| 摘要 |
<p>The headrest and side rails of a patient procedures chair are mounted on posts which are slidably received in elongated, self-aligning or floating plastic bearings. With this construction, any misalignment of the posts due to manufacturing tolerances will be accounted for as the bearings readjust themselves. Clamping devices engage the bearings and cause deformation to increase the frictional engagement of the bearings with the posts to the point where the posts are locked into place. In this regard, actuation of the clamps is accomplished by large knobs that protrude from the back of the chair for ready accessibility.</p> |
