Patent ID: 8986174
Filing Date: 2015-03-24
Classification: A63B,Y10T

Abstract:
1. A barbell comprising a bar assembly that comprises: a sleeve rotatably fitted over a rotating-locking mechanism at an end of a shaft; and an end cap attached to an open end of the sleeve to enclose the rotating-locking mechanism and the end of the shaft inside the sleeve, wherein the rotating-locking mechanism comprises a supporting ring rotatably fitted over the shaft and a joining ring attached to the end of the shaft, wherein the supporting ring abuts, at a first end of the supporting ring, a shoulder on an inner surface of the sleeve and abuts the joining ring at a second end of the supporting ring, wherein the joining ring includes threads on an internal surface and is attached to the end of the shaft by thread engagement, and a pin is inserted through an off-center hole in the joining ring and into an off-center hole in the end of the shaft to prevent the joining ring from rotating around the shaft.