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:
Jun. 17, 1986
Filed:
Feb. 19, 1985
Werner K D'Almeida, Curitiba, BR;
Oldemar Boeck, Curitiba, BR;
Sperry Corporation, New Holland, PA (US);
Abstract
A pneumatic system for automatically controlling the height of a crop harvesting header on a combine is disclosed wherein the pneumatic system includes a cylinder which receives compressed air through pneumatic directional valves mounted on the crop harvesting header and actuated through ground sensors positioned under the header. The flow of compressed air from the directional valves operates a pneumatic cylinder, which in turn drives a hydraulic valve controlling the hydraulic header lift mechanism to move the header relative to the frame of the combine to maintain the relative position of the header to the ground. The pneumatic cylinder is also actuated to effect a raising of the crop harvesting header by another pneumatic directional valve connected to a control lever for shifting the primary drive of the combine to a reverse direction, thereby automatically raising the header when the combine is moved in a reverse direction.