| 摘要 |
A shank assembly for tools, such as those used in tillage on farm implements, is provided with mechanism which, during use, will yield horizontally, yet not trip, when the tool encounters certain abnormal resistances, e.g. frozen or compact soils, thereby maintaining the tool in its proper attitude, which will trip in response to the tool encountering relatively immovable obstructions, for example large, heavy rocks, and which will automatically reset after the tool has cleared the obstruction.
|
