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:
Oct. 21, 1980
Filed:
Feb. 12, 1979
Helmut Homburg, Harsewinkel, DE;
Abstract
The density of plant growth in front of a harvester machine is measured, to control the operating rate of the machine, by producing an ultrasonic field immediately forward of the cutters on the machine, which field comprises at least one ultrasonic beam of frequency modulated ultrasonic impulses. The apparatus employed comprises two transducers consisting respectively of an ultrasonic transmitter and an ultrasonic receiver respectively located on opposite sides of the machine immediately forward of the cutting blades and oriented on a line therebetween disposed orthogonally to the direction of travel of the machine, and at least one further ultrasonic transducer disposed adjacent one of said two transducers but oriented on a line relative to the other of said two transducerswhich line is inclined relative to the direction of travel of the machine.