Patent ID: 7837603

Claim:
A portable exercise device, comprising: at least one wheel; an axle mounted centrally for and through said wheel about which said wheel rotates, said axle having a first end and a second end, wherein a first groove, parallel to the longitudinal axis of said axle, is shaped into said axle at said first end, and a second groove, parallel to the longitudinal axis of said axle, is shaped into said axle at said second end; and a pair of handle grips having a generally hollow interior each said handle grip comprising a pin extending into the interior of said handle grip, said pin being sized and configured to engage said first or second groove, and wherein each said first and second groove further includes two grooved branches shaped into said axle, substantially perpendicular to and connected to each said first and second groove, said two grooved branches being spaced sufficiently such that, when two wheels are mounted on said axle, said pin in said handle grip can engage in one of said two grooved branches.