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:
Dec. 28, 1982
Filed:
Nov. 18, 1981
Applicant:
Inventors:
Frank A Ecker, Racine, WI (US);
Theodore G Jensen, Kenosha, WI (US);
Norman B Christensen, Racine, WI (US);
Assignee:
Bucyrus-Erie Company, South Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E02F / ; F15B / ;
U.S. Cl.
CPC ...
37103 ; 37DI / ; 414685 ; 13759614 ; 13762563 ;
Abstract
A maximum lift system for a hydraulic hoe includes a dual pressure relief valve in the hoist circuit and an actuating valve that delivers a signal to the relief valve to increase hoist capacity and simultaneously causes operation of lockout valves to center the wrist control valve and thus lock the dipper in position.