Patent ID: 7543655

Claim:
A manual electro-hydraulic selective depth control system for establishing a set position of a device above the ground as the device is moved across a surface, the selective depth control system comprising: a. a toggle input device for specifying a plurality of position settings; b. a device position sensor for determining a measured device position; and c. a hydraulic position control system having a processor programmed with a ground zero position and a programmed maximum depth position for the device, wherein the hydraulic position control system maintains a set position corresponding to the measured device position within a specified position within a specified position window around the set position programmed relative to the ground-zero and maximum-depth position; d. wherein the toggle input device comprises: e. a working position that places the set position at one of said programmed positions; f. a shallow position that places the set position at a minimum deployed depth; g. a zero position that places the hydraulic position control system in a permanent de-energized mode.