| 摘要 |
A caster is provided that is vertically and rigidly coupled to a heavy instrument via a connecting member surrounded by a resilient damper that will flex under horizontal loading. The caster is improved in that the connecting member connects to a vertical load plate having a horizontal extension that provides a moment arm that exceeds any moment arm of the journal axis of the caster, thereby ensuring that minimum vertical preloading of the damper occurs, reducing the tendency to provide harmonic oscillation under vertical loading. |
