Aerobic step cube

Abstract

Aerobic step apparatus comprised of stacked interfitting components simulating a unitary structure from which a plurality of different height steps can be selectively assembled. By selectively combining the different components when disassembled from their unitary structure, at least seven steps of different heights can be readily formed.

We claim:  
     
         1 . Aerobic step apparatus comprising: 
 stacked interfitting components simulating a unitary structure from which a plurality of different components can be selectively withdrawn and assembled to form different height steps.    
     
     
         2 . Aerobic step apparatus in accordance with  claim 1  in which said plurality of different components are suitable to form at least two different height steps from components of said apparatus selectively separated from the simulating unitary structure.  
     
     
         3 . Aerobic step apparatus in accordance with  claim 2  in which a plurality of different height steps can comprise any of at least seven different height steps.  
     
     
         4 . Aerobic step apparatus comprising: 
 a) a first box with walls of predetermined height and rectangular configuration have a closed top end; and    b) at least one second box of predetermined height and rectangular configuration adapted to interfit with said first box at the underside of said first box and which when assembled onto said first box cooperates with said first box for establishing a selected step height.    
     
     
         5 . Aerobic step apparatus comprising: 
 a) a first box with walls of predetermined height and rectangular configuration having a closed top end;    b) a plurality of second boxes of like rectangular configuration of different heights and adapted to be stacked contiguously one above the other, and    c) interfitting means positioned above selective of said second boxes to enable said second boxes to interfit with each other in a stacking relation.    
     
     
         6 . Aerobic apparatus in accordance with  claim 5  in which at least one of said second boxes includes internal stop means for supporting the intermitting means of another of said second boxes contiguously above said at least one second box.  
     
     
         7 . Aerobic apparatus in accordance with  claim 6  in which said at least one of said second boxes can be installed inverted with respect to another second box for increasing the effective height of their combination.  
     
     
         8 . An aerobic apparatus in accordance with  claim 7  in which said interfitting means includes an interfit rectangular box attached internally to one of said second boxes.