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:
Apr. 05, 1977
Filed:
Jan. 02, 1976
Applicant:
Inventors:
Donald J Parquet, Burlington, IA (US);
Carl O Pedersen, Burlington, IA (US);
Robert M Barton, Davenport, IA (US);
Assignee:
J. I. Case Company, Racine, WI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02F / ;
U.S. Cl.
CPC ...
2141 / ; 37DI / ; 91-1 ; 91361 ; 214762 ;
Abstract
An automatic control system for a backhoe utilizing a bucket at the end of a rigid boom is disclosed herein. The automatic control system includes an actuator cooperating with a control valve that controls the flow of fluid to hydraulic rams that pivot the boom. The control system also includes position indicating means between the boom and the frame and a manually settable control element both of which produce output signals that are combined and activate the actuator so that the implement is moved at a rate which corresponds to the differences between the respective signals.