-03-02 1990-12-21 Seb Sa Ski a carres ameliorees
AT394679B (de) * 1990-02-09 1992-05-25 Tce Technical Coatings Enginee Hartstoffbeschichtung an kufen von wintersportgeraeten
JPH0426041U (enrdf_load_stackoverflow) * 1990-06-20 1992-03-02
FR2765113B1 (fr) * 1997-06-27 1999-08-20 Rossignol Sa Procede de preparation de carres pour planche de glisse et planche de glisse obtenue avec ces carres
DE10123674B4 (de) * 2001-05-16 2005-11-10 Stahlwerk Ergste Westig Gmbh Gleitkantenprofil
US20030189314A1 (en) * 2002-04-08 2003-10-09 Quattro Johnny S. Non-metallic edge gliding board
AT413796B (de) * 2004-03-08 2006-06-15 Moerth Marlene Gleitflächen, beläge, kanten und kufen von wintersportartikeln
DE102007020566A1 (de) 2007-05-02 2008-11-06 Christian Ziegler Kante oder Kufe für Wintersportgeräte

Family Cites Families (7)

* 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
DE1578902A1 (de) * 1966-05-26 1970-10-15 Simon Fa Karl Seitenschiene fuer Skier
US3700252A (en) * 1971-01-29 1972-10-24 Olin Corp Metal edge members for skis having varied lengthwise stress-strain ratio and skis including such members
AT339793B (de) * 1975-09-02 1977-11-10 Stugger Walter F Schneeski
JPS5525449A (en) * 1978-08-14 1980-02-23 Mitsui Toatsu Chem Inc Expandable thermoplastic resin composition
AT379313B (de) * 1984-04-16 1985-12-27 Deutsch Friedrich Skikante mit integriertem spitzen- und bzw. oder endenschutz
JPS61244379A (ja) * 1985-04-23 1986-10-30 住友電気工業株式会社 スキ−板

Also Published As

Publication number Publication date
ATE61740T1 (de) 1991-04-15
EP0249894A2 (de) 1987-12-23
EP0249894A3 (en) 1988-09-21
JPS6340582A (ja) 1988-02-20
DE3768712D1 (en) 1991-04-25
DE3620091A1 (de) 1987-12-23
DE3620091C2 (enrdf_load_stackoverflow) 1988-12-08

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