| 摘要 |
A universal joint comprises inner and outer drive members, two drive balls located in the complementary funnel-shaped ball grooves of the inner and outer drive members and a pilot member which engages for the two drive balls to locate the drive balls in cooperation with the complementary funnel-shaped grooves. The two drive balls are 180 DEG apart and the pilot member is hinge-connected to the inner drive member for pivotal movement solely about an axis which is perpendicular to an axis through the center of the two drive balls.
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