77035

Abstract

An exercise apparatus has a repositionable crank with a crank drive. The crank drive is housed in a base unit mounted on a platform. Various exercise machines such as a stationary bike, rowing machine, and elliptical machine are selectively mounted to the base unit and engage the crank drive to provide a variety of exercises.

What is claimed is: 
     
         1 . An exercise apparatus having a repositionable crank and a power source connector to provide power to the repositionable crank, the crank comprising a crank drive further comprising a main body; a crank-receiving aperture at a first end; a top portion at a second end, the top portion having a top receiving aperture; and a top piece having an irregularly shaped protrusion on a first side, the top receiving aperture having an irregular shape complimentary to the irregular shape of the top piece protrusion such that the top piece fits into the top receiving aperture. 
     
     
         2 . The exercise apparatus of  claim 1 , wherein the irregular shape of the top piece protrusion comprises a hexagon shape with a tongue extension. 
     
     
         3 . The exercise apparatus of  claim 1 , further comprising a base unit to house the crank drive. 
     
     
         4 . The apparatus of  claim 3 , further comprising a platform upon which the base unit is mountable. 
     
     
         5 . The apparatus of  claim 4 , further comprising at least one exercise machine selectively mountable to the platform and selectively engageable with the crank drive. 
     
     
         6 . The apparatus of  claim 5 , wherein the at least one exercise machine comprises a stationary bicycle. 
     
     
         7 . The apparatus of  claim 6 , wherein the stationary bicycle comprises pedals connected to the crank drive. 
     
     
         8 . The apparatus of  claim 5 , wherein the at least one exercise machine comprises a rowing machine. 
     
     
         9 . The apparatus of  claim 8 , wherein the rowing machine comprises a pulley connected to the crank drive. 
     
     
         10 . The apparatus of  claim 5 , wherein the at least one exercise machine comprises an elliptical machine. 
     
     
         11 . The apparatus of  claim 5 , wherein the at least one exercise machine comprises a recumbent stationary bicycle. 
     
     
         12 . The apparatus of  claim 5 , wherein the at least one exercise machine comprises a hand crank. 
     
     
         13 . The apparatus of  claim 4 , wherein the platform further comprises a position marker rail member extending from the platform. 
     
     
         14 . The apparatus of  claim 13 , further comprising a lock to selectively secure the platform at a selected position on the position marker rail member. 
     
     
         15 . The apparatus of  claim 13 , further comprising a terminus member attached to the position marker rail member. 
     
     
         16 . The apparatus of  claim 13 , wherein the position marker rail member comprises a spine. 
     
     
         17 . The apparatus of  claim 3 , wherein the base unit further comprises a pivotable mount to the platform such that the base unit is able to be selectively pivoted to a selected position. 
     
     
         18 . The apparatus of  claim 3 , wherein the base unit further comprises a wireless control unit. 
     
     
         19 . An exercise apparatus having a repositionable crank and a power source connector to provide power to the repositionable crank, the crank comprising a crank drive further comprising a main body; a crank-receiving aperture at a first end; a top portion at a second end, the top portion having a top receiving aperture; and a top piece having an irregularly shaped protrusion on a first side, the top receiving aperture having an irregular shape complimentary to the irregular shape of the top piece protrusion such that the top piece fits into the top receiving aperture;
 the apparatus further comprising:   a base unit to house the crank drive;   a platform upon which the base unit is mountable;   a wireless control unit mounted in the base unit and connected to the crank drive; and   at least one exercise machine selectively mountable to the platform and selectively engageable with the crank drive.