WO1993019824A1 - Ski alpin ameliore avec une structure simplifiee - Google Patents

Ski alpin ameliore avec une structure simplifiee Download PDF

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Publication number
WO1993019824A1
WO1993019824A1 PCT/US1992/002874 US9202874W WO9319824A1 WO 1993019824 A1 WO1993019824 A1 WO 1993019824A1 US 9202874 W US9202874 W US 9202874W WO 9319824 A1 WO9319824 A1 WO 9319824A1
Authority
WO
WIPO (PCT)
Prior art keywords
ski
top surface
ski according
opposing
shovel
Prior art date
Application number
PCT/US1992/002874
Other languages
English (en)
Inventor
D. Meatto Franklin
Original Assignee
Pacific Coast Composites, Inc.
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 Pacific Coast Composites, Inc. filed Critical Pacific Coast Composites, Inc.
Priority to PCT/US1992/002874 priority Critical patent/WO1993019824A1/fr
Publication of WO1993019824A1 publication Critical patent/WO1993019824A1/fr

Links

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
    • 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

Definitions

  • This invention relates generally to a ski structure. More specifically it is directed to a new and improved laminated ski structure that employs a solid synthetic structural beam as the main structural reinforcing member.
  • top surface stiffness adjusting grooves extend from the binding area forward toward the shovel and rearward toward the tai l.
  • continuous metallic sidewalls extend from the top edges downwardly to the bottom edges and are secured to the solid synthetic structural beam to provide both base and top surface wear protection.
  • the solid synthetic structural beam employed in the instant alpine ski is machined via routing and grinding in three dimensions to obtain the desired final shape and weight.
  • the solid synthetic structural beam is pulformed in the flat and subsequently laminated to a stiffening layer of unidirectional fiberglass and a bottom running surface.
  • an alpine snow ski that employs a solid synthetic structural beam of pulformed unidirectional fiberglass. It is an advantage of the present invention that an alpine ski is obtained which has a thinner side profile but still retains the stiffness distribution of a conventional ski.
  • an alpine ski is obtained which can have very soft flexural characteristics, but exhibit higher strength than traditional alpine skis of equivalent stiffness.
  • the solid synthetic structural beam provides sufficient binding retention in the binding mounting area so as not to require any additional reinforcement such as the usual weight increasing binding plate.
  • an alpine ski is produced by a simpl ified manufacturing process employing significantly fewer steps, a continuous manufacturing process to produce the primary central pulformed beam and an easily adaptable manufacturing method to obtain efficient operation whether at high or low production rates.
  • an alpine ski can be produced via an improved manufacturing process in which the sidecut geometry and contact lengths are easily changeable.
  • FIG.1 is a top plan view of a snow ski incorporating the structure of the present invention
  • FI6.2 is a side elevational view of the snow ski
  • FI6.3 is a sectional view taken along the lines 3-3 of FI6.2 showing the improved design of the ski to the rear of the binding area;
  • FIG.4 is a sectional view taken along the lines 4-4 of FIG.2 showing the cross section adjacent to the tai l of the ski;
  • FIG.5 is a sectional view taken along the lines 5-5 of FI6.2 showing the improved design of the ski in cross section forward of the binding area;
  • FIG.6 is a sectional view taken along the lines 6-6 of FIG.2 showing the cross section adjacent to the shovel of the ski.
  • FIGURE 1 shows a top plan view of the ski 1 0 having a pair of grooves 1 1 in the top surface 12 closest the shovel 14 and a corresponding pair of grooves 15 in the top surface 12 closest the tai l 16.
  • a binding mounting area indicated generally by the numeral 18 is located between the shovel ⁇ A and the tail 16 and can consist of a flattened surface area 19, into which the bindings (not shown) are mounted via binding screws placed into, for example, binding screw holes 20, and tapered sides 21 which extend angularly downwardly and outwardly toward the bottom running surface 22 of FIGURE 2.
