| 摘要 |
An apparatus for locking a universal joint is provide. The universal joint comprises first and second ends, a first member pivotally connected to said first end about a first axis, and a second member pivotally connected to the first member about a second axis wherein the first axis and the second axis are perpendicular to and intersect each other and wherein the second end is operably connected to the second member. The apparatus comprises a ring rotationally connected to the second pivotable member about a plane containing the second axis, a restraint for restraining the ring from rotation about the first axis, and a lock for locking the ring relative to the first member.
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