Land vehicles – Skates – With propulsion means driven by occupant
Patent
1980-11-08
1982-12-14
Peters, Jr., Joseph F.
Land vehicles
Skates
With propulsion means driven by occupant
280 1123, 280 1125, 280 8704R, A63C 1726, A63C 500
Patent
active
043634923
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to roller skis for training long distance skiers and of the type incorporating a foot plate with binding means adapted to retain the users' ski shoe in such a manner that its heel portion is freely pivotable about the firmly fixed toe portion. The foot plate is supported by a front and a rear wheel, whereby supporting members are arranged to extend upwards from the foot plate in order to form side supports for the users' lower leg.
DESCRIPTION OF THE PRIOR ART
Roller skis are well-known aids for training in long distance skiing when snow is not available.
These prior roller skis are designed in such a manner that they can only be used on a very smooth and even surface, preferably asphalted roads. It is of course inconvenient and unsafe for training and excersing of skiers to take place on roads close to the road traffic, and at dusk or in darkness. When great risks of accidents occur, and furthermore, these areas are not healthy environments for the roller skier, who must breathe the exhaust-mingled ambient air.
One of the reasons that the use of conventional roller skis is delimited to asphalted roads and the like is that in order to provide sufficient side-stability they are equipped with small, broad wheels, in order not to expose the skiers' ankles to very large lateral bending stresses. This design means that the roller ski will behave essentially as an ordinary ski which has rather small tendencies of wobbling laterally.
In order to imitate down-hill skiing there have also been produced special roller skis having larger wheels, but these roller skis have been provided with binding means which keep the ski boot in a fixed position, and it has also been necessary to use stiff down-hill race boots in order to obtain a sufficient stability in order to have strength enough to balance the tendencies of side tilting. It has been possible to use this type of roller ski in the terrain due to its large wheels, but due to the firm arresting of the ski boot its use has been limited to slope running, or for long distance skiing with poles only and without use of the legs.
BRIEF SUMMARY OF THE INVENTION
The purpose of the present invention is to provide a roller ski for cross-country-skiing and training or excercising therefore, the use of which is not delimited to even and smooth surfaces. This object is obtained by providing the roller ski according to the invention with supporting members formed by rigid side members extending one on each side of the foot plate in arc-form upwards from the foot plate between its forward and rear portions which function, during the pivoting of the heel portion around the binding means as lateral supports, at a level just above the ski shoe along the entire motion path of the lower leg, without thereby holding or hampering the leg in its motion in the longitudinal direction of the roller ski.
By means of this design with support for the angles, which increases the user's ability to compensate for the tendencies of canting of the roller ski, it is possible, according to another feature of the invention, to provide the roller ski with pneumatic rubber wheels, which can be used e.g. on forest paths, on prepared electric-light-illuminated snow-free tracks, etc.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will hereinafter be further described with reference to an embodiment illustrated in the accompanying drawing wherein,
FIG. 1 shows in a schematic side view a skier using roller skis according to the invention,
FIG. 2 is a side elevational view in larger scale of a roller ski according to the invention, and
FIG. 3 is a top plan view of the roller ski according to FIG. 2.
DETAILED DESCRIPTION
In FIG. 1 is shown a side view of a roller skier 1, using roller skis 2 in accordance with the present invention. As can be seen in the position of the rearmost foot of the skier only the toe portion 3 of the ski shoe is held by the binding at 4 whereas the heel portion 5 is pivotable about the firmly held toe portion. The bind
REFERENCES:
patent: 3767220 (1973-11-01), Peterson
Peters Jr. Joseph F.
Rice Kenneth R.
LandOfFree
Roller ski for training long distance skiing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Roller ski for training long distance skiing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Roller ski for training long distance skiing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1198947