Stair exerciser apparatus

Abstract

The present invention relates to a stair exercise device for simulating stair climbing, the device having a plurality of steps which are activated by the weight of a person walking up them. A stationary platform at the base of the stair exercise device sends a signal to a controller to bring the exercise device to a controlled stop when an operator steps onto the platform. The steps of the exercise device stop in a predetermined location when the exercise device comes to a controlled stop, ensuring proper step location to allow the operator to easily enter and exit the exercise device. Steps have a step platform of a different color than the risers between steps to aid in foot placement.

What is claimed is: 
     
       1. A stair exerciser apparatus for simulating stair climbing, comprising:
 a frame having a base, a front portion, and a rear portion for resting on a substantially horizontal support surface; 
 a pair of shafts rotatably mounted to the frame, the pair of shafts including a lower shaft located toward the rotatably mounted on the frame rear of the apparatus portion and an upper shaft located rotatably mounted on the frame above and forward of the lower shaft and toward the front of the apparatus; 
 a pair of chain assemblies synchronously revolvably disposed about the pair of shafts to constitute an endless chain conveyor, at least an upper run of the endless chain conveyor supported by the frame conveyor operatively engaged with the upper shaft and the lower shaft; 
 a plurality of steps disposed across the endless chain joined to the conveyor and capable of moving cyclically following the revolving endless chain for movement with the conveyor, wherein along the upper run of the endless chain conveyor, each of the plurality of steps are is made up of a substantially horizontal step platform and a substantially vertical riser pivotably joined to the step platform, wherein each step platform is not less than 8 8.3 inches deep and not greater than 12 11.8 inches deep, and wherein a step proximate to the lower shaft is brought to a stop at a predetermined location as the step platform is partially rotated about the lower shaft such that the distance between the substantially horizontal support surface and the lowest portion of the step platform is between 12 inches and 14 inches; 
 a braking mechanism to adjust and control the resistance to rotation of at least one of the pair of shafts, and thereby to adjust and control the downwardly running speed of the steps operatively engaged with the conveyor; 
 a locking mechanism for preventing motion of the plurality of steps when the locking mechanism is engaged, the locking mechanism being engaged when the motion of the plurality of steps is fully stopped by the braking mechanism operatively engaged with the conveyor; 
 a step position sensor for determining the position disposed to sense a position of at least one of the plurality of steps along its cyclical movement and to generate step position data; and 
 a controller communicatively engaged with for receiving the step position data from the step position sensor, communicatively engaged with the locking mechanism, and the braking mechanism, whereby the controller adjusting adjusts and controlling controls the braking mechanism for adjusting the resistance of the apparatus, and the controller also adjusting adjusts and controlling controls the braking mechanism and the locking mechanism for bringing the plurality of steps to a controlled stop stopping at least one step in one of the one or more a predetermined locations, thereby to provide a stair landing position proximate the lower shaft that enables easy to enable ingress onto and egress from the apparatus at a fixed stair location. 
 
     
     
       2. The apparatus of  claim 1 , wherein each step platform is not less than 10 9.8 inches deep and not greater than 11 11.0 inches deep. 
     
     
       3. The apparatus of  claim 1 , wherein each step riser is not less than 7 7.1 inches high and not greater than 10 9.8 inches high. 
     
     
       4. The apparatus of  claim 1 , wherein each step riser is not less than 7.5 inches high and not greater than 9 inches high. 
     
     
       5. The apparatus of  claim 1 , further comprising a pair of handlebars, each handlebar having a contact heart rate pulse sensor built into the handlebar. 
     
     
       6. The apparatus of  claim 1 , further comprising a pair of handlebars, each handlebar having a contact heart rate pulse sensor built into the handlebar, and having at least one a handlebar having a control to adjust the downwardly running speed of the steps. 
     
     
       7. The apparatus of  claim 1 , further comprising at least one a handlebar, the at least one handlebar having a control to adjust the downwardly running speed of the steps. 
     
     
       8. The apparatus of  claim 1 , further comprising at least one a handlebar, the at least one handlebar having a control to bring to a stop the motion of the steps. 
     