  • Grooves 1 1 and 15 angle outwardly on their outboard side as they extend from the binding area 18 toward the shovel 1 4 and the tail 16, respectively. Grooves 1 1 and 15 also are tapered in depth relative to the top surface as they extend toward the shovel 14 and the tail 16 such that they are deeper nearest the binding area 18 and shallower nearest to the shovel 14 and the tail 16 to provide controllably designable weight and stiffness to the ski 10.
  • FIGURES 3 and 4 show this tapering effect for the tail 16 end and FIGURES 5 and 6 show this for the shovel 14 end.
  • FIGURE 2 also shows the camber of the ski 10 by the curvature of the ski 10 upwardly from the front contact point 24 and downwardly toward the rear contact point 25.
  • FIGURES 3 and 4 show cross-sectional views of the tail 16 end of the ski 10 taken along the section lines 3-3 and 4-4, respectively. Simi lar cross-sectional views of the shovel 1 4 end of the ski 10 taken along the section lines 5-5 and 6-6 are shown in FIGURES 5 and 6, respectively.
  • a protective cap 26 of suitably low temperature abrasion and cut resistant plastic such as polycarbonate-polyethylene terphthalate alloy or a thermoplastic polyester alloy or thermoset urethane either cast or RIM molded, is laminated to the solid central beam 28. Cap 26 conforms to the shape of the beam 28, which wi ll be described in further detai l immediately hereafter.
  • the beam 28 is preferably pulformed from fiber reinforced plastic and then machined and shaped to its desired contour, such as with computer numerical controlled grinding and/or routing apparatus.
  • the solid synthetic structural beam 28 has the tail grooves 15 and the shovel grooves 1 1 routed out to form a ski 10 with the desired stiffness distribution along the beam, and the desired flexural and torsi onal spring constants and dynamic properties, such as ski rate of return and vibration. Widening and/or deepening the grooves 1 1 and 15 results in a ski 10 of less stiffness along its entire length or at selected sections along its length.
  • the desired ski weight is facilitated by the machining of hollow shovel and tail channels 29 and 30, relative to the bottom surface 22, that are deeper nearer the binding area 18 and shallower adjacent the shovel 14 and tail 16, respectively.
  • tensile reinforcing layer 31 that is laminated to and underlies the main beam 28.
  • Layer 31 is formed of unidirectional fiberglass, preferably E- glass.
  • the bottom running surface 22 is formed of an ultrahigh molecular weight polyethylene and is laminated to the tensile reinforcing layer 31.
  • top and bottom metal side edges 34 and 35 are formed from a single continuous piece of metal forming the sidewall 36 of the ski 10, seen in FIGURES 3 thru 6.
  • Sidewall 36 is joined to the solid synthetic structural beam 28 of the ski 10 by flange or tongue 38 that extends into a groove in each side of the solid synthetic structural beam 28 and is secured in place by an appropriate adhesive (not shown).
  • the protective cap 26 fills in the space between the solid synthetic structural beam 28 and the metallic sidewall 36 and is appropriately contoured by grinding or routing, etc. to mate securely with the sidewalls 36 and the beam 28.
  • the continuous metallic sidewalls 36 are preferably formed of titanium, or a titanium alloy, such as a certifiable titanium/aluminum-vanadium alloy composition.
  • the sol id synthetic structural beam 28 can also be formed in the flat by prelaminating a stack of thinner beams with the highest portion being in the middle to achieve the desired stiffness distribution.
  • the stack of thinner beams would be laminated in a press with an appropriate adhesive, such as two component amine-based epoxy resin.
  • an appropriate adhesive such as two component amine-based epoxy resin.
  • the same type of an adhesive is used to laminate together in an appropriate press or presses the beam 28, the tensile reinforcing layer 31 , and the bottom running surface 22.
  • the cap 26 is laminated to the remaining structure last with an appropriate polyurethane or cyanoacrylate adhesive (not shown).
  • Additional multidirectional fiber laminates could be employed to provide off-axis reinforcement, such as torsional reinforcement, between the solid synthetic structural beam 28 and the tensile reinforcing layer 31.
  • additional fibers such as S-glass, carbon or polyaramid fibers such as that sold under the brand name KEVLAR by E. I. Dupont de Nemours & Co. could be employed in combination with the E-glass fiber reinforced plastic or in place of it.
