SKI HAVING VARIABLE DAMPING AND MASS

Abstract: The flexibility and damping ratio of a ski have previously not been readily adjustable by the user of the ski. To adjust the elastic and damping characteristics of the ski a hollow section (10) has been formed in the ski that is fillable with a liquid mass selected for the desired properties. The performance of the ski may also be changed by adjusting the camber with the screws (16) and inserts (15) provided along the ski. The ski also includes acute angled edges (12) and ''flex beams'' (8) along the sidewalls of the ski.

Description: SKI HAVING VARIABLE DAMPING AND MASS BACKGROUND OF THE INVENTION 1. Field of the Invention: This invention relates to snow skis and specifically to an improv simpler construction method of said skis that are formed by heat a pressure and incorporates a hollow working section (geometricall stressed) into their design and with the unlimiting design advantages this construction method resulting in a high -performa rtce, easil controlled ski of just under 4' in length. 2. Discussion of Prior Art: Heretofore, in order to control a ski's rigidity and flex pattern alo its length, spring rate, vibration, shock dampening characteristic weight, balance, and the relationships these parameters produce on a ski' performance; the internal components would have to be varied in positio number, size, and composition along the ski's length., height, and widt The preparation of all these components would have to be varied position, number, size, shape, and composition, along the ski's lengt height, and width. The preparation of all these components and t installation of the same into a mold is complicated, difficult and ti consuming. This method of construction is prone to produce inconsiste results from ski to ski because of: human errors, differences consistencies of each of the components, and the cumulative effect of ea inconsistency. In addition, the required application of adhesives used hold the structure together is prone to voids and inconsistent physic properties due to variations in mix ratios, application time, and varyi climatic conditions during application. Because of the mold design and the even clamping pressure required t hold together all the internal components, the top, and bottom surfaces o the ski must be flat. This is a very limiting factor in ski performanc and design. In addition, the molds used to hold and clamp the ski together during cure are expensive and time consuming to build, and the do not lend themselves well to changes in design. Thus, different mold are generally required for different performance models. Once a ski is produced, its performance characteristics related to it dampening, shock absorption, and mass are fixed and not adjustable by th end user. A skier cannot adjust his skis for optimum performance t match his improving ability, style and speed of skiing. Prior to- this present invention, in order to improve a ski's performanc at high-speed racing conditions, the ski would generally have to be mad longer and stiffer. However, in doing so it becomes more difficult t turn and is not well suited for a beginner or intermediate recreationa skier. The present inventor has noted the following patent which discloses an claims a hollow element as part of its construction: patent No. 3861 699 Inventor: Arped A. Molnar Date Issued: 7/30/73. This patent, however appears to be principally directed to providing some type of hollo element in combination with other internal components arranged an constructed similarly to the above hereto mentioned method, and not a typ of ski that is constructed in accordance with the present invention. SUMMARY OF THE INVENTION Skis constructed in accordance with the present invention overcome th disadvantages of the above-mentioned ski construction in the followin ways: In hollow constructed geometrically-stressed snow skis as described i this invention the major loads are mostly carried by the top and botto skin, thus the ski's flexural distribution and spring rate can simply b controlled by varying only the composition, height, and shape of the to and bottom skin of the ski along its length. This eliminates the need fo most internal stiffeners, components and adhesives, and the difficul ies inconsistencies, and complexities associated with them as mentioned above β y eliminating most of these variables, each ski produced using thi process is identical and consistant with each other. The vibration and shock dampening characteristics, weight, balance, an the relationships these parameters produce on a ski's performance ca simply be controlled and varied by filling the hollow section(s) o chamber(s) of the skis with a material. This filler material could be fo example: a liquid, shot, BB's, granuals, etc., and any combinations o filler materials. It has been found that the combination of a viscou liquid and lead shot gives the ski a very smooth and vibration-free rid at high speeds, even in rough and heavy broken snow conditions. The filler materials, due