EP0473898A1 - Langlaufski, insbesondere für die Praxis des abwechselnden Schrittes - Google Patents

Langlaufski, insbesondere für die Praxis des abwechselnden Schrittes Download PDF

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Publication number
EP0473898A1
EP0473898A1 EP91110816A EP91110816A EP0473898A1 EP 0473898 A1 EP0473898 A1 EP 0473898A1 EP 91110816 A EP91110816 A EP 91110816A EP 91110816 A EP91110816 A EP 91110816A EP 0473898 A1 EP0473898 A1 EP 0473898A1
Authority
EP
European Patent Office
Prior art keywords
cross
slot
country ski
ski according
ski
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.)
Granted
Application number
EP91110816A
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English (en)
French (fr)
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EP0473898B1 (de
Inventor
Alain Bejean
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.)
Salomon SAS
Original Assignee
Salomon SAS
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Filing date
Publication date
Application filed by Salomon SAS filed Critical Salomon SAS
Publication of EP0473898A1 publication Critical patent/EP0473898A1/de
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Publication of EP0473898B1 publication Critical patent/EP0473898B1/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
    • A63C7/00—Devices preventing skis from slipping back; Ski-stoppers or ski-brakes
    • A63C7/005—Devices preventing skis from slipping back, actuated by the boot
    • 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
    • A63C5/003—Structure, covering or decoration of the upper ski surface
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C7/00—Devices preventing skis from slipping back; Ski-stoppers or ski-brakes
    • A63C7/04—Fastening-devices for skins