  • the binding area 1 8 can have its sides 21 tapered at the desired angle to control the weight of the overall ski 10 by removing more or less material of the central beam or core 28 as desired. Beam 28 is sufficiently strong that the binding pullout strength is met merely with the beam itself.
  • the ski 10 in its preferred embodiment is constructed by first pulforming the solid synthetic structural beam 28 either in the flat by prelaminating a stack of thinner beams together or by pulforming a single beam.
  • the beam 28 is then contoured by machining in the top profile and the hollow bottom channels 29 and 30.
  • the grooves 1 1 and 1 5 are then machined into the top surface of the beam 28.
  • the solid synthetic structural beam 28, the tensile reinforcing layer 31 and the bottom running surface 22 are laminated together in a press with appropriate adhesives, such as two component amine based epoxy, polyurethane or cyanoacrylate adhesives.
  • This combined postformed beam is removed from the press and is shaped by grinding and/or routing to obtain the desired side angle and rough sidecut geometries.
  • the protective cap or top surface layer 26 is then applied to the top surface of the postformed beam.
  • the opposing sides of the postformed beam are then machined out to form the grooves to receive the flange or tongue 38 of the sidewalls 36 and to trim the excess material of the protective cap 36 in the finishing sidecut operation.
  • the sidewalls 36 are then inserted in the sidewall grooves and secured in place by use of the appropriate adhesive from the group previously named. Any finishing grinding operations for the bottom running surface 22 and the metallic sidewalls 36 are then performed. At this point, if the shovel 14 and the tail 16 were not previously molded, they can be attached by conventional methods.
  • RTM employs a preformed fiberglass mass that is assembled outside of a mold, similar in shape to the final ski shape, and is then placed in the ski mold. Resin is then injected from one end of the mold, while a vacuum is introduced from the other end to draw the resin through the fiberglass mass. The thus formed structure is then cured in the mold, removed, machined and assembled to its finished form. In compression molding, the fibers, either preformed or in strands, are put in resin in the mold and the mold is closed. The structure is then cured with heat and pressure, and removed. In this approach the blank is either molded into its desired final shape or is machined into its desired final shape after removal from the mold.
  • Reinforced reaction injection molding requires the use of high strength fibers as the reinforcing medium that possess a sufficiently high modulus of elasticity, as well as possessing the aforementioned desired cold temperature characteristics of suitable stiffness and elongation capability.
  • a pultruded beam construction technique employs the pulling of appropriate glass fibers through a resin impregnation tank or bath and then guiding the fibers into and drawing them through a heated die that is either tapered or straight.
  • the protective cap 26 can also be made by one of several techniques, such as thermoforming a thermoplastic material, injection molding or reaction injection molding suitable urethanes.
  • the plastics employed must possess the previously mentioned low temperature abrasion and cut resistance.
  • the thermoplastic resins used in both of the thermoforming and injection molding techniques must, in addition, possess the characteristic of being formable about a defined shape, such as, for example, a mandrel or be formable into a defined shape, such as, for example, with a mold.
  • the preferred technique for forming the cap 26 is thermoforming. In this technique the thermoplastic, such as a thermoplastic polyester sold under the trade-name of VANDAR by Hoechst Celanese, is thermoformed within a temperature range of about 200 ⁇ F to about 1000 ⁇ F.
  • polyethylene polyacrylonitrile, polycarbonate polyethylene terephthalate, polyimide, polyolefins, polyphenylene ether, polyphenylene sulfide, polypropylene, polysulfone, polyurethane, styrene acrylonitrile copolymers such as those sold under the trade-names of ROVEL by Uniroyal Chemical Company and Lustran by Monsanto Corporation, or thermoplastic elastomer materials.

