US3734519A - Molded ski - Google Patents

Molded ski Download PDF

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Publication number
US3734519A
US3734519A US00083345A US3734519DA US3734519A US 3734519 A US3734519 A US 3734519A US 00083345 A US00083345 A US 00083345A US 3734519D A US3734519D A US 3734519DA US 3734519 A US3734519 A US 3734519A
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Prior art keywords
ski
recesses
molded
cored
skis
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Expired - Lifetime
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US00083345A
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English (en)
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W Bennett
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Individual
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Individual
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    • 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
    • A63C5/12—Making thereof; Selection of particular materials

Definitions

  • Fiber-glass skis have been made of many materials. The modernday tendency is towards fiber-glass. Fiber-glass skis have been made utilizing a core, usually of wood, but sometimes of metal or plastic, with laminations at the top and bottom surfaces. Certain fiber-glass skis have been made using channels of fiber-glass in which the channels extend for specified distances along the ski, these channels then being covered by fiber-glass sheets. Other fiber-glass skis have been provided with reenforced center cores and as for instance fiber-glass and epoxy envelopes or envelopes with polyethylene bases.
  • skis In addition to resisting proper design of the different zones of the ski from end to end thereof, they are also expensive and difficult to standardize as to ski form and shape, it being recognized that skis should be flexible as to design for different types of skis, the weight should be able to be controlled, and the strength of the skis at various zones from end to end should also be easily controlled. In addition, prior art custom built skis for racing, have not been feasible without excessive cost.
  • a ski is molded in one shot in a die and is then provided with top and bottom surfaces and steel edges.
  • the dies are provided with core pins which extend generally from either top or bottom of the ski or from one surface only thereof, and the core pins are provided in such a way as to make them easily replaceable for the use of larger or smaller core pins, depending upon the amount of material which it is desired to be incorporated in the ski in a particular zone.
  • the cores are variable as to spacing for the purpose of proper and varied design of different zones such as the tip, shovel, fulcrum point, running surface, mounting zone, heel, etc., and this is done merely by changing the cores in the die.
  • FIG. 1 is an edge view of a so-called Alpine ski
  • FIG. 2 is a perspective view, parts being in section, and parts broken away to show an example of the novel ski with hexagonal recesses;
  • FIG. 3 is a longitudinal section through a portion of a novel ski having cored recesses extending from both top and bottom thereof;
  • FIG. 4 is a sectional view of a ski illustrating cored recesses located at one side only of the ski;
  • FIG. 5 is an exploded view of one form of die and the resultant ski
  • FIG. 6 is a composite plan view illustrating variation of core design.
  • FIG. 1 showing an Alpine ski.
  • the ski tip is indicated at 10; the shovel at 12; the apparent fulcrum point at 14; common fracture zone 16; the heel is shown at 18, and the running surface under load extends from the point at 20 to the point at 22.
  • the mounting zone or load position is indicated at 24; 26 indicates what is commonly referred to as the forward section; 28 indicates the approximate balance point;
  • the present ski is formed in a mold extending from end to end of the ski, this core being indicated generally by the reference numeral 36.
  • this core being indicated generally by the reference numeral 36.
  • the cored recesses 38 which extend to the top of the ski and similar or different cored recesses 40 extending to the bottom of the ski in alternate juxtaposition, leaving solid walls between the recesses.
  • a running surface is shown at 42 and this may be made conveniently of appropriate plastic material, and steel edges 44 are provided as well as the top surface skin generally indicated at 46.
  • the running surface and the top skin are applied after molding the main body portion 36, but the steel edges are preferably placed in the mold and molded into the body.
  • FIG.-3 shows a section of the ski of FIG. 2
  • FIG. 4 shows a similar ski in which the cored recesses all extend from only one surface, e.g., the top of the ski, the cored holes being shown at 48, in which case the bottom of the ski has a continuous surface 50 as well as the applied running surface 52, and top skin 54.
  • the recess may also extend from only the bottom surface, and any variation desired may be arranged.
  • FIG. 5 there is shown an exploded view with the ski of FIG. 2 formed by a mold having upper and lower part as indicated at 60 and 62 respectively, the parts of the ski are indicated as before.
  • mold parts may be made in any way desired or convenient to the correct shape of the ski but it is to be noted that the cores themselves which are indicated at 64 in the top mold part 60, and at 66 in the bottom moldpart 62 are held in place by fasteners generally indicated at 68 and they can be removed and replaced by cores of different sizes or shapes. Also there may be provision for more fasteners and cores than are here shown and any cores may be omitted in such patterns as may be desired in order to suit different conditions and different zones of the ski itself. Also, FIG. 6 illustrates that the size, shapes, and spacing of the cores may be varied to any degree desired according to the design of the particular ski involved.
  • the core variation is provided for desired flex, torsion, weight and balance, as to variant wall thicknesses and density increasing or decreasing exposed surface area for top and base bonding and if desired the steel edges can be molded right into the body form and positively located by the top and the base mold.
  • any ski may be cored on one surface only depending upon the section or the zone of the ski as explained in FIG. '1. For instance, it has been found that it is better to core on the top surface only for the section of the ski as explained in FIG. 1. For instance, it has been found that it is better to core on the top surface only for the section of the ski from the tip at 10 as far as the fracture area 16, as this area is subject to railing or excessive wear of the plastic running surface next to the edges.
  • this invention is totally different in principal from that of the well known honeycomb sandwich made of any so-called core" material, i.e., paper, foil, fiberglass, etc., which cannot hold its shape under tension or compression and is limited in its mechanical properties to the materials used for securing the parts together.
  • core i.e., paper, foil, fiberglass, etc.
  • the present novel structure is a molded form without the need for top or bottom surfaces.
  • ski refers to any similar device for gliding relative to a supporting medium

