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. 19, 1999
Filed:
Jan. 06, 1997
David J Rocke, Eureka, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An electrohydraulic control system for loading a bucket of an earthmoving machine includes sensors for producing machine parameter signals representative of how strongly the machine is crowding the pile of material to be loaded. A command signal generator monitors crowd factors corresponding to the sensed parameters to determine when the bucket contacts the pile, then generates bucket lift hydraulic cylinder command signals to maintain a traction force. The command signal generator next determines from the crowd factors when the pile is engaged near the machine capacity, then generates bucket tilt hydraulic cylinder command signals in proportion to the monitored crowd factors to rack the bucket at rates calculated to efficiently capture the material.