| 摘要 |
<p>A seat designed to give assistance to the user in rising from a seated position is hinged to the seat frame at or adjacent to one edge of the seat and is urged to lift pivotally about the hinge by at least one coil spring, adjustment means being provided to vary the tension in the spring by tightening or slackening the coil. In a preferred form, two such coil springs together carry a roller at one of their ends, which roller is disposed to bear upon the underside of the seat, and together carry a rod or bar at their other ends, which rod or bar may be moved to vary the tension in the coils.</p> |