Definitions

  • the present invention relates to cross-country skis, and more particularly to those used for the practice of classic, so-called alternative, steps as opposed to skater's steps.
  • a cross-country ski generally comprises a central portion arched at rest with upwardly convexity, delimited by two lines of contact with the ground, respectively front and rear, and separating this central portion respectively from the tip and the heel of the ski .
  • the support area of the skier's foot is located in the middle position relative to this central part, at least approximately.
  • this support of the foot manifests itself between the sole of the ski and the ground, essentially at two points or very restricted zones, well located.
  • the skier's foot is supported at the metatarsophalangeal joint, which defines the position of the fulcrum on the ski or impulse fulcrum. It is at this point that the maximum pressure is exerted to put the ski flat by elasticity against the camber of the central part.
  • This distribution along the sole of the ski is of great importance since it conditions the effectiveness of the impulse transmitted by the metatarsophalangeal support in the impulse phase and the quality of the slip when the heel is pressed.
  • FIG. 1 For a conventional ski intended essentially for alternative pitch, it can be seen, as illustrated in FIG. 1, that this distribution of pressure along the ski is not ideal.
  • This diagram represents the contact pressure on the ordinate, as a function of the position on the ski on the abscissa, between the tip S and the heel of the ski Ts, respectively in the impulse phase, in phantom, and in the sliding phase , in solid lines.
  • the impulse and heel support points are respectively referenced by Pi and T.
  • the present invention aims to eliminate this drawback or, at the very least, to reduce its importance significantly, by concentrating the pulse pressure on the area of the wax chamber 8.
  • the invention it is proposed to overcome, or at least to considerably reduce the importance of the disadvantages mentioned above, to spare in the thickness of the ski, in the area of the central part corresponding at least approximately at the foot of the skier's foot, an empty part or transverse slit crossing the ski to define two upper and lower beams respectively.
  • the upper beam by bending, comes into contact with the lower beam which in turn bends to generate the contact pressure with the ground which allows the impulse.
  • a shoe 4 is very schematically figured, highlighting evidence of the points of application of the efforts of the heel support T and of the impulse or metatarsophalangeal support Pi.
  • a vacuum is formed, for example in the form of a slot 5 of small thickness. This slot 5 defines a sharing zone by separating them, between two upper 6 and lower 7 beams respectively.
  • This longitudinal transversely traversing slot is located behind the so-called point of balance P1 of the ski, which corresponds to the location of the front end of the shoe 4. It also extends rearward to a point located near the point T where the bearing force of the heel of the shoe 4 is exerted in the sliding phase. preferably, the slot 5 is located in the thickness of the ski at the neutral fiber thereof.
  • the slot 5 performs two distinct functions.
  • the sliding phase (FIG. 4)
  • the heel T when the heel T is pressed, it digs upwards the wax chamber 8, mentioned above in the introduction, by a phenomenon of shearing induced between the upper beam 6 and the lower beam 7.
  • the impulse phase ( Figure 5) it allows the flattening optimally, that is to say with the maximum intensity, of the wax chamber 8 on the ground by pressing during the pulse Pi of the upper beam 6 on the lower beam 7.
  • the pulse point Pi located in the area of the slot 5 will be located in front of the center of the latter and preferably two-thirds of the latter. Indeed, it is noted that if the point of impulse Pi is centered longitudinally with respect to the slot 5, one does not obtain an optimal distribution of the contact pressures between the sole of the ski and the ground during the effort of impulse. This is illustrated by the diagram in FIG. 6 in a representation similar to that of FIG. 1, where we note on either side of the zone of the pulse point Pi, where we have a peak d 'intensity, two pressure ranges of intensity still very important. The pressures exerted correspond to a load equivalent to the normal weight of a skier, that is to say approximately 60 to 85 kgs.
  • the diagram in FIG. 7 shows the distribution of the contact pressures when the pulse point Pi is located, as said above, at two thirds of the slot 5 in the direction of the tip S of the ski.
  • the length of the slot 5 can obviously be variable and is a function of the length of the ski and the size of the shoe 4 of the wearer. It is clear that the more the length of the slot 5 will increase, the more the wax chamber 8 will tend to widen, and therefore the more the contact pressure will increase in this area during the impulse support Pi.
  • the length of the slot 5 can vary, for example between 150 and 300 mm depending on the bending stiffness of the upper beam 6. In a preferred area of 210 to 250 mm, only the pulse pressure Pi varies significantly and increases, the pressure in the area of the wax chamber 8 remains approximately constant.
  • the thickness of the slot 5 if it must be sufficient, must nevertheless remain relatively small, failing which the ski would be weakened too much. A thickness of the order of 2 to 4 mm turns out to give excellent results.
  • the slot 5 remains laterally open to the outside, untimely intrusions of snow, mud, gravel or other undesirable foreign bodies may occur. It is therefore possible to provide that the slot 5 is filled with an elastic material very easily deformable in compression, such as for example a plastic foam.
  • the slot 5 can also be laterally closed by a bellows or any other equivalent means.
  • the slot 5 which has just been described can furthermore be made in any type of ski, for example conventional as illustrated in cross section in Figure 8, of trapezoidal section curvilinear or not, as in Figure 9, or even of completely asymmetrical section (not shown).
  • the slot 5, in the various variants which have just been mentioned, can also be arranged obliquely, rectilinear or not, in the thickness of the ski, as shown in FIG. 10 in partial longitudinal section, falling from the zone from the heel T towards the point of impulse Pi.
  • This arrangement induces a gradation in the resistance to bending of the upper beam 6, this bending being stronger in the area of the point of impulse Pi, favoring the flattening of the wax chamber 8, but however, it tends to weaken the upper beam 6 in this area.
  • the slot 5 can be provided with variable thickness, this increasing from the heel T towards the point of impulse Pi. This arrangement has approximately the same advantages as that which has just been set forth immediately above.
  • the slot 5 by construction of a lower beam 7 gathering all the elements of mechanical resistance, namely, the core, the sole, the reinforcements, and. .. and an upper beam 6 of molded plastic material covering the slot over a length at least equal to the latter.
  • This beam may advantageously be provided with a longitudinal rib 61 in which a complementary groove 41 produced in the sole of the shoe 4 cooperates.
  • the assembly of the upper beam 6 to the lower beam 7 can be carried out by any means such as by gluing, vibration welding, and ...
  • Figures 16a and 16b show an advantageous solution to solve this problem: under the sole of the ski, at the wax chamber 8, a removable plate 63 supporting the anti-recoil system 64 can be put in place and removed quickly.
  • the lower beam 7 comprises at the level of the wax chamber 8 a recess 61 which may possibly have a width equivalent to the ski.
  • This recess 61 serves as a housing for a housing 62 fixed in the recess 61 by any means such as screwing, gluing, welding. This case can also be obtained directly during the manufacture of the ski by molding or machining.
  • a removable plate 63 advantageously made of plastic, comes to be embedded in the case 62 and holds in place by friction or snap-fastening.
  • the anti-recoil system 64 which it is desired to use under the ski. It suffices that the skier has several removable plates 63, with on each of them one or more anti-recoil systems to be able to choose at the last moment the system best suited to the circumstances. It is also possible that a removable plate 63 does not have an anti-recoil system on all or part of its surface.
  • FIG. 17a, 17b, 17c Another embodiment of the housing 62 and the removable plate 63 is shown in Figures 17a, 17b, 17c.
  • the case 62 shown here over the entire width of the ski, has 2 grooves 65, the removable plate 63 sliding in these grooves 65.
  • the groove 65 is removed in one end 66 in order to be able to flexively deform the removable plate 63, as shown in dotted lines 67 so that the removable plate 63 can pass over the rim 68 of the housing 62, as well during installation that during the extraction of the removable plate 63.
  • a notch 69, provided in the removable plate 63 (or in the rim 68) facilitates the maneuver to extract this plate.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Road Paving Structures (AREA)
  • Luminescent Compositions (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
EP91110816A 1990-08-24 1991-06-29 Langlaufski, insbesondere für die Praxis des abwechselnden Schrittes Expired - Lifetime EP0473898B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9010747 1990-08-24
FR9010747A FR2666021B1 (fr) 1990-08-24 1990-08-24 Ski de fond, notamment pour la pratique du pas alternatif.

