| 摘要 |
<p>The invention consists of a caster comprises a yoke having a weight trans ferring tab and a wheel with groove for receiving the tab.. Preferably, the yoke and wheel are made out of plastic, and in some embodiments two differen t types of plastic. A tab and groove helps transfer the weight of the load o n the castor away from the arms of the yoke and onto the wheel. In a preferr ed embodiment the plastic wheel is molded so as to include a shaft on either side that snap into receiving holes in the yoke, thus avoiding the need for separate axel and rivets.</p> |
