| 摘要 |
A plastic ball socket for a grease lubricated ball joint socket, having a hemispherical inner cup composed of thin, hard, elastic material; an outer cup composed of soft elastic material at least partially containing the inner cup and having elongated ribs disposed on the outer surface of the outer cup to support the outer cup in the ball joint socket, spaced apart from the ball joint socket whereby the plastic ball socket may be deformed during use to form grease lubrication grooves between it and an inserted ball. |