Publications (2)

Publication Number Publication Date
EP0473898A1 true EP0473898A1 (de) 1992-03-11
EP0473898B1 EP0473898B1 (de) 1994-08-17

Family

ID=9399912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91110816A Expired - Lifetime EP0473898B1 (de) 1990-08-24 1991-06-29 Langlaufski, insbesondere für die Praxis des abwechselnden Schrittes

Country Status (6)

Country Link
US (2) US5292147A (de)
EP (1) EP0473898B1 (de)
JP (1) JPH04246383A (de)
AT (1) ATE109992T1 (de)
DE (1) DE69103497T2 (de)
FR (1) FR2666021B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2700477A1 (fr) * 1993-01-19 1994-07-22 Rossignol Sa Ski de fond.
FR2719782A1 (fr) * 1994-05-11 1995-11-17 Salomon Sa Dispositif pour ski de fond et ski équipé d'un tel dispositif.
FR2719780A1 (fr) * 1994-05-11 1995-11-17 Salomon Sa Dispositif pour ski de fond et ski équipé d'un tel dispositif.
EP3437702A1 (de) 2017-08-03 2019-02-06 Vladimír Míka Langlaufski

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066994A1 (de) 1998-06-25 1999-12-29 Fischer Gesellschaft Mbh Langlaufski
FR2807670B1 (fr) * 2000-04-14 2002-06-07 Rossignol Sa Ski alpin
FR2827785B1 (fr) * 2001-07-25 2003-11-07 Rossignol Sa Ski alpin
FR2827786B1 (fr) * 2001-07-27 2003-09-12 Rossignol Sa Ski alpin
US6659492B2 (en) * 2001-11-15 2003-12-09 Michael B. Gousie Ski for uphill and downhill skiing
US7823892B2 (en) * 2007-05-04 2010-11-02 Quiksilver, Inc. Snowboard
FI20075784L (fi) * 2007-11-05 2009-05-06 Mikko Tilli Suksi
AT508684B1 (de) * 2009-09-08 2012-06-15 Atomic Austria Gmbh Ski, insbesondere langlaufski, mit wenigstens einem mittel zur rückgleithemmung
AT510559B1 (de) * 2010-11-16 2012-05-15 Atomic Austria Gmbh Langlaufschi mit wenigstens einem mittel zur rückgleithemmung
SE537602C2 (sv) * 2011-12-16 2015-07-21 Mats Cedervall Längdskida för utövande av klassisk längdskidåkning
EP2745886A1 (de) 2012-12-21 2014-06-25 ATOMIC Austria GmbH Schi oder Snowboard mit einem Mittel zur Beeinflussung seiner Geometrie sowie Verfahren zu dessen Herstellung
WO2015094081A1 (en) * 2013-12-16 2015-06-25 Inadco Ab Ski and method for manufacturing a ski
AT516811B1 (de) * 2015-01-30 2017-10-15 Fischer Sports Gmbh Langlaufski