     
       9. A stair exerciser apparatus for simulating stair climbing, comprising:
 a frame having a base resting on a substantially horizontal support surface; 
 a pair of shafts rotatably mounted to the frame, the pair of shafts including a lower shaft located toward the rear of the apparatus and an upper shaft located above the lower shaft and toward the front of the apparatus; 
 a pair of chain assemblies synchronously revolvably disposed about the pair of shafts to constitute an endless chain conveyor, at least an upper run of the endless chain conveyor supported by the frame; 
 a plurality of steps disposed across the endless chain conveyor and capable of moving cyclically following the revolving endless chain conveyor, wherein along the upper run of the endless chain conveyor, each of the plurality of steps are made up of a substantially horizontal step platform and a substantially vertical riser; 
 a braking mechanism to adjust and control the resistance to rotation of at least one of the pair of shafts, and thereby to adjust and control the downwardly running speed of the steps; 
 a locking mechanism for preventing motion of the plurality of steps when the locking mechanism is engaged, the locking mechanism being engaged when the motion of the plurality of steps is fully stopped by the braking mechanism; 
 a handlebar having a control to adjust the downwardly running speed of the steps and a control to bring to a stop the motion of the steps; 
 a sensor for determining the position of at least one of the plurality of steps along its cyclical movement; and 
 a controller communicatively engaged with the sensor, the locking mechanism, the braking mechanism, and the handlebar controls, the controller adjusting and controlling the braking mechanism for adjusting the resistance of the apparatus, the controller also adjusting and controlling the braking mechanism and the locking mechanism for bringing the plurality of steps to a controlled stop in one of one or more predetermined locations, thereby to provide a stair landing position proximate the lower shaft that enables easy ingress onto and egress from the apparatus. 
 
     
     
       10. The apparatus of claim 9, wherein each step platform is not less than 8.3 inches deep and not greater than 11.8 inches deep.  
     
     
       11. The apparatus of claim 9, wherein each step riser is not less than 7.1 inches high and not greater than 9.8 inches high.  
     
     
       12. The apparatus of claim 9, wherein each step riser is not less than 7.5 inches high and not greater than 9 inches high.  
     
     
       13. The apparatus of claim 9, wherein the handlebar includes a contact heart rate pulse sensor.  
     
     
       14. The apparatus of claim 9, and further comprising:
 a second handlebar, and the second handlebar includes a contact heart rate pulse sensor, and includes a control to adjust the downwardly running speed of the steps.    
     
     
       15. The apparatus of claim 9, and further comprising:
 a second handlebar, and the second handlebar includes a control to adjust the downwardly running speed of the steps.    
     
     
       16. The apparatus of claim 9, and further comprising:
 a second handlebar, and the second handlebar includes a control to bring to a stop the motion of the steps.    
     
     
       17. The apparatus of claim 9, wherein at least one chain assembly is meshed with the upper shaft.  
     
     
       18. The apparatus of claim 9, wherein the upper shaft comprises:
 a sprocket meshed with the endless chain conveyer.    
     
     
       19. The apparatus of claim 9, wherein the braking mechanism operatively engages the endless chain conveyor to variably resist movement of the endless chain conveyor.  
     
     
       20. The apparatus of claim 9, and further comprising:
 a flywheel rotatably mounted on the frame and operatively engaged with the endless chain conveyer and the braking mechanism.    
     
     
       21. The apparatus of claim 9, and further comprising:
 a flywheel rotatably mounted on the frame and operatively engaged with the upper shaft and the braking mechanism.    
     
     
       22. The apparatus of claim 9, and further comprising:
 a guide rail joined to the frame; and   a guide pin joined to one of the steps, and slidably engaged with the guide rail.    
     
     
       23. The apparatus of claim 9, and further comprising:
 a flow channel joined to the frame.    
     
     
       24. The apparatus of claim 9, and further comprising:
 a stationary platform joined to the frame.    
     
     
       25. The apparatus of claim 9, and further comprising:
 a stationary platform joined to the frame base.    
     
     
       26. The apparatus of claim 9, and further comprising:
 a stationary platform joined to the frame; and   a load sensing switch connected to the stationary platform and in communication with the controller to selectively engage the locking mechanism.    
     
     
       27. The apparatus of claim 1, wherein each step platform is not less than 8 inches deep and not greater than 12 inches deep.  
     
     
       28. The apparatus of claim 1, wherein the conveyor comprises:
 a first chain assembly; and   a second chain assembly, and each chain assembly is operatively engaged with the upper shaft and the lower shaft.    
     
     
       29. The apparatus of claim 1, wherein the conveyor comprises:
 a chain conveyer.    
     
     
       30. The apparatus of claim 1, wherein the braking mechanism operatively engages the conveyor to variably resist movement of the conveyor.  
     
     
       31. The apparatus of claim 1, and further comprising:
 a flywheel rotatably mounted on the frame and operatively engaged with the conveyer and the braking mechanism.    
     
     
       32. The apparatus of claim 1, and further comprising:
 a flywheel rotatably mounted on the frame and operatively engaged with the upper shaft and the braking mechanism.    
     
     
       33. The apparatus of claim 1, and further comprising:
 a guide rail joined to the frame; and   a guide pin joined to one of the steps, and slidably engaged with the guide rail.    
     
     
       34. The apparatus of claim 1, and further comprising:
 a flow channel joined to the frame.    
     
     
       35. The apparatus of claim 1, and further comprising:
 a stationary platform joined to the frame.    
     
     
       36. The apparatus of claim 1, and further comprising:
 a stationary platform joined to the frame base.    
     
     
       37. The apparatus of claim 1, and further comprising:
 a stationary platform joined to the frame; and   a load sensing switch connected to the stationary platform and in communication with the controller to selectively engage the locking mechanism.