| 摘要 |
The invention provides for coupling or uncoupling adjacent relatively moveable machine elements. One element has a circular or elongated recess defining frictionally engageable surfaces. The other element carries a curved spring member which fits into the recess loosely normally and is adapted for being flattened and expanded by moving one of the elements toward the other. The ends of the spring member thereby grip the frictionally engageable surfaces and couple the two elements together.
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