to the nature of this construction method a described in this invention, can be added after assembly through provisional orifice(s) and therefore by the end-user skier. This featur not only allows the end-user skier the flexibility to adjust the ski' performance characteristics to his preference, but allows the manufac turing company the advantage to standardize and reduce the number o models now required to satisfy the present market of skiers. The molds and tooling required to produce these types of skis describe in this present invention are relatively inexpensive, and rapid to produce and relatively easy and inexpensive to change. The top and bottom of these skis can be molded separately by vacuum drape, pressure, etc. and clamped and bonded only along the perimeter This is a much faster, simpler, cheaper and more consistent process Thus, the bottom can be contoured and shaped as desired and not have to b flat as with prior skis built as of the date of this invention. It ha been -found that a' varying-molded concave bottom, combined wi h bevele edges made possible by this construction method gives the ski superio tracking, carving, and holding abilities much beyond that of the prio flat-bottom snow skis. One of the most outstanding advantages of my invention has been th capability to produce, for the first time, a high-performance short ski o just under four feet long, that is much easier to control than any longe ski of the prior art. The performance at high-speed racing conditions ha proven to be equal or better than most long, stiff racing skis of th prior art. The resultant short ski, made possible by this presen invention uses a viscous liquid and lead shot in the hollow front half o the ski, combined with a molded concave bottom with beveled edges. Th liquid and lead shot gives the ski a smooth, vibration-free shock-absorbing quality only found on prior-art long, heavy racing skis. The molded concave bottom gives the ski the holding, carving and tracking ability only found on prior-art long racing skis. Further objects and advantages of my invention will become apparent from a consideration of the drawings and ensuing description thereof. DESCRIPTION CF THE DRAWINGS FIG. 1 is a top view of a ski, embodying the present invention; FIG. 2 is a side elevation view of FIG. 1; FIG. 3 is a cross-sectional view of FIG. I and FIG. 2 at the toe area of the ski, indicated by section lines 2-2; FIG. 4 is a cross-sectional view of FIG. 1 and FIG. 2 just before the binding area, as indicated by section lines 3-3; FIG. 5 is a cross-sectional view of FIG. 1 and FIG. 2 at the binding area, as indicated by section lines 4-4; FIG. 6 i s an exploded view of the steel ski edge as indicated by the area marker of FIG. 4; FIG. 7 is an improved embodiment of fig. 6, referred to as a "super carver edge"; and FIG. 8 is an exploded view of the adjustable contoured bottom, as indicated by the area marker of FIG. 5. GENERAL DESCRIPTION OF THE PREFERRED EMBODIMENTS The design and manufacturing methodology is as follows: Referring to FIGS. 1 thru 5, the top skin 6 and bottom skin 10 can be simply formed by heat and maybe pressure, such as thermal forming, drape, matched molds, foam injected, stamped, etc. The top and bottom skin of this embodiment carries most of the stress, and therefore must be constructed of a strong, flexible material such as high-strength sheet molding compound (SMC), polycarbonate, or other high-strength mo ' ldable material. The top and bottom skin are bonded together along the entire ski's perimeter 18 .sing high-strength adhesives suitable for the material composition of the top and bottom skin. Or, instead of adhesives, they can be welded or laminated together by heat and pressure. This construction method results in the formation of a hollow section 14. The flexural distribution or stiffness of the ski along its longitudinal axis is primarily controlled by the height and shape of the top skin 6 (geometrically stressed). For example: the higher the top skin is, the stiffer the ski becomes, and the lower the top skin is, the softer the ski will be. Referring to FIGS. 4 and 5, the flexural distribution or stiffness of the ski in the area of the ski binding shown in this embodiment, is con¬ trolled by the height, cross sectional area and composition of the "flex oeams 1' 8 located along the sidewalls of the ski. The material shown here is high-strength spring steel or graphite composite. The flexural distri¬ bution or stiffness of this area could also be controlled geometrically by the top skin, as described above; however, the inventor prefers the flex beams in this area so as to enable the ski bindings to be as low to the snow as possible for better edge control . The flex beams are supported in the vertical position by means of a solid core 7. The vertical position of the flex beams allow the maximum stiffness wi h the least amount of material . The solid core also provides a s Irony, thick section to hold the ski binding screws. GENERAL OPERATION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 