| 摘要 |
The row marker for farm planters has a horizontal base bar and a vertical post. A main arm and brace arm are pivotally mounted to the base bar. A marker bar is pivotally mounted between the outer ends of the main and brace arms, with the pivot mounting of the marker bar being intermediate its ends so as to provide a stub lever marker bar section. A diversion arm extends between the main and brace arms and has one end mounted for pivotal and longitudinally floating movement at the upper end of the post, and the other end pivotally mounted to the stub lever marker bar section. Powered means swings the main arm upwardly and effects an overhead folding of the marker bar. The floating pivot of the diversion arm permits variation in the horizontal projection of the main arm and marker bar in response to the level of land. |
