The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 1989
Filed:
Apr. 20, 1987
Wolfgang Kauss, Lohr-Wombach, DE;
Mannesmann Rexroth GmbH, Lohr/Main, DE;
Abstract
A method of controlling an attachment to an agricultural tractor in which the absolute movement of the attachment is determined by a motion sensor mounted thereon and is utilized as a control standard while the relative motion of the attachment with respect to the tractor, influenced by the controller and carried out by a power lift, is determined in such a way that the absolute movement of the attachment becomes zero. This control method achieves that the attachment maintains a constant position in space in spite of the pitch movements of the tractor acting as disturbances. This guarantees an automatic tilling process, for instance a uniform depth of the furrows when plowing. By utilizing superimposed feedbacks of further control standards, such as relative position and motor load, changes in the absolute position of the attachment are possible and overloading of the motor is avoided.