Landscapes

  • Laminated Bodies (AREA)

Abstract

Dans un ski alpin, on obtient une structure stratifiée, simplifiée, en ménageant une planche renforcée par fibres de verre (28) stratifiée, sur le revêtement de traction, à une seule couche stratifiée (31) du matériau de durcissement et à une surface de glisse inférieure (22). Des rainures (11, 15) sont usinées dans la planche centrale renforcée par fibres de verre pour régler à la fois le poids du ski et sa rigidité, et une paroi latérale métallique continue (36) est ménagée entre les bords inférieurs et les bords supérieurs. Une garniture décorative (26) qui épouse le contour de la surface supérieure de la planche en fibres de verre est stratifiée à cette dernière.
PCT/US1992/002874 1992-04-06 1992-04-06 Ski alpin ameliore avec une structure simplifiee WO1993019824A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1992/002874 WO1993019824A1 (fr) 1992-04-06 1992-04-06 Ski alpin ameliore avec une structure simplifiee

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1992/002874 WO1993019824A1 (fr) 1992-04-06 1992-04-06 Ski alpin ameliore avec une structure simplifiee

Publications (1)

Publication Number Publication Date
WO1993019824A1 true WO1993019824A1 (fr) 1993-10-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
WO (1) WO1993019824A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042418A3 (fr) * 1997-03-25 1999-01-14 Boards Unlimited Sportartikel Planche de glisse
EP0914845A1 (fr) * 1997-11-06 1999-05-12 Franz Völkl GmbH & Co. Ski und Tennis Sportartikelfabrik KG Ski, planche à neige ou engin de glisse sur neige similaire
EP0937485A2 (fr) * 1998-02-24 1999-08-25 Franz Völkl GmbH & Co. Ski und Tennis Sportartikelfabrik KG Planche à neige, notamment un ski
US6189912B1 (en) 1997-03-25 2001-02-20 Boards Unlimited Sportarikel Gmbh & Co. Kg Slide board
US6357781B1 (en) * 1999-11-05 2002-03-19 Salomon S.A. Gliding or rolling board
AT500159B1 (de) * 2001-10-01 2006-06-15 Atomic Austria Gmbh Schi, sprungschi oder snowboard mit einer strukturierten oberfläche
US7077418B2 (en) * 2001-07-10 2006-07-18 Fischer Gesellschaft M.B.H. Light-weight construction core and a method for producing the same

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2277281A (en) * 1940-02-07 1942-03-24 William H Vinton Ski
US3918728A (en) * 1974-06-21 1975-11-11 Walter F Stugger Snow ski and edge
JPS526239A (en) * 1975-07-02 1977-01-18 Nippon Gakki Seizo Kk Ski
US4270768A (en) * 1977-08-01 1981-06-02 Nippon Gakki Seizo Kabushiki Kaisha Ski and a process for manufacturing same
US4409287A (en) * 1981-06-09 1983-10-11 Harrison Thomas B Ski protective device
US4537417A (en) * 1982-11-02 1985-08-27 Kastle Gesellschaft M.B.H. Ski, particularly a cross country ski
US4953884A (en) * 1987-07-15 1990-09-04 Salomon S.A. Ski having a variable width upper surface
US5141243A (en) * 1990-01-22 1992-08-25 Pacific Coast Composites, Inc. Alpine ski with a simplified construction

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2277281A (en) * 1940-02-07 1942-03-24 William H Vinton Ski
US3918728A (en) * 1974-06-21 1975-11-11 Walter F Stugger Snow ski and edge
JPS526239A (en) * 1975-07-02 1977-01-18 Nippon Gakki Seizo Kk Ski
US4270768A (en) * 1977-08-01 1981-06-02 Nippon Gakki Seizo Kabushiki Kaisha Ski and a process for manufacturing same
US4409287A (en) * 1981-06-09 1983-10-11 Harrison Thomas B Ski protective device
US4537417A (en) * 1982-11-02 1985-08-27 Kastle Gesellschaft M.B.H. Ski, particularly a cross country ski
US4953884A (en) * 1987-07-15 1990-09-04 Salomon S.A. Ski having a variable width upper surface
US5141243A (en) * 1990-01-22 1992-08-25 Pacific Coast Composites, Inc. Alpine ski with a simplified construction

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042418A3 (fr) * 1997-03-25 1999-01-14 Boards Unlimited Sportartikel Planche de glisse
US6189912B1 (en) 1997-03-25 2001-02-20 Boards Unlimited Sportarikel Gmbh & Co. Kg Slide board
EP0914845A1 (fr) * 1997-11-06 1999-05-12 Franz Völkl GmbH & Co. Ski und Tennis Sportartikelfabrik KG Ski, planche à neige ou engin de glisse sur neige similaire
EP0937485A2 (fr) * 1998-02-24 1999-08-25 Franz Völkl GmbH & Co. Ski und Tennis Sportartikelfabrik KG Planche à neige, notamment un ski
EP0937485A3 (fr) * 1998-02-24 2002-07-24 Franz Völkl GmbH & Co. Ski und Tennis Sportartikelfabrik KG Planche à neige, notamment un ski
US6357781B1 (en) * 1999-11-05 2002-03-19 Salomon S.A. Gliding or rolling board
US7077418B2 (en) * 2001-07-10 2006-07-18 Fischer Gesellschaft M.B.H. Light-weight construction core and a method for producing the same
AT500159B1 (de) * 2001-10-01 2006-06-15 Atomic Austria Gmbh Schi, sprungschi oder snowboard mit einer strukturierten oberfläche

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