3 and 4, the operation or performance of skis made with a hollow front section 14 can be changed and improved beyond skis of the prior art by filling this hollow cavity with a material that will add /eight to the tip and also absorb vibrations that normally occur when skis are travelling fast on hard and/or bumpy snow. This void area could be filled with a non-solid, such as granules, or a fluid such as a glycol , oil , mercury, etc. or other such liquids that will remain in a liquid state at all ski condition temperatures. The liquid adds weight to the tip and thus helps the ski break through and ride the bumpy snow by absorbing some of the impact and vibration that would otherwise be transmitted back to the skier's feet and legs. This liquid mass dampening feature can be further enhanced by the addition of shot, such as nickel - plated lead BB ' s , to the fluid media. The addition of the shot, or this added weight, further increases the kinetic energy of the ski's tips, and thus makes the skis ride even smoother at higher and higher speeds. Tne shot also absorbs vibration, by the vibration energy being transmitted to the shot and then dissipated through absorption into the dampeni liquid. The amount of fluid and/or weight can be adjusted by a fill hole sho in FIG. 1-19. Referring to FIGS. 3, 4, and 5, the operation or performance of the ski made within the scope of this invention can be changed and improved beyo skis of the prior art in ad'dition to the above-described method molding or varying the shape of the bottom skin (ski base) 10 along t ski's length, for example; from a convex shape shown in FIG. 3-10, moderately concave at FIG. 4-10, to deeply concave at FIG. 5-10. This i referred to as a contoured bottom. A convex bottom FIG. 3-10 at the front of the ski keeps the edg slightly off the snow so they won't catch or hook, possibly causing skier to fall. A convex front also makes the skis easier to turn. Ski of the prior art are usually dulled or beveled at the tips and tails reverse camber to prevent them from hooking and/or make them easier turn. This practice can sacrifice performance at higher-speed carvin turns, especially on hard snow conditions. A concave bottom under the skier's foot and slightly behind- his rea binding gives the skis a greater tracking ability and more edge bite th conventional flat skis. Referring to FIG. 5 and the exploded view F1&9, the degree of concav may be adjusted (adjustable bottom contour) by a series of screws 16 wi inserts 15 and pressure pads 17 set at distances approximately 2" apar along the center longitudinal axis of the ski. This is an optiona feature that would allow a skier to tune the performance of the ski t suit his style and abil ty or specific need. With the hollow constructed snow skis as described in this invention the contour of the bottom can also be adjusted by pressurizing o evacuating the front section through a valve inserted at the opening FIG 1-19. The rear portion of the ski could be adjusted similarly an separately by sealing the front section from the rear section an providing an additional valve in the rear section. The exceptionally deep concave that this construction method make possible requires the edges to be beveled as shown in FIG. 6-12 in orde to facilitate the initiation of the turn. It has been discovered by th use of this invention that the deeper the concave, the greater the angl of the bevel should be. However, when the bevel required to initiate the turn easily on a very deep concave bottom exceeds 5°, the edge becomes too dull and will lose most of its bite on icy snow: FIG. 7 shows an improved edge which does not have to be beveled as described above, but rather, the sharply-pointed edge 13 is supported above the snow a varying distance determined by the depth of the concave, the width of the ski, and the location along the ski's longitudinal axis. This edge will greatly increase the grip on ice of all skis, including those of the prior art; however, this said edge allows skis of thii embodiment a deeper concave, and thus, greater tracking and grip without sacrificing a sharp edge or ease of turning. SPECIFIC DESCRIPTION AND OPERATION OF THE PREFERRED EMBODIMENTS This invention makes possible for the first time a super high performance short ski of just under four feet long, as shown in FIGS. 1 and 2. This ski is approximately four inches wide at the front of the running surface 23 and a little ov.er three inches wide at the waist 20 and just under four inches wide at the rear of the running surface 24. The side cut of the ski is a constant radius, intersecting at points 23, 20, and 24. At the tip and tail, the skis are about one inch wider tnan conventional long skis. This extra width gives the skis more speed and floatation in soft snow similar to a much longer conventional ski. The extra width also allows a much deeper sidecut of constant raαi-us, thus giving the ski the ability to carve which matches or exceeds that of longer conventional skis. This ski has camber the distance equal to or greater than that of conventional long skis, as shown in FIG. 2-21. This camber adds stability in straight-line tracking and combined with the side cut, a more even pressure distribution along the edge when the skis are on. edge in a turn. This comb'.nation also gives the skis rebound or spring going o an . of each turn (liveliness!. Thus, the skis accelerate quicker out of oacn turn as well as absorb bumps Ti e springs. The 3'•1 of this ski 25 is turned αp the same ra ium as the tip. \ > ■ ■• : inhibits ine skis f rom slowing down or 'jigging π ic'lo the s 'e-- jl Λ T. his weight to shift rearward. This also permits the skier to s backwards, as in ballet skiing. The performance of this ski meets or exceeds most conventional long skis of the prior art in high-speed stability, vibration dampenin carvability, ease and quickness of turning, high-speed tracking, holding ability on icy snow. The explanation of these performance clai are as follows: In conventional or prior-art designed snow skis, the length, weight a stiffness are generally increased to stabilize and dampen vibrations on high-speed racing ski. With this invention, the addition of liquid and/ wight to the front section has a simulated effect of adding length related to- the stability of the ski at high speed. Thus, a ski using th invention can be made much shorter in the front than a traditional conve tional ski without sacrificing high-speed stability. In conventional skis, the high-speed tracking and carving ability improved by making the skis longer. A long tail on conventional sk gives the skis straight-line stability because of the increased resistan of the snow along both sides of the ski's edges. This resistance hel the skis to track, but also greatly increases the difficulty and for required to turn them. With this invention, the super-deep concave bott 1/16" or greater at the weight-bearing section of the ski as shown in FI 4-9 simulates the tracking, carving, and holding abil ty of long skis wi long tails. Thus a ski using this invention can be made much shorter the rear than a traditional conventional ski without sacrificing carvi ability, tracking, or holding power on icy snow. Some of the advantages of high-performance short skis of this abov described embodiment over the conventional long skis of the prior art a as follows: Easier to turn, gives a skier more control in almost all sn conditions and terrain; easier, faster and safer to learn; less effor more versatile and convenient; plus other apparent advantages. While the above descr ptions of this entire invention contains ma specificities, these should not be construed as limitations on the sco of the invention, but rather as an exemplification of one preferr embodiment therof. Many other variations are possible. For exampl these same features could be incorporated in snow skis of a longer conve tional length and/or having a geometrically-stressed tail and/or a liqu mass dampening and/or a varying contoured bottom, etc. Accordingly, t scope of the invention should be determined not by the embodiment illustrated, but by the appended claims and their legal equivalents.

Claims: I Claim: 1. Hollow constructed snow skis comprising: a construction method that provides the means to create a hollow section contained therein, whereby said hollow section provides a means to contain a quantitative variable mass. 5 2. Snow skis as set forth in claim 1 wherein: The top skin of said skis are geometrically stressed, providing a means to control the flexural modulus along the ski's length. 3. Snow skis as set forth in claim 2 wherein: said geometrically- stressed skis are combined with an internal stiffening means characterized 10 by a high-flexing modulus. 4. Snow skis as set forth in claim 1 wherein said hollow section is filled to a varying degree with a free-flowing mass characterized by a liquid, small particles of matter, or a combination thereof, the means of which provides the ability to change the weight and vibration dampening 15 characteristics of said skis. 5. Contoured bottom constructed snow skis comprising: a construction method that provides the easn to create a varying bottom contour along the ski's logitudinal axis, whereby said ski bottom is characterized by a relatively deep concave at the ski binding area 20 tapering to a moderate concave, flat, or convex contour at the front portion of the ski's bottom. 6. Snow skis as set forth in claim 5 wherein said bottom contour can be adjusted along the ski's logitudinal axis after the skis are manufactured. 7. A pair of snow skis with super carver edges along both sides of each *) c ski comprising a sharply-pointed edge whereby outside sharp point of said edge is supported by means above the snow surface a distance determined by. the width, shape of the skis and/or location al onq the ski's longitudinal axis.

Inventors: FLOREANI ADRIAN J, FLOREANI, ADRIAN, J.
Applicants: FLOREANI ADRIAN J, FLOREANI, ADRIAN, J.
Application year: 1986
Main classification: A63C5
IPC codes: A63C5