Land vehicles – Convertible – Wheel to or from runner
Patent
1987-11-30
1989-05-02
Mitchell, David M.
Land vehicles
Convertible
Wheel to or from runner
280 1112, 280 1118, 280 1122, 280 113, 36 87, 36115, A63C 1718
Patent
active
048261831
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION(S)
This United States application stems from PCT International Application No. PCT/NO87/00019 filed Mar. 11, 1987.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a skate comprising a shoe portion, a ground touching device and a transition portion which connects the shoe portion to the ground touching device, the shoe portion and the transition portion being formed in one piece.
2. Description of the Prior Art
Within many field of atlethics and sports the advantages of new materials, such as different types of foam plastic with different properties, glass or carbon fiber reinforced plastic, etc., have been realized in the production of athletic and sports equipment. In addition to providing lighter and stronger equipment, such materials have made possible equipment having designs and qualities which were earlier unattainable.
However, as to skates, newer materials have been adopted only to a small extent despite the fact that there could be reason to assume that low equipment weight for example could contribute to improved records in speed-skating and permit faster movements during ice-hockey and bandy playing and figure skating.
It is known that skates for figure skating, bandy, ice-hockey and speed skating as well as roller skates for use by skaters during training may have a leather shoe connected to a metal base part. This base part may comprise one or more metal plates contacting the sole of the shoe and riveted thereto. To the metal plates there may be fastened by brazing, spot welding or the like, metal sections extending downwards, and the lower end portion thereof may in a a similar way be connected to a metal section extending generally parallel to the sole, to which section is fastened a further metal section or runner adapted to glide on ice, or a number of wheel axles with wheels.
This design has existed unchanged for a very long time in spite of changes proposed for example known skates for speed skating seem to be too heavy, render little support to the foot and offer large air resistance.
Further, there exist ice-hockey skates where the shoe portion is made of solid, cast plastic and where a conventional metal base part is cast into the sole portion. Skates of this type are not lighter than previously known skates, but they probably offer better protection of the feet of the players against blows and kicks to the feet during games.
BRIEF SUMMARY OF THE INVENTION
The purpose of the invention is to provide a skate which is not burdened with the above-mentioned disadvantages.
This is accomplished by the skate according to the invention having a shoe portion, a ground touching device and a transition portion which connects the ground touching device to the shoe portion. The shoe portion and the transition portion are made in one piece and form a shell of a sandwich construction with a core made of foam plastic and outer layers made of plastic reinforced with glass or carbon fibers. The ground touching device may be a metal section fastened by glue in a downwards opening groove formed in the transition portion and adapted to glide on ice, or rollers arranged in the groove and adapted to rotate about respective shafts fastened to the transition portion. There is thus provided a very light skate which renders good support to the foot and has little resistance.
The invention will now be explained in detail in the following description with reference to the accompanying drawings, which show embodiments of a skate according to the invention, and wherein:
FIG. 1 is a side elevational view of a skate for speed skating according to the invention;
FIG. 2 is a cross sectional view taken along the line II--II in FIG. 1;
FIG. 3 is a cross sectional view taken along the line III--III in FIG. 1;
FIG. 4 is a top plane view in the direction of the arrow A in FIG. 1;
FIG. 5 is a side elevational view of a roller skate in accordance with the invention; and
FIG. 6 is an enlarged cross sectional view taken along the line VI--VI in FIG. 5.
REFERENCES:
patent: 3512195 (1970-05-01), Porsche
patent: 3934892 (1976-01-01), Baikie
patent: 4114295 (1978-09-01), Schaefer
patent: 4336948 (1982-06-01), Couture
patent: 4351537 (1982-09-01), Bratland et al.
Bratland Jan
Halvorsen Finn
Johnson Brian S.
Mitchell David M.
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