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:
Jan. 18, 1994
Filed:
Aug. 25, 1992
Applicant:
Inventors:
Victor D Trotter, Arlington, TX (US);
Robert L Woods, Arlington, TX (US);
Assignee:
Air Tractor Inc., Olney, TX (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B64D / ; B67D / ; B67D / ;
U.S. Cl.
CPC ...
244136 ; 169 53 ; 239171 ; 222 14 ; 222 52 ; 222 64 ;
Abstract
An airborne container for a liquid or other flowable material has bottom doors which are opened to release the material on the ground below the aircraft. To maintain a specified coverage level, a control system which includes a digital controller repeatedly calculates a differential pressure across the doors and varies the position of the doors to maintain a constant material flow rate as the differential pressure varies. The control system closes the doors when a specified volume of material has been spread.