| 摘要 |
A return device comprising at least one spring ( 2 ) exerting an elastic return force on two elements ( 11 ) which can be displaced between a rest position and a mutually parted end position separated from one another by a distance which increases with the wear on a part. and a load-relieving connecting piece ( 3 ) mounted in series with the spring ( 2 ) between the two moving elements ( 11 ). The load-relieving connecting piece ( 3 ) has a useful length (L) that increases with the wear as an elastic return force is exerted by the spring exceeding a predetermined load threshold.
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