Roller skate

Abstract

Roller skates 1 comprise: a pair of shoes 3 having a shoe body 7 and a sole 9 ; and a roller 5 disposed for each shoe. The roller 5 comprises: an axle 17 obliquely extending downward from the inner edge of the shoe body 7 ; and wheels 51 disposed rotatably about the axle 17 . Each wheel 51 has a diameter larger than a distance between the sole 9 and the ground, and is angularly disposed over the inner edge of the shoe body 7 to underneath the sole 9 such that a ground engaging point of the wheel 51 is positioned approximately along the center line of the sole 9.

1 . Roller skates comprising: a pair of shoes having a shoe body and a sole; and a roller disposed for each shoe, 
 wherein the roller comprises: an axle obliquely extending downward from the inner edge of the shoe body; and front and rear wheels disposed rotatably about the axle;    each wheel has a diameter larger than a distance between the sole and the ground, and is angularly disposed over the inner edge of the shoe body to underneath the sole such that a ground engaging point of the wheel is positioned approximately along the center line of the sole; and    the wheel is formed into a cup or grinding bowl shape with one of its sides, which opposes the shoe body, having a recess and the other side having a projection.    
   
   
       2 . The roller skates according to  claim 1 , wherein each wheel is formed into a cup or grinding bowl shape with one of its sides, which opposes the shoe body, having a recess and the other side having a projection; and the wheel is so attached as to cover the portion projecting from the inside edge of the shoe body.  
   
   
       3 . The roller skates according to  claim 1  or  2 , 
 wherein the roller comprises: 
 a frame secured on the shoe body to the sole, and  
 an axle bracket disposed on the frame;  
   the axle protrudes from the axle bracket;    the axle is formed into a cylindrical shape and has a screw insertion hole on the inner surface with a female thread, and a male thread on the outer surface;    a hub bracket is disposed around the axle and plural balls are rollably provided between a bearing surface of the axle bracket and the bearing surface of the hub bracket;    a ball retaining bracket is provided around the axle such that it covers over the hub bracket while being engaged with the male thread on the outer surface of the axle, and plural balls are rollably provided between another bearing surface formed on the opposite side of the bearing surface of the hub bracket, and a bearing surface of the ball retaining bracket;    a bracket fixing screw is fitted into the female thread of the screw insertion hole of the axle to prevent removal of the ball retaining bracket;    
   
   
       4 . The roller skates according to  claim 3 , wherein a bracket abutment portion is formed on the bracket fixing screw to abut the edge surface of the ball retaining bracket in order to prevent removal of the ball retaining bracket.  
   
   
       5 . The roller skates according to  claim 3 , wherein on the outside edge of the screw insertion hole of the axle is formed a widened end which could be widened due to plural slits, and a small setscrew, which includes a screw portion and a larger diameter portion formed on the opposite end of the screw portion and having a diameter to become larger towards the end, can be fitted into the screw insertion hole.  
   
   
       6 . The roller skates according to any one of  claims 3  to  5 , wherein the axle bracket for each front and rear wheel is respectively fixed to the frame, and either one or both of the front and rear axle brackets can slide in the longitudinal direction so as to change a distance between them.  
   
   
       7 . The roller skates according to any one of  claims 3  to  6 , wherein the axle bracket for each front and rear wheel is respectively fixed to the frame in which either one or both of the front and rear axle brackets can be adjustably angled on the frame so as to subtly adjust the orientation of the wheel with respect to the skating direction.  
   
   
       8 . The roller skates according to any one of  claims 1  to  7 , wherein the rotation direction of the hub bracket when the roller skates move forward corresponds to the unscrewed direction of the ball retaining bracket.  
   
   
       9 . The roller skates according to any one of  claims 1  to  8 , wherein the rotation direction of the hub bracket when the roller skates move forward corresponds to the direction in which the bracket fixing screw is screwed deeply into the screw insertion hole.  
   
   
       10 . The roller skates according to any one of  claims 1  to  9 , wherein the cant angle of the wheel is 10 to 35 degrees.  
   
   
       11 . The roller skates according to any one of  claims 1  to  10 , wherein a tire is detachably or undetachably fixed to the outer edge of the wheel.  
   
   
       12 . The roller skates according to any one of  claims 1  to  11 , wherein the shoe body has a reinforcement made of rigid material on its inside edge.