Tool apparatus with control to move tool when object approached

摘要

The disclosure in this patent application includes a retractable in-row tiller device that has a parallelogram carriage structure for supporting the outrigger arm and tiller and for retracting and extending the outrigger arm and tiller in relation to the tractor on which it is mounted. It also includes an electro-hydraulic control system with a single wand plant feeler device that provides very accurate and responsive automatic control to guide the tiller around plants and which can be overridden and operated manually with ease and accurateness. It also includes an automatic positive depth control feature operated electro-hydraulically by a gauge wheel.