| 摘要 |
A spring suspension unit adapted to extend between spaced relatively movable members so as yieldably to maintain them in spaced relation and including a coil spring with an inflatable, resilient synthetic plastic bag disposed within the coil springs and expandable to dispose side wall portions of the bag between the convolutions of the spring. The bag is formed of cup-shaped portions having projecting flanges at their open ends which are heat-sealed in abutting air-sealed relation and provide a radially projecting spring convolution engaging ring. Either a valve or a connector forms a part of the bag for facilitating the introduction of air under pressure thereto. |