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  • Laminated Bodies (AREA)
US00083345A 1970-10-23 1970-10-23 Molded ski Expired - Lifetime US3734519A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8334570A 1970-10-23 1970-10-23

Publications (1)

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US3734519A true US3734519A (en) 1973-05-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00083345A Expired - Lifetime US3734519A (en) 1970-10-23 1970-10-23 Molded ski

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US (1) US3734519A (Direct)
DE (1) DE2151944A1 (Direct)
FR (1) FR2113163A5 (Direct)
IT (1) IT939617B (Direct)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4903967A (en) * 1989-01-27 1990-02-27 Ferrari Importing Company, Inc. Racket frame having holes for tailoring frame stiffness
US5171509A (en) * 1990-02-15 1992-12-15 Salomon S. A. Process for assembling a ski by duplicate molding and ski obtained by use of this process
US6073956A (en) * 1997-06-04 2000-06-13 Sims Sports, Inc. Snowboard with honeycomb at tip and tail
US20030121596A1 (en) * 1996-01-31 2003-07-03 Richard Greven Method of making complex shaped articles
US20040005825A1 (en) * 2001-01-10 2004-01-08 Hasted Ronald Francis Board-like sportscraft
US20130140795A1 (en) * 2011-12-05 2013-06-06 Skis Rossignol Snow gliding board structure element, and gliding board incorporating such an element
US11980806B2 (en) * 2022-04-05 2024-05-14 Peak Ski Company, LLC Skis with reinforcement layer cutout

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT386959B (de) * 1985-02-07 1988-11-10 Isosport Verbundbauteile Verfahren zur herstellung eines bauteils fuer einen skikern, mit diesem verfahren hergestellter bauteil sowie ski mit einem solchen bauteil
AT390196B (de) * 1985-10-28 1990-03-26 Fischer Gmbh Verfahren zur herstellung eines ski nach und vorrichtung zur durchfuehrung dieses verfahrens
US7077418B2 (en) 2001-07-10 2006-07-18 Fischer Gesellschaft M.B.H. Light-weight construction core and a method for producing the same
AT410517B (de) * 2001-07-10 2003-05-26 Fischer Gmbh Leichtbaukern und verfahren zur herstellung desselben

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581532A (en) * 1946-08-23 1952-01-08 Arne G Hem Ski
FR1453516A (fr) * 1965-08-13 1966-06-03 Ski alvéolé
FR2005056A1 (Direct) * 1968-03-29 1969-12-05 Bader Albert

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581532A (en) * 1946-08-23 1952-01-08 Arne G Hem Ski
FR1453516A (fr) * 1965-08-13 1966-06-03 Ski alvéolé
FR2005056A1 (Direct) * 1968-03-29 1969-12-05 Bader Albert

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4903967A (en) * 1989-01-27 1990-02-27 Ferrari Importing Company, Inc. Racket frame having holes for tailoring frame stiffness
US5171509A (en) * 1990-02-15 1992-12-15 Salomon S. A. Process for assembling a ski by duplicate molding and ski obtained by use of this process
US20030121596A1 (en) * 1996-01-31 2003-07-03 Richard Greven Method of making complex shaped articles
US6790402B2 (en) 1996-01-31 2004-09-14 Richard Greven Method of making complex shaped articles
US20040251577A1 (en) * 1996-01-31 2004-12-16 Richard Greven Complex shaped articles and method of manufacture
US6073956A (en) * 1997-06-04 2000-06-13 Sims Sports, Inc. Snowboard with honeycomb at tip and tail
US20040005825A1 (en) * 2001-01-10 2004-01-08 Hasted Ronald Francis Board-like sportscraft
US20130140795A1 (en) * 2011-12-05 2013-06-06 Skis Rossignol Snow gliding board structure element, and gliding board incorporating such an element
US8827301B2 (en) * 2011-12-05 2014-09-09 Skis Rossignol Snow gliding board structure element, and gliding board incorporating such an element
US11980806B2 (en) * 2022-04-05 2024-05-14 Peak Ski Company, LLC Skis with reinforcement layer cutout

Also Published As

Publication number Publication date
IT939617B (it) 1973-02-10
FR2113163A5 (Direct) 1972-06-23
DE2151944A1 (de) 1972-04-27

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