Land vehicles – Skates – Ski simulators
Patent
1988-01-19
1989-06-06
Marmor, Charles A.
Land vehicles
Skates
Ski simulators
188 2R, 188 717, 188 80, 280 112, 280 1122, 280 87041, A63C 1704
Patent
active
048365670
DESCRIPTION:
BRIEF SUMMARY
The invention concerns roller skis, each of which has a longitudinal support equipped with a binding for a ski boot, on which support, front and back, rubber-tired running wheels are situated, one or more of which are provided with a return catch.
Such roller skis are known in the art as a summer training device for cross-country skiers. In this instance, the rubber-tired running wheels have a relatively small diameter and are, accordingly, only appropriate for level, solid terrain, for example, for paved streets. In order to also be able to use such roller skis on surfaces other than paved roads, for example, on paths in the woods, the use of running wheels with a larger diameter is also known in the art. Roller skis outfitted in this manner are, by the very principle of their design, excellently suited for fitness training because, in contrast to downhill skiing, skiers' joints are subjected to less impact stress and, because of the movement of the arms with ski poles, the entire body is more involved in the fitness training exercise.
A particular problem encountered in using such roller skis is the ability to brake the roller skis on a downhill surface. The patent literature is replete with numerous proposals for braking devices which act upon the wheels, which devices are released with a ski pole, via a rope, by hand, with the skier's heel or calf. All these braking devices, however, are too complicated in design and construction and impede natural the skier's natural motional sequence, with the result that such roller skis have hardly found acceptance.
DE-OS No. 28 23 152 proposes a configuration whereby the support tilts about an axle running in the direction of movement and brake shoes that act upon the running wheels. This configuration is intended to make it possible to achieve a braking effect through tilting of the roller ski, that is, through a movement practiced even in normal skiing. This braking device, however, has the drawback that it produces undesired and unexpected braking action for the skier when he is on uneven terrain, when the terrain runs at a diagonal incline to the direction of travel, or correspondingly uneven surface conditions are present. Such undesired and, for the skier, unpredictable braking action can lead to unpleasant falls.
The task, therefore, of the invention is to further develop the roller skis of the kind described at the outset in such a way that they can be braked, as desired and without the use of a complicated braking device, through a movement known to the skier on downhill terrain.
In solving this task, the invention, taking the roller skis of the kind described at the outset as its point of departure, proposes equipping, in particular, the rear running wheels located on the side facing the adjacent roller ski with a brake lining laterally mounted on the running wheel, which brake lining projects slightly inwardly beyond the inner lateral boundary of the longitudinal support which extends in the direction of movement. The invention further proposes providing these lateral boundaries of the longitudinal supports with counterbrake surfaces which extend, essentially, in a direction parallel to the brake linings on the running wheels.
The brake linings on the running wheels and the counterbrake surfaces on the longitudinal supports enable the skier to execute a precisely regulated braking maneuver by causing the insides of the roller skis, when slightly offset in the direction of movement, to be pressed against each other. All that is required to achieve this effect is, somewhat similarly to downhill skiing with normal skis, with the skis being offset a little less than a foot's length, to press the roller skis against each other, the knees being held tightly together. An especially powerful braking effect results, if need be, if the skis are offset, in the direction of movement during the braking process, by a little less than the diameter of the running wheels. In this case, the brake linings which are moved in opposite directions, slide with friction on the
REFERENCES:
patent: 1845345 (1932-02-01), Sauzedde
patent: 2892514 (1959-06-01), Gaines et al.
patent: 3767220 (1973-10-01), Peterson
patent: 3790187 (1974-02-01), Radu et al.
patent: 3876217 (1975-01-01), Copier
patent: 3884486 (1975-05-01), Wilje
patent: 4273345 (1981-06-01), Ben-Dor et al.
patent: 4460187 (1984-07-01), Shimizu
Culbreth Eric
Marmor Charles A.
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