Roller skate arrangement

Land vehicles – Skates – Wheeled skate

Patent

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Details

A63C 1702

Patent

active

046590951

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to a roller skate arrangement, comprising a rigid sole portion to which a shoe upper portion is secured on the top side and on the under side a forward and a rear pair of wheels or wheel bogies The skates is such that the sole portion is pivotable sideways about a longitudinal roller skate axis relative to the plane of the road base.
Roller skates are known of various constructions. Usually roller skates are designed with a rigid and immovable connection between the wheels and the user's footwear or the footwear secured to the roller skate. The wheels of the roller skate are locked in a direction which approximately coincides with the longitudinal direction of the roller skate. As a consequence of the rigid and immovable connection between footwear and wheels, a somewhat unnatural foot position and unnatural use of the muscles occurs. Compared with using conventional skates on an ice surface, one has far less control of a roller skate and the possibility for far less steering.
German O.S. No. 2029676 describes a roller skate where the sole portion is pivotable about a longitudinal roller skate axis relative to the road base and relative to the rotation axes of each wheel pair. By such a known solution a certain, but nevertheless rather limited movability of the foot with associated sole portion relative to the wheels of the roller skate is achieved. The oblique positioning of foot and sole portion is dependent on the counter force from a press spring or the like.
With the present invention the aim is a solution with which one can obtain a far better control of the movement possibilities of the roller skate.
U.S. Pat. No. 3,389,922 describes a roller ski with a forward wheel and a rear wheel where the rotary shaft of the wheels is pivotable relative to the wheel hub, which is provided with a substantially elliptical or oval groove for limited revolving of the rotary shaft in this. By this there is the possibility for effecting a turning of the wheels relative to their rotary shafts by obliquely positioning the roller ski sideways.
With the relatively small wheels (small wheel diameter) which is employed in a roller skate such a known solution for turning of roller skis will give the possibility for minimum pivoting of the roller skate, and in addition the control of the pivotal movement becomes rather arbitrary and can easily produce undesired sudden turns as a consequence of the insufficient possibility for control.
The arrangement according to the invention is characterised in that the rotation axis of each wheel in each wheel pair can be pivoted individually relative to the plane of the road base, decided by the turning of the sole portion relative to the plane of the road base, the turning of the rotation axis of each wheel relative to the plane of the road base being positively controlled via connecting members from the sole portion, and that the wheels of the rear wheel pair are pivotable about a first pivotal axis running at right angles to the main plane of the sole portion and the wheels of the forward wheel pair are correspondingly pivotable about a second pivotal axis at right angles to the main plane of the sole portion, the turning of each wheel pair about its pivotal axis being positively controlled via control means from the sole portion, preferably with a more limited pivoting possibility of the forward wheel pair than of the rear wheel pair.
According to the invention an accurately controllable turning possibility of the roller skate is achieved by permitting turning about a vertical axis of each wheel pair and in addition a turning possibility of the axis of each wheel individually relative to the base. A positive control is provided between the different pivotable portions, so that for a particular oblique position of the foot there is a particular turning of the wheel pairs about the axis at right angles to the sole portion and a particular oblique position of the rotation axis of each wheel, respectively. It is hereby possible for the user of the roller ska

REFERENCES:
patent: 208508 (1878-10-01), Bowen
patent: 304014 (1884-08-01), Lincoln
patent: 4125268 (1978-01-01), Varner et al.
patent: 4159128 (1979-08-01), Blaine

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