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986004824A1 (en) * 1985-02-15 1986-08-28 Walter Kuchler Sliding device, particularly an alpine ski
DE3619118A1 (de) * 1986-06-06 1987-12-10 Wilfried Matt Ski
DE3929625A1 (de) * 1988-10-18 1990-04-19 Fischer Gmbh Ski

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE696576C (de) * 1937-04-02 1940-09-25 Jaroslav Cerny Ski
US2196925A (en) * 1939-04-24 1940-04-09 Peter J Kairis Ski
DE2259375A1 (de) * 1972-12-04 1974-06-12 Heinrich Bellan Verfahren und vorrichtung zur verbesserung der lenkfaehigkeit von schier
DE2741622C2 (de) * 1976-09-16 1982-04-22 Hitachi, Ltd., Tokyo Einrichtung zum Steuern der Schweißparameter eines umlaufenden Lichtbogen-Schweißkopfes
CH608720A5 (de) * 1976-12-21 1979-01-31 Henri Philippe Nidecker
AT351415B (de) * 1977-02-04 1979-07-25 Kaestle Gmbh Langlaufski
CH671887A5 (de) * 1982-03-25 1989-10-13 Brosi Bettosini
FR2631844B1 (fr) * 1988-05-31 1990-09-07 Salomon Sa Chaussure de ski de fond
FR2652271B1 (fr) * 1989-09-28 1992-01-10 Salomon Sa Dispositif antirecul pour ski de fond.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986004824A1 (en) * 1985-02-15 1986-08-28 Walter Kuchler Sliding device, particularly an alpine ski
DE3619118A1 (de) * 1986-06-06 1987-12-10 Wilfried Matt Ski
DE3929625A1 (de) * 1988-10-18 1990-04-19 Fischer Gmbh Ski

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2700477A1 (fr) * 1993-01-19 1994-07-22 Rossignol Sa Ski de fond.
FR2719782A1 (fr) * 1994-05-11 1995-11-17 Salomon Sa Dispositif pour ski de fond et ski équipé d'un tel dispositif.
FR2719780A1 (fr) * 1994-05-11 1995-11-17 Salomon Sa Dispositif pour ski de fond et ski équipé d'un tel dispositif.
WO1995031260A1 (fr) * 1994-05-11 1995-11-23 Salomon S.A. Ski de fond
WO1995031259A1 (fr) * 1994-05-11 1995-11-23 Salomon S.A. Ski equipe d'un dispositif pour ski de fond
US5829776A (en) * 1994-05-11 1998-11-03 Salomon S.A. Device for cross country ski and ski equipped with such a device
EP3437702A1 (de) 2017-08-03 2019-02-06 Vladimír Míka Langlaufski

Also Published As

Publication number Publication date
EP0473898B1 (de) 1994-08-17
FR2666021A1 (fr) 1992-02-28
FR2666021B1 (fr) 1992-11-13
ATE109992T1 (de) 1994-09-15
DE69103497T2 (de) 1994-12-08
JPH04246383A (ja) 1992-09-02
US5427400A (en) 1995-06-27
US5292147A (en) 1994-03-08
DE69103497D1 (de) 1994-09-22

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