Patent ID: 7862486
Filing Date: 2011-01-04
Classification: A63B

Abstract:
1. A weightlifting barbell, comprising: a center bar having a first end and a second end; a first grip housing attached to said center bar at said first end; a second grip housing attached to said center bar at said second end; an interior circumferential groove disposed within said first and second grip housings; a first and second handgrip, said first and second handgrips each having a first and second end; a plurality of radial wall bearings located at each of said first and second ends of said first and second handgrips, said radial wall bearings being circular in shape with said circular surfaces of said radial wall bearings being perpendicular to the axis of rotation of said first and second handgrips; a plurality of sidewall bearings located at each of said first and second ends of said first and second handgrips, said sidewall bearings being circular in shape with said circular surfaces of said sidewall bearings being parallel to the axis of rotation of said first and second handgrips, said first handgrip being rotatably engaged within said first grip housing with said radial wall bearings and said sidewall bearings being disposed within said interior circumferential groove, said second handgrip being rotatably engaged within said second grip housing with said radial wall bearing and said sidewall bearings being disposed within said interior circumferential groove; and a first spring disposed at each said first end of said handgrips and a second spring disposed at each said second end of said handgrips so that a constant force is applied to said radial wall bearings.