| 摘要 |
A novel mechanism for positioning a hospital bed in a plurality of shock and drainage positions utilized means for rotating the base of a support parallelogram in an arc. The rotating means are a pair of roller supported arc segments with the lower pivoting points of the support parallelogram positioned at the lower extremities of the arc segments. A crank mechanism positioned on the bed frame moves the rocker arms such that the desired shock or drainage position is attained and the bed may be raised or lowered while in any shock or drainage position.
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