Passive-type treadmill

Abstract

A passive-type treadmill is disclosed which includes a closed-loop belt rolling around two spaced apart rollers for providing a substantially horizontal running platform, a first and a second support-rail parallel to each other, rigidly coupled to a frame of the running platform and extended upward, a first and a second handrail adjustably attached to the first and the second support rail, respectively, and a first and a second handle protruding from the first and the second handrail, respectively, the first and the second handle being separated and positioned in front of a user at approximately his or her shoulder height in operation by adjusting the first and the second hardrail.

What is claimed is: 
     
         1 . A passive-type treadmill comprising:
 a closed-loop belt rolling around two spaced apart rollers for providing a substantially horizontal running platform;   a first and a second support-rail parallel to each other, rigidly coupled to a frame of the running platform and extended upward;   a first and a second handrail adjustably attached to the first and the second support rail, respectively; and   a first and a second handle protruding from the first and the second handrail, respectively, the first and the second handle being separated and positioned in front of a user at approximately his or her shoulder height in operation by adjusting the first and the second handrail.   
     
     
         2 . The passive-type treadmill of  claim 1  further comprising a substantially horizontal crossbar connected between the first and the second support-rail. 
     
     
         3 . The passive-type treadmill of  claim 2  further comprising an exercise monitor mounted on the crossbar. 
     
     
         4 . The passive-type treadmill of  claim 1 , wherein the first and second support-rail have approximately the same length. 
     
     
         5 . The passive-type treadmill of  claim 1 , wherein the first and second handrail have approximately the same length. 
     
     
         6 . The passive-type treadmill of  claim 1 , wherein the adjustably attached includes the first and the second handrail slidably engaging the first and the second support-rail, respectively. 
     
     
         7 . The passive-type treadmill of  claim 6 , wherein the first and the second support-rail lean forward by a predetermined angle. 
     
     
         8 . The passive-type treadmill of  claim 6  further comprising a first spring-loaded pin attached to the first handrail and capable of being inserted into one of a first plurality of holes on the first support-rail for locking the first handrail to a desired position of the first support-rail; and a second spring-loaded pin attached to the second handrail and capable of being inserted into one of a second plurality of holes on the second support-rail for locking the second handrail to a desired position of the second support-rail. 
     
     
         9 . The passive-type treadmill of  claim 8 , wherein the first and the second plurality of holes have the same number of holes and each hole in the first plurality of holes horizontally corresponds a hole in the second plurality of holes. 
     
     
         10 . The passive-type treadmill of  claim 1 , wherein the adjustably attached includes the first and the second handrail pivotally engaging the first and the second support-rail, respectively. 
     
     
         11 . The passive-type treadmill of  claim 10  further comprising a first and a second mounting plate rigidly connected to the first and second support-rail, respectively, with the first and the second handrail pivotally attached to the first and the second mounting plate, respectively. 
     
     
         12 . The passive-type treadmill of  claim 11  further comprising a first pin securely inserted in a hole in the first mounting plate and a hole in the first handrail, wherein the first handrail can rotate around the first pin; and a second pin securely inserted in a hole in the second mounting plate and a hole in the second handrail, wherein the second handrail can rotate around the second pin. 
     
     
         13 . The passive-type treadmill of  claim 12  further comprising a first screw fastening the first mounting plate to the first handrail through one of a plurality of holes in the first mounting plate; and a second screw fastening the second mounting plate to the second handrail through one of a plurality of holes in the second mounting plate. 
     
     
         14 . The passive-type treadmill of  claim 1 , wherein the first and the second handrail are substantially parallel to each other. 
     
     
         15 . The passive-type treadmill of  claim 1 , wherein the first and second handle are aligned in substantially the same straight line. 
     
     
         16 . The passive-type treadmill of  claim 1 , wherein the first and the second handle are substantially parallel to the running platform. 
     
     
         17 . The passive-type treadmill of  claim 1 , wherein the first handle is substantially perpendicular to the first handrail; and the second handle is substantially perpendicular to the second handrail. 
     
     
         18 . The passive-type treadmill of  claim 1 , wherein one of the rollers is coupled to a load control device 
     
     
         19 . The passive-type treadmill of  claim 17 , wherein the load control device operates in a principle selected from the group consisting of wind, magnet and friction.