Patent ID: 6412747
Filing Date: 2002-07-02
Classification: A63B

Abstract:
A sports ballast base comprising:a base member having a top surface, a bottom surface, the bottom surface adapted to contact a support surface, a bottom recession in said bottom surface of said base member, and a hole defined through said base member extending from said bottom recession to the top surface; a displaceable first wheel assembly having at least one wheel for contacting the support surface, said first wheel assembly configured to be displaced from a lowered position to a raised position such that when in the raised position, the bottom surface of said base member substantially contacts the support surface and when in the lowered position said at least one wheel contacts the support surface thereby separating said base member from the support surface; and a second wheel assembly fixed in position and having at least one wheel engaging the support surface; wherein said displaceable first wheel assembly further comprises: at least one caster having a top portion attached to said base member within said bottom recession and threads on the top portion of said at least one caster for engaging said base member; and a retraction device having a first end and a second end, pivotally attached at said second end by a mounting bracket disposed within said hole, said second end being configured to engage the top portion of said at least one caster.