Land vehicles – Skates – Runner type
Patent
1985-01-30
1987-03-24
Pekar, John A.
Land vehicles
Skates
Runner type
280609, 280610, A63C 708, A63C 504
Patent
active
046520066
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to devices for travelling over virgin or packed snow, either uphill, or downhill, or on the flat, as well as for traversing.
The devices used at the present time are of several kinds: snowshoes allow step by step walking, avoiding any sliding, but limit the travel to slopes of less than 18.degree.; apprenticeship is easy, but use thereof is relatively fastidious and their possibilities limited--long distance skis, a ski narrow and long having a width less than 5 cm and a length of about 1.8 m, can be used on the flat or on limited uphill and downhill slopes; the long distance ski is difficult to use on non packed snow, for which it requires a long and fastidious apprenticeship--downhill skis are relatively wider and shorter, having a width of about 7 cm and a length of about 1.8 m for the long skis and about 1.5 m for the compact skis, are adapted only for downhill runs. They require a long and fastidious apprenticeship, sophisticated equipment such as special shoes, and relatively sporting abilities on the part of the user. They can be used for going uphill by fitting a removable antislip skin under the sole of the ski. Uphill use is limited to slopes less than about 25.degree..
It can be seen that each of the known devices is precisely adapted for a particular use, downhill, on the flat or uphill running. All these devices have limits of use which prevent use thereof by the largest number of users without particular physical ability.
Recently, attempts have been made to make downhill skis accessible to the largest number, by reducing their length and increasing their width, thus providing compact skis having a length of about 1.5 m and a width of 8 to 9 cm, which are easier to use. However it has been discovered that, after the first craze, users gradually chose longer skis more adapted to use on a tamped ski run.
SUMMARY OF THE INVENTION
The object of the present invention is in particular to overcome the disadvantages of known devices by proposing a new type of short and wide ski, having a particular profile and usable practically without apprenticeship on the flat, uphill, downhill or for traversing. The object of the invention is not to allow the performances of known equipment, for each one in its field of application, but offers a satisfactory synthesis for travelling over any snow; uphill, downhill and across slopes up to 45.degree.; slided steps on the flat like the long distance ski; the particular profile of the ski further providing without wax or retainer plate uphill advance without slipping on slopes going up to 20.degree.; downhill travel on any kind of snow by sliding like the downhill ski.
Particular arrangements ensure the stability of the ski of the present invention despite its short length, and increases its lift on unpacked snow; furthermore, they ensure a nonslip function for uphill travel which allows skis to be used without a retainer plate on slopes up to about 20.degree., the rear of the ski tending to dig into the snow. They also allow breaking on downhill runs, without retainer plate by rearward tilting of the body of the user.
To attain these objects as well as others, the present invention plans to provide a ski whose width is substantially twice that of a downhill or excursion ski, that is to say a width between 12 and 15 cm; furthermore, the length of the ski must be between 5 and 7 times its width. These proportions are very different from those used for conventional skis. The ski thus constructed, of a length of about 80 cm is considerably shorter than all the skis proposed up to the present time, which is contrary to the present development of lengthening skis and progressively abandoning compact skis.
In a way known per se, the ski according to the present invention comprises a front spatula, a bearing zone and bindings. The bearing zone is cambered so as to form a lower concave surface. According to another feature of the invention, the lower surface of the bearing zone comprises a substantially flat front
REFERENCES:
patent: 3628804 (1971-12-01), Carreiro
patent: 3655211 (1972-04-01), Bollettieri et al.
patent: 3724866 (1973-04-01), Kaplan
patent: 3854739 (1974-12-01), Toda et al.
patent: 3861698 (1975-01-01), Greig
patent: 4065150 (1977-11-01), Van Auken
patent: 4288092 (1981-09-01), Mukri
Culbreth Eric D.
Pekar John A.
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