Land vehicles – Skates – Runner type
Patent
1980-09-09
1982-11-30
Spar, Robert J.
Land vehicles
Skates
Runner type
188 6, A63C 710
Patent
active
043613438
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a ski brake having at least one brake arm, a foot element and a spring-loaded articulated lever system arranged between the brake arm and the foot element.
As a state of technique there has been known before a ski brake which is constructed in such a way that the brake arm consists of two sides connected with each other. One side is placed stationary in the housing while the other side is connected with a foot lever. A type of four-bar linkage results as an articulated lever system.
This well-known ski brake has first of all the disadvantage that the brake arm extends in the skiing direction so that an undesirable braking action and thereby injuries to the skier can occur. Moreover, a considerable stepping force is required in order to bring the ski brake out of the operating position into the position of rest.
Compared to that, the problem of the present invention consists of developing a ski brake of the aforementioned type in such a way that with little step-in distance and little force the brake arm brings about the braking of the loose ski very effectively.
As defined in the invention this problem is solved by the fact that the articulated lever system is designed as a sliding crank - with the crank being connected with a brake arm, the coupler forming the foot element and a sliding element being arranged spring-loaded in the longitudinal direction of the ski in a housing. Hereby the advantage results that because of the design of the ski brake as a sliding crank only little step-in distance is required - however, with the brake arm being swung out to a high degree and thus bringing about optimal braking.
According to another characteristic of the invention, the crank joint is arranged stationary in the housing with the joint between the foot element and the sliding element being movable in the longitudinal direction of the ski parallel to the surface of the ski. In a further development of the invention, the two joints can be arranged at different levels relative to the surface of the ski. The joint of the crank then can be located closer to the surface of the ski than the joint between the foot element and the sliding element. There results an improvement of the geometrical dimensions of the sliding crank which is present in this case as an eccentric sliding crank.
In a further development of the invention, two brake arms are connected with each other by way of a U-shaped intermediate zone - with the connecting side of the U-shaped intermediate zone being placed in the foot element and forming the joint between the crank and the foot element and with the longer side of each sliding element being spring-loaded and placed in the housing and the shorter side of each sliding element forming the joint between the foot element and the sliding element. Hereby a simple constructed form of the ski brake designed as a sliding crank results.
According to another characteristic of the invention, the two longer sides of the sliding element are placed in upright bars of the housing and each have a flange at the end - with the springs being designed as cylindrical thrust springs and placed each between the flange and a housing wall. The springs can be placed here encapsulated in the housing so that faultless protection of these springs and thereby long life is guaranteed.
In a further development of the invention, the foot element can consist of two foot bars located parallel--with each foot bar being connected, on the one hand, with the connection side of the U-shaped intermediate zone and, on the other hand, with the short side of each angular part of the sliding element.
On the other hand, however, it is also possible to design the foot element as a foot plate provided with a center opening and to connect it, on the one hand, with the connecting side of the U-shaped intermediate zone and, on the other hand, with the short side of each angular part of the sliding element. By means of this foot plate, the contact pressure brought about by the heel of the boot is advantageously transferred
REFERENCES:
patent: 3933361 (1976-01-01), Beyl
patent: 4063751 (1977-12-01), Salomon
patent: 4103916 (1978-08-01), Krob et al.
patent: 4234206 (1980-11-01), Hofbauer et al.
Firma ESS GmbH & Co.
Spar Robert J.
Underwood Donald W.
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