Rolling sports equipment
OwnerHarry Gausinventor
Life of this patent
Estimating the term…
Abstract
In a roller sport device, particularly a single-track skateboard or a single-track roller skate, having two roller axles disposed one behind the other with single-track rollers which run one behind the other and which are disposed thereon, which axles are disposed on a board or on a supporting frame, the rearmost of the two roller axles (rear axle) can swivel about an axle (steering axle) which points obliquely downwards and forwards and which forms a trailing angle. The running faces of the rollers are curved transversely to the direction of travel and have a high coefficient of friction similar to that of rubber.
Claims39
A roller sport device, particularly a single-track skateboard or single-track roller skate, having two roller axles disposed one behind the other with single-track rollers which run one behind the other and which are disposed thereon, which axles are disposed on a board or on a supporting frame, characterised in that the rearmost of the two roller axles (rear axle) can swivel about an axle (3, 21, 25, 32, 34, 41, 71) (steering axle) which points obliquely downwards and forwards and which forms a trailing angle, that the running faces (7′, 12′) of the rollers (7, 12) are curved transversely to the direction of travel and that the running faces (7′, 12′) have a high coefficient of friction similar to that of rubber.
A roller sport device according to any one of the preceding claims, characterised in that the running faces (7′, 12′) are curved approximately spherically, with a radius of curvature which approximates to the roller radius, so that the distance from the point of contact of the respective roller (7, 12) to the center thereof does not substantially change over the entire range of oblique positions which can be covered.
A roller sport device according to any one of the preceding claims, characterised in that the running faces (7′, 12′) are formed transversely to the direction of running so that the distance from the roller center to the point of contact of the roller (7, 12) is a minimum when the roller axles are horizontal.
A roller sport device according to any one of the preceding claims, characterised in that the running faces are cylindrical over a narrow central region.
A roller sport device according to any one of the preceding claims, characterised in that the distance from the rear roller axle (8, 31) to the steering axle (3, 21, 25, 32, 34, 41, 71) is less than the roller radius.
A roller sport device according to any one of the preceding claims, characterised in that the distance of the steering axle (3, 21, 25, 32, 34, 41, 71) from the rear roller axle (8, 31) is about {fraction (2/10)} to {fraction (6/10)} of the roller radius.
A roller sport device according to any one of the preceding claims, characterised in that the distance between the rear roller axle and the steering axle is zero or negative.
A roller sport device according to any one of the preceding claims, characterised in that the two rollers (7, 12) are each divided transversely to the roller axle into two half rollers which are at a spacing from each other for the passage of parts which bear the mounting.
A roller sport device according to any one of the preceding claims, characterised in that the rear roller axle (8, 31) is attached to a steering body (6, 29, 36, 72) which can swivel about the steering axle (3, 21, 25, 32, 34, 41, 71) by overcoming elastic restoring forces.
A roller sport device according to any one of the preceding claims, characterised in that the rollers (7, 12) consist of a supporting shell made of light metal or plastics and of an external covering (7′, 12′) made of a polymer with a high coefficient of friction (vulcanised rubber, polyurethane, natural rubber) in relation to the road surface.
A roller sport device according to any one of the preceding claims, characterised in that the rear roller (7) is larger than the front roller (12).
A roller sport device according to any one of the preceding claims, characterised in that the spacing of each of the two half rollers of a roller (7, 12) in relation to each other is adjustable.
A roller sport device according to any one of the preceding claims, characterised in that the rollers (7, 12) are provided with a hard covering further inwards and with a soft covering further outwards.
A roller sport device according to any one of the preceding claims, characterised in that the roller axles are fixed to a frame (1, 71) which consists of a supporting beam and which is provided at the top with placement holders (2) for fixing a shoe, that the front end of the frame protrudes through the gap between the front half rollers (12) and bears the front roller axle (13), and at the rear the frame comprises a steering stub (3, 21, 25, 32, 34, 41, 71) which forms the steering axle and which is fixedly attached to the frame, and which protrudes between the rear half rollers (7) into the interior thereof, and that the steering body (6, 29, 36, 72) is disposed inside the rear roller (7).
A roller sport device according to any one of the preceding claims, characterised in that the steering stub (3) is bent and is anchored by means of a screwed joint (5) so that the direction of action of the screwed joint (5) points towards the point of contact of the rear roller (7).
A roller sport device according to any one of claims of 19 to 27, characterised in that the steering body (6) has a bore with which it is fitted over the steering stub (3′) in the manner of a sleeve, wherein the bore is wider than the steering stub (3′), and that the gap between the bore and the steering stub (3) is filled with an elastically resilient material (6′).
A roller sport device according to any one of the preceding claims, characterised in that two restoring springs which are coupled to the steering body are prestressed in relation to each other and are secured by limit stops so that a threshold moment has to be overcome in order to rotate the steering body.
A roller sport device according to any one of the preceding claims, characterised in that the restoring resistance of the steering and/or the threshold moment of the steering body are adjustable.
A roller sport device according to any one of the preceding claims, characterised in that the rollers are of unsymmetrical design.
A roller sport device according to any one of the preceding claims, characterised in that a parking brake (38) is provided by means of which at least one of the rollers can be fixed, and that the parking brake (38) is formed by a pin/locking element which can be inserted in the rollers/roller axle or can be inserted via a polygonal formation on the roller, and which are comprises a grip in the form of a protruding mark which is easily visible.
Dependencies are inferred from the claim text.