| 摘要 |
An energy absorbing device comprising: a primary energy absorber, lever means operatively connected to the primary energy absorber, a wheel rotatably carried by the lever means, and a secondary energy absorber operatively interposed between the primary energy absorber and the lever means. The secondary energy absorber includes a variable volume fluid chamber and a valve for communicating the chamber with a fluid pressure source. The secondary energy absorber is responsive to relatively large vertical deflections of said wheel to minimize the effect thereof on said primary energy absorber means.
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