Wheel

Abstract

The invention relates to a wheel ( 1; 1 a, 1 b ) for a piece of sports equipment, especially for grass skiing, comprising a rim ( 2 ), a tire ( 3 ) that is fastened to the rim ( 2 ) and is provided with a tread ( 9 ), and at least one support element ( 6 ) for the tire ( 3 ), which is embodied in a resilient manner. The riding behavior can be made to largely match that of alpine skis due to the fact that the support element extends in a curved manner from a first bearing section ( 5 ) to a second bearing section ( 5 ) and supports the tire ( 3 ) essentially along the entire distance of the cross-section thereof while the tire ( 3 ) has a multilayer structure and is provided with a layer ( 10 ) that is elastic in the direction of the thickness thereof.

1 . A wheel ( 1 ,  1   a ,  1   b ) for a piece of sports equipment, especially for grass skiing, comprising a rim ( 2 ) and a tire ( 3 ) that consists of several layers, is fastened to the rim ( 2 ) and is provided with a tread ( 9 ), and at least one support element ( 6 ) for the tire ( 3 ), which support element is provided with a resilient configuration and extends in a curved manner from a first bearing section ( 5 ) to a second bearing section ( 5 ), wherein the support element ( 6 ) supports the tire ( 3 ) essentially along the entire distance of the cross section thereof, and that the tire ( 3 ) is provided, adjacent to the tread towards the interior of the wheel, with a layer ( 10 ) that is elastic in the direction of thickness thereof.  
   
   
       2 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein the first and second bearing section ( 5 ) are arranged at mutually opposite sides of the outer circumference of the rim ( 2 ).  
   
   
       3 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein a plurality of support elements ( 6 ) are provided which are arranged in the circumferential direction at a distance next to one another.  
   
   
       4 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein the layer ( 10 ) which is elastic in the direction of thickness consists of sponge rubber and comprises a thickness (D 2 ) in the medial plane ( 2   a ) which is at least five times but preferably ten times as large as the thickness (D 1 ) of the tread ( 9 ).  
   
   
       5 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 3 , wherein the support elements ( 6 ) are arranged as meandering spring wires.  
   
   
       6 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein additional spring elements are provided for supporting the support elements ( 6 ).  
   
   
       7 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein the support element ( 6 ) is clamped on the rim ( 2 ).  
   
   
       8 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein the support element ( 6 ) is articulated on the rim ( 2 ).  
   
   
       9 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein the support element ( 6 ) is resiliently held on the rim ( 2 ).  
   
   
       10 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein the wheel ( 3 ) is rigidly connected on both sides with the rim ( 2 ) and rests freely on the support element ( 6 ).  
   
   
       11 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein the wheel ( 3 ) is provided with a three-layer configuration and consists of a tread ( 9 ), a soft-elastic inner layer ( 10 ) and a support layer ( 11 ).  
   
   
       12 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein an engagement element ( 13 ) is provided on the rim ( 2 ) adjacent to the wheel ( 3 ), which engagement element extends along the circumference of the rim ( 2 ).  
   
   
       13 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein the wheel ( 3 ) is provided with a non-pressurized configuration.  
   
   
       14 . A wheel ( 1 ;  1   a ,  1   b ) according to  claim 1 , wherein the outside diameter of the rim ( 2 ) corresponds to approximately half the outside diameter (D) of the tire ( 3 ).  
   
   
       15 . A piece of sports equipment, especially for grass skiing, comprising a frame ( 20 ) which extends in the longitudinal direction and on which at least two wheels ( 1 ;  1   a ,  1   b ) with elastically deformable tires ( 3 ) are rigidly held, a binding ( 21 ) for fastening the sports device to a shoe ( 22 ) of a person using the sports device, with a front wheel ( 1   a ) being arranged in front of the binding ( 21 ) and a rear wheel ( 1   b ) being arranged behind the binding ( 21 ), and with an extension ( 25 ) being provided on the frame ( 20 ),behind the rear wheel ( 1   b ), which extension is designated for steering the sports device and comprises at its distal end a support section ( 26 ), wherein the extension ( 25 ) can be brought by displacement of weight from a position above the ground ( 27 ) to a position in which as a result of sufficient deformability of the wheels ( 1 ;  1   a ,  1   b ) it simultaneously touches the ground ( 27 ) with the front and rear wheels ( 1   a ,  1   b ), and that at least one wheel ( 1 ;  1   a ,  1   b ) is arranged according to  claim 1 .  
   
   
       16 . A sports device according to  claim 15 , wherein the extension ( 26 ) is fastened to the frame in a resilient manner.  
   
   
       17 . A sports device according to  claim 15 , wherein the extension ( 26 ) is elastic.  
   
   
       18 . A sports device according to  claim 15 , wherein the support section ( 26 ) is provided with a plate-like configuration.  
   
   
       19 . A sports device according to  claim 15 , wherein the diameter (D) of the wheels ( 1 ;  1   a ,  1   b ) is between 20% and 50%, preferably approximately 30% of the axial distance (L).  
   
   
       20 . A sports device according to  claim 15 , wherein the binding ( 21 ) is arranged directly in front of the rear wheel ( 1   b ).  
   
   
       21 . A sports device according to  claim 15 , wherein the frame ( 20 ) is provided with a rigid configuration.  
   
   
       22 . A sports device according to  claim 15 , wherein the distance (A) of the support section ( 26 ) from the axle ( 29 ) of the rear wheel ( 1   b ) is between 30% and 60%, preferably between 40% and 50% of the axle base (L).  
   
   
       23 . A sports device according to  claim 15 , wherein at nominal load the support section ( 26 ) is at a height (x) above the ground which is lower than the path (y, z) by which the rear wheel ( 1   b ) or the front wheel ( 1   a ) are deformed.  
   
   
       24 . A sports device according to  claim 15 , wherein at nominal load the path (y, z) by which the rear wheel ( 1   b ) or the front wheel ( 1   a ) are deformed is larger than 15 mm.