Patent ID: 6477026
Filing Date: 2002-11-05
Classification: A01B,H01F

Abstract:
In an agricultural vehicle having a crop-engaging header attached thereto and movable relative to the ground surface by the expansion and contraction of at least one hydraulic cylinder interconnecting said vehicle and said header, said agricultural vehicle including an electromechanical control system for raising and lowering said header in response to changing field conditions sensed by said control system to meet operational parameters established by an operator, the improvement comprising:a transducer coupled to said header and configured to sense the position of said header with respect to the ground surface and to generate a header position signal; a single package solenoid comprising: a package, a solenoid configured to adjust the position of said header by activating said hydraulic cylinder; a control circuit coupled to said solenoid and having a control terminal coupled to said transducer, said control circuit configured to power said solenoid in proportional response to said header position signal received on said control terminal; and wherein said solenoid and said control circuit are contained in said package.