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. 06, 1979
Filed:
Dec. 16, 1977
Applicant:
Inventors:
Marcel J Boulais, Tolleson, AZ (US);
Richard A Boulais, Phoenix, AZ (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A01B / ; A01B / ;
U.S. Cl.
CPC ...
172-45 ; 172 12 ;
Abstract
A laser beam level control system for an earth-moving machine is provided with an automatic override function to temporarily block blade-down signals and raise the blade when lowering it or leaving it at its previous height would increase the force required to drive the machine across the ground above a preselected value which does not exceed the tractional force capability of the machine's drive wheels or exceed the machine's available horsepower.