Patent ID: 6405990
Filing Date: 2002-06-18
Classification: A63B

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