In-line skate with a shock-absorbing device

Abstract

An in-line skate with a shock-absorbing device has a boot and a chassis attached under the boot. The chassis has a wheel frame, multiple wheels, a rear wheel bracket and a shock-absorbing device. The wheel frame has a middle and a rear end. The rear wheel bracket is pivotally attached to the middle of the wheel frame and extends toward the rear end of the wheel frame. The shock-absorbing device obliquely and pivotally attaches the wheel frame and the rear wheel bracket. Thereby, the shock-absorbing device significantly reduces vertical and horizontal vibrations and shocks by damping the rear wheel bracket with the shock-absorbing device. Since the pivoting rear wheel bracket has a length much shorter than a conventional pivoting wheel mount and is essentially a moment arm with regard to applied shock, the in-line skate is much more stable than a conventional in-line skate.

1 . An in-line skate with a shock-absorbing device comprising: 
 a boot having a bottom; and    a chassis attached to the bottom of the boot and comprising 
 a wheel frame ( 10 ) with a top surface, a bottom surface, a front end, a rear end, and a middle and having 
 a front wheel well ( 11 A,  11 B) formed on the bottom surface at the front end;  
 multiple front wheels ( 12 ) mounted rotatably in a line in the front wheel well ( 11 A,  11 B);  
 a middle recess ( 14 ) defined at the middle between the front end and the rear end of the wheel frame ( 10 ) and forms two outer walls;  
 two pin holes ( 15 ) defined respectively in the two outer walls and aligned with each other; and  
 a pivot pin ( 16 ) mounted in the pin holes ( 15 );  
 a rear wheel bracket ( 20 ) pivotally attached to the wheel frame ( 10 ) near the middle, extending toward the rear end of the wheel frame ( 10 ) and having a proximal end ( 21 ), a distal end and a rear wheel well ( 23 ) formed near the distal end, wherein the proximal end ( 21 ) of the rear wheel bracket ( 20 ) pivotally mounted in the middle recess ( 14 ) and having a through hole ( 22 ) defined in the proximal end ( 21 ) to align with the pin holes ( 15 ) in the wheel frame ( 10 ) through which the pivot pin ( 16 ) passes through to pivotally attach the rear wheel bracket ( 20 ) to the wheel frame ( 10 );  
 
 a rear wheel ( 24 ) rotatably mounted in the rear wheel well ( 23 ) in the rear wheel bracket ( 20 ); and  
   a shock-absorbing device ( 30 ) attached pivotally to the rear end of the wheel frame ( 10 ) and the rear wheel bracket ( 20 ) at an angle other than perpendicular with respect to the wheel frame ( 10 ).    
   
   
       2 . (canceled)  
   
   
       3 . The in-line skate with a shock-absorbing device as claimed in  claim 1 , wherein 
 the wheel frame ( 10 ) further has an eye bracket ( 13 ) formed on the bottom of the wheel frame near the middle recess ( 14 ) between the middle recess ( 14 ) and the rear end of the wheel frame ( 10 );    the rear wheel bracket ( 20 ) further has 
 a vertical limit formed on a top of the rear wheel bracket ( 20 ) between the proximal end ( 21 ) and the distal end; and  
 an eye bracket ( 26 ) formed on the top of the wheel bracket ( 20 ) forward of the vertical limit;  
   the shock-absorbing device ( 30 ) having a proximal end, a distal end, two pivot pins ( 33 ,  34 ) and two eyes ( 31 ,  32 ) formed respectively on the proximal and distal ends and pivotally attached respectively to the eye brackets ( 13 ,  26 ) with the pivot pins ( 33 ,  34 ).    
   
   
       4 . The in-line skate with a shock-absorbing device as claimed in  claim 3 , wherein the shock-absorbing device ( 30 ) is a spring shock absorber.  
   
   
       5 . The in-line skate with a shock-absorbing device as claimed in  claim 3 , wherein the rear wheel bracket ( 20 ) further has a brake ( 25 ) attached to the distal end of the rear wheel bracket ( 20 ).  
   
   
       6 . The in-line skate with a shock-absorbing device as claimed in  claim 5 , wherein the brake ( 25 ) is a cylindrical abrasive block made of rubber.