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:
May. 08, 1990
Filed:
Jun. 06, 1988
Applicant:
Inventor:
Bruce K Fryk, Waverly, IA (US);
Assignee:
Deere & Company, Moline, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02F / ;
U.S. Cl.
CPC ...
414700 ; 9117 / ; 91520 ; 414708 ;
Abstract
A boom and bucket system for a loader includes a bucket leveling valve which maintains a desired orientation of the bucket as the boom is raised or lowered. A hydraulic circuit automatically and selectively supplies fluid for bucket leveling from boom cylinder return flow, from a pump, or from both in varying